Chlorinated vinyl-chloride-based resin

Patent metadata

Field	Value
Publication number	US-12351672-B2
Application number	US-202017434509-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Mar 29, 2019
Publication date	Jul 8, 2025
Grant date	Jul 8, 2025

Abstract

The present invention provides a chlorinated polyvinyl chloride resin that enables excellent continuous productivity in molding and that enables a molded article to have both processability and unevenness-preventing properties. Provided is a chlorinated polyvinyl chloride resin having an average of a ratio (A/B) of a peak intensity A observed in a range of 660 to 700 cm−1 to a peak intensity B observed in a range of 600 to 650 cm−1 of 0.50 to 2.00 in Raman imaging measurement by Raman spectroscopy.

First claim

The invention claimed is:

1. A chlorinated polyvinyl chloride resin having an average of a ratio (A/B) of a peak intensity A observed in a range of 660 to 700 cm −1 to a peak intensity B observed in a range of 600 to 650 cm −1 of 0.50 to 2.00 in Raman imaging measurement by Raman spectroscopy.

2. The chlorinated polyvinyl chloride resin according to claim 1 ,
wherein a standard deviation of the ratio (A/B) of the peak intensity A to the peak intensity B is lower than 0.100 in Raman measurement by Raman spectroscopy.

3. The chlorinated polyvinyl chloride resin according to claim 2 ,
wherein the average of the A/B and the standard deviation of the A/B satisfy the following relation (1):
0.500≤[Average of A/B ]+[Standard deviation of A/B] 1/2 ≤2.300  (1).

4. A resin composition for molding comprising the chlorinated polyvinyl chloride resin according to claim 1 .

5. A molded article molded from the resin composition for molding according to claim 4 .

6. A resin composition for molding comprising the chlorinated polyvinyl chloride resin according to claim 2 .

7. A resin composition for molding comprising the chlorinated polyvinyl chloride resin according to claim 3 .

8. A molded article molded from the resin composition for molding according to claim 6 .

9. A molded article molded from the resin composition for molding according to claim 7 .

10. The chlorinated polyvinyl chloride resin according to claim 1 ,
wherein the chlorinated polyvinyl chloride resin contains units (a) to (c) represented by the following formulas (a) to (c), and a proportion of the structural unit (a) is 5.0 mol % or higher, a proportion of the structural unit (b) is 40.0 mol % or lower, and a proportion of the structural unit (c) is 55.0 mol % or lower, relative to a total number of moles of the structural units (a), (b), and (c)
—CH 2 —CHCl—  (a)

—CH 2 —CCl 2 —  (b)

—CHCl—CHCl—  (c)

11. The chlorinated polyvinyl chloride resin according to claim 1 ,
wherein the chlorinated polyvinyl chloride resin contains units (a) to (c) represented by the following formulas (a) to (c), a proportion of the structural unit (a) is 5.0 mol % or higher and 90.0 mol % or lower, a proportion of the structural unit (b) is 5.0 mol % or higher and 40.0 mol % or lower, and a proportion of the structural unit (c) is 5.0 mol % or higher and 55.0 mol % or lower, relative to a total number of moles of the structural units (a), (b), and (c)
—CH 2 —CHCl—  (a)

—CH 2 —CCl 2 —  (b)

—CHCl—CHCl—  (c)

12. The chlorinated polyvinyl chloride resin according to claim 1 ,
wherein an amount of added chlorine is 3.3 to 15.3% by mass.

Assignees

• Sekisui Chemical Co Ltd
• Tokuyama Sekisui Co Ltd

Inventors

• Murakami Kento
• MASHINO Norikazu
• Higuchi Isao
• Kusaka Yasunari

Classifications

• C08F114/06

  Vinyl chloride · CPC title

• C08F8/22 Primary

  by reaction with free halogens · CPC title