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US 2014/0275372 A1Published application
Thermoplastic Compositions, Method of Manufacture, and Articles Therefrom
AssigneeSabic Innovative Plastics IP B.V.
InventorsYUANQING HE, Amit Kulkarni, Johannes Hubertus Lohmeijer
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Abstract
This disclosure relates to thermoplastic compositions, in particular polycarbonate thermoplastic compositions containing a surface-treated talc, methods for the manufacture of such compositions, and articles formed from the compositions.
Claims15
A thermoplastic composition comprising, based on the total weight of the thermoplastic composition:
- (a) 30-60 percent of one or more polycarbonates;
- (b) 10-40 percent of one or more polyesters;
- (c) 0-30 percent of one or more impact modifiers;
- (d) 5-35 percent of talc that is surface treated with a combination of 85 to 90 weight percent cetyl dimethicone and 10 to 15 percent 1-hexadecane, wherein the talc is characterized by:
- (i) a mean particle diameter if 1.8 μm;
- (ii) a Hegman fineness on grind value of 7;
- (iii) a surface area of 14 m2/g;
- a specific gravity of 2.8;
- (iv) an average moisture of <0.5 weight percent;
- and
- (v) a bulk density of 40 lbs/ft3.
8 more elements
A thermoplastic composition comprising, based on the total weight of the thermoplastic composition:
- (a) 30-60 percent of one or more polycarbonates;
- (b) 10-40 percent of one or more polyesters;
- (c) 1-30 percent of one or more impact modifiers;
- and
- (d) 18-24 percent of talc that is surface treated with a combination of 85 to 90 weight percent cetyl dimethicone and 10 to 15 percent 1-hexadecane, wherein the talc is characterized by:
- (i) a mean particle diameter if 1.8 μm;
- (ii) a Hegman fineness on grind value of 7;
- (iii) a surface area of 14 m2/g;
- a specific gravity of 2.8;
- (iv) an average moisture of <0.5 weight percent;
- and
- (v) a bulk density of 40 lbs/ft3 wherein:
- there is a 10 percent or less change in the molecular weight of the compounded polycarbonate as compared to molecular weight of the compounded polycarbonate in a composition containing talc that is not surface treated;
- the melt viscosity (MV) is 7 percent greater than the melt viscosity of a thermoplastic composition containing talc that is not surface treated;
- the melt-volume flow rate (MVR) as measured according to ISO1133 is 10 percent greater than the melt-volume flow rates of a thermoplastic composition containing talc that is not surface treated.
12 more elements
Dependencies are inferred from the claim text.