Preparation of low loss optical material from difunctional silyl enol ethers and difunctional silanols
申请人:——
公开号:US20030232951A1
公开(公告)日:2003-12-18
Certain compounds within the general formula (I)
1
wherein:
Ra and Ra′ are independently alkyl, aryl or aralkyl; Rb and Rb′ are independently CH
2
, CH-alkyl, CH-aryl or CH-aralkyl; R
1
and R
2
, are independently selected from substituted or unsubstituted alkyl, aryl, aralkyl, heteroaryl, heteroaralkyl; and m is at least 1, and preferably fluorinated or cross-linkable under controlled conditions.
Compounds of formula (I) are reactable with silanediols to produce linear polycondensate organosiloxanes of defined structure without uncontrolled crosslinking. The polycondensates may be cured and are suitable as optical materials.