Additive composition and methods for using the same
AssigneeMilliken & Company
InventorsThomas A. Canada, K. David Lake, Jr., Keith A. Keller, Steven D. Huntley
Life of this patent
Estimating the term…
Abstract
An additive composition comprises a plurality of granules. The granules comprise a polymer additive selected from the group consisting of clarifying agents, nucleating agents, and mixtures thereof. About 75 wt. % or more of the granules present in the additive composition have a particle size of about 0.5 mm to about 2.8 mm, and the granules have a particle hardness of less than 50 cN. A method for producing a polymer composition utilizes the above-described additive composition.
Claims17
An additive composition comprising a plurality of granules, the granules comprising a polymer additive selected from the group consisting of clarifying agents, nucleating agents, and mixtures thereof, wherein about 75 wt. % or more of the granules present in the additive composition have a particle size of about 0.5 mm to about 2.8 mm, and wherein the granules have a particle hardness of less than 50 cN.
A method for producing a polymer composition, the method comprising the steps of:
- (a) providing a thermoplastic polymer;
- (b) providing an additive composition, the additive composition comprising a plurality of granules, the granules comprising a polymer additive selected from the group consisting of clarifying agents, nucleating agents, and mixtures thereof, wherein about 75 wt. % or more of the granules present in the additive composition have a particle size of about 0.5 mm to about 2.8 mm, and wherein the granules have a particle hardness of less than 50 cN;
- (c) mixing the thermoplastic polymer and the additive composition;
- (d) heating the mixture from step (c) to a temperature above the melting point of the thermoplastic polymer;
- and
- (e) extruding the molten mixture from step (d) to produce a polymer composition.
Dependencies are inferred from the claim text.