Highly filled extruded thermoplastic compositions having a speckled surface appearance
AssigneeGeneral Electric Company
InventorsAngelika H. Clark, Eileen B. Walsh
Life of this patent
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Abstract
A highly filled, extruded thermoplastic material which has a smooth, uniform speckled surface without any secondary finishing operations. The thermoplastic material contains a polyalkylene terephthalate resin, a polycarbonate resin, a large quantity of a filler material, a stabilizer for the resin materials and a sufficient quantity of a non-dispersing pigment to give the extruded thermoplastic material a speckled surface appearance.
Claims24
A highly filled, extruded thermoplastic composition having a speckled surface which comprises:
- (a) from 0-70 weight percent of a polybutylene terephthalate resin;
- (b) from 0-70 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 of the total composition;
- (c) from 0-35 weight percent of an aromatic polycarbonate resin wherein the amount of (a)+(b) is equal to or greater than (c);
- (d) an effective amount of a stabilizer;
- (e) from 0-15 weight percent of an impact modifier;
- (f) from 0-35 weight percent of a polyetherester or polyetherimide ester resin;
- (g) from 30-80 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zinc oxide and zinc sulfate;
- (h) from 0-30 percent of a fibrous glass reinforcing filler;
- and
- (i) an effective amount of a non-dispersing pigment sufficient to provide said extruded thermoplastic composition with a speckled surface, said non-dispersing pigment having an aspect ratio greater than 20.
A highly filled, extruded thermoplastic composition having a speckled surface which consists essentially of:
- (a) from 0-70 weight percent of a polybutylene terephthalate resin;
- (b) from 0-70 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 of the total composition;
- (c) from 0-35 weight percent of an aromatic polycarbonate resin wherein the resin of (a)+(b) is equal to or greater than (c);
- (d) an effective amount of a stabilizer;
- (e) from 0-15 weight percent of an impact modifier;
- (f) from 0-35 weight percent of a polyetherester or polyetherimide ester resin;
- (g) from 30-80 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zinc oxide and zinc sulfate;
- (h) from 0-30 percent of a fibrous glass reinforcing filler;
- and
- (i) an effective amount of a non-dispersing pigment sufficient to provide said extruded thermoplastic composition with a speckled surface, said non-dispersing pigment having an aspect ratio greater than 20.
A highly filled, extruded thermoplastic composition having a speckled surface which comprises:
- (a) 1-70 weight percent of at least one polyalkylene terephthalate resin;
- (b) from 1-35 weight percent of an aromatic polycarbonate resin wherein the amount of resin (a) is equal to or greater than amount of resin (b);
- (c) an effective amount of a stabilizer;
- (d) from 0-15 weight percent of an impact modifier;
- (e) from 0-35 weight percent of a polyetherester or polyetherimide ester resin;
- (f) from 30-80 weight percent of an inorganic filler selected from the group consisting of barium sulfate, strontium sulfate, zinc oxide and zinc sulfate;
- and
- (g) an effective amount of a non-dispersing pigment sufficient to provide said extruded thermoplastic composition with a speckled surface, said non-dispersing pigment having an aspect ratio greater than 20.
Dependencies are inferred from the claim text.