Strengthening resins for paper products

Patent metadata

Field	Value
Publication number	US-9689114-B2
Application number	US-201514820580-A
Country	US
Kind code	B2
Filing date	Aug 7, 2015
Priority date	Aug 7, 2014
Publication date	Jun 27, 2017
Grant date	Jun 27, 2017

Abstract

Resin compositions, products made therewith, and methods for making such resin compositions and products. The resin composition can include a polyamide-epihalohydrin resin, a cationic styrene maleimide resin, and a urea-formaldehyde resin. The polyamide-epihalohydrin resin can include a reaction product of a polyamidoamine and an epihalohydrin. The cationic styrene maleimide resin can include a reaction product of a styrene maleic anhydride copolymer and an amine compound. The product can include a fiber web and an at least partially cured resin composition. The resin composition, prior to curing, can include a polyamide-epihalohydrin resin, a cationic styrene maleimide resin, and a urea-formaldehyde resin. The polyamide-epihalohydrin resin can include a reaction product of a polyamidoamine and an epihalohydrin. The cationic styrene maleimide resin can include a reaction product of a styrene maleic anhydride copolymer and an amine compound.

First claim

What is claimed is:

1. A resin composition, comprising:
a polyamide-epihalohydrin resin comprising a reaction product of a polyamidoamine and an epihalohydrin;
a cationic styrene maleimide resin comprising a reaction product of a styrene maleic anhydride copolymer and an amine compound; and
a urea-formaldehyde resin.

2. The resin composition of claim 1 , wherein the cationic styrene maleimide resin has a weight average molecular weight of about 3,000 to about 200,000, and a styrene to maleimide molar ratio of about 1:1 to about 5:1.

3. The resin composition of claim 1 , wherein the urea-formaldehyde resin has a weight average molecular weight of about 2,000 to about 500,000, and a formaldehyde to urea molar ratio of about 0.5:1 to about 1.2:1.

4. The resin composition of claim 1 , wherein the resin composition comprises about 10 wt % to about 80 wt % of the polyamide-epihalohydrin resin, based on a combined solids weight of the polyamide-epihalohydrin resin, the cationic styrene maleimide resin, and the urea-formaldehyde resin.

5. The resin composition of claim 1 , wherein the resin composition comprises about 10 wt % to about 80 wt % of the cationic styrene maleimide resin, based on a combined solids weight of the polyamide-epihalohydrin resin, the cationic styrene maleimide resin, and the urea-formaldehyde resin.

6. The resin composition of claim 1 , wherein the resin composition comprises about 10 wt % to about 80 wt % of the urea-formaldehyde resin, based on a combined solids weight of the polyamide-epihalohydrin resin, the cationic styrene maleimide resin, and the urea-formaldehyde resin.

7. The resin composition of claim 1 , wherein the cationic styrene maleimide resin has a weight average molecular weight of about 4,000 to about 150,000, and wherein the resin composition comprises about 25 wt % to about 70 wt % of the cationic styrene maleimide resin, based on a combined solids weight of the polyamide-epihalohydrin resin, the cationic styrene maleimide resin, and the urea-formaldehyde resin.

8. The resin composition of claim 1 , wherein the resin composition comprises about 15 wt % to about 70 wt % of the cationic styrene maleimide resin, about 15 wt % to about 70 wt % of the polyamide-epihalohydrin resin, and about 15 wt % to about 70 wt % of the urea-formaldehyde resin, wherein all weight percent values are based on a combined solids weight of the cationic styrene maleimide resin, the polyamide-epihalohydrin resin, and the urea-formaldehyde resin.

9. The resin composition of claim 1 , wherein the cationic styrene maleimide resin comprises one or more copolymers of styrene and dimethylaminopropylamine maleimide acetate.

10. The resin composition of claim 1 , wherein the cationic styrene maleimide resin has the chemical formula:

wherein:
R + is a cationic molecular group;
A − is an anion;
m is an integer of 1 to about 5; and
n is an integer of about 5 to about 800.

11. The resin composition of claim 10 , wherein the cationic molecular group is a cationic ammonium group, wherein the anion is a carboxylate, and the carboxylate is an acetate anion, a citrate anion, an oxalate anion, a lactate anion, a formate anion, or any mixture thereof.

12. The resin composition of claim 1 , wherein the resin composition comprises about 16 wt % to about 42 wt % of the cationic styrene maleimide resin, about 16 wt % to about 42 wt % of the polyamide-epihalohydrin resin, and about 16 wt % to about 42 wt % of the urea-formaldehyde resin, wherein all weight percent values are based on a combined solids weight of the cationic styrene maleimide resin, the polyamide-epihalohydrin resin, and the urea-formaldehyde resin.

13. The resin composition of claim 1 , wherein the cationic styrene maleimide resin has the chemical formula:

wherein:
R 1 is a substituted or unsubstituted organic diyl group;
R 2 , R 3 , and R 4 are independently selected from a hydrogen or a substituted or unsubstituted, linear or branched, cyclic, heterocyclic, or aromatic hydrocarbyl group;
A − is an anion;
m is an integer of 1 to about 5; and
n is an integer of about 5 to about 800.

14. The resin composition of claim 1 , wherein the cationic styrene maleimide resin has the chemical formula:

wherein:
A − is an anion; and
n 1 , n 2 , and n 3 are independently an integer of about 5 to about 800.

15. The resin composition of claim 14 , wherein the anion is a carboxylate, wherein n 1 is about 5 to about 100, n 2 is about 20 to about 200, and n 3 is about 50 to about 300.

16. The resin composition of claim 1 , further comprising a plurality of fibers.

17. A resin composition, comprising:
about 10 wt % to about 70 wt % of a polyamide-epihalohydrin resin comprising a reaction product of a polyamidoamine and an epihalohydrin;
about 10 wt % to about 70 wt % of a cationic styrene maleimide resin comprising a reaction product of a styrene maleic anhydride copolymer and an amine compound and having a styrene to maleimide molar ratio of about 1:1 to about 5:1; and
about 10 wt % to about 70 wt % of a urea-formaldehyde resin having a formaldehyde to urea molar ratio of about 0.5:1 to about 1.2:1, wherein all weight percent values are based on a combined solids weight of the polyamide-epihalohydrin resin, the cationic styrene maleimide resin, and the urea-formaldehyde resin.

18. The resin composition of claim 17 , wherein the resin composition comprises about 16 wt % to about 42 wt % of the cationic styrene maleimide resin, about 16 wt % to about 42 wt % of the polyamide-epihalohydrin resin, and about 16 wt % to about 42 wt % of the urea-formaldehyde resin, wherein all weight percent values are based on a combined solids weight of the cationic styrene maleimide resin, the polyamide-epihalohydrin resin, and the urea-formaldehyde resin.

19. A fiber product, comprising:
a fiber web; and
an at least partially cured resin composition, wherein, prior to curing, the resin composition comprises:
a polyamide-epihalohydrin resin comprising a reaction product of a polyamidoamine and an epihalohydrin;
a cationic styrene maleimide resin comprising a reaction product of a styrene maleic anhydride copolymer and an amine compound; and
a urea-formaldehyde resin.

20. The fiber product of claim 19 , wherein the fiber product has a dry tensile strength of about 1 kN/m to about 6 kN/m, a wet tensile strength of about 0.1 kN/m to about 1 kN/m, and a wet-to-dry tensile strength ratio of about 10 to about 20.

Assignees

• Georgia Pacific Chemicals Llc

Inventors

• Ringold Clay E
• Hagiopol Cornel
• Johnston James W
• Potter Frederick S

Classifications

• C08L25/08

  Copolymers of styrene (C08L29/08, C08L35/06, C08L55/02 take precedence) · CPC title

• C08G73/0286

  Preparatory process from polyamidoamines and epihalohydrins · CPC title

• C08L45/00

  Compositions of homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic ring system; Compositions of derivatives of such polymers (of cyclic anhydrides or imides C08L35/00; of cyclic esters of polyfunctional acids C08L31/00) · CPC title

• D21H17/55

  Polyamides; Polyaminoamides; Polyester-amides · CPC title

• C08L61/24

  with urea or thiourea · CPC title