Crosslinking agent, crosslinked polymer, and compound

Patent metadata

Field	Value
Publication number	US-9809697-B2
Application number	US-201415027773-A
Country	US
Kind code	B2
Filing date	Oct 8, 2014
Priority date	Oct 9, 2013
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

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

The invention claimed is:

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

in which R 1 represents an alkyl group having 1-10 carbon atoms, and the symbol * is a linking bond; and
a polymer having carbonyl groups.

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

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

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

in which 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 crosslinkable composition according to claim 1 , wherein the polymer is a polyvinyl alcohol-based resin.

6. A crosslinked polymer produced by crosslinking the crosslinkable composition according to claim 5 .

7. A method for preparing a crosslinkable composition comprising combining
a compound which contains two or more alkylhydrazide groups represented by the following formula (1):

in which R 1 represents an alkyl group having 1-10 carbon atoms, and the symbol * is a linking bond with
a polymer comprising carbonyl groups.

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

• C08L101/06

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

• C07C243/28

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

• C08L29/04

  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