Claims
- 1. A sulfur-containing urethane-based resin composition comprising a polythiol having four or more functional groups and at least one isocyanate selected from the group consisting of polyisocyanate compounds, polyisothiocyanate compounds and isocyanato group-containing polyisothiocyanate compounds, said polythiol being represented by any of the following formula (1): wherein R1, R2, R3 and R4 are each selected from the group consisting of H, --CH.sub.2 SH, --CH.sub.2 SCH.sub.2 CH.sub.2 SH, ##STR65## provided that where any one of R1, R2, R3 and R4 is H, at least one of the other three radicals represents ##STR66## where any two of R1, R2, R3 and R4 are H, two others are independently selected from ##STR67## and any three or all of R1, R2, R3 and R4 are not H simultaneously; formula (2):
- (HSCH.sub.2).sub.4-m C(CH.sub.2 SCH.sub.2 CH.sub.2 SH).sub.m( 2)
- wherein m denotes an integer of 1 to 3; and formula (3): ##STR68## wherein n denotes an integer of 0 to 3.
- 2. The composition of claim 1 wherein the proportion of the isocyanate to the polythiol is from 0.5 to 3.0 in terms of the molar ratio of the functional groups (NCO+NCS)/SH.
- 3. The process for producing a sulfur-containing urethane-based resin, which comprises curing the composition of claim 1 by heating.
- 4. A sulfur-containing urethane-based resin obtained by the process of claim 3.
- 5. The process of claim 3 wherein the proportion of the isocyanate to the isocyanate to the polythiol is from 0.5 to 3.0 in terms of the molar ratio of the functional groups (NCO+NCS)/SH.
- 6. A sulfur-containing urethane-based resin obtained by the process of claim 5.
- 7. The composition of claim 1 wherein the polythiol has the following formula: ##STR69##
- 8. The composition of claim 1 wherein the polythiol has the following formula:
- 9. The composition of claim 1 wherein the polythiol has the following formula:
- 10. The composition of claim 1 wherein the polythiol has the following formula:
- 11. The composition of claim 1 wherein the polythiol has the following formula:
- 12. The composition of claim 1 wherein the polythiol has the following formula:
- 13. The composition of claim 1 wherein the polythiol has the following formula:
- 14. The composition of claim 1 wherein the polythiol has the following formula:
- 15. The composition of claim 1 wherein the polythiol has the following formula:
- 16. The composition of claim 1 wherein the polythiol has the following formula:
- 17. The composition of claim 1 wherein the polythiol has the following formula:
- 18. The composition of claim 1 wherein the polythiol has the following formula:
- 19. The composition of claim 1 wherein the polythiol has the following formula:
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-006792 |
Jan 1994 |
JPX |
|
Parent Case Info
This application is a divisional of application Ser. No. 08/753,436, filed Nov. 25, 1996, now U.S. Pat. No. 5,837,797, which is a divisional of application Ser. No. 08/373,083, filed on Jan. 17, 1995, now U.S. Pat. No. 5,608,115.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
5087758 |
Kanemura et al. |
Feb 1992 |
|
5283312 |
Kanemura et al. |
Feb 1994 |
|
Foreign Referenced Citations (6)
Number |
Date |
Country |
0528590 |
Feb 1993 |
EPX |
0378895 |
Jul 1993 |
EPX |
0665219 |
Aug 1995 |
EPX |
0713105 |
Nov 1995 |
EPX |
6-065190 |
Mar 1994 |
JPX |
6-116337 |
Apr 1994 |
JPX |
Divisions (2)
|
Number |
Date |
Country |
Parent |
753436 |
Nov 1996 |
|
Parent |
373038 |
Jan 1995 |
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