Halogenated polyester flame retardants for polyphenylene ether, polyolefin and polyethylene terephthalate resins
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United States of America Patent
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Aug 27, 1991
Issued Date -
N/A
app pub date -
Nov 6, 1989
filing date -
Mar 25, 1988
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Expired
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Abstract
Flame retardancy of polyphenylene ether, polyolefin and polyethylene terphthalate resins and resin blends is increased by blending with the resin a flame retarding amount of a halogenated polyester which is the reaction product of a halogenated phthalic acid or phthalic anhydride with an epoxide or hydroxy compound containing at least two hydroxyl groups. The polyphenylene ether resin may include homopolymers or copolymers of polyphenylene ethers or blends of polyphenylene ethers with vinyl aromatic resins such as styrene polymers and copolymers. The flame retarding polyesters are also effective as processing aids in improving the flowability and moldability of the resins during melt processing.
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