Chlorinated vinyl chloride resin composition and chlorinated vinyl chloride resin molded body

Patent metadata

Field	Value
Publication number	US-12428542-B2
Application number	US-202017636201-A
Country	US
Kind code	B2
Filing date	Aug 28, 2020
Priority date	Aug 30, 2019
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

The present invention provides a chlorinated polyvinyl chloride resin composition capable of providing a molded article that is excellent in discoloration resistance and corrosion resistance and is not likely to cause environmental pollution as the amount of metal leached therefrom is small, and a chlorinated polyvinyl chloride resin molded article. The present invention relates to a chlorinated polyvinyl chloride resin composition containing: a chlorinated polyvinyl chloride resin; a thermal stabilizer; and at least one thioglycolic acid compound selected from the group consisting of thioglycolic acid and thioglycolic acid esters.

First claim

The invention claimed is:

1. A chlorinated polyvinyl chloride resin composition comprising:
a chlorinated polyvinyl chloride resin;
a thermal stabilizer; and
at least one thioglycolic acid compound selected from the group consisting of thioglycolic acid and thioglycolic acid esters,
wherein the chlorinated polyvinyl chloride resin contains structural units (a) to (c) represented by the following formulas (a) to (c),

[Chem. 1]
—CH 2 —CHCl—  (a)

—CH 2 —CCl 2 —  (b)

—CHCl—CHCl—  (c)

wherein the mass equivalent of the structural unit (b) of the chlorinated polyvinyl chloride resin is 5 to 35 parts by mass based on 100 parts by mass of the chlorinated polyvinyl chloride resin,
wherein the amount of added chlorine in the chlorinated polyvinyl chloride resin is 9.3 to 12.3% by mass, and
wherein the ratio of the amount in parts by mass of the thioglycolic acid compound to the mass equivalent of the structural unit (b) of the chlorinated polyvinyl chloride resin is 0.0001 to 1.5.

2. The chlorinated polyvinyl chloride resin composition according to claim 1 ,
wherein the thioglycolic acid compound is contained in an amount of 0.001% by mass or more.

3. The chlorinated polyvinyl chloride resin composition according to claim 1 ,
wherein a mass ratio of an amount of the thioglycolic acid compound and an amount of the thermal stabilizer (amount of thioglycolic acid compound/amount of thermal stabilizer) is 0.001 to 10.0.

4. The chlorinated polyvinyl chloride resin composition according to claim 1 ,
wherein the thioglycolic acid compound includes at least one selected from compounds represented by HSCH 2 COOR wherein R is H or an alkyl group.

5. The chlorinated polyvinyl chloride resin composition according to claim 1 ,
wherein the thermal stabilizer contains tin.

6. A chlorinated polyvinyl chloride resin molded article comprising:
a chlorinated polyvinyl chloride resin;
a thermal stabilizer; and
at least one thioglycolic acid compound selected from the group consisting of thioglycolic acid and thioglycolic acid esters,
wherein the chlorinated polyvinyl chloride resin contains structural units (a) to (c) represented by the following formulas (a) to (c),

[Chem. 1]
—CH 2 —CHCl—  (a)

—CH 2 —CCl 2 —  (b)

—CHCl—CHCl—  (c)

wherein the mass equivalent of the structural unit (b) of the chlorinated polyvinyl chloride resin is 5 to 35 parts by mass based on 100 parts by mass of the chlorinated polyvinyl chloride resin,
wherein the amount of added chlorine in the chlorinated polyvinyl chloride resin is 9.3 to 12.3% by mass, and
wherein the ratio of the amount in parts by mass of the thioglycolic acid compound to the mass equivalent of the structural unit (b) of the chlorinated polyvinyl chloride resin is 0.0001 to 1.5.

7. The chlorinated polyvinyl chloride resin composition according to claim 2 ,
wherein a mass ratio of an amount of the thioglycolic acid compound and an amount of the thermal stabilizer (amount of thioglycolic acid compound/amount of thermal stabilizer) is 0.001 to 10.0.

8. The chlorinated polyvinyl chloride resin composition according to claim 2 ,
wherein the thioglycolic acid compound includes at least one selected from compounds represented by HSCH 2 COOR wherein R is H or an alkyl group.

9. The chlorinated polyvinyl chloride resin composition according to claim 3 ,
wherein the thioglycolic acid compound includes at least one selected from compounds represented by HSCH 2 COOR wherein R is H or an alkyl group.

10. The chlorinated polyvinyl chloride resin composition according to claim 7 ,
wherein the thioglycolic acid compound includes at least one selected from compounds represented by HSCH 2 COOR wherein R is H or an alkyl group.

11. The chlorinated polyvinyl chloride resin composition according to claim 2 ,
wherein the thermal stabilizer contains tin.

12. The chlorinated polyvinyl chloride resin composition according to claim 3 ,
wherein the thermal stabilizer contains tin.

13. The chlorinated polyvinyl chloride resin composition according to claim 4 ,
wherein the thermal stabilizer contains tin.

14. The chlorinated polyvinyl chloride resin composition according to claim 7 ,
wherein the thermal stabilizer contains tin.

15. The chlorinated polyvinyl chloride resin composition according to claim 8 ,
wherein the thermal stabilizer contains tin.

16. The chlorinated polyvinyl chloride resin composition according to claim 9 ,
wherein the thermal stabilizer contains tin.

17. The chlorinated polyvinyl chloride resin composition according to claim 10 ,
wherein the thermal stabilizer contains tin.

Assignees

• Sekisui Chemical Co Ltd

Inventors

• Matsumura Kenichi

Classifications

• C08K5/57

  Organo-tin compounds · CPC title

• C08L2201/08

  Stabilised against heat, light or radiation or oxydation · CPC title

• C08L27/24

  halogenated · CPC title

• C08K5/58 Primary

  containing sulfur · CPC title

• C08K5/37 Primary

  Thiols · CPC title