US4002601A
Expired / Lapsed
US
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Urethane oxazolidines
Assignee: Bayer AG
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Filing: 1975-09-18
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Granted: 1977-01-11
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Expires: 1995-09-18
Abstract
Abstract This invention relates to compounds corresponding to the following general formula: ##STR1## wherein M REPRESENTS AN INTEGER OF FROM 1 TO 6; N represents an integer of from 0 to 4; R 1 represents an aliphatic hydrocarbon group containing from 2 to 6 carbon atoms; R 2 and R 3 which may be the same or different, each represents hydrogen, an aliphatic hydrocarbon group containing from 1 to 4 carbon atoms, a cycloaliphatic hydrocarbon group containing from 5 to 7 carbon atoms, or an aromatic hydrocarbon group containing from 6 to 10 carbon atoms, or when taken together with the ring carbon atom they may form a 5- or 6-membered cycloaliphatic hydrocarbon ring; R 4 represents an aliphatic hydrocarbon group containing from 2 to 6 carbon atoms; and R 5 represents a residue of the type which may be obtained by removing the isocyanate groups from an organic (n + m)-valent polyisocyanate. The invention also relates to a process for preparing urethanes which contain oxazolidine groups and optionally isocyanate groups, characterized in that N-hydroxyalkyl-oxazolidines are reacted with organic polyisocyanates at an OH/NCO ratio of from 1:1 to 1:6.
Inventors
- 👤 Manfred Hajek
- 👤 Kuno Wagner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:06
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/04; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7875; C08G18/7881; C08G18/80; C08G18/8061; C08G18/8064
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
148 words
Compounds corresponding to the following general formula: ##STR5## wherein m represents an integer of from 1 to 6; n represents an integer of from 0 and 4; R 1 represents an aliphatic hydrocarbon group containing from 2 to 6 carbon atoms; R 2 and R 3 which may be the same or different, each represents hydrogen, an aliphatic hydrocarbon containing from 1 to 4 carbon atoms, a cycloaliphatic hydrocarbon group containing from 5 to 7 carbon atoms, or an aromatic hydrocarbon group containing from 6 to 10 carbon atoms, or when taken together with the ring carbon atom they may form a 5- or 6-membered cycloaliphatic hydrocarbon ring; R 4 represents an aliphatic hydrocarbon group containing from 2 to 6 carbon atoms; and R 5 represents a residue of the type which may be obtained by removal of the isocyanate groups from an organic (n + m)-valent polyisocyanate.
Claim 2
Dependent Claim
148 words
Compounds corresponding to the following general formula: ##STR5## wherein m represents an integer of from 1 to 6; n represents an integer of from 0 and 4; R 1 represents an aliphatic hydrocarbon group containing from 2 to 6 carbon atoms; R 2 and R 3 which may be the same or different, each represents hydrogen, an aliphatic hydrocarbon containing from 1 to 4 carbon atoms, a cycloaliphatic hydrocarbon group containing from 5 to 7 carbon atoms, or an aromatic hydrocarbon group containing from 6 to 10 carbon atoms, or when taken together with the ring carbon atom they may form a 5- or 6-membered cycloaliphatic hydrocarbon ring; R 4 represents an aliphatic hydrocarbon group containing from 2 to 6 carbon atoms; and R 5 represents a residue of the type which may be obtained by removal of the isocyanate groups from an organic (n + m)-valent polyisocyanate.
Claim 3
Dependent Claim
114 words
Compounds of the formula given in claim 1 wherein m represents 1 or 2 and n represents an integer of from 0 to 2 and the sum of m + n equals 2 or 3; R 1 represents an aliphatic hydrocarbon group containing 2 or 3 carbon atoms, R 2 and R 3 , which may be the same or different, each represents hydrogen or an aliphatic hydrocarbon group containing from 1 to 4 carbon atoms; R 4 represents an aliphatic hydrocarbon group cotaining 2 or 3 carbon atoms; and R 5 represents a residue of the type which may be obtained by removal of the isocyanate groups from an organic diisocyanate or triisocyanate.
Claim 4
Dependent Claim
33 words
Process for the preparation of urethanes which contain oxazolidine groups and optionally also isocyanate groups, characterized in that N-hydroxyalkyl-oxazolidines are reacted with organic polyisocyanates in an OH/NCO ratio of from 4:1 to 1:20.
Claim 5
Dependent Claim
33 words
Process for the preparation of urethanes which contain oxazolidine groups and optionally also isocyanate groups, characterized in that N-hydroxyalkyl-oxazolidines are reacted with organic polyisocyanates in an OH/NCO ratio of from 4:1 to 1:20.
Claim 6
Dependent Claim
24 words
Process according to claim 3, characterized in that N-hydroxyalkyl-oxazolidines are reacted with organic diisocyanates or triisocyanates in an OH/NCO ratio of 1:1 to 1:6.
Claim 7
Dependent Claim
139 words
A process for the preparation of oxazolidine containing urethanes comprising reacting N-hydroxyalkyl-oxazolidines of the formula ##STR6## in which R 1 -R 4 have the same meaning as in claim 1 with polyisocyanates of the formula R.sub.5 (NCO).sub.m.sub.+n in which n + m is 2 or 3 and R 5 is C 4 to C 12 alkyl, C 5 -C 15 cycloalkyl, C 6 -C 15 aryl, C 7 -C 15 aralkyl, the residue of a di- or tri-isocyanate containing urea, allophanate, biuret, isocyanurate, carbodiimide or urethane groups or the residue after removing NCO groups of the reaction product of a diisocyanate with a di- or tri-hydroxy polyether having a molecular weight of about 400 to 10,000 said reaction being at an OH to NCO ratio of about 4:1 to 1:20 and a temperature of about 10° to 120° C.
Claim 8
Dependent Claim
41 words
In the process for preparing polyurethanes by reacting polyisocyanates with hydroxyl bearing compounds, the improvement comprising reacting the polyisocyanates with N-hydroxyalkyl oxazolidines of the formula ##STR7## in which R 1 to R 4 have the same meaning as in claim 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) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |