Patent US4521545A successfully refreshed from Google Patents.
US4521545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latent catalysts for the isocyanate polyaddition reaction
Assignee: Bayer AG
•
Filing: 1984-07-19
•
Granted: 1985-06-04
•
Expires: 2004-07-19
Abstract
Abstract Compositions which are storage stable at room temperature are made from an organic polyisocyanate, a compound containing at least two isocyanate-reactive groups and a latent catalyst. The latent catalyst is formed from an amine and an alkylating ester of an acid of phosphorus. These compositions react to form isocyanate polyaddition products when exposed to a temperature of 60° C. or higher. These compositions are useful in the production of adhesives, foamed and non-foamed plastics and coatings.
Inventors
- 👤 Dimitrios Kerimis
- 👤 Rudolf Hombach
- 👤 Peter Muller
- 👤 Manfred Dollhausen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:22
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/166; C08G18/168; C08G18/18; C08G18/1875
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
66 words
A composition which is storage stable at room temperature which crosslinks very quickly when exposed to a temperature of 60° C. or higher comprising: (a) an organic polyisocyanate, (b) a compound containing at least two isocyanatereactive groups and having a molecular weight of from 400 to 10,000 and (c) an ammonium salt of an amine and alkylating ester of an acid of phosphorus latent heat-activatable catalyst.
Claim 2
Dependent Claim
66 words
A composition which is storage stable at room temperature which crosslinks very quickly when exposed to a temperature of 60° C. or higher comprising: (a) an organic polyisocyanate, (b) a compound containing at least two isocyanatereactive groups and having a molecular weight of from 400 to 10,000 and (c) an ammonium salt of an amine and alkylating ester of an acid of phosphorus latent heat-activatable catalyst.
Claim 3
Dependent Claim
36 words
The composition of claim 1 in which the ammonium salt (c) is formed from an amine in which the amino nitrogen is bonded to non-aromatic carbon atoms and an alkylating ester of an acid of phosphorus.
Claim 4
Dependent Claim
26 words
The composition of claim 1 in which the ammonium salt (c) is formed from an amine and an alkylating ester of phosphoric, phosphorus or phosphonic acid.
Claim 5
Dependent Claim
22 words
The composition of claim 3 in which the amine contains a nitrogen atom attached by three single bonds to non-aromatic carbon atoms.
Claim 6
Dependent Claim
20 words
The composition of claim 4 in which the amine and alkylating ester are used in an equivalent ratio of 1:1.
Claim 7
Dependent Claim
30 words
The composition of claim 1 in which the ammonium salt (c) is formed by reacting amine with alkylating ester of an acid of phosphorus in an equivalent ratio of 1:1.
Claim 8
Dependent Claim
61 words
A process for the production of polyisocyanate addition products comprising heating a mixture of (a) an organic polyisocyanate, (b) a compound containing at least two isocyanate-reactive groups and having a molecular weight of from 400 to 10,000 and (c) a catalyst formed from an amine and alkylating ester of an acid of phosphorus to a temperature of 60° C. or higher.
Claim 9
Dependent Claim
61 words
A process for the production of polyisocyanate addition products comprising heating a mixture of (a) an organic polyisocyanate, (b) a compound containing at least two isocyanate-reactive groups and having a molecular weight of from 400 to 10,000 and (c) a catalyst formed from an amine and alkylating ester of an acid of phosphorus to a temperature of 60° C. or higher.
Claim 10
Dependent Claim
28 words
The process of claim 7 in which catalyst (c) is formed by reacting amine and alkylating ester of an acid of phosphorus in an equivalent ratio of 1:1.
Claim 11
Dependent Claim
41 words
The process of claim 7 in which the mixture of (a), (b) and (c) is applied to at least one of two heat-resistant substrates to be bonded together before that mixture is heated to a temperature of 60° C. or higher.
References Cited (Backward Citations)
US4331778A
Cited
US4257995A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-03 | 1988-12-03 | 1989-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-03 | 1992-12-03 | 1993-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-03 | 1996-12-03 | 1997-06-04 | $7700.00 | Window Closed / Lapsed |