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US 2001/0018487 A1Published application
Flame retardant resin compositions
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsAkinari Itagaki, Masaaki Yamaya, Yoshiteru Kobayashi
Life of this patent
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Abstract
To an aromatic ring-bearing synthetic resin such as an aromatic polycarbonate resin or aromatic epoxy resin is added a minor amount of an organopolysiloxane which contains phenyl radicals and monofunctional siloxane units in a molecule wherein the contents of alkoxy radicals and hydroxyl radicals are each set at less than 2% by weight. Molded parts of the resin composition are flame retardant, optically transparent, and recyclable for reuse.
Claims7
A flame retardant resin composition comprising
- (A) 100 parts by weight of a synthetic resin containing aromatic rings in a molecule, and
- (B) 0.1 to 10 parts by weight of an organopolysiloxane containing phenyl radicals as essential substituents attached to silicon atoms and siloxane units represented by R1R2R3SiO½ wherein R1, R2, and R3 are independently selected from substituted or unsubstituted monovalent hydrocarbon radicals of 1 to 6 carbon atoms, the contents of alkoxy radicals and hydroxyl radicals available as Si—OH radicals in a molecule each being less than 2% by weight, said organopolysiloxane having a weight average molecular weight of up to 2,000.
Dependencies are inferred from the claim text.