US4400497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Storage stable, heat curable mixtures of polyisocyanate and polyol and process for their manufacture and use
Assignee: BASF SE
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Filing: 1982-03-11
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Granted: 1983-08-23
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Expires: 2002-03-11
Abstract
Abstract The invention relates to mixtures comprising of (a) a polyisocyanate in the form of discrete particles having diameters of 0.1 to 150 microns which are deactivated at their surface such that from 0.5 to 20 equivalent percent of the total isocyanate groups present are deactivated; and (b) a polyol. These mixtures are useful as coatings and adhesives as well as gasket materials and are particularly useful as undercoating materials for automotive vehicles.
Inventors
- 👤 Rainer Blum
- 👤 August Lehner
- 👤 Hans-Uwe Schenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:02
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/08; C08G18/703; C08G18/705; C08G18/707; C08G18/77; C08G18/78; C08G18/79; C08G18/798; C08G2190/00; Y; Y10; Y10S; Y10S528/00; Y10S528/902
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
46 words
A mixture comprising (a) a polyisocyanate in the form of discrete particles having diameters of 0.1 micron to 150 microns which are deactivated at their surface such that from 0.5 to 20 equivalent percent of the total isocyanate groups present are deactivated; and (b) a polyol.
Claim 2
Dependent Claim
46 words
A mixture comprising (a) a polyisocyanate in the form of discrete particles having diameters of 0.1 micron to 150 microns which are deactivated at their surface such that from 0.5 to 20 equivalent percent of the total isocyanate groups present are deactivated; and (b) a polyol.
Claim 3
Dependent Claim
13 words
The mixture of claim 1 wherein the polyisocyanate is a dimeric toluene diisocyanate.
Claim 4
Dependent Claim
15 words
The mixture of claim 1 wherein the polyol is a hydroxyl group containing polyacrylate resin.
Claim 5
Dependent Claim
22 words
The mixture of claim 1, 2, and 3 wherein said polyisocyanate has been deactivated with a primary or secondary amine or water.
Claim 6
Dependent Claim
25 words
The mixture of claim 4 wherein the ratio of isocyanate groups of the polyisocyanate to hydroxyl groups of the polyol is from 0.9:1 to 1:09.
Claim 7
Dependent Claim
22 words
The mixture of claim 5 wherein said mixture is prepared by dispersing the polyisocyanate in the polyol at temperatures below 40° C.
Claim 8
Dependent Claim
22 words
The mixture of claim 6 wherein said mixture is prepared by adding the deactivating agent to the mixture of polyisocyanate and polyol.
Claim 9
Dependent Claim
25 words
The mixture of claim 5 wherein said mixture is prepared by adding the deactivating agent to the polyol before mixing the polyol with the polyisocyanate.
Claim 10
Dependent Claim
22 words
A process for coating a metal comprising (a) applying the mixture of claim 1 to said metal; and (b) curing the mixture.
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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |