Phosphate/epoxy stabilizer for extrudable polyester blends

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...

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524291, 524342, 25240021, 252404, 528 59, 528 65, 528393, 528398, 548112, 548119, 549219, 558167, 558176, C08K 53492, C08G 810, C08G 828, C08G 5940

Patent

active

049836544

ABSTRACT:
This invention is directed to a stabilizer useful to retard transesterification in moldable polymer blends containing polyester(s) during processing of the blends at elevated temperatures, particularly at high temperatures above about 285.degree. C. More particularly, the stabilizer comprises a phosphate-epoxy adduct. The stabilizer may optionally further comprise a reactive functionality component comprising a compound having a imide or oxazoline functionality and/or a hindered phenol component. The invention is also directed to a composition comprising the stabilizer and a particularly defined polymer blend.

REFERENCES:
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patent: 4066611 (1978-01-01), Axelrod
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patent: 4565833 (1986-01-01), Buszard et al.
patent: 4598109 (1986-07-01), Sekmakas et al.
patent: 4613661 (1986-09-01), Langet et al.
patent: 4696952 (1987-09-01), Shimomura et al.
patent: 4722955 (1988-02-01), Dick
patent: 4801628 (1989-01-01), Ashing et al.
Chemistry of Miscible Polycarbonate-Copolyester Blends; Smith, Barlow and Paul, Journal of Applied Polymer Science, vol. 26, 4233-4245, (1981).

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