NUCLEATING AGENT ADDITIVE COMPOSITIONS AND METHODS

Abstract

A blend of two different compounds may be applied together to form a nucleating agent additive composition. This additive composition is useful as an additive in thermoplastics, polyolefins and/or polymer resins. A blend of a bicyclo[2.2.1]heptane dicarboxylate salt and a dicarboxylate calcium metal salt provide useful and beneficial physical property effects in molded polymeric articles in terms of shrinkage and crystallization temperature of polymer resin compositions.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The following drawings are provided.

FIG. 1 shows behavior of Compound I (commercial compound HYPERFORM® HPN-68L) when combined with another nucleating agent sodium benzoate;

FIG. 2 illustrates plaque shrinkage behavior using blends of the invention;

FIG. 3 reveals shrinkage data for blends of Compound I and Compound II at 500 ppm in homopolymer;

FIG. 4 shows shrinkage data for blends of Compound I and Compound II at 1000 ppm in homopolymer;

FIG. 5 shows half time data for such blends;

FIG. 6 shows additional shrinkage data;

FIG. 7 illustrates Tc data for various blends at different concentration levels;

FIG. 8 illustrates flexural modulus data;

FIG. 9 indicates shrinkage data for such blends; and

FIG. 10 provides further shrinkage data at different loading levels.

Claims

1. A nucleating composition for thermoplastics comprising: (a) a first nucleating agent as shown

2. A thermoplastic resin composition comprising the composition of claim 1.

3. A thermoplastic article comprising the resin composition of claim 2.

4. A method of making a molded polymeric article, said method comprising the steps of: (a) providing a polyolefin composition comprising at least a first and second nucleating agent in said composition, wherein said first nucleating agent is comprised of: