Claims
- 1. An ultraviolet-hardenable adhesive used for bonding a water-swellable, ophthalmic-lens blank to a support member, in producing a water-swellable ophthalmic lens, consisting essentially of:
- at least one photo-hardenable silicone oil;
- at least one photoinitiator; and
- at least one adjusting constituent for adjusting a bonding force produced by the adhesive, said at least one silicone oil being selected from the group consisting of polysiloxanes represented by the following formula (I): ##STR48## wherein each of R.sub.1 to R.sub.3 is methyl or ethyl; n.sub.1, n.sub.2 and n.sub.3 are positive integers, respectively, which satisfy the following formulas: ##EQU9## X.sub.1 is --CH.sub.2).sub.3, or ##STR49## A.sub.1 is ##STR50## wherein R.sub.4 is hydrogen or methyl; and B.sub.1 is ##STR51## and said at least one adjusting constituent being represented by the following general formula (II): ##STR52## wherein each of R.sub.5 to R.sub.7 is methyl or ethyl; n.sub.4 and n.sub.5 are positive integers, respectively, which satisfy the following formulas: ##EQU10## X.sub.2 is --(CH.sub.2).sub.3 --, or ##STR53## and A.sub.2 is ##STR54## wherein R.sub.8 is hydrogen or methyl.
- 2. The ultraviolet-hardenable adhesive as set forth in claim 1, wherein said n.sub.1, n.sub.2 and n.sub.3 are positive integers, respectively, which satisfy the following formulas: ##EQU11##
- 3. The ultraviolet-hardenable adhesive as set forth in claim 1, further comprising at least one photosensitizer.
- 4. The ultraviolet-hardenable adhesive as set forth in claim 1, wherein said n.sub.4 and n.sub.5 are positive integers, respectively, which satisfy the following formulas: ##EQU12##
- 5. The ultraviolet-hardenable adhesive as set forth in claim 1, wherein the ultraviolet-hardenable adhesive contains up to 80 parts by weight of said at least one adjusting constituent, the sum of the at least one silicone oil and the at least one adjusting constituent being 100 parts by weight.
- 6. The ultraviolet-hardenable adhesive as set forth in claim 5, wherein the ultraviolet-hardenable adhesive contains 70 to 80 parts by weight of said at least one photo-hardenable silicone oil and 30 to 20 parts by weight of said at least one adjusting constituent, per 100 parts by weight of the sum of said at least one silicone oil and said at least one adjusting constituent.
- 7. The ultraviolet-hardenable adhesive as set forth in claim 1, further comprising at least one of stabilizer, filler and other adhesive additives.
Parent Case Info
This is a division of application Ser. No. 07/426,199 filed Oct. 25, 1989, now U.S. Pat. No. 5,009,731 issued Apr. 23, 1991.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4697026 |
Lee et al. |
Sep 1987 |
|
4972005 |
Aoki et al. |
Nov 1990 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
2101150 |
Jan 1983 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
426199 |
Oct 1989 |
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