Use of dendrimers as a processing aid and surface modifiers for thermoplastic resins
AssigneeGeneral Electric Company
InventorVijay R. Mhetar
Life of this patent
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Abstract
Dendrimer additives incorporated in thermoplastic resins (such as polycarbonate resins) are effective to alter the surface characteristics of the thermoplastic resin. Such compositions can be injection molded to produce articles in which the dendrimer additive is concentrated at the surface of the article to alter the properties of the resin. By selection of the type of dendrimer additive, the resulting characteristics of the molded article may be controlled.
Claims10
An injection moldable composition comprising:
- (a) a thermoplastic resin;
- and
- (b) a dendrimer additive in an amount effective to alter the surface characteristics of the thermoplastic resin as compared to the bulk resin after injection molding, wherein the thermoplastic resin and the dendrimer are such that the dendrimer additive remains mobile in the thermoplastic resin during injection molding.
A method for modifying the surface properties of an article formed by injection molding a thermoplastic resin composition, comprising the step of adding to the thermoplastic resin composition prior to injection molding a dendrimer additive in an amount effective to alter the surface characteristics of the thermoplastic resin as compared to the bulk resin, wherein the thermoplastic resin and the dendrimer are such that the dendrimer additive remains mobile in the thermoplastic resin during injection molding.
Dependencies are inferred from the claim text.