Product
AssigneeThe Upjohn Company
InventorsAugustin T. Chen, David J. Goldwasser, Kemal Onder
Life of this patent
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Abstract
Disclosed are injection moldable, rapidly crystallizable compositions comprising (A) a linear polyamide selected from the series poly(4,4'-methylenediphenylene azelamide to dodecanediamide); and (B) an amount sufficient to promote the crystallization of the linear polyamide, of a material selected from the group of (i) talc, (ii) sodium benzenesulfonate, (iii) a polyethylene ionomer, (iv) a methacrylated butadiene-styrene, and (v) a multi-phase composite interpolymer. The compositions crystallize rapidly from the molten state which allows for economically attractive molding procedures including fiber production and the production of aromatic-aliphatic polyamides having a combination of excellent properties.
Claims14
A composition comprising a blend of,
- A. a linear polyamide selected from the group consisting of poly(4,4'-methylenediphenylene azelamide), poly(4,4'-methylenediphenylene sebacamide), poly(4,4'-methylenediphenylene undecanediamide), poly(4,4'-methylenediphenylene dodecanediamide), and mixtures thereof, said polyamide characterized in that it has been prepared by the reaction of 4,4'-methylenebis(phenyl isocyanate) and the corresponding dicarboxylic acid or by the reaction of 4,4'-methylenebis(aniline) and the corresponding dicarboxylic acid dihalide, said polyamide being further characterized by an inherent viscosity of from about 0.5 to about 1.5 determined as a 0.5 percent by weight solution in N-methylpyrrolidone containing about 4 percent by weight lithium chloride at 30.degree. C.;
- and
- B. at least one material selected from the group consisting of,
- (i) sodium benzenesulfonate,
- (ii) polyethylene ionomers,
- (iii) methacrylated butadiene-styrene polymers, and
- (iv) multi-phase composite interpolymers comprising:
- (a) about 25 to 95 weight percent of a first elastomeric phase polymerized from a monomer system comprising about 90 to 99.8 percent by weight of a C.sub.1 to C.sub.6 alkyl acrylate, 0.1 to 5 weight percent of a crosslinking monomer, 0.1 to 5 weight percent of a graftlinking monomer, said crosslinking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups all of which polymerize at substantially the same rate of reaction, and said graft-linking monomer being a polyethylenically unsaturated monomer having a plurality of addition polymerizable reactive groups, at least one of which polymerizes at a substantially different rate of polymerization from at least one other of said reactive groups;
- and
- (b) about 75 to 5 weight percent of a final, rigid thermoplastic phase which is polymerized in the presence of said elastomeric phase and which is free of epoxy groups
- said material (B) being present in an amount at least sufficient to promote the crystallization of said linear polyamide (A).
Dependencies are inferred from the claim text.