Crosslinking agent, crosslinked polymer, and compound

Patent metadata

Field	Value
Publication number	US-2016237245-A1
Application number	US-201415027773-A
Country	US
Kind code	A1
Filing date	Oct 8, 2014
Priority date	Oct 9, 2013
Publication date	Aug 18, 2016
Grant date	—

Abstract

An object of the invention is to provide a crosslinking agent with which a crosslinked polymer that suffers little coloring with the lapse of time and shows excellent viscosity stability is obtained. The crosslinking agent of the invention includes a compound which contains two or more alkylhydrazide groups represented by the following general formula (1).

(In formula (1), R 1 represents an alkyl group having 1-10 carbon atoms, and symbol * is a linking bond.)

First claim

1 . A crosslinking agent comprising a compound which contains two or more alkylhydrazide groups represented by the following general formula (1):

(In formula (1), R 1 represents an alkyl group having 1-10 carbon atoms, and symbol * is a linking bond.)

2 . The crosslinking agent according to claim 1 , wherein the compound has a solubility in 100 g of water of 50-500 g at 23° C.

3 . The crosslinking agent according to claim 1 , wherein the compound has a molecular weight of 150-3,000.

4 . The crosslinking agent according to claim 1 , wherein the compound is a dicarboxylic acid bis(1-alkylhydrazide) compound represented by the following general formula (1a):

(In formula (1a), R 1 and R 2 each independently represent an alkyl group having 1-10 carbon atoms, and X represents a single bond or an alkylene chain having 1-10 carbon atoms.)

5 . The crosslinking agent according to claim 1 , which is for use in crosslinking a polymer having carbonyl groups.

6 . The crosslinking agent according to claim 5 , wherein the polymer is a polyvinyl alcohol-based resin.

7 . A crosslinked polymer produced by crosslinking a polyvinyl alcohol-based resin with the crosslinking agent according to claim 1 .

8 . A compound which contains two or more alkylhydrazide groups represented by the following general formula (1):

(In formula (1), R 1 represents an alkyl group having 1-10 carbon atoms, and symbol * is a linking bond.)

Assignees

• Nippon Synthetic Chem Ind Co Ltd

Inventors

• Furo Chizuko
• Kanda Taiji
• Mandai Shusaku
• Kuroda Takeshi

Classifications

• C08K5/25 Primary

  Carboxylic acid hydrazides · CPC title

• C07C243/28

  to hydrogen atoms or to carbon atoms of a saturated carbon skeleton · CPC title

• C08J2329/04

  Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids · CPC title

• C08J3/242

  Applying crosslinking or accelerating agent onto compounding ingredients such as fillers, reinforcements · CPC title

• C08L101/06

  containing oxygen atoms {(C08L101/025 takes precedence)} · CPC title