Cross-linking compound and polymer using the same

Patent metadata

Field	Value
Publication number	US-12152125-B2
Application number	US-202017271802-A
Country	US
Kind code	B2
Filing date	Jun 8, 2020
Priority date	Jun 10, 2019
Publication date	Nov 26, 2024
Grant date	Nov 26, 2024

Abstract

The present disclosure relates to a novel cross-linking compound and a polymer using the same. More particularly, the present disclosure relates to a novel cross-linking compound that does not cause thermal decomposition at one end and thus prevents in advance the generation of volatile substances and decomposition products, and a polymer prepared using the same.

First claim

The invention claimed is:

1. A cross-linking compound represented by the following Chemical Formula 1:

wherein in the Chemical Formula 1,
R1 and R2 are each independently hydrogen,
R3 and R4 are methyl,
R5 and R6 are each independently hydrogen,
X is S, and
n is 2.

2. A polymer comprising the cross-linking compound of claim 1 and an acrylic acid-based monomer, wherein the cross-linking compound of claim 1 and the acrylic acid-based monomer are polymerized.

3. The polymer of claim 2 ,
wherein the acrylic acid-based monomer is represented by the following Chemical Formula 2:
R—COOM  [Chemical Formula 2]

wherein in the Chemical Formula 2,
R is an alkyl group having 2 to 5 carbon atoms and containing an unsaturated bond, and M is a hydrogen atom, a monovalent or divalent metal, an ammonium group or an organic amine salt.

4. The cross-linking compound of claim 1 , wherein Chemical Formula 1 is used as a crosslinking agent during polymerization with an acrylic acid-based monomer in preparing a super absorbent polymer.

5. The cross-linking compound of claim 1 , wherein one end of the cross-linking compound represented by Chemical Formula 1 includes an acrylate or an acrylate end that is decomposed by heat, and another end of the cross-linking compound includes an alkenyl or an alkenyl end that is not decomposed by heat.

6. The cross-linking compound of claim 5 , wherein the acrylate end is thermally decomposed upon heating and the alkenyl end the decomposition of the cross-linking compound does not occur for preventing generation of odors when used in a super absorbent polymer.

Assignees

• Lg Chemical Ltd

Inventors

• Lim Won Taeck
• Choi Wonmun
• Kim Yongjin
• Kim Gicheul
• Kim Ki Hyun

Classifications

• C08K5/372

  Sulfides {, e.g. R-(S)x-R'} · CPC title

• C08F120/06

  Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof · CPC title

• C08F2810/20

  leading to a crosslinking, either explicitly or inherently · CPC title

• C08K5/0016

  Plasticisers · CPC title

• C07C323/12

  the carbon skeleton being acyclic and saturated · CPC title