Resumes
Resumes
Tsutomu Ando Phones & Addresses
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Houston, TX
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League City, TX
Publications
Us Patents
Pvoh Dispersant For Vcm Polymerization
View pageUS Patent:
20180044451, Feb 15, 2018
Filed:
Mar 4, 2016
Appl. No.:
15/555856
Inventors:
- Dallas TX, US
Yohei Nishimura - Houston TX, US
Tsutomu Ando - Houston TX, US
Hidehiro Yamaguchi - Houston TX, US
Joseba Inaki Iragorri - Houston TX, US
Kaustubh Ghorpade - Houston TX, US
Yohei Nishimura - Houston TX, US
Tsutomu Ando - Houston TX, US
Hidehiro Yamaguchi - Houston TX, US
Joseba Inaki Iragorri - Houston TX, US
Kaustubh Ghorpade - Houston TX, US
Assignee:
Sekisui Specialty Chemicals America, LLC - Dallas TX
International Classification:
C08F 116/06
C08F 114/06
C08F 114/06
Abstract:
Dispersing agents useful in a suspension polymerization process may be formed based on polyvinyl alcohols and processes discloses herein. The dispersing agent may include, for example: a polyvinyl alcohol having a degree of hydrolysis in the range from 60 to 80 mol %; an absorbance of not less than 0.3 measured at a wavelength of 320 nm with respect to a 0.1 wt % aqueous solution of the polyvinyl alcohol; a block character of remaining ester groups in the range from 0.4 to 0.5; and a cloud point in the range from 35 C. to 50 C. measured with respect to a 1 wt % aqueous solution of the polyvinyl alcohol. Carbonyl groups are theorized to be present along the polymer chain, which may be quantified by 1-H NMR spectra peaks.