| 摘要 |
A CURABLE SILICONE COMPOSITION CHARACTERISTICALLY COMPRISES (A) (A-1) AN ALKENYL-CONTAININGDIALKYLPOLYSILOXANE AND A VISCOSITY OF AT LEAST 1,000 MPA-S TO NOT MORE THAN 20,000 MPA-S AND (A-2) AN ALKENYL-CONTAINING, RESIN-FORM ORGANOPOLYSILOXANE THAT COMPRISES THE SIO4/2 UNIT, R12R2SIO1/2 UNIT, AND R13SIO1/2 UNIT WHEREIN R1 IS ALKYL AND R2 IS AIKENYL, THAT CONTAINS FROM 2.5 TO 5.0 MASS% ALKENYL GROUP, AND THAT HAS A RATIO FOR THE TOTAL NUMBER OF MOLES OF R12R2SIO1/2 AND R13SIO1/2 UNITS TO 1 MOLE OF THE SIO4/2 UNIT IN THE RANGE FROM 0.70 TO 1.10; (B) AN ORGANOPOLYSILOXANE THAT CONTAINS AT LEAST 0.9 MASS% SILICON-BONDED HYDROGEN; AND (C) A HYDROSILYLATION REACTION CATALYST AND PROVIDES A BENDING-TOLERANT AND HIGHLY TRANSPARENT CURED SILICONE MATERIAL THAT CHARACTERISTICALLY HAS A HARDNESS IS IN THE RANGE FROM 80 TO 95, THE PARALLEL LIGHT TRANSMITTANCE AT 200°C IS A VALUE THAT IS AT LEAST 99% OF THE PARALLEL LIGHT TRANSMITTANCE AT 25°C. |
