Compositions of poly(phenylene ether) and polyester resins, which exhibit improved heat resistance and flow
AssigneeGeneral Electric Company
InventorGeoffrey H. Riding
Life of this patent
Estimating the term…
Abstract
Disclosed are compositions having the characteristic of improved heat distortion temperature for compositions comprising a poly(phenylene ether) resin, a polyester resin, a polycarbonate resin, a reinforcing filler, and a heat enhancing non-fibrous filler in combination with a poly(tetrafluoroethylene) resin. The compositions may further comprise at least one additive from the group consisting of impact modifiers, non-elastomeric polymers of an alkenyl aromatic compound and an additive package. The flow of such compositions can be further improved with the addition of an optional flow promoting terpene phenol material without significant loss of the physical properties.
Claims20
A composition comprising:
- a) a poly(phenylene ether) resin;
- b) a polyester resin;
- c) an amount of a polycarbonate resin sufficient to effectively enhance the ductility of the composition;
- d) an amount of at least one reinforcing filler sufficient to effectively increase the stiffness of the composition;
- and
- e) an amount of a non-fibrous filler in combination with a poly(tetrafluoroethylene) resin sufficient to effectively enhance the heat distortion temperature of the composition.
A composition comprising:
- a) about 15-50% by weight of at least one poly(phenylene ether) resin;
- b) about 20-80% by weight of at least one polyester resin, the weight ratio of poly(phenylene ether) resin to the polyester resin being at most about 1.2:1;
- c) about 3-50% by weight of at least one polymer containing a substantial proportion of aromatic polycarbonate units and having a weight average molecular weight of at least about 40,000 as determined by gel permeation chromatography relative to polystyrene or a blend thereof with a styrene homopolymer;
- d) about 5-60% by weight of at least one reinforcing filler;
- e) about 0.05-5% by weight of a mixture of a non-fibrous filler selected from the group consisting of talcs, clays, micas, metal sulfates, calcium carbonates, silicates and mixtures thereof and a poly(tetrafluoroethylene) resin wherein the weight ratio of the non-fibrous filler to the poly(tetrafluoroethylene) resin is between about 1:4 and about 4:1;
- f) optionally, up to about 20% by weight of a terpene-phenol material;
- g) optionally, up to about 15% by weight of at least one impact modifier;
- h) optionally, up to about 20% by weight of at least one non-elastomeric polymer of an alkenyl aromatic compound;
- and
- i) optionally, up to about 2% by weight of a additive package comprising at least one additive selected from the group consisting of hindered phenols, thio compounds and fatty amides;
- wherein all weight percents are based on the total weight of the composition.
A composition consisting essentially of:
- a) a poly(phenylene ether) resin;
- b) a polyester resin;
- c) a polycarbonate resin;
- d) at least one reinforcing filler;
- e) a non-fibrous filler in combination with a poly(tetrafluoroethylene) resin;
- f) optionally, at least one impact modifier;
- g) optionally, at least one non-elastomeric polymer of an alkenyl aromatic compound;
- and
- h) optionally, a terpene phenol material.
A method for making a composition of matter comprising the steps of (i) admixing a poly(phenylene ether) resin, a polyester resin, a polycarbonate resin;
- a non-fibrous filler in combination with a poly(tetrafluoroethylene) resin;
- optionally, at least one impact modifier;
- optionally, at least one non-elastomeric polymer of an alkenyl aromatic compound and optionally, a terpene phenol material to make an admixture;
- (ii) vacuum venting the admixture;
- and (iii) admixing a reinforcing filler to the admixture.
Dependencies are inferred from the claim text.