US 12,037,423 B2
Chlorinated vinyl-chloride-based resin
Norikazu Mashino, Yamaguchi (JP); Kento Murakami, Yamaguchi (JP); Isao Higuchi, Osaka (JP); Yasunari Kusaka, Osaka (JP); and Takashi Muramoto, Yamaguchi (JP)
Assigned to SEKISUI CHEMICAL CO., LTD., Osaka (JP); and TOKUYAMA SEKISUI CO., LTD., Osaka (JP)
Appl. No. 17/434,515
Filed by SEKISUI CHEMICAL CO., LTD., Osaka (JP); and TOKUYAMA SEKISUI CO., LTD., Osaka (JP)
PCT Filed Mar. 27, 2020, PCT No. PCT/JP2020/014197
§ 371(c)(1), (2) Date Aug. 27, 2021,
PCT Pub. No. WO2020/203840, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-068508 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0144979 A1, May 12, 2022
Int. Cl. C08F 14/06 (2006.01)
CPC C08F 14/06 (2013.01) 5 Claims
 
1. A chlorinated polyvinyl chloride resin having, in Raman measurement by Raman spectroscopy, 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, and a standard deviation of the A/B of 0.090 or less,
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 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 total number of moles of the structural units (a), (b), and (c)
—CH2—CHCl—  (a)
—CH2—CCl2—  (b)
—CHCl—CHCl—  (c)