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US 4,283,502 AGranted
Polyamide resins
AssigneeE. I. Du Pont de Nemours and Company
InventorPaul N. Richardson
Life of this patent
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Abstract
A melt compounded blend of a nylon resin and a small amount of a finely divided adduct which contains a requisite amount of anhydride functionality. The adduct polymer is found to provide nucleating effects to the resultant blend.
Claims8
A melt compounded blend consisting essentially of
- (a) a polyamide resin having a molecular weight of at least 5000, and
- (b) an adduct of maleic or fumaric anhydride and a copolymer of ethylene, at least one C.sub.3 to C.sub.6 .alpha.-olefin, and at least one nonconjugated diene, said adduct having an anhydride functionality of between about 0.1 and 4.0 milliequivalents of carboxyl groups per 1 gram of adduct, said adduct being present in the blend in an amount such that the anhydride functionality comprises between about 0.7 and 10 equivalents per 10.sup.6 g of polyamide present;
- provided that the maximum amount of adduct present is less than 1 percent based on weight of polyamide and adduct;
- and provided that the adduct is in the form of finely divided particles having an average size less than 0.5 micron.
1 more element
Dependencies are inferred from the claim text.