| 摘要 |
<p>The invention aims at a curing agent, curable compositions or compositions for optical materials, capable of providing for cured artifacts having laudable heat resistance, optical transparency, and light resistance; optical materials and methods for their production; and liquid crystal displays and LED's made by using the materials. <??>A curing agent, which comprises at least two SiH groups which is obtainable by subjecting an aliphatic organic compound ( alpha 1) having at least two carbon-carbon double bonds capable of reacting with a SiH group, said aliphatic organic compound containing 1 to 6 vinyl groups and having a molecular weight of less than 900 and a viscosity of less than 1,000 poises and an acyclic and/or cyclic polyorganosiloxane ( beta 1) having at least two SiH groups to hydrosilylation reaction, or a curing agent, which comprises at least two SiH groups which is obtainable by subjecting an organic compound ( alpha 2) represented by the formula (I) <CHEM> and a cyclic polyorganosiloxane ( beta 2) having at least two SiH groups to hydrosilylation reaction.</p> |
