Papermaking chemical, method for manufacturing same, and paper containing same

• US 20050272889A1
• Filed: 02/21/2003
• Published: 12/08/2005
• Est. Priority Date: 02/22/2002
• Status: Active Grant

• Current Assignee: Seiko PMC Corporation (DIC Corporation)
• Original Assignee: Seiko PMC Corporation (DIC Corporation)
• Inventors: Ogawa, Masatomi, Iwata, Satoru, Endou, Akira, Kiyosada, Toshitsugu
• Granted Patent: US 7,482,417 B2
• Time in Patent Office: Days
• US Class Current: 526/287
• CPC Class Codes: C08F 20/60 containing nitrogen in addition to the carbonamido nitrogen
• CPC Class Codes: C08F 220/56 Acrylamide; Methacrylamide
• CPC Class Codes: C08F 226/02 by a single or double bond to nitrogen
• CPC Class Codes: C08F 26/02 by a single or double bond to nitrogen
• CPC Class Codes: D21H 17/375 Poly(meth)acrylamide
• CPC Class Codes: D21H 17/455 comprising tertiary amine or being at least partially quaternised
• CPC Class Codes: Y10T 428/1462 Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof [e.g., acrylamide, acrylate ester, etc.]

Abstract

A novel (meth)acrylamide polymer capable of forming a papermaking chemical exhibiting an excellent paper strengthening effect, drainage improvement effect, retention improvement effect, plybond strength enhancing effect, surface strength enhancing effect, and sizing improvement effect in acid, neutral, or alkaline papermaking systems, as well as a method for manufacturing this polymer, and paper that makes use of this polymer and has excellent bursting strength, internal bond strength, and other such properties is provided. This is a (meth)acrylamide polymer produced by polymerizing a monomer (a) expressed by the following general formula 1, the following monomer (b), and the following monomer (c):
(a) general formula 1: (b) a (meth)acrylamide; (c) an ionic monomer other than monomer (a) expressed by general formula 1 above

Claims

1-11. -11. (canceled)

12. A papermaking chemical containing a (meth)acrylamide polymer, produced by polymerizing a monomer (a) expressed by the following general formula 1, the following monomer (b), and the following monomer (c):

(a) general formula 1;

(where R¹ is a C₁ to C₄ alkylene group, R² to R⁴ are each a hydrogen atom or C₂₂ or lower alkyl group that may have a substituent (two or three of R² to R⁴ may not be hydrogen atoms), and X−

is an anion of an inorganic acid or an organic acid);

(b) a (meth)acrylamide;

(c) an ionic monomer other than monomer (a) expressed by general formula 1 above.

14. The method for manufacturing the papermaking chemical containing a (meth)acrylamide polymer according to claim 12, wherein at least one member selected from the group consisting of the monomer (a), monomer (b), and monomer (c) is polymerized, and the remaining monomers are added during this polymerization.

18. The papermaking chemical, containing a (meth)acrylamide polymer according to claim 12, wherein the polymerization is conducted in the presence of a urea compound.

19. The method for manufacturing a papermaking chemical containing a (meth)acrylamide polymer according to claim 14, wherein the polymerization is conducted in the presence of a urea compound.

20. The papermaking chemical, wherein the papermaking chemical containing a (meth)acrylamide polymer according to claim 12, is a paper strength agent.

21. Paper containing the papermaking chemical according to claim 20.

28. The papermaking chemical, wherein the papermaking chemical containing a (meth)acrylamide polymer according to claim 18 is a paper strength agent.

13. A papermaking chemical containing a (meth)acrylamide polymer, produced by polymerizing a monomer (a) expressed by the following general formula 1, the following monomer (b), the following monomer (c), and a crosslinking agent (d):

(a) general formula 1

(where R¹ is a C₁ to C₄ alkylene group, R² to R⁴ are each a hydrogen atom or C₂₂ or lower alkyl group that may have a substituent (two or three of R² to R may not be hydrogen atoms), and X−

is an anion of an inorganic acid or an organic acid);

(b) a (meth)acrylamide;

(c) an ionic monomer other than monomer (a) expressed by general formula 1 above.

15. The method for manufacturing the papermaking chemical containing a (meth)acrylamide polymer according to claim 13, wherein at least one member selected from the group consisting of the monomer (a), monomer (b), monomer (c), and crosslinking agent (d) is polymerized, and the remaining monomers are added during this polymerization.

22. The papermaking chemical containing a (meth)acrylamide polymer according to claim 13, wherein the polymerization is conducted in the presence of a urea compound.

24. The method for manufacturing a papermaking chemical containing a polymer according to claim 15, wherein the polymerization is conducted in the presence of a urea compound.

26. The papermaking chemical, wherein the papermaking chemical containing a (meth)acrylamide polymer according to claim 13 is a paper strength agent.

16. A papermaking chemical, containing a (meth)acrylamide polymer produced by polymerizing a monomer (a) expressed by the following general formula 1, the following monomer (b), the following monomer (c1), the following monomer (c2), and a crosslinking agent (d):

17. The method for manufacturing the papermaking chemical containing a (meth)acrylamide polymer according to claim 16, wherein at least one member selected from the group consisting of the monomer (a), monomer (b), monomer (c1), monomer (c2), and crosslinking agent (d) is polymerized, and the remaining monomers are added during this polymerization.

23. The papermaking chemical containing a (meth)acrylamide polymer according to claim 16, wherein the polymerization is conducted in the presence of a urea compound.

25. The method for manufacturing a papermaking chemical containing a polymer according to claim 17, wherein the polymerization is conducted in the presence of a urea compound.

27. The papermaking chemical, wherein the papermaking chemical containing a (meth)acrylamide polymer according to claim 16 is a paper strength agent.