Crosslinking agent, crosslinked polymer, and uses thereof

• US 8,426,632 B2
• Filed: 08/29/2008
• Issued: 04/23/2013
• Est. Priority Date: 08/31/2007
• Status: Active Grant

• Current Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Original Assignee: Nippon Synthetic Chemical Industry Company Limited (Mitsubishi Chemical Group Corp.)
• Inventors: Tanaka, Shinichi, Kageyama, Hideki, Ono, Hiroyuki, Kuruma, Akiko
• Primary Examiner(s): Zucker, Paul A
• Application Number:
  US12/675,567
• Publication Number:
  US 20100209723A1
• Time in Patent Office: 1,698 Days
• Field of Search: None
• US Class Current: 560/178
• CPC Class Codes: B41M 2205/04 Direct thermal recording [DTR]
• CPC Class Codes: B41M 2205/40 Cover layers; Layers separated from substrate by imaging layer; Protective layers; Layers applied before imaging
• CPC Class Codes: B41M 5/3372 Macromolecular compounds
• CPC Class Codes: B41M 5/3375 Non-macromolecular compounds
• CPC Class Codes: B41M 5/44 characterised by the macromolecular compounds
• CPC Class Codes: C08K 5/098 Metal salts of carboxylic acids
• CPC Class Codes: C08K 5/10 Esters; Ether-esters
• CPC Class Codes: C08K 5/101 of monocarboxylic acids
• CPC Class Codes: C08L 29/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• CPC Class Codes: C08L 61/06 of aldehydes with phenols
• CPC Class Codes: C09J 129/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• CPC Class Codes: G02B 5/30 Polarising elements light-modulating devices with active elements G02F1/00
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

There is provided a novel crosslinking agent for use in crosslinked polymer fabrication, specifically a crosslinking agent containing at least one compound selected from glyoxylate and a glyoxylic acid ester derivative represented by the following general formula (1):

wherein R¹ and R² each independently represents an alkyl group having 1 to 10 carbon atoms and R³ represents hydrogen or an alkyl group having 1 to 10 carbon atoms.

Claims

1. A composition for forming an acetoacetyl group-containing resin comprising at least one metal salt of glyoxylic acid and at least one acetoacetyl group-containing linear polymer.

2. The crosslinking agent according to claim 1, wherein the metal salt of glyoxylic acid is at least one metal salt of glyoxylic acid selected from an alkali metal salt of glyoxylic acid and an alkaline earth metal salt of glyoxylic acid.

3. An aqueous emulsion composition comprising an acetoacetyl group-containing polyvinyl alcohol-based resin as a dispersant, a polymer containing a repeating structural unit derived from an ethylenically unsaturated monomer as a dispersoid, and the crosslinking agent according to claim 1.

4. An aqueous emulsion composition comprising an acetoacetyl group-containing resin as a dispersoid and the crosslinking agent according to claim 1.