Patent ID: 6824884
Filing Date: 2004-11-30
Classification: C08L,H05K,Y10T

Abstract:
A heat resistant resin composition comprising 70 to 30 wt % of a crystalline polyarylketone resin having a peak crystalline melting temperature of 260Â° C. or higher and 30 to 70 wt % of a noncrystalline polyetherimide resin, wherein said composition has at least 2 peaks of loss tangent (tan &dgr;) between 140Â° C. and 250Â° C. a peak temperature of tan &dgr; of the polyetherimide resin not higher than 250Â° C., determined by dynamic mechanical measurement, and wherein a first order derivative of the tan &dgr; to temperature of each of said 2 peaks changes from a positive to a negative value with an increase in temperature of said composition.