CURABLE ORGANOPOLYSILOXANE RESIN COMPOSITION AND OPTICAL PART MOLDED THEREFROM

摘要

A CURABLE ORGANOPOLYSILOXANE RESIN COMPOSITION HAVING A VISCOSITY AT 25°C IN THE RANGE OF 0.001 TO 5,000 PA.S, A TOTAL ACID NUMBER AS SPECIFIED BY JIS K 2501 (1992) IN THE RANGE OF 0.0001 TO 0.2 MG/G, AND LIGHT TRANSMITTANCE IN A CURED STATE EQUAL TO OR GREATER THAN 80 %; AN OPTICAL PART COMPRISED OF A CURED BODY OF THE AFOREMENTIONED COMPOSITION. THE CURABLE ORGANOPOLYSILOXANE RESIN COMPOSITION OF THE INVENTION IS CHARACTERIZED BY GOOD TRANSPARENCY, LOW DECREASE IN TRANSMITTANCE WHEN EXPOSED TO HIGH TEMPERATURES, AND EXCELLENT ADHESION WHEN REQUIRED.