Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1981-04-09
1983-01-25
Jacobs, Lewis T.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524411, 524451, 524513, 524605, C08L 6702
Patent
active
043704387
ABSTRACT:
The present invention provides a non-burning, non-dripping polyester blend composition in which transesterification is suppressed, as indicated by, e.g., improved heat deflection temperature. The composition comprises (a) approximately 35 to 85 percent by weight of a blend of polyethylene terephthalate and polybutylene terephthalate wherein the polyethylene terephthalate comprises approximately 10 to 25 percent by weight of the blend; (b) approximately 5 to 60 percent by weight of a reinforcing agent; (c) approximately 4 to 15 percent by weight of at least one halogen-containing organic flame retardant compound; and (d) approximately 2 to 10 percent by weight of the amorphous non-abrasive reaction product of antimony trioxide, or a compound of antimony which generates antimony trioxide, and a substrate comprising a hydrous compound of silicon in a weight ratio within the range of approximately 1:1 to 1:4, on an antimony trioxide:substrate basis. The composition may further comprise approximately 0.1 to 8 percent by weight of a thermoplastic phenoxy resin and/or approximately 0.5 to 2.5 percent by weight of a polytetrafluoroethylene resin. The amorphous non-abrasive reaction product is preferably the reaction product of antimony trioxide and talc, preferably in a 25:75 or 45:55 weight ratio. A process for suppressing transesterification in glass reinforced, non-burning, non-dripping polyester blend compositions is also disclosed.
REFERENCES:
patent: 3740245 (1973-06-01), White et al.
patent: 3953394 (1976-04-01), Fox et al.
patent: 3962174 (1976-06-01), Berardinelli
patent: 4271064 (1981-06-01), Dieck
patent: 4284550 (1981-08-01), Mizuno et al.
Celanese Corporation
Jacobs Lewis T.
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