Note: Descriptions are shown in the official language in which they were submitted.
`~ 2026~
A-17781/+
Stabilised organic material
The present invendon relates to composidons comprising a) an organic material which is
susceptible to degradadon induced by oxidation, heat and actinic radiadon, b) a bisphenol
monoacrylate and c) a bisphenol. The invendon further relates to the use of a composidon
containing a bisphenol monoacrylate and a bisphenol for stabilising organic material.
Stabilisers selected from the group of the bisphenols and bisphenol monoacrylates are
known and commercially available.
Japanese Patent Kokai Sho 61/159 442 discloses films of a styrene/butadiene block
copolymer which contains, inter alia, a bisphenol monoacrylate and a bisphenol.
In-one of its aspects, dhe present invention relates to a composidon comprising
.
a) an organic material which is suscepdble to degradadon induced by oxidadon, heat and
actinic radiation,
b) at least one compound of formula I
: . O R3 R4
~: ~ ' . Il I I
: OH O C - C = CH
Rl~,XI~"R~
. ' R2 R2
wherein Xl is a sulfur atom or Cl-CI2aLkylidene, Rl and R2 are each independendy of the
other hydrogen, Cl-C24aL~cyl, Cs-CI2cycloalkyl, C5-C7cycloaLkyl which is subsdtuted by
Cl-C4aLI~yl, or are phenyl or C7-CIOphenylalkyl, R3 and R4 are each independently of the
other hydrogen or Cl-C8aL~yl,
~` 2~26~
and
c) at least one compound of formula IIa and/or IIb,
OH OH R7 R7
R6 R6 R8 R8
~a) ~b)
wherein X2 and X3 are each independently of the other a sulfur atom or Cl-CI2aLkylidene,
R5 and R6 are each independendy of dhe odher hydrogen, Cl-C24alkyl, Cs-Cl2cycloaLkyl,
Cs-C7cycloalkyl which is substituted by Cl-C4aLIcyl, or are phenyl or C7-ClOphenylaLtcyl, ~ ;~
R7 and R8 are each independently of the other Cl-C4aL~cyl, with dhe proviso that the radical -
X3 in formula IIb is different from sulfur if the component a) is a styrenelbutadiene block
copolymer.
Cl-CI2ALkylidene may be methylene or a ~oup -CHR-, wherein R is preferably
straight-chain aL~cyl, most preferably methyl. Methylene is one of the especially preferred
meanings of Xl, X2 und X3.
Cl-C24AL~yl is typically methyl, ethyl, propyl, isopropyl, butyl, tert-butyl, pentyl, hexyl,
heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, tetradecyl, pentadecyl, hexadecyl,
heptadecyl, octadecylj nonadecyl, eicosyl, heneicosyl, docosyl, tricosyl or tetracosyl.
Cl-CI8AL~yl is preferred. One of the especially preferred meanings of Rl, R2, Rs and R6
is Cl-C4aLkyl, such as methyl or tert-butyl.
Cs-CI2CycloaLlcyl may be cycIopentyl, cyclohexyl, cycioheptyl, cyclooctyl, cyclononyl,
cyclodecyl or cyclododecyl. Cs-C7CycloaLl~yl, preferably cyclohexyl, is preferred.
C5-C7CycloaLIcyl which is substituted by Cl-C4aL1cyl may be methylcyclohexyl.
C7-qOPhenylallcyl may be benzyl or phenylethyl.
~ ~ 2 ~
R3 and R4 as Cl-C8alkyl is typically methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl or
octyl. Cl-C4Alkyl, more particularly methyl, is preferred.
R7 and R8 as Cl-C4aLkyl is typically methyl, ethyl, propyl, isopropyl, butyl or tert-butyl.
R7 is preferably methyl and R8 is preferably tert-butyl.
Useful compositions are those wherein Xl, X2 and X3 are each independently of one
another a sulfur atom or Cl-C4aLlcylidene, Rl, R2, R5 and R6 are each independently of one
another Cl-Cl8aLIcyl, Cs-C7cycloalkyl, Cs-C7cycloaL~cyl which is substituted by
Cl-C4alkyl, or are phenyl or C7-ClOphenylaLkyl, R3 and R4 are each independendy of the
other hydrogen or Cl-C4aL~cyl, and R7 and R8 are each independently of the otherCl-C4alkyl.
Component b) is preferably selected from compounds of formula I, wherein Xl is a sulfur
atom, methylene or ethylidene, Rl and R2 are each independently of the other Cl-C4aL~cyl,
cyclohexyl, methylcyclohexyl, phenyl or benzyl, and R3 and R4 are each independendy of
the odher hydrogen or Cl-C4alkyl.
Particularly preferred compounds of formula I are those wherein Xl is a sulfur atom,
methylene or ethylidene, Rl and R2 are each independently of the other Cl-C4alkyl, and
R3 and R4 are hydrogen or methyl.
Component c) is preferably selected from compounds of formula IIa, wherein X2 is a
sulfur atom, methylene or ethylidene, and Rs and R6 are each independendy of the other
Cl-C4allcyl, cyclohexyl, methylcyclohexyl, phenyl or benzyl.
Particularly preferred compounds of formula IIa are dhose wherein X2 is a sulfur atom,
methylene or ethylidene, and Rs and R6 are each independently of the other Cl-C4aL~cyl.
Preferred compounds of formula IIb are those wherein X3 is a sulfur atom, and R7 and R8
are each independendy of the other Cl-C4alkyl.
Particularly useful compositions are those in which component b) is selected from the
group consisting of
r~
.j . .. . .. .
-~ 2~26~
CH3
OH O--C - CH= CH2OH O - C - C CH2
(H3C~3C ~ S ~ C(CH3)3(N3C3C ~ S ~ C(CH~3
CH3 CH3 CH3 CH3
O O
Il ~ 11 .
OH O - C - CH= CH2 OH O - C - CH= CH2
(H3C3C~CN~4CN3)3 IH3C)3C~IH~C(CH3)3
CH3 CH3 C(CH3)3 C(CH3)3
.
and component c) is selected from the group consisting of ;~
OH OH H3C CH3 -.
(H3C)3C ~ S ~ C(CH3)3 ~ ~
, H ~ S ~ OH
CH3 CH3 (H3C)3C C(CH3
,::
OH OH OH OH
(H3C)3C~CH~C(CN3)3 (N3C3C~ 2~c(cH3)3
C(CH3)3 C(CH3)3 CH3 CH3
Particularly preferred compositions are those wherein component b) is
." .. , ` . , ,. . ' :. ' '. : '
`" 2~26~J
OH O--C--CH= CH2
(H3C)3C~ 3~C(CH3)3
CH3 CH3
and component c) is
OH OH
(U3ChC~S~C(CU~h
CH3 CH3
Illustrative exarnples of component a) are:
1. Polymers of monoolefins and diolefins, for example polypropylene, polyisobutylene,
polybut-l-ene, polymethylpent-l-ene, polyisoprene or polybutadiene, as well as polymers
of cycloolefins, for example of cyclopentene or norbornene, polyethylene (which can be
uncrosslinked or crosslinked), for example high density polyethylene (HDPE), low density
polyethylene (LDPE and linear low density polyethylene (LLDPE).
2. Mixtures of the polymers mendoned under 1), for example mixtures of polypropylene
with polyisobutylene, polypropylene with polyethylene (for exarnple PPIHDPE,
PP/LDPE) and mixtures of different types of polyethylene (for example LDPE/HDPE).
3 . Copolymers of monoolefims and diolefins with each other or with other vinyl
monomers, for example ethylene/propylene copolymers linear low density polyethylene
(LLDPE) and mixtures thereof with low density polyethylene (LDPE),
propylenelbut-l-ene copolymers, ethylenelhexene copolymers, ethylene/methylpentene
copolymers, ethylene,lheptene copolymers, ethylene/octene copolymers,
propylenelbutadiene copolymers, isobutylene/isoprene copolymers, ethylene/aLkyl acrylate
copolymers, e~ylenelalkyl methacrylate copolymers, ethylene/vinyl acetate or
ethylene/acrylic acid copolymers and their salts (ionomers), as well as terpolymers of
ethylene with propylene and a diene such as hexadiene, dicyclopentadiene or
''.: `~i:: ~ ,. '',
::` 21D26~
ethylidenenorbornene; and also mixtures of such copolymers with each other and with
polymers mentioned in 1) above, for example polypropylene/ethylene propylene
copolymers, LDPE/EVA, LDPE/EAA, LLDPE/EVA and LLDPE/EAA.
3a. Hydrocarbon resins (for example Cs-Cg), including hydrogenated modificationsthereof (for example tackifiers).
4. Polystyrene, poly-(p-methylstyrene), poly-(a-methylstyrene).
5. Copolymers of styrene or a-methylstyrene with dienes or acrylic derivatives, for
example styrenel[ch]butadiene, styrene/acrylonitrile, styrene/alkylmethacrylate,styrene/butadiene/aLlcylacrylate, styrene/ maleic anhydride, styrene/acrylonitrile/methyl
acrylate; mixtures of high impact strength from styrene copolymers and another polymer,
for example from a polyacrylate, a diene polymer or an ethylene/propylene/diene
terpolymer; and bloel~ copolymers of styrene, for example styrene/butadiene/styrene,
styrene/isoprene/styrene, styrene/ethylene/butylene/styrene or
styrene/ethylene/propylene/styrene.
6. Graft copolymers of styrene or a-methylstyrene, for example styrene on polybutadiene,
styrene on polybutadiene/styrene or polybutadiene/acrylonitrile; styrene and acrylonitrile ` ;
(or methacrylonitrile) on polybutadiene; styrene and maleic anhydride or maleimide on
polybutadiene; styrene, acrylonitrile and maleic anhydride or maleimide on polybutadiene;
styrene, acrylonitrile and methyl methacrylate on polybutadiene, styrene and aL~cyl
acrylates or methacrylates on polybutadiene, styrene and acrylonitrile on
ethylene/propylene/diene teIpolymers, styrene and acrylonitrile on polyaLIcylacrylates or
polyaLl~ylmethacrylates, styrene and acrylonitrile on acrylate/butadiene copolymers, as
well as mixtures thereof with the copolymers listed under 5), for example the copolymer
mixtures known as ABS, MBiS, ASA or AES polymers.
7. Halogenated polymers such as polychloroprene, chlorinated rubbers, chlorinated or
sulfochlorinated polyethylene, copolymers of ethylene and chlorinated ethylene,
epichlorohydrin homo- and copolymers, preferably polymers of halogenated vinyl
compounds, for example poly- vinylchloride, polyvinylidene chloride, polyvinyl fluoride,
polyvinylidene fluoride, as well as copolymers thereof, for example vinyl
chloride/vinylidene chloride, vinyl chloride/vinyl acetate or vinylidene chloride!vinyl
acetate copolymers.
2~26~
8. Polymers derived from a"B-unsaturated acids and derivatives thereof, such as
polyacrylates and polymethacrylates, polyacrylamides and polyacrylonitriles.
9. Copolymers of the monomers mentioned under 8) with each other or with other
unsaturated monomers, for example acrylonitrile/butadiene copolymers, acrylo-
nitrile/aLkylacrylate copolymers, acrylonitrile/aLlcoxyaLlcylacrylate or acrylonitrile/vinyl
halide copolymers or acrylonitrile/aL~cylmethacrylate/butadiene terpolymers.
10. Polymers derived from unsaturated alcohols and amines or the acyl derivatives or
acetals thereof, such as polyvinyl alcohol, polyvinyl acetate, polyvinyl stearate, polyvinyl
benzoate, polyvinyl maleate, polyvinylbutyrate, polyallyl phthalate or polyallylmelamine;
as well as their copolymers with the olefins mentioned in 1) above.
11. Homopolymers and copolymers of cyclic ethers such as polyaLIcylene glycols,
polyethylene oxide, polypropylene oxide or copolymers thereof with bisglycidyl ethers.
12. Polyacetals such as polyoxymethylene and those polyoxymethylenes which contain
ethylene oxide as a comonomer, polyacetals modified with thermoplastic polyurethanes,
acrylates or MBS.
13. Polyphenybne oxides and sulfides and mixtures thereof with polystyrene or
polyamides.
14. Polyurethanes which are derived from polyethers, polyesters or polybutadienes
carrying terminal hydroxyl groups on the one hand and aliphatic or aromatic
polyisocyanates on the other, as well as precursors thereo
15. Polyamides and copolyamides which are derived from diamines and dicarboxylicacids andl[ch]or from arninocarboxylic acids or the corre- sponding lactams, such as
polyamîde 4, polyamide 6, polyamide 6/6, 6/10, 6/9, 6/12 and 4/6, polyamide 11,
polyamide 12, aromatic polyamides obtained by condensation of m-xylene, diamine and
adipic acid; polyamides prepared from hexamethylenediamine and isophthalic and/or
terephthalic acid, with or without an elastomer as modifier, for example poly-2,4,4,-
trimethylhexamethylene terephthalamide or poly-m-phenylene isophthalamide; blockcopolymers of the aforementioned polyamides with polyolefins, olefin copolymers,
-` 2~2~
ionomers or chemically bonded or grafted elastomers; or with polyethers, for example
with polyethylene glycol, polypropylene glycol or polytetramethylene glycol; and also
polyamides or copolyamides modified with EPDM or ABS, and polyamides condensed
during processing (RIM polyamide systems).
16. Polyureas, polyimides and polyamide-imides and polybenz~midazoles.
17. Polyesters derived from dicarboxylic acids and diols and/or from hydroxycarboxylic
acids or the corresponding lactones, such as poly-ethylene terephthalate, polybutylene
terephthalate, poly-1,4-dimethylolcyclohexane terephthalate, polyhydroxybenzoates as
well as block-copolyether esters derived from hydroxyl-terminated polyethers; and also
polyesters modified with polycarbonates or MBS.
18. Polycarbonates and polyester carbonates.
19. Polysulfones, polyether sulfones and polyether ketones.
20. Crosslinked polymers which are derived from aldehydes on the one hand and phenols,
ureas and melamines on the other hand, such as phenol/formaldehyde resins,
urea/formaldehyde resins and melamine/formaldehyde resins.
21. Drying and non-drying aL~yd resins.
22. Unsaturated polyester resins which are derived from copolyesters of saturated and
unsaturated dicarboxylic acids with polyhydric alcohols and vinyl compounds as
crosslinking agents, and also halogen-containing modifications thereof of low
flammability.
,
23. Crosslinkable acrylic resins derived from substituted acrylic esters such as epoxy
acrylates, urethan-e acrylates or polyester acrylates.
24. Alkyd resins, polyester resins or acrylate resins which are cross-linked with melamine
resins, urea Dsins, polyisocyanates or epoxy resins.
25. Crosslinked epoxy resins which are derived from polyepoxides, for example from
bisglycidyl ethers or from cycloaliphatic diepoxides.
` ~ - ` ` 2 ~
26. Natural polymers such as cellulose, rubber, gelatine and chemically modifiedhomologous derivatives thereof such as cellulose acetates, cellulose propionates and
cellulose butyrates, or the cellulose ethers, such as methylcellulose; as well as rosins and
their derivatives.
27. Mixtures (polyblends) of the aforementioned polymers, for example PP/EPDM,
Polyamide 61EPDM or ABS, PVC/EVA, PVS/ABS, PVC/MBS, PC/ABS, PBTP/ABS,
PC/ASA, PC/PBT, PVC/CPE, PVC/acrylates, POMJthermoplastic PUR, PC/thermoplastic
PUR, POM/acrylate, POM/MBS, PPE/HIPS, PPE/PA 6.6 and copolymers, PA/HDPE,
PA/PP, PA/PPE.
28. Naturally occurring and synthetic organic materials which are pure monomericcompounds or mixtures of such compounds, for example mineral oils, animal and
vegetable fasts, oil and waxes, or oils, fats and waxes based on synthetic esters (e.g.
phthalates, adipates, phosphates or trimellitates) and also the mixtures of synthetic esters
with mineral oils in any weight ratios which are used as spinning compositions, as well as
aqueous emulsions of such materials.
29. Aqueous emulsions of natural or synthetic rubber, for exarnple natural latex or latices
of carboxylated styrenelbutadiene copolymers.
Component a) is preferably a synthetic polymer, a synthetic oil or a mineral oil. It is most
preferred to use polyolefims such as the polymers listed in items l) to 3) above, especially
crosslinked polyolefins or polyolefins to be crosslinked, as component a). On account of
its melting point, the mixture of components b) and c) is particularly suitable for
stabilising crosslinked polyethylene.
The concentration of components b) and c), together, is conveniently 0.0l to l0 %,
preferably 0.0l to 5 %, most preferably 0.0l to 2 % or 0.05 to 2 %, based on the total
weight of the composition. The ratio of components b) and c) is, for example, 95/5 to 5/95,
preferably 80/20 to 60/40, most preferably 75/25 to 65/35, ~or example 75i25 to 70/30 or
70/30 to 65/35.
~ .
In addition to components a), b) and c), the compositions of the invention may further
contain conventional additives, for example those listed below.
-`-` 2~6~
- 10-
1. Antioxidants
1.1. AL~cYlated monophenols, for example 2,6-di-tert-butyl-4-methylphenol, 2-tert-
butyl-4,6-dimethylphenol, 2,6-di-tert-butyl-4-ethylphenol, 2,6-di-tert-butyl-4-n-
butylphenol, 2,6-di-tert-butyl-4-isobutylphenol, 2,6-dicyclopentyl-4-methylphenol,
2-(a-methylcyclohexyl)- 4,6-dimethylphenol, 2,6-dioctadecyl-4-methylphenol, 2,4,6-tri-
cyclohexylphenol, 2,6-di-tert-butyl-4-methoxymethylphenol, 2,6-di-nonyl-4-methyl-
phenol.
: .
1.2. ALIcvlated hvdroquinones,for example 2,6-di-tert-butyl-4-methoxyphenol,
2,5-di-tert-butylhydroquinone, 2,5-di-tert-amylhydroquinone, 2,6-diphenyl-4-octadecyl-
oxyphenol.
1.3. Hydroxvlated thiodiphenvl ethers, for example 2,2'-thiobis(6-tert-butyl-4-methyl-
phenol), 4,4'-thiobis~6-tert-butyl-2-methylphenol).
1.4. AL~cYlidenebisphenols, for example 4,4'-methylenebis(2,6-di-tert-butylphenol),
4,4'-methylenebis(6-tert-butyl-2-methylphenol), 1,1-bis-(S-tert-butyl-4-hydroxy-2-methylphenyl)butane, 2,6-bis(3-tert-butyl-5-methyl-2-hydroxybenzyl)-4-methylphenol,
1,1,3-tris(S-tert-butyl-4-hydroxy-2-methylphenyl)butane, 1,1-bis(S-tert-butyl-4-hydroxy-
2-methylphenyl)-3-n-dodecylmercaptobutane, ethylene glycol bis[3,3-bis(3'-tert-
butyl-4'-hydroxyphenyl)butyrate], bis(3-tert-butyl-4-hydroxy-S-methyl-phenyl)-
dicyclopentadiene, bis[2-(3'-tert-butyl-2'-hydroxy-S'-methyl-benzyl)-6-tert-butyl-
4-methylphenyl] tereph~alate.
l.S. Benzvl compounds, for example 1,3,5-tris(3,5-di-tert-butyl-4- hydroxybenzyl)-
2,4,6-trimethylbenzene, bis(3,5-di-tert-butyl-4-hydroxybenzyl) sulfide, isooctyl3,5-di-tert-butyl-4-hydroxybenzylmercaptoacetate, bis(A-tert-butyl-3-hydroxy-2,6-
dimethylbenzyl) dithiolterephthalate, 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)
isocyanurate, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) isocyanurate,
dioctadecyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate, calcium salt of monoethyl
3,5-di-tert-butyl-4-hydroxybenzylphosphonate, 1,3,5-tris-(3,5-dicyclohexyl-4-
hydroxybenzyl)isocyanura~e.
1.6. Acvlaminophenols, for example 4-hydroxylauranilide, i-hydroxystearanilide,
; . ,
-^~` 2~2~
11 -
2,4-bis(octylmercapto)-6-(3,5-di-tert-butyl-4-hydroxyanilino)-s-triazine, octyl
N-(3,5-di-tert-butyl-4-hydroxyphenyl)carbamate .
1.7. Esters of ~-(3.5-di-tert-butvl-4-hvdroxYphenYl)propionic acid with mono- orpolyhydric alcohols, e.g. with methanol, diethylene glycol, octadecanol, triethylene glycol,
1,6-hexanediol, pentaerythritol, neopentyl glycol, tris(hydroxyethyl) isocyanurate,
thiodiethylene glycol, N,N'-bis(hydroxyethyl)oxalyl diamide.
1.8. Esters of ,B-(5-tert-butvl-4-hvdroxv-3-methvlphenvl)propionic acid with mono- or
polyhydric alcohols, e.g. with methanol, diethylene glycol, octadecanol, triethylene glycol,
1,6-hexanediol, pentaerythritol, neopentyl glycol, tris~hydroxyethyl) isocyanurate,
thiodiethylene glycol, N,N'-bis(hydroxyethyl)oxalyl diamide.
1.9. Esters of 1~-(3,5-dicvclohexvl-4-hYdroxvphenvl)propionic acid with mono- orpolyhydric alcohols, e.g. with methanol, diethylene glycol, octadecanol, triethylene glycol,
1,6-hexanediol, pentaerythritol, neopentyl glycol, tris(hydroxyethyl) isocyanurate,
thiodiethylene glycol, N,N'-bis(hydroxyethyl)oxalyl diamide.
1.10. Amides of l~i-(3~5-di-tert-butYl-4-hvdroxvPhenvl)propionic acid e.g.
N,N'-bis(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hexamethylene-diamine,
N,N'-bis(3,5 di-tert-butyl-4-hydroxyphenylpropionyl)trimethylene-diamine,
N,N'-bis(3,5~i-tert-butyl-4-hydroxyphenylpropionyl)hydrazine.
2. UV absorbers and li~ht stabilisers
2.1. 2-(2'-Hvdroxyphenv!)benzotriazoles, for example the 5'-methyl, 3',5'-di-tert-butyl,
5'-tert-butyl, 5'-(1,1,3,3-tetramethylbutyl), 5-chloro-3',5'-di-tert-butyl, S-chloro-
3'-tert-butyl-5'-methyl, 3~-sec- butyl-5'-tert-butyl, 4'-octoxy, 3',5'-di-tert-amyl and
3',5'-bis(a,c~-dimethylbenzyl) derivative.
2.2. 2-Hvdroxvbenzophenones. for example the 4-hydroxy, 4-methoxy, 4-octoxy,
4-decyloxy, 4-dodecyloxy, 4-benzyloxy, 4,2',4i-trihydroxy and 2'-hydroxy-4,4'-
dimethoxyderivative.
2.3. Esters of substituted and unsubstituted benzoic acids, for example, 4-tert-butylphenyl
salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoylresorcinol,
,. , . ~ ., ~
.: :, . , : ' , , , . : 1 ~ ' '
bis(4-tert-butylbenzoyl)-resorcinol, benzoylresorcinol, 2,4-di-tert-butylphenyl
3,5-di-tert-butyl-4-hydroxy- benzoate and hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate.
2.4. Acrvlates, for example ethyl a-cyano-~,~-diphenylacrylate, isooctyl a-cyano-
,B"B-diphenylacrylate, methyl a-carbomethoxycinnamate, methyl a-cyano-,~-methyl-p-
methoxy-cinnamate, butyl a-cyano-~-methyl-p-methoxy- cinnamate, methyl a-carbo-
methoxy-p-methoxycinnamate and N-(,~-carbomethoxy-,~-cyanovinyl)-2-methylindoline.
2.5. Nickel compounds~ for example nickel complexes of 2,2'-thio-bis[4-(1,1,3,3-tetra-
methylbutyl)phenol], such as the 1:1 or 1:2 complex, with or without additional ligands
such as n-butylamine, triethanolamine or N-cyclohexyldiethanolamine, nickel dibutyl-
dithiocarbamate, nickel salts of 4-hydroxy-3,5-di-tert-butylbenzyl-phosphonic acid
monoalkyl esters, e.g. of the methyl or ethyl ester, nickel complexes of ketoximes, e.g. of
2-hydroxy-4-methyl-phenyl undecyl ketoneoxime, nickel complexes of 1-phenyl-4-
lauroyl-5-hydroxypyrazole, with or without additional ligands.
2.6. Stericallv hindered amines. for example bis(2,2,6,6-tetramethyl-piperidyl) sebacate,
bis(l ,2,2,6,6-pentamethylpiperidyl) sebacate, bis( 1 ,2,2,6,6-pentamethylpiperidyl)
n-butyl-3,5-di-tert-butyl-4-hydroxy-benzylmalonate, the condensation product of
1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, the
condensation product of N,N'-bis(2,2,6,6-tetramethyl-4-piperidyl)hexamethylenediamine
and 4-tert-octylamino-2,6-dichloro-1,3,5-triazine, tris(2,2,6,6-tetramethyl-4-piperidyl)
nitrilotriacetate, tetrakis(2,2,6,6-tetramethyl-4- piperidyl)-1,2,3,4-butane-tetracarboxylate,
1,1 '-(1 ,2-ethanediyl)bis-(3,3,5,5-tetramethylpiperazinone).
2.7. Oxalyl diamides. for example 4,4'-dioctyloxyoxanilide, 2,2'-dioctyloxy-S,S'-
di-tert-butoxanilide, 2,2'-didodecyloxy-S,S'-di-tert-butoxanilide, 2-ethoxy-2'-
ethyloxanilide, N,N'-bis(3-dimethylaminopropyl)oxalamide, 2-ethoxy-S-tert-butyl-2'-ethyloxanilide and its mixture with 2-ethoxy-2'-ethyl-5,4'-di-tert-butoxanilide and
mixtures of ortho- and para-methoxy-disubstituted oxanilides and mixtures of o- and
p-ethoxydisubstituted oxanilides.
2.8. 2-(2-HydroxvphenYI~-1,3,5-triazines. for example 2,4,6-tris(2-hydroxy-4-octyloxy-
phenyl)-1,3,5-triazine, 2-(2-hydroxy-4-octyloxy-phenyl)-4,6-bis(2,4-dimethylphenyl)-
1 ,3,5-triazine, 2-(2,4-dihydroxy-phenyl)-4,6-bis(2,4-dimethylphenyl)- 1 ,3,5-triazine,
2,4-bis(2-hydroxy-4-propyloxyphenyl)-6-(2,4-dimethylphenyl)- 1 ,3,5-triazine,
2~26~
2-(2-hydroxy-4-octyloxyphenyl)-4,6-bis(4-methylphenyl)-1,3,5-t;iazine, 2-(2-hydroxy-
4-dodecyloxyphenyl)-4,6-bis(2,4-dimethylphenyl)- 1 ,3,5-triazine.
3. Metal deactivators, for example N,N'-diphenyloxalyl diamide, N-salicylal-
N'-salicyloylhydrazine, N,N'-bis(salicyloyl)hydrazine, N,N'-bis(3,5-di-tert-
butyl-4-hydroxyphenylpropionyl)hydrazine, 3-salicyloyl- amino-1,2,4-t.iazole,
bis(benzylidene)oxalic dihydrazide.
4. Phosphites and phosphonites. for example triphenyl phosphite, diphenylaL~yl
phosphites, phenyldiaLkyl phosphites, tris(nonylphenyl) phosphite, trilauryl phosphite,
trioctadecyl phosphite, distearyl pentaerythritol diphosphite, tris(2,4-di-tert-butylphenyl)
phosphite, diisodecyl pentaerythritol diphosphite, bis(2,4-di-tertbutylphenyl) penta-
erythritol diphosphite, tristearyl sorbitol triphosphite, tetrakis-(2,4-di-tert-butylphenyl)
4,4'-biphenylene diphosphonite, 3,9-bis(2,4-di-tert-butylphenoxy)-2,4,8,10-
tetraoxa-3 ,9-diphosphaspiro[S .S]undecane.
5. Peroxide scavengers~ for example esters of ,B-thiodipropionic acid, for example the
lauryl, stearyl, myristyl or tridecyl esters, mercaptobenzimidazole or the zinc salt of
2-mercaptobenzimidazole, zinc dibutyldithiocarbamate, dioctadecyl disulfide,
pentaerythritol tetrakis(,B-dodecylmercapto)propionate.
6. Polvamide stabilisers. for example, copper salts in conjunction with iodides and/or
phosphorus compounds and salts of divalent manganese.
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7. Basic co-stabilisers. for example, melamine, polyvinylpyrrolidone, dicyandiamide,
triallyl cyanurate, urea derivatives, hydrazine derivadves, amines, polyamides,
polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids for
example calcium stearate, zinc stearate, magnesium stearate, sodium ricinoleate and
potassium palmitate, antimony pyrocatecholate or zinc pyrocatecholate.
8. Nucleatin~ a~ents, for example, 4-tert-butylbenzoic acid, adipic acid, diphenylacetic
acid.
9. Fillers and reinforcin~ agents. for example calcium carbonate, silicates, glass fibres,
asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxydes, carbon black,
graphite.
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10. Other additives. for example, plasticisers, lubricants, emulsifiers, pigments,
fluorescent whitening agents, flameproofing agents, antistatic agents and blowing agents.
The conventional additives are added, for example, in concentrations of 0.0l to 10 %,
based on the total weight of the composition.
Components b) and c) can be added singly or in admuxture to the material to be stabilised
[component a)]. If the material to be stabilised is a po1ymer, components b) and c) can
also be added before or during the polymerisation or crosslinking. The incorporation of
components b) and c) as well as further additives in a polymeric material can also be
effected, for example, before or during the shaping to moulded articles, or also by
applying a solution or dispersion of the compounds to a polymeric material and
subsequently evaporating the solvent.
Components b? and c) can also be added to the material to be stabilised singly or together
in the form of a masterbatch which contains them, for example, in a concentration of 2.5
to 25 % by weight.
The stabilised material may be used in a wide range of presentation, for exarnple as sheets,
filaments, ribbons, moulding compounds, profiles or as binders for paints, adhiesives or
puffles, or as~insulating material for wires, especially for power cables.
The compounas of formulae I, lIa and m are known and, if they are not commercially
available, can be prepared by methods known to the skilled person, for example as
described in US patent specification 3 984 372.
In another of its aspects, the invention relates to the use of a mixture comprising at least
one compound of formula I and at least one compound of forrnula IIa and/or IIb for
stabilising an organic material against degradation induced by oxidation, heat and actinic
radiation, with the proviso that the radical X3 in formula lIb is different from sulfur if the
organic material is a styrene/butadiene block copolymer.
The invention is illustrated in more detail by the following Examples.
Example l: 26 g of polyethylene (density = (0.926 - 0.929)g/cm3; melt index = (0.15 -
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0.30)g/10 min at 190C and 2.16 kg) are rnixed with 0.28 % by weight of 2,2'-thio-bis-
[6-tert-butyl-4-methylphenol]monoacrylate and 0.12 % by weight of 2,2'-thio-bis[6-tert-
butyl-4-methylphenol~ and plasticised in a Brabender plastograph for 5 minutes at 125C.
Then a further 12 g of polyethylene are added together with 2 % by weight of dicumyl
peroxide as radical former, and the mixture is kneaded for 5 minutes at 125C. The
resultant polymer melt is pressed at 125C in a press to a 1 mm sheet. In a second press,
the polymer of which the sheet consists is crosslinked for lS minutes at 180C. In a third
press, the sheet is cooled to room temperature. Dumbbell-shaped samples are thenpunched from ~his sheet in accordance with DIN 52 504. For determining the resistance to
ageing, the specimens are hung in a circulating air drier heated to 150C and subjected at
regular intervals to an elongation at load test. The results show an excellent stabilising
effect.
Example 2: 26 g of polyethylene (density = 0.92 g/cm3; melt index = 2 g/10 min at 190C
and 2.16 kg) are mixed with 0.14 % by weight of 2,2'-thio-bis[6-tert-butyl-
4-methylphenol]monoacrylate and 0.06 % by weight of 2,2'-thio-bis[6-tert-butyl-
4-methylphenol] and plasticised in a Brabender plastograph for 3 minutes at 130C. Then
a further 12 g of polyethylene are added together with 1.8 % by weight of dicumyl
peroxide as radical former, and the mixture is kneaded for 7 minutes at 130C. The
resultant polymer melt is pressed at 130C in a press to a 1 mm sheet. In a second press,
the polymer of which the sheet consists is crosslinked for 15 rninutes at 180C. In a third ~ -
press, the sheet is cooled to room temperature. Dumb-bell shaped samples are then
punched from this sheet in accordance with DIN 52 504. For determining the resistance to
àgeing, the specimens are hung in a circulating air drier heated to 150C and tested at
regular intervals for decomposition, which occurs in this case after 96 hours.
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