Filled polyamide compositions with silanes and sulfonamides
AssigneeE. I. Du Pont de Nemours and Company
InventorThomas J. Hyde
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Abstract
This invention is directed to a composition of matter which is derived from 50 to 75 parts of polyamide resin with a number average molecular weight of at least 11,000, plus 25 to 50 parts of a selected mineral filler, 0.2 to 0.9 parts of aminofunctional silane, and 0.2 to 0.9 parts of a selected sulfonamide. The composition provides molded parts with significantly improved falling-weight impact resistance at no sacrifice of rigidity under a wide variety of processing conditions.
Claims11
A composition consisting essentially of
- (a) about 50 to 80 parts by weight of at least one polyamide having a number average molecular weight of at least 11,000,
- (b) about 20 to 50 parts by weight of at least one mineral filler that is substantially anhydrous and has a mean average particle size of 2.0 micrometers or less,
- (c) about 0.2 to 0.9 parts by weight of at least one aminofunctional silane, and
- (d) about 0.2 to 0.9 parts by weight of at least one N-substituted hydrocarbyl sulfonamide.
The composition of claims, 1, 2, 3 or 4 wherein the aminofunctional silane is an amino-(lower alkyl)tri(lower alkoxy) silane.
Dependencies are inferred from the claim text.