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. 26, 1996
Filed:
Jul. 28, 1994
Masaya Okamoto, Ichihara, JP;
Takashi Kanezaki, Ichihara, JP;
Idemitsu Petrochemical Co., Ltd., Tokyo, JP;
Abstract
A polycarbonate-polydimethylsiloxane copolymer, the copolymer comprising a polycarbonate block of the formula ##STR1## wherein R.sup.1 and R.sup.2 are hydrogen or a C.sub.1 -C.sub.4 alkyl, R.sup.3 and R.sup.4 are hydrogen, halogen, a C.sub.1 -C.sub.20 alkyl or an aryl, x is 1 to 5, y is to 4 and n is 1 to 100, and a polydimethylsiloxane block of the formula ##STR2## wherein R.sup.5 and R.sup.6 are an organic residue having an aromatic nucleus and m is greater than or equal to 100, the copolymer having a content of the polydimethylsiloxane block of 0.5 to 10% by weight, an n-hexane soluble matter content in an amount of 1.0% by weight or less and a viscosity average molecular weight of 10,000-50,000. The copolymer has a high impact resistance and when blended with a glass fiber or a carbon fiber forms a molded product having an extremely high Izod impact strength.