Claims
- 1. An optical material prepared from a resin having a high refractive index produced by radically polymerizing a material monomer, said material monomer comprising:
- [I] at least one polymerizable polyfunctional thioacrylate or polyfunctional thiomethacrylate represented by the general formula (1) ##STR5## wherein R.sub.1 and R.sub.2 represent H or CH.sub.3, R.sub.3 and R.sub.4 independently represent H, CH.sub.3 or OH, k and m independently represent an integer of 1 to 5, and 1 and n independently represent 0 or an integer of 1 to 4,
- the general formula (2) ##STR6## wherein R.sub.1, R.sub.2 and k are the same as defined in the general formula (1), and X represents 0 or S, or
- the general formula (3) ##STR7## wherein R.sub.1 and R.sub.2 are the same as defined in the general formula (1), and R.sub.5 represents a phenylene group, a xylylene group, a nucleus-substituted phenylene group or a nucleus-substituted xylylene group; and
- optionally [II] at least one other polymerizable monomer which is radically polymerizable with said polymerizable monomer [I].
- 2. The optical material according to claim 1, wherein the content of said polymerizable monomer [I] is at least 5% by weight based on said material monomer.
- 3. The optical material according to claim 1, wherein the content of said polymerizable monomer [I] is at least 10% by weight based on said material monomer.
- 4. The optical material according to claim 1, wherein as said polymerizable monomer [II], a monomer whose homopolymer has a refractive index of at least 1.48 is used.
- 5. The optical material according to claim 1, which has a refractive index of at least 1.55.
Priority Claims (3)
Number |
Date |
Country |
Kind |
61-308337 |
Dec 1986 |
JPX |
|
62-103017 |
Apr 1987 |
JPX |
|
62-273270 |
Oct 1987 |
JPX |
|
Parent Case Info
This application is a division of application Ser. No. 138,041, filed Dec. 28, 1987, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (1)
Number |
Date |
Country |
2093843 |
Jan 1985 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
138041 |
Dec 1987 |
|