Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1975-05-23
1979-10-30
Michl, Paul R.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
525109, 525111, 525174, 525187, C08L 6702
Patent
active
041728599
ABSTRACT:
Toughened multi-phase thermoplastic composition consisting essentially of one phase containing 60 to 99 percent by weight of a polyester including polycarbonate matrix resin of inherent viscosity of at least 0.35 deciliter/gram, and 1 to 40 percent by weight of at least one other phase containing particles of at least one random copolymer having a particle size in the range of 0.01 to 3.0 microns and being adhered to the polyester, the at least one random copolymer having a tensile modulus in the range of 1.0 to 20,000 p.s.i., the ratio of the tensile modulus of the polyester matrix resin to tensile modulus of said at least one polymer being greater than 10 to 1. Said at least one polymer is either a branched or straight chain polymer. The toughened compositions are useful for making molded and extruded parts. Such parts possess greater ductility, less reduction in toughness from scratches and molded in notches and reduced susceptibility to catastrophic failure when compared to known melt fabricated materials.
REFERENCES:
patent: 3005795 (1961-10-01), Busse
patent: 3405198 (1968-10-01), Rein
patent: 3578730 (1971-05-01), Herwig
patent: 3644303 (1972-02-01), Berger
patent: 3723373 (1973-03-01), Lucas
patent: 3769260 (1973-10-01), Segal
Modern Plastics Encyclopedia, vol. 51, No. 10A, Oct. 1974, pp. 558+ 559.
E. I. Du Pont de Nemours and Company
Michl Paul R.
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