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:
Feb. 26, 1985
Filed:
May. 24, 1984
Kunizoh Kidoh, Iwaki, JP;
Hideki Wakamori, Iwaki, JP;
Fujio Suzuki, Iwaki, JP;
Takao Iwasaki, Iwaki, JP;
Kureha Kagaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Abstract
Fine particles of polyvinyl chloride produced by bulk polymerization which comprise substantially discrete spherical particles with particle sizes of 0.2 to 2 microns, a plastisol prepared by adding 80 parts by weight of dioctylphthalate to 100 parts by weight of said particles having a viscosity of 50,000 centipoise or less (measured by a B-type viscometer, No. 4 rotor, 12 rpm, 25.degree. C.) and a process for producing the same which comprises subjecting vinyl chloride to bulk polymerization in the presence of a dispersing stabilizer under gentle stirring without causing sedimentation or agglomeration of the polymer particles formed, wherein polymerization is terminated at a polymerization yield of 5 to 30%.