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. 22, 1978
Filed:
May. 10, 1973
Kazumasa Kamada, Ohtake, JP;
Ryoji Handa, Ohtake, JP;
Norihisa Kusakawa, Yamaguchi, JP;
Keita Yamamoto, Ohtake, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
A thermoplastic graft polymer composition excellent in weather resistance, impact resistance and appearance is obtained by seed-polymerizing 50 to 95 parts by weight of a mixture (b) of 60% by weight or more of at least one acrylic ester, 39.9% by weight or less of at least one monomer copolymerizable therewith and 0.1 to 10% by weight of at least one crosslinking monomer having at least two non-conjugated C .dbd. C bonds in the presence of 5 to 50 parts by weight (solids) of a latex (particle size: 0.04 to 0.24 .mu.) of a crosslinked rigid resin (a) having a glass transition temperature of at least 50.degree. C., a decomposition temperature of at least 240.degree. C. and a gel content of at least 70% by weight or more to prepare two-layered crosslinked acrylic rubber particles (1) having a degree of swelling of 3 to 15, emulsion-graft-polymerizing 5 to 1,900 parts by weight of a monomer mixture (2) of 10 to 90% by weight of at least one aromatic vinyl compound and 90 to 10% by weight of at least one ethylenically unsaturated compound having the general formula CH.sub.2 = CRX, wherein R is H or CH.sub.3, and X is CN or COOR.sub.1 (wherein R.sub.1 is an alkyl group having 1 to 4 carbon atoms) in the presence of a latex containing 100 parts by weight of said two-layered crosslinked acrylic rubber particles (1) to obtain a graft polymer (3) and, if necessary, blending said graft polymer (3) with a rigid thermoplastic resin (4) so that 5 to 70% by weight of the two-layered crosslinked acrylic rubber particles (1) are contained in the resulting composition.