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US 4,536,542 AGranted
Method for altering the surface of thermoplastic polymers
AssigneeGeneral Electric Company
InventorRichard B. Allen
Life of this patent
Estimating the term…
Abstract
Normally glossy thermoplastic compositions of aromatic polycarbonates, alone, or with second resins are surface-altered by adding a small effective amount of a solid terpolymer of ethylene, carbon monoxide and a third monomer, e.g., vinyl acetate.
Claims8
A method for flatting the surface of an extrudable, moldable or heat formable thermoplastic polymer composition selected from
- (a) an aromatic polycarbonate, an aromatic polyester carbonate, an aromatic dihydric phenol sulfone carbonate, or a mixture of any of the foregoing, alone, or in combination with
- (b)
- (i) a polyester resin comprising units of an aliphatic diol, a cycloaliphatic diol, or a mixture of such diols, and an aromatic diacid,
- (ii) a vinyl aromatic polymer, copolymer or terpolymer, or
- (iii) a mixture of (i) and (ii), said method comprising
- A. blending with said polymer composition before or during processing,
- (c) a copolymer comprising, by weight
- (i) 40-80% ethylene,
- (ii) 3-30% carbon monoxide, and
- (iii) 5-60% of one or more termonomers copolymerizable therewith to produce solid terpolymers, in an amount from about 0.2 to about 15 parts by weight per 100 parts by weight of the total blend;
- and, thereafter,
- B. extruding, molding or heat forming the blend into an article having a flatted surface and high strength.
9 more elements
Dependencies are inferred from the claim text.