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:
Nov. 30, 1999
Filed:
Jan. 22, 1997
Michio Kobayashi, Sakai, JP;
Daicel Chemical Industries, Ltd., Osaka, JP;
Abstract
A flame-retardant of an aromatic phosphoric acid ester of formula (I) and a fluororesin such as polytetrafluoroethylene, are added to a mixture of an aromatic polycarbonate and a styrenic resin: ##STR1## wherein (i) at least one of R.sup.1 to R.sup.4 is a 2,3-dialkylphenyl group, a 3,4-dialkylphenyl group or a 3,5-dialkylphenyl group each substituted with alkyl groups each having 1 to 3 carbon atoms, A is a phenylene group, n denotes an integer of 0 to 5, and R.sup.1 to R.sup.4 contain the dialkylphenyl group and a monoalkylphenyl group in a ratio of the former/the latter is 50/50 to 90/10 (% by weight); or (ii) at least one of R.sup.1 to R.sup.4 is a phenyl group substituted with 1 to 5 alkyl groups each having 1 to 4 carbon atoms, A is 1,3-phenylene group and n denotes an integer of 1 to 5. The flame-retardant may be a mixture of the compound (i) and the compound (ii).