US4113705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Triisocyanates useful for the production of polyurethane resins
Assignee: Bayer AG
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Filing: 1977-03-17
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Granted: 1978-09-12
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Expires: 1997-03-17
Abstract
Abstract This invention relates to new liquid cycloaliphatic triisocyanates and to their use as isocyanate components for the production of polyurethane resins by the known isocyanate polyaddition process.
Inventors
- 👤 Manfred Bock
- 👤 Josef Pedain
- 👤 Walter Uerdingen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:46
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/757
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
131 words
Triisocyanates of the formula ##STR20## in which R 1 , R 2 , R 3 and R 4 , which may be the same or different, represent hydrogen, a methyl group or the group--(CH 2 ) n --NCO where n represents an integer of from 1 to 3 and two of the groups represented by R 1 , R 2 , R 3 or R 4 are --(CH 2 ) n --NCO groups; m represents 0, 1 or 2; and R 5 , R 6 , R 7 and R 8 , which may be the same or different, represent hydrogen or a methyl group, the total number of methyl groups represented by R 5 , R 6 , R 7 and R 8 being limited to a maximum of 2.
Claim 2
Dependent Claim
131 words
Triisocyanates of the formula ##STR20## in which R 1 , R 2 , R 3 and R 4 , which may be the same or different, represent hydrogen, a methyl group or the group--(CH 2 ) n --NCO where n represents an integer of from 1 to 3 and two of the groups represented by R 1 , R 2 , R 3 or R 4 are --(CH 2 ) n --NCO groups; m represents 0, 1 or 2; and R 5 , R 6 , R 7 and R 8 , which may be the same or different, represent hydrogen or a methyl group, the total number of methyl groups represented by R 5 , R 6 , R 7 and R 8 being limited to a maximum of 2.
Claim 3
Dependent Claim
150 words
Process for the preparation of triisocyanates according to claim 1 comprising subjecting the triamines of the formula ##STR21## to a phosgenation reaction, in which formula R 9 , R 10 , R 11 and R 12 , which may be the same or different, represent hydrogen, a methyl group or the group--(CH 2 ) n --NH 2 where n represents an integer of from 1 to 3 and two of the groups represented by R 9 , R 10 , R 11 and R 12 are --(CH 2 ) n --NH 2 groups; m represents 0, 1 or 2; and R 13 , R 14 , R 16 and R 17 , which are the same or different, represent hydrogen or a methyl group, the total number of methyl groups represented by R 13 , R 14 , R 16 and R 17 being limited to a maximum of 2.
Claim 4
Dependent Claim
45 words
In an isocyanate polyaddition process for the production of polyurethane resins, the improvement comprising reacting compounds having a molecular weight of from about 400 to 10,000 which contain at least two hydrogen atoms capable of reacting with isocyanate groups and the triisocyanates of claim 1.
Claim 5
Dependent Claim
42 words
The process of claim 3 wherein the compounds which contain at least two hydrogen atoms capable of reacting with isocyanate groups are polyhydroxyl compounds having from 2 to 8 hydroxyl groups and having a molecular weight of from about 800 to 10,000.
Claim 6
Dependent Claim
26 words
The process of claim 4 wherein the polyhydroxyl compounds are selected from the group consisting of polyesters polyethers, polythioethers, polyacetals, polycarbonates, polyester amides and vinyl copolymers.
Claim 7
Dependent Claim
34 words
The process of claim 3 wherein polyols having a molecular weight of from about 62 to 400 are reacted in combination with the compounds having a molecular weight of from about 400 to 10,000.
Claim 8
Dependent Claim
16 words
The process of claim 4 wherein the NCO/OH equivalent ratio is between about 0.8:1 and 1.2:1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-11 | 1982-03-13 | 1982-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-11 | 1986-03-13 | 1986-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-11 | 1990-03-13 | 1990-09-12 | $7700.00 | Window Closed / Lapsed |