Polyetherimide resin/polyester resin blends having improved visual clarity
AssigneeGeneral Electric Company
InventorsYimin Jin, Jun Liao
Life of this patent
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Abstract
Transparent thermoplastic resin compositions include a polyetherimide resin, a polyester resin, sodium benzene phosphinate, and optionally 3,4-epoxy cyclohexylmethyl-3,4-epoxy cyclohexanecarboxylate and preferably comprising a first polyester resin and a second polyester resin and sodium benzene phosphinate, wherein from 50 to 100 mole percent of the structural units of the first polyester resin include an alicyclic hydrocarbon radical as the diol residue of the structural unit, and wherein less than 50 mole percent of the structural units of the second polyester include an alicyclic hydrocarbon radical as the diol residue of the structural unit, exhibit resistance to elevated temperature and improved impact properties.
Claims35
A thermoplastic resin composition, comprising a mixture, based on 100 pbw of the thermoplastic resin composition, of:
- (a) from about 1 to about 99 pbw of a polyetherimide resin;
- (b) from about 1 to about 99 pbw of a polyester resin;
- (c) from 0.001 and about 1.5 pbw metal phosphate salt;
- and
- (e) up to about 6.0 pbw epoxy compound.
A thermoplastic resin composition, comprising a mixture, based on 100 pbw of the thermoplastic resin composition, of:
- (a) from about 1 to about 99 pbw of a polyetherimide resin comprising structural units of the formula:
- wherein each R is independently paraphenylene or metaphenylene and T is a divalent radical according to the formula:
- (b) from about 2 to about 15 pbw of a poly(cyclohexane-1,4-dimethylene terephthalate) resin;
- (c) from 0 to about 48 pbw of one or more copolyester resins, wherein said copolyester resins each comprise recurring structural units, each structural unit comprises a diol residue and a diacid residue, each of the structural units comprises a 1,4-phenylene or 1,3-phenylene radical as the diacid residue of the structural unit and from 50 to 90 mole percent of the structural units comprise a dimethylene radical as the diol residue of the unit and from 0 to 50 mole percent of the structural units comprise a cyclohexane-1,4-dimethylene radical as the diol residue of the structural unit, and poly(ethylene terephthalate) resins;
- and
- (d) up to about 1.5 pbw sodium benzene phosphinate;
- and
- (e) up to about 6.0 pbw 3,4-epoxy cyclohexylmethyl-3,4-epoxy cyclohexanecarboxylate, sodium stearate, or a mixture thereof.
A thermoplastic resin composition, comprising a mixture, based on 100 pbw of the thermoplastic resin composition, of:
- (a) from about 60 to about 95 pbw of a polyetherimide resin,
- (b) from about 2 to about 15 pbw of a first polyester resin comprising recurring structural units, wherein each structural unit comprises a diol residue and a diacid residue and wherein from 90 to 100 mole percent of the structural units of the first polyester resin comprise a divalent alicyclic hydrocarbon radical as the diol residue of the structural unit,
- (c) from about 2 to about 48 pbw of a second polyester comprising recurring structural units, wherein each structural unit comprises a diol residue and a diacid residue and wherein from 0 mole percent to less than 90 mole percent of the structural units of the second polyester resin comprise a divalent alicyclic hydrocarbon radical as the a diol residue of the structural unit, and provided that, if the second polyester comprises structural units wherein the diol residue is a dimethylene radical, then the second polyester does not comprise any structural units wherein the diacid residue is a 2,6-naphthalene dicarboxylate radical;
- (d) about 0.001 to about 0.1 pbw sodium benzene phosphinate;
- and
- (e) up to 5.0 pbw 3,4-epoxy cyclohexylmethyl-3,4-epoxy cyclohexanecarboxylate, sodium stearate, or a mixture thereof.
Dependencies are inferred from the claim text.