Patent ID: 6017993
Filing Date: 2000-01-25
Classification: C08K

Abstract:
A thermoplastic resin composition comprising a thermoplastic resin and a titanium dioxide pigment, said titanium dioxide pigment having been heat-treated;wherein the moisture content in the resin composition is in the range of 10 to 1,400 ppm as determined by a method wherein 3 g of the thermoplastic resin composition is humidified in an atmosphere maintained at a temperature of 60.degree. C. and a relative humidity of 60% for 4 hours, exposed to a stream of air having an absolute humidity of 0.009 kgH.sub.2 O/kg of dry air at a temperature of 80.degree. C. for 4 hours, and then the resin composition is deaerated at a temperature of 300.degree. C. for 30 minutes, and the moisture content is calculated by the following equation:A=B/Cwherein A is moisture content, B is content (g) of moisture in the gas collected by the deaeration as measured by the Karl Fischer method, and C is the content (g) of titanium dioxide pigment in the resin composition;the thermoplastic resin composition comprises 20 to 80% by weight of the titanium dioxide pigment, based on the weight of the resin composition; andthe thermoplastic resin composition is in a pellet form.