US5003022A
Expired / Lapsed
US
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Starch graft polymers
Assignee: Penford Products Co LLC
•
Filing: 1990-02-05
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Granted: 1991-03-26
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Expires: 2010-02-05
Abstract
Abstract A stable aqueous polymeric dispersion comprising a graft copolymer of thinned, gelatinized starch and one or more vinyl grafting monomers, the vinyl monomers including at least 10% by weight 1,3-butadiene is disclosed. Also disclosed are paper coating color compositions comprising the polymeric dispersions and pigments and improved high gloss papers coated with the coating color compositions.
Inventors
- 👤 Charles C. Nguyen
- 👤 Verne J. Martin
- 👤 Edward P. Pauley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:45
CPC Classifications
C; C08; C08F; C08F251/00; C09; C09D; C09D151/00; C09D151/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31971; Y10T428/31975; Y10T428/31978; Y10T428/31982
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
78 words
A stable aqueous polymeric dispersion comprising at least 20% by weight of solids comprising a graft copolymer which is the reaction product of a thinned, gelatinized starch and one or more vinyl grafting monomers, said grafting monomer(s) comprising at least 10% 1,3-butadiene by weight with a grafting monomer to starch ratio of between about 2:10 and about 23:10, the weight ratio of extractable grafting monomer(s) and polymers thereof to unextractable solids comprising grafted starch being 0.2 or less.
Claim 2
Dependent Claim
78 words
A stable aqueous polymeric dispersion comprising at least 20% by weight of solids comprising a graft copolymer which is the reaction product of a thinned, gelatinized starch and one or more vinyl grafting monomers, said grafting monomer(s) comprising at least 10% 1,3-butadiene by weight with a grafting monomer to starch ratio of between about 2:10 and about 23:10, the weight ratio of extractable grafting monomer(s) and polymers thereof to unextractable solids comprising grafted starch being 0.2 or less.
Claim 3
Dependent Claim
10 words
The dispersion of claim 1 which is substantially coagulum free.
Claim 4
Dependent Claim
22 words
The dispersion of claim 1 wherein said grafting monomers comprise a second vinyl monomer other than 1,3-butadiene in addition to said 1,3-butadiene.
Claim 5
Dependent Claim
17 words
The dispersion of claim 3 wherein said grafting monomers comprise up to about 70% 1,3-butadiene by weight.
Claim 6
Dependent Claim
43 words
The dispersion of claim 3 wherein said second vinyl monomer is selected from the group consisting of methyl methacrylate, vinyl acetate, acrylonitrile, acrylic acid, acrylamide, maleic anhydride, monovinyl silicon compounds, ethyl vinyl ether, chlorostyrene, vinyl pyridine, vinylidene chloride, butyl vinyl ether and styrene.
Claim 7
Dependent Claim
24 words
The dispersion of claim 3 wherein said second vinyl monomer is selected from the group consisting of vinylidene chloride, butyl vinyl ether and styrene.
Claim 8
Dependent Claim
12 words
The dispersion of claim 3 wherein said second vinyl monomer is styrene.
Claim 9
Dependent Claim
14 words
The dispersion of claim 1 wherein said thinned starch is a hydroxyethyl starch ether.
Claim 10
Dependent Claim
16 words
The dispersion of claim 1 wherein said thinned starch is an underivatized unmodified enzyme thinned starch.
Claim 11
Dependent Claim
16 words
The dispersion of claim 1 wherein said monomer to starch weight ratio is at least 5:10.
Claim 12
Dependent Claim
26 words
The dispersion of claim 1 wherein said weight ratio of extractable grafting monomer(s) and polymers thereof to unextractable solids comprising grafted starch is 0.1 or less.
Claim 13
Dependent Claim
12 words
The dispersion of claim 1 comprising at least 30% solids by weight
Claim 14
Dependent Claim
20 words
The dispersion of claim 1 wherein said thinned starch is characterized by an intrinsic viscosity of less than 0.12 dl/g.
Claim 15
Dependent Claim
86 words
The dispersion of claim 7 comprising at least 30% solids by weight wherein said grafting monomers comprise from about 20% to about 40% 1,3-butadiene and from about 60% to about 80% styrene, said grafting monomer to starch ratio is between about 6:10 and 8:10, said thinned starch is an enzyme thinned hydroxyethyl starch ether characterized by an intrinsic viscosity of less than 0.12 dl/g and wherein said weight ratio of extractable grafting monomer(s) and polymers thereof to unextractable solids comprising grafted starch is 0.1 or less.
Claim 16
Dependent Claim
15 words
The dispersion of claim 1 wherein said 1,3-butadiene comprises substantially 100% of said grafting monomer.
Claim 17
Independent Claim
143 words
A method for the production of a stable aqueous polymeric dispersion comprising at least 20% by weight of solids comprising a graft copolymer of a thinned, gelatinized starch and one or more vinyl grafting monomers, said vinyl grafting monomers comprising at least 10% 1,3-butadiene by weight, said method comprising the steps of: forming a reaction mixture comprising a thinned, gelatinized starch and one or more vinyl grafting monomers, said vinyl monomers comprising at least 10% 1,3-butadiene by weight, said mixture comprising a weight ratio of between about 2:10 and about 23:10 grafting monomer to starch; and reacting said reaction mixture under elevated pressure, in the presence of a suitable initiator and for a period of time sufficient to yield said dispersion characterized by a weight ratio of extractable grafting monomer(s) and polymers thereof to unextractable solids comprising grafted starch of 0.2 or less.
Claim 18
Independent Claim
143 words
A method for the production of a stable aqueous polymeric dispersion comprising at least 20% by weight of solids comprising a graft copolymer of a thinned, gelatinized starch and one or more vinyl grafting monomers, said vinyl grafting monomers comprising at least 10% 1,3-butadiene by weight, said method comprising the steps of: forming a reaction mixture comprising a thinned, gelatinized starch and one or more vinyl grafting monomers, said vinyl monomers comprising at least 10% 1,3-butadiene by weight, said mixture comprising a weight ratio of between about 2:10 and about 23:10 grafting monomer to starch; and reacting said reaction mixture under elevated pressure, in the presence of a suitable initiator and for a period of time sufficient to yield said dispersion characterized by a weight ratio of extractable grafting monomer(s) and polymers thereof to unextractable solids comprising grafted starch of 0.2 or less.
Claim 19
Dependent Claim
22 words
The method of claim 16 wherein said grafting monomers comprise a second vinyl monomer other than 1,3-butadiene in addition to said 1,3-butadiene.
Claim 20
Dependent Claim
23 words
The method of claim 16 wherein at least a portion of said grafting reaction takes place at a pressure greater than 25 psig.
Claim 21
Dependent Claim
19 words
The method of claim 16 wherein said initiator is selected from the group consisting of persulfate and peroxide initiators.
Claim 22
Dependent Claim
12 words
The method of claim 16 wherein said initiator is a persulfate initiator.
Claim 23
Dependent Claim
20 words
The method of claim 16 wherein said thinned starch is characterized by an intrinsic viscosity of less than 0.12 dl/g.
Claim 24
Dependent Claim
26 words
The method of claim 16 wherein said weight ratio of extractable grafting monomer(s) and polymers thereof to unextractable solids comprising grafted starch is 0.1 or less.
Claim 25
Dependent Claim
83 words
The method of claim 17 wherein said grafting monomers comprise from about 20% to about 40% 1,3-butadiene and from about 60% to about 80% styrene, said grafting monomer to starch ratio is from about 6:10 to about 8:10, said thinned starch is an enzyme thinned hydroxyethyl starch ether characterized by an intrinsic viscosity of less than 0.12 dl/g, and wherein at least a portion of said grafting reaction takes place at a pressure greater than 25 psig and said initiator is potassium persulfate.
Claim 26
Dependent Claim
15 words
The method of claim 16 wherein said 1,3-butadiene comprises substantially 100% of said grafting monomer.
Claim 27
Dependent Claim
16 words
A coating color composition comprising a pigment and a binder comprising the dispersion of claim 1.
Claim 28
Dependent Claim
24 words
The coating color composition of claim 25 wherein said dispersion comprises thinned, gelatinized starch characterized by an intrinsic viscosity of less than 0.12 dl/g.
Claim 29
Dependent Claim
29 words
A method for coating a substrate comprising the steps of applying to said substrate the coating color composition of claim 26 to form a coating and drying said coating.
Claim 30
Dependent Claim
11 words
The method according to claim 27 wherein said substrate is paper.
Claim 31
Dependent Claim
14 words
Paper coated with a coating color composition according to the method of claim 28.
Claim 32
Dependent Claim
69 words
A coating color composition comprising a pigment and a binder comprising a stable aqueous polymeric dispersion comprising at least 20% by weight solids comprising a graft copolymer of a thinned, gelatinized starch and one or more vinyl grafting monomers with a grafting monomer to starch weight ratio of between about 2:10 and about 23:10 wherein said thinned starch is characterized by an intrinsic viscosity of less than 0.12 dl/g.
Claim 33
Dependent Claim
69 words
A coating color composition comprising a pigment and a binder comprising a stable aqueous polymeric dispersion comprising at least 20% by weight solids comprising a graft copolymer of a thinned, gelatinized starch and one or more vinyl grafting monomers with a grafting monomer to starch weight ratio of between about 2:10 and about 23:10 wherein said thinned starch is characterized by an intrinsic viscosity of less than 0.12 dl/g.
Claim 34
Dependent Claim
20 words
The coating color composition according to claim 30 wherein said vinyl grafting monomers comprise at least 10% 1,3-butadiene by weight.
Claim 35
Dependent Claim
28 words
A method of coating paper comprising the steps of applying to said paper the coating color composition of claim 30 to form a coating and drying said coating.
Claim 36
Dependent Claim
25 words
The method of coating paper according to claim 32 wherein the vinyl grafting monomers of said coating composition comprise at least 10% 1,3-butadiene by weight.
Claim 37
Dependent Claim
125 words
A stable polymeric dispersion comprising at least 20% by weight of solids prepared by the method comprising the steps of: forming a reaction mixture comprising a thinned, gelatinized starch and one or more vinyl monomers, said vinyl monomers comprising at least 10% 1,3-butadiene by weight, said mixture comprising a weight ratio of vinyl monomers to starch of between about 2:10 and about 23:10; and reacting said reaction mixture under elevated pressure, in the presence of one or more initiators selected from the group consisting of persulfate and peroxide initiators; said reacting step being conducted for a period of time sufficient to yield said dispersion characterized by a weight ratio of extractable vinyl monomer(s) and polymers thereof to unextractable solids comprising starch of 0.2 or less.
Claim 38
Dependent Claim
125 words
A stable polymeric dispersion comprising at least 20% by weight of solids prepared by the method comprising the steps of: forming a reaction mixture comprising a thinned, gelatinized starch and one or more vinyl monomers, said vinyl monomers comprising at least 10% 1,3-butadiene by weight, said mixture comprising a weight ratio of vinyl monomers to starch of between about 2:10 and about 23:10; and reacting said reaction mixture under elevated pressure, in the presence of one or more initiators selected from the group consisting of persulfate and peroxide initiators; said reacting step being conducted for a period of time sufficient to yield said dispersion characterized by a weight ratio of extractable vinyl monomer(s) and polymers thereof to unextractable solids comprising starch of 0.2 or less.
Claim 39
Dependent Claim
10 words
The dispersion of claim 34 which is substantially coagulum free.
Claim 40
Dependent Claim
22 words
The dispersion of claim 34 wherein said vinyl monomers comprise a second vinyl monomer other than 1,3-butadiene in addition to said 1,3-butadiene.
Claim 41
Dependent Claim
17 words
The dispersion of claim 36 wherein said vinyl monomers comprise up to about 70% 1,3-butadiene by weight.
Claim 42
Dependent Claim
43 words
The dispersion of claim 36 wherein said second vinyl monomer is selected from the group consisting of methyl methacrylate, vinyl acetate, acrylonitrile, acrylic acid, acrylamide, maleic anhydride, monovinyl silicon compounds, ethyl vinyl ether, chlorostyrene, vinyl pyridine, vinylidene chloride, butyl vinyl ether and styrene.
Claim 43
Dependent Claim
24 words
The dispersion of claim 36 wherein said second vinyl monomer is selected from the group consisting of vinylidene chloride, butyl vinyl ether and styrene.
Claim 44
Dependent Claim
12 words
The dispersion of claim 36 wherein said second vinyl monomer is styrene.
Claim 45
Dependent Claim
14 words
The dispersion of claim 34 wherein said thinned starch is a hydroxyethyl starch ether.
Claim 46
Dependent Claim
16 words
The dispersion of claim 34 wherein said thinned starch is an underivatized unmodified enzyme thinned starch.
Claim 47
Dependent Claim
17 words
The dispersion of claim 34 wherein said vinyl monomer to starch weight ratio of at least 5:10.
Claim 48
Dependent Claim
25 words
The dispersion of claim 34 wherein said weight ratio of extractable vinyl monomer(s) and polymers thereof to unextractable solids comprising starch is 0.1 or less.
Claim 49
Dependent Claim
12 words
The dispersion of claim 34 comprising at least 30% solids by weight.
Claim 50
Dependent Claim
20 words
The dispersion of claim 34 wherein said thinned starch is characterized by an intrinsic viscosity of less than 0.12 dl/g.
Claim 51
Dependent Claim
22 words
The dispersion of claim 34 wherein at least a portion of said reaction takes place at a pressure greater than 25 psig.
Claim 52
Dependent Claim
86 words
The dispersion of claim 40 comprising at least 30% solids by weight wherein said vinyl monomers comprise from about 20% to about 40% 1,3-butadiene and from about 60% to about 80% styrene, said vinyl monomer to starch ratio is between about 6:10 and about 8:10, said thinned starch is an enzyme thinned hydroxyethyl starch ether characterized by an intrinsic viscosity of less than 0.12 dl/g and wherein said weight ratio of extractable vinyl monomer(s) and polymers thereof to unextractable solids comprising starch is 0.1 or less.
Claim 53
Dependent Claim
15 words
The dispersion of claim 34 wherein said 1,3-butadiene comprises substantially 100% of said vinyl monomer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-03-25 | 1994-09-24 | 1995-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-03-25 | 1998-09-24 | 1999-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-03-25 | 2002-09-24 | 2003-03-26 | $7700.00 | Window Closed / Lapsed |