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:
Mar. 23, 1976
Filed:
May. 31, 1974
Applicant:
Inventors:
Assignee:
Shinetsu Chemical Company, Tokyo, JA;
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 863 ; 260 871 ; 260 / ; 260 / ; 260 / ;
Abstract
When vinyl chloride or a mixture of monomers containing vinyl chloride as its main component is subjected to suspension-polymerization, in the presence of a polymerization initiator, employing as a suspending agent an aqueous medium consisting of two kinds of water-soluble cellulose ethers, the 2% aqueous solution of one of which has a viscosity of at most 100 cps at 20.degree.C, and that of the other has a viscosity of at least 400 cps at 20.degree.C, the product obtained will be a porous polymer superior not only in uniformity of particle size, and absorptivity of plasticizers and liquid heat-stabilizers but also in processability.