Flow enhanced thermoplastic compositions and methods for enhancing the flow of thermoplastic compositions

摘要

A composition that contains from 30 to 95 wt. %, based on the total weight of the composition, of a thermoplastic component and an effective amount of a flow-enhancing component. The effective amount of the flow-enhancing component reduces the viscosity of the composition by at least 10% compared to the viscosity of a composition comprising the thermoplastic component, but not an effective amount of the flow-enhancing component. The thermoplastic component is selected from the group consisting of polycarbonates, polyesters, and combinations thereof. The flow-enhancing component comprises b1) a component selected from the group consisting of metal oxides, metalloid oxides, metal alkoxides, metalloid alkoxides, and combinations thereof and b2) a mineral filler component. The weight ratio of component b1) to component b2) ranges from 1:25 to 25:1. A method for enhancing the flow of compositions comprising thermoplastic components is also disclosed.

主权项

1. A composition comprising:
a) from 20 to 50 wt. %, based on the total weight of the composition, of bisphenol-A polycarbonate resin; b) from 10 to 45 wt. %, based on the total weight of the composition, of polybutylene terephthalate; c) from 3 to 20 wt. %, based on the total weight of the composition, of a mineral filler; d) from 3 to 20 wt. %, based on the total weight of the composition, of a core-shell impact modifier; e) from 5 to 40 wt. %, based on the total weight of the composition, of an at least partially brominated polymer; f) from 1 to 10 wt. %, based on the total weight of the composition, of antimony oxide; and g) from 0 to 5 wt. %, based on the total weight of the composition, of a polytetrafluoroethylene-containing polymer component, wherein the weight ratio of component f to component c ranges from 1:25 to 25:1, wherein the composition has a melt viscosity at least 10% less than same composition not comprising component c and component f.