Method of bonding an optical part
OwnerKoichiro Nakamura, Hiroko Shikata +1inventors
InventorsKoichiro Nakamura, Hiroko Shikata, Hiroaki Yamamoto
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Abstract
A method of bonding an optical part, comprising the steps of applying a primer composition which comprises a trialkoxysilane having an epoxy group or alkenyl group, tetraalkoxysilane, Ti, Al or Zr alkoxide and a solvent to the surface of an optical part to be bonded, placing an epoxy resin or silicon resin adhesive composition between the optical part and another optical part and curing it. The method of bonding an optical part provides excellent heat resistance and bonding strength, suppresses the production of bubbles during curing and is free from a defect such as clouding caused by bubbles.
Claims11
A method of bonding an optical part, comprising the steps of:
- applying a primer composition which comprises (A) 100 parts by weight of a silane compound represented by the following formula (1):
- R1Si(OR2)3 (1)
- wherein R1 is an epoxy group-containing group and R2 is an alkyl group,
- (b) 5 to 500 parts by weight of a silane compound represented by the following formula (2):
- Si(OR3)4 (2)
- wherein R3 is an alkyl group,
- (C) 5 to 500 parts by weight of a metal alkoxide represented by the following formula (3):
- M(OR4)n (3)
- wherein M is Ti, Al or Zr, R4 is an alkyl group or trialkoxysilyl group, and n is 4 when M is Ti or Zr and n is 3 when M is Al, with the proviso that one of three R4's can be a trialkoxysilyl group when M is Al, and (D) a solvent, to the surface of an optical part to be bonded;
- placing an epoxy resin adhesive composition between the primer composition coated surface of the optical part and the surface of another part to be bonded to the optical part;
- and
- curing the epoxy resin adhesive composition.
A method of bonding an optical part, comprising the steps of:
- applying a primer composition which comprises (B) 100 parts by weight of a silane compound represented by the following formula (2):
- Si(OR3)4 (2)
- wherein R3 is an alkyl group,
- (A′) 5 to 500 parts by weight of a silane compound represented by the following formula (1′):
- R5Si(OR6)3 (1′)
- wherein R5 is an alkenyl group and R6 is an alkyl group,
- (C) 5 to 500 parts by weight of a metal alkoxide represented by the following formula (3):
- M(OR4)n (3)
- wherein M is Ti, Al or Zr, R4 is an alkyl group or trialkoxysilyl group, and n is 4 when M is Ti or Zr and n is 3 when M is Al, with the proviso that one of three R4'S can be a trialkoxysilyl group when M is Al, and
- (D) a solvent, to the surface of an optical part to be bonded;
- placing a silicon resin adhesive composition between the primer composition coated surface of the optical part and another part to be bonded to the optical part;
- and
- curing the silicon resin adhesive composition.
A primer composition for optical parts, comprising:
- (A) 100 parts by weight of a silane compound represented by the following formula (1):
- R1Si(OR2)3 (1)
- wherein R1 is an epoxy group-containing group and R2 is an alkyl group,
- (B) 5 to 500 parts by weight of a silane compound represented by the following formula (2):
- Si(OR3)4 (2)
- wherein R3 is an alkyl group,
- (C) 5 to 500 parts by weight of a metal alkoxide represented by the following formula (3):
- M(OR4)n (3)
- wherein M is Ti, Al or Zr, R4 is an alkyl group or trialkoxysilyl group, and n is 4 when M is Ti or Zr and n is 3 when M is Al, with the proviso that one of three R4'S can be a trialkoxysilyl group when M is Al, and
- (D) a solvent.
Dependencies are inferred from the claim text.