The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 1977
Filed:
May. 02, 1975
Applicant:
Inventors:
Terufumi Adachi, Shinnan, JA;
Tatsuro Oda, Shinnan, JA;
Assignee:
Tokuyama Sekisui Kogyo Kabushiki Kaisha, Osaka, JA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
20415918 ; 260 / ; 260 / ; 526 17 ; 526 45 ;
Abstract
A process for preparing a chlorinated polymer or copolymer of vinyl chloride which comprises varying the amount of ultraviolet rays irradiated to a unit amount of the polymer or copolymer to control the reaction rate within the range from 0.75-0.25 mole/hour/kilogram of the polymer or copolymer until the rate of substitution of chlorine attains at least 1.6 moles/kilogram of the polymer or copolymer, the polymer or copolymer being chlorinated in an aqueous suspension under irradiation of ultraviolet rays. The polymers so produced have excellent thermal stability and excellent processability.