Canadian Patents Database / Patent 2549844 Summary

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(12) Patent: (11) CA 2549844
(54) English Title: SOLID PHASE DISPERSION AND PROCESSING OF MICRO-AND NANO-CELLULOSIC FIBRES IN PLASTIC PHASE TO MANUFACTURE BIO-NANOCOMPOSITE PRODUCTS OF COMMERCIAL INTEREST
(54) French Title: DISPERSION EN PHASE SOLIDE ET TRAITEMENT DE MICRO ET NANO-FIBRES CELLULOSIQUES EN PHASE PLASTIQUE POUR LA FABRICATION DE PRODUITS BIO-NANOCOMPOSITES D'INTERET COMMERCIAL
(51) International Patent Classification (IPC):
  • C08J 5/04 (2006.01)
  • B29C 47/02 (2006.01)
  • C08J 5/18 (2006.01)
  • C08L 29/04 (2006.01)
  • C08L 71/02 (2006.01)
  • C08L 97/02 (2006.01)
(72) Inventors (Country):
  • SAIN, MOHINI M. (Canada)
(73) Owners (Country):
  • SAIN, MOHINI M. (Canada)
(71) Applicants (Country):
  • SAIN, MOHINI M. (Canada)
(74) Agent: NA
(45) Issued: 2016-12-06
(22) Filed Date: 2006-05-25
(41) Open to Public Inspection: 2007-11-25
Examination requested: 2011-04-06
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract


Plant stem are bundles of cellulose nanofibers with a diameter ranging between
10 to 70
nm and lengths of thousands of nanometers. The mechanical performance of the
cellulose nanofibers is comparable to other engineering materials such as
glass fibers,
carbon fibers etc. In this invention a novel process has been developed to
disperse
cellulosic microfibres and nanofibres in solid phase into a molten plastic
matrix or in a
low viscosity water-based resin system in aqueous phase.
Invention relates to manufacturing Bio-nanocomposites of high performance by
dispersing micro-and nano-cellulosic fibres into plastic matrix using
conventional plastic
processing equipment. This invention also overcomes one unique challenge of
bio-nanocomposite
processing, which is to make them commercially viable by surface
modifying cellulosic micro-and nano-fibres derived from renewable resources.


French Abstract

Les tiges de plantes sont des ensembles de nanofibres de cellulose dun diamètre situé entre 10 et 70 nm et de longueurs de milliers de nanomètres. Le rendement mécanique des nanofibres de cellulose est comparable à celui dautres matériaux dingénierie comme des fibres de verre, des fibres de carbone, etc. Dans la présente invention, un nouveau procédé a été élaboré pour disperser des microfibres et des nanofibres cellulosiques à létat solide dans une matrice de plastique fondu ou dans un système de résine à base deau de faible viscosité en phase aqueuse. Linvention concerne la fabrication de bio-nanocomposites de rendement élevé en dispersant des microfibres et des nanofibres cellulosiques dans une matrice en plastique en utilisant de léquipement de traitement en plastique traditionnel. La présente invention surmonte également un défi unique de la transformation du bio-nanocomposite, qui consiste à les rendre commercialement viables en modifiant la surface de microfibres et de nanofibres dérivées de ressources renouvelables.


Note: Claims are shown in the official language in which they were submitted.

CLAIMS
Claim 1: A process to deposit films from a liquid phase of the cellulosic
micro and
nanofibre obtained from wood, root and nonwood sources, wherein said
cellulosic micro
and/or nanofiber is dispersed uniformly in a plastic which is soluble in the
above liquid
phase, drying the micro-and /or nanofibre film followed by cutting or shaping
the micro-
and/or nanofibre dispersed plastic film into small sized flakes, granules or
pellets and
then further incorporating this micro-and/or nanofibre dispersed plastic in a
molten
thermoplastic by using extrusion, high shear mixing or injection compression
process,
thereby giving a novel process to obtain a bio-nanocomposite product without
any risk of
agglomeration of micro-and /or nanofibers in the plastic matrix during their
melt mixing
process.
Claim 2. A process as cited in claim 1, whereby the liquid phase is selected
from
materials obtained from forest, petroleum and agro-based resources
representing group of
thermoplastics of polyvinyl alcohol, polyolefins, vinyl polymers and
copolymers,
engineered plastics selected from styrene-acrylonitrile copolymer (SAN),
nylon,
polyester, ABS/PC, and bio-based plastics comprising thermoplastic starch,
polylactic
acid (PLA), and poly-hydroxy-alkonates (PHAs).
Claim 3. A process as cited in claim 1, wherein the resulting PVA bio-
nanocomposite
reinforced with soybean stock nanofibers has demonstrated at least 4-5 fold
increase in
tensile strength compared to untreated fibres, whereas PLA nanocomposites
experienced
25% enhancement in tensile strength.
Claim 4. A process as cited in Claim 1 wherein the micro and nano-fibres are
dispersed
in surface active oligomers or polymers.
Claim 5. A process according to Claim 4, characterized in that the surface
active
oligomers or polymers are from the group of styrene copolymers and their
derivatives,
polyethylene glycol ¨maleic anhydride, styrene-maleimide, and ethylene-acrylic

copolymers in soluble liquid phase.
4

Claim 6. A process as cited in Claim 1 wherein the liquid phase dispersed
micro and/or
nano fibrils are incorporated in liquid thermoplastic or thermosetting
polymers.
Claim 7. A process according to Claim 6, characterized in that thermoplastic
or
thermosetting polymers belong to unsaturated polyesters, vinyl esters, epoxy
or polyol-
isocyante resins and in which at least one of the components of these resins
are obtained
from renewable crop sources of soy bean, canola, corn, sunflower, palm, peanut
or any
other oil and their derived chemical precursors.


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Admin Status

Title Date
(22) Filed 2006-05-25
(41) Open to Public Inspection 2007-11-25
Examination Requested 2011-04-06
(45) Issued 2016-12-06

Maintenance Fee

Description Date Amount
Last Payment 2017-05-23 $125.00
Next Payment if small entity fee 2018-05-25 $125.00
Next Payment if standard fee 2018-05-25 $250.00

Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Filing $200.00 2006-05-25
Maintenance Fee - Application - New Act 2 2008-05-26 $50.00 2008-03-19
Reinstatement - failure to complete $200.00 2008-09-11
The completion of the application $200.00 2008-09-11
Maintenance Fee - Application - New Act 3 2009-05-25 $50.00 2009-03-26
Maintenance Fee - Application - New Act 4 2010-05-25 $50.00 2010-03-22
Maintenance Fee - Application - New Act 5 2011-05-25 $100.00 2011-03-15
Request for Examination $400.00 2011-04-06
Maintenance Fee - Application - New Act 6 2012-05-25 $100.00 2012-03-29
Maintenance Fee - Application - New Act 7 2013-05-27 $100.00 2013-03-15
Maintenance Fee - Application - New Act 8 2014-05-26 $100.00 2014-03-14
Maintenance Fee - Application - New Act 9 2015-05-25 $100.00 2015-05-04
Maintenance Fee - Application - New Act 10 2016-05-25 $125.00 2016-05-09
Final $150.00 2016-10-27
Maintenance Fee - Patent - New Act 11 2017-05-25 $125.00 2017-05-23

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Number of pages Size of Image (KB)
Description 2006-05-25 2 81
Cover Page 2007-11-19 1 23
Abstract 2008-09-11 1 39
Claims 2008-09-11 2 95
Abstract 2013-09-12 1 29
Description 2013-09-12 3 134
Claims 2013-09-12 2 54
Abstract 2013-01-21 1 35
Description 2013-01-21 3 137
Claims 2013-01-21 2 58
Abstract 2014-04-10 1 29
Description 2014-04-10 4 160
Claims 2014-04-10 2 64
Abstract 2014-09-11 1 29
Description 2014-09-11 3 136
Claims 2014-09-11 2 63
Abstract 2015-05-06 1 29
Description 2015-05-06 4 157
Claims 2015-05-06 2 64
Claims 2016-05-17 2 61
Description 2016-05-17 3 138
Abstract 2016-05-17 1 29
Abstract 2015-09-14 1 28
Claims 2015-09-14 2 62
Description 2015-09-14 4 153
Abstract 2016-02-02 1 34
Description 2016-02-02 3 137
Claims 2016-02-02 2 64
Cover Page 2016-11-24 1 37
Correspondence 2007-11-29 1 21
Prosecution-Amendment 2011-04-06 1 30
Correspondence 2006-07-14 1 26
Fees 2008-03-19 1 63
Correspondence 2008-09-11 6 248
Fees 2009-03-26 1 61
Fees 2010-03-22 1 60
Fees 2011-03-15 1 64
Prosecution-Amendment 2013-12-03 2 61
Fees 2012-03-29 1 68
Prosecution-Amendment 2012-07-19 3 98
Prosecution-Amendment 2013-01-21 9 310
Correspondence 2013-03-15 1 69
Prosecution-Amendment 2013-03-25 2 81
Prosecution-Amendment 2014-08-11 2 45
Prosecution-Amendment 2013-09-12 9 287
Fees 2014-03-14 1 70
Prosecution-Amendment 2014-04-10 8 302
Prosecution-Amendment 2014-09-11 7 262
Prosecution-Amendment 2015-01-15 3 219
Fees 2015-05-04 1 69
Prosecution-Amendment 2015-05-06 8 290
Correspondence 2015-06-12 1 29
Prosecution-Amendment 2015-08-06 3 189
Prosecution-Amendment 2015-09-14 9 305
Prosecution-Amendment 2015-12-14 3 190
Prosecution-Amendment 2016-02-02 8 286
Prosecution-Amendment 2016-03-22 3 207
Fees 2016-05-09 1 69
Prosecution-Amendment 2016-05-17 8 279
Correspondence 2016-10-27 2 88
Fees 2017-05-23 1 66