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:
Aug. 09, 1977
Filed:
Mar. 14, 1975
Fusaji Shoji, Hitachi, JA;
Hiroyoshi Kokaku, Hitachi, JA;
Hisashi Kohkame, Hitachi, JA;
Koiti Kakefuda, Hitachi, JA;
Hitachi, Ltd., , JA;
Abstract
A process for producing a high impact thermoplastic resin by graft polymerization of an acrylic rubber and a polymerizable vinyl monomer which comprises agglomerating acrylic rubber particles by stirring a mixture of the acrylic rubber latex and the polymerizable vinyl monomer in the presence of a coagulating agent, the particle size of the acrylic rubber particle agglomerate being adjusted to a range of 0.2 to 10 .mu., initiating graft polymerization in the presence of a free radical initiator, adding a surface active agent during the polymerization, continuing the polymerization until demulsification occurs while the particle size of the agglomerate of the acrylic rubber particles and grafted acrylic rubber particles is adjusted to a range of 0.2 to 10 .mu., and then completing the graft polymerization by suspension polymerization method. The process can give a vinyl graft copolymer resin having high gloss and excellent weather resistance without impairing its impact resistance.