Patent US4504647A successfully refreshed from Google Patents.
US4504647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compounds having one or more aldimine and oxazolidine groups, process for their preparation and their use as curing agents for polyisocyanates
Assignee: Sika Schweiz AG
•
Filing: 1981-05-20
•
Granted: 1985-03-12
•
Expires: 2001-05-20
Abstract
Abstract New compounds having one, two or three aldimine groups and one, two or three oxazolidine groups in their molecule are curing agents for organic polyisocyanates. Mixtures of said new compounds with polyisocyanates are stable for long periods if humidity is absent, if they however come into contact with water or the humidity of the environment they rapidly cure resulting in elastic or hard polymers. The new compounds are prepared by reacting a diamine or polyamine with up to 6 amino groups with an epoxy compound, yielding a polyamino alcohol, which is thereafter reacted with an aldehyde, e.g. formaldehyde, an aliphatic, cyclic or heterocyclic or aromatic aldehyde.
Inventors
- 👤 Lutz D. Zabel
- 👤 Jurg Widmer
- 👤 Ueli Sulser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:01
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/04; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/3296
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
83 words
A compound having one aldimine group and one oxazolidine group in its molecule, of the formula I: ##STR12## wherein m and n are integers and are each 1, R 1 is an isopropyl radical, R 2 is a hydrogen atom, an alkyl radical having 1 to 3 carbon atoms, or cresyloxymethyl radical, and A is a bivalent organic radical selected from the group consisting of --CH 2 --CH 2 --, --CH 2 --CH 2 --CH 2 --, --(CH 2 ) 6 --, ##STR13##
Claim 2
Dependent Claim
83 words
A compound having one aldimine group and one oxazolidine group in its molecule, of the formula I: ##STR12## wherein m and n are integers and are each 1, R 1 is an isopropyl radical, R 2 is a hydrogen atom, an alkyl radical having 1 to 3 carbon atoms, or cresyloxymethyl radical, and A is a bivalent organic radical selected from the group consisting of --CH 2 --CH 2 --, --CH 2 --CH 2 --CH 2 --, --(CH 2 ) 6 --, ##STR13##
Claim 3
Dependent Claim
13 words
Compounds according to claim 1, wherein m is 1 and n is 1.
Claim 4
Dependent Claim
127 words
A moisture curable composition which comprises an organic polyisocyanate, and a compound having one or more aldimine groups and one or more oxazolidine groups in its molecule, of the formula I: ##STR14## wherein m and n are integers and are each 1, R 1 is an isopropyl radical, R 2 is a hydrogen atom, an alkyl radical having 1 to 3 carbon atoms, or a cresyloxymethyl radical, and A is a bivalent organic radical selected from the group consisting of --CH 2 --CH 2 --, --CH 2 --CH 2 --CH 2 --, --(CH 2 ) 6 --, ##STR15## and wherein a compound of formula I is present in such amounts that the isocyanate equivalents and the amine equivalents are present in the ratio of 2:1 to 1:1.
Claim 5
Dependent Claim
127 words
A moisture curable composition which comprises an organic polyisocyanate, and a compound having one or more aldimine groups and one or more oxazolidine groups in its molecule, of the formula I: ##STR14## wherein m and n are integers and are each 1, R 1 is an isopropyl radical, R 2 is a hydrogen atom, an alkyl radical having 1 to 3 carbon atoms, or a cresyloxymethyl radical, and A is a bivalent organic radical selected from the group consisting of --CH 2 --CH 2 --, --CH 2 --CH 2 --CH 2 --, --(CH 2 ) 6 --, ##STR15## and wherein a compound of formula I is present in such amounts that the isocyanate equivalents and the amine equivalents are present in the ratio of 2:1 to 1:1.
Claim 6
Dependent Claim
22 words
Composition according to claim 3, wherein the polyisocyanate is a diisocyanate or triisocyanate having a molecular weight in the range of 150-1500.
Claim 7
Dependent Claim
20 words
Composition according to claim 3, wherein the polyisocyanate is a polyisocyanateprepolymer having a molecular weight in the range of 600-80,000.
References Cited (Backward Citations)
US3420800A
Cited
US3567692A
Cited
US3661923A
Cited
US3864335A
Cited
US3941753A
Cited
US3912691A
Cited
US4024117A
Cited
US4002607A
Cited
US4032686A
Cited
US4251637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |