US4332742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low temperature storage stable liquid diphenylmethane diisocyanates
Assignee: Bayer Corp
•
Filing: 1981-06-22
•
Granted: 1982-06-01
•
Expires: 2001-06-22
Abstract
Abstract The present invention is directed to a room temperature storage stable liquid isocyanate comprising the reaction product of a diphenylmethane diisocyanate and an N-substituted ethanolamine of the formula: <IMAGE> wherein R represents a C6-C10 aryl and wherein at least one R1 represents hydrogen and the other R1 is selected from the group consisting of hydrogen, C1 to C3 alkyl and phenyl.
Inventors
- 👤 Gary F. Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:10
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/329; C07; C07C; C07C263/00; C07C263/18; C07C265/00; C07C265/14; C08G18/70; C08G18/72; C08G18/74; C08G18/76; C08G18/7657; C08G18/7664; C08G18/7671; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8041
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
63 words
A room temperature storage stable liquid isocyanate comprising the reaction product of a diphenylmethane diisocyanate and an N-substutited ethanolamine of the formula: ##STR3## wherein R represents a C 6 to C 10 aryl and wherein at least one R 1 represents hydrogen and the other R 1 is selected from the group consisting of hydrogen, C 1 to C 3 alkyl and phenyl.
Claim 2
Dependent Claim
63 words
A room temperature storage stable liquid isocyanate comprising the reaction product of a diphenylmethane diisocyanate and an N-substutited ethanolamine of the formula: ##STR3## wherein R represents a C 6 to C 10 aryl and wherein at least one R 1 represents hydrogen and the other R 1 is selected from the group consisting of hydrogen, C 1 to C 3 alkyl and phenyl.
Claim 3
Dependent Claim
16 words
The isocyanate of claim 1 having an NCO content of from 20 to 27% by weight.
Claim 4
Dependent Claim
27 words
The isocyanate of claim 1 wherein the diisocyanate and the ethanolamine are reacted at an NCO to OH equivalent ratio of from about 3:1 to about 15:1.
Claim 5
Dependent Claim
27 words
The isocyanate of claim 3 wherein the diisocyanate and the ethanolamine are reacted at an NCO to OH equivalent ratio of from about 3:1 to about 10:1.
Claim 6
Dependent Claim
27 words
The isocyanate of claim 4 wherein the diisocyanate and the ethanolamine are reacted at an NCO to OH equivalent ratio of from about 3:1 to about 6:1.
Claim 7
Dependent Claim
16 words
The isocyanate of claim 5 having an NCO content of from 20 to 27% by weight.
Claim 8
Dependent Claim
10 words
The isocyanate of claim 3 wherein said ethanolamine is N-phenylethanolamine.
References Cited (Backward Citations)
US3394165A
Cited
US3787469A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |