	US 12,187,883 B2
	Chlorinated vinyl chloride resin
Kento Murakami, Yamaguchi (JP); Norikazu Mashino, Yamaguchi (JP); Isao Higuchi, Osaka (JP); and Yasunari Kusaka, Osaka (JP)
Assigned to SEKISUI CHEMICAL CO., LTD., Osaka (JP); and TOKUYAMA SEKISUI CO., LTD., Osaka (JP)
Appl. No. 17/435,202
Filed by SEKISUI CHEMICAL CO., LTD., Osaka (JP); and TOKUYAMA SEKISUI CO., LTD., Osaka (JP)
PCT Filed Mar. 27, 2020, PCT No. PCT/JP2020/014192 § 371(c)(1), (2) Date Aug. 31, 2021, PCT Pub. No. WO2020/203839, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-068510 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0135783 A1, May 5, 2022
Int. Cl. C08L 27/24 (2006.01)

CPC C08L 27/24 (2013.01)

7 Claims

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⁻¹to a peak intensity B observed in a range of 600 to 650 cm⁻¹of 0.50 to 2.00 in Raman imaging measurement by Raman spectroscopy, and having a standard deviation of the ratio (A/B) of the peak intensity A to the peak intensity B of 0.100 to 0.200 in Raman measurement by Raman spectroscopy,

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)