High density polyester-polycarbonate molding composition
AssigneeGeneral Electric Company
InventorsEileen B. Walsh, Angelika H. Clark, Ronald D. Courson, Robert R. Gallucci
Life of this patent
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Abstract
A composition is disclosed which includes polybutylene terepthalate or polyethylene terephthalate, or blends of polybutylene terephthalate and polyethylene terephthalate, a polycarbonate, barium sulfate, strontium sulfate, zinc sulfate or zirconium oxide fillers, a phosphorus-containing stabilizer and optionally a styrene rubber impact modifier.
Claims29
A composition which, based on the weight of the total composition, comprises:
- (a) from 0-60 weight percent of a polybutylene terephthalate resin;
- (b) from 0-60 weight percent of a polyethylene terephthalate resin, with the proviso that the sum of the amounts of the polybutylene terephthalate resin and the polyethylene terephthalate resin must be at least 10 weight percent;
- (c) from 10-30 weight percent of an aromatic polycarbonate resin with the proviso that the amount of (a)+(b) is greater than or equal to the amount of (c);
- (d) an effective amount of a stabilizer selected from the group consisting of an acid, alkyl, aryl, or mixed phosphite having at least one hydrogen or alkyl group;
- acidic phosphate salts, polyacid pyrophosphates and salts thereof, phosphate salts of a Group IB or Group IIB metal and phosphorous oxo-acids;
- (e) from 0-15 weight percent of a styrene-rubber impact modifier;
- (f) from 29.99-79.99 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zirconium oxide and zinc sulfate;
- and
- (g) from 0-30 weight percent of a fibrous glass reinforcing filler.
A composition which, based on the weight of the total composition, comprises:
- (a) from 0-30 weight percent of a polybutalene terephthalate resin;
- (b) from 0-60 weight percent of a polyethylene terephthalate resin, with the proviso that the sum of the amounts of the polybutylene terephthalate resin and the polyethylene terephthalate resin must be at least 10 weight percent with the proviso that the amount of (a)+(b) is greater than or equal to the amount of (c);
- (c) from 10-30 weight percent of an aromatic polycarbonate resin;
- (d) an effective amount of a stabilizer selected from the group consisting of an acid, alkyl, aryl, or mixed phosphite having at least one hydrogen or alkyl group;
- acidic phosphate salts, polyacid pyrophosphates and salts thereof, phosphate salts of a Group IB or Group IIB metal and phosphorous oxo-acids;
- (e) from 0-15 weight percent of a styrene-rubber impact modifier;
- (f) from 30-79.99 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zirconium oxide and zinc sulfate;
- and
- (g) from 0-30 weight percent of a fibrous glass reinforcing filler.
A composition which, based on the weight of the total composition, comprises:
- (a) from 6-10 weight percent of a polybutylene terephthalate resin;
- (b) from 5-10 weight percent of a polyethylene terephthalate resin;
- (c) from 12-20weight percent of a branched aromatic polycarbonate resin;
- (d) from 5-10 weight percent of an ABA block copolymer impact modifier;
- (e) from 59-71.8 weight percent of barium sulfate;
- and
- (f) from 0.2-5 weight percent of mono sodium phosphate, phosphorous acid or diphenylisodecyl phosphate.
Dependencies are inferred from the claim text.