US4788262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyisocyanate blends with improved compatibility with coreactants
Assignee: Bayer Corp
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Filing: 1986-12-08
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Granted: 1988-11-29
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Expires: 2006-12-08
Abstract
Abstract The present invention is directed to polyisocyanates which have improved compatibility with polyester coreactants and improved solubility in apolar solvents, the polyisocyanates containing, based on solids, (a) about 15 to 85 wt. % of an isocyanurate group-containing polyisocyanate based on hexamethylene diisocynate and (b) about 15 to 85 wt. % of a biuret group-containing polyisocyanate based on hexamethylene diisocyanate. The present invention is additionally directed to two-component polyurethane coating compositions based on the above polyisocyanates and branched polyester polyols. Finally, the present invention is directed to a process for preparing the polyisocyanate.
Inventors
- 👤 Peter H. Markusch
- 👤 James W. Rosthauser
- 👤 Michael C. Beatty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:09
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/792; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/721; C08G18/725; C08G18/7806; C08G18/7818; C08G18/7831; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
40 words
A polyisocyanate mixture which comprises, based on solids, (a) about 15 to 85 wt. % of an isocyanurate group-containing polyisocyanate based on hexamethylene diisocyanate and (b) about 15 to 85 wt. % of biuret group-containing polyisocyanate based on hexamethylene diisocyanate.
Claim 2
Dependent Claim
40 words
A polyisocyanate mixture which comprises, based on solids, (a) about 15 to 85 wt. % of an isocyanurate group-containing polyisocyanate based on hexamethylene diisocyanate and (b) about 15 to 85 wt. % of biuret group-containing polyisocyanate based on hexamethylene diisocyanate.
Claim 3
Dependent Claim
27 words
The polyisocyanate mixture of claim 1 which comprises about 50 to 80 wt. % of component (a) and about 20 to 50 wt. % of component (b).
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) | 1991-11-29 | 1992-05-30 | 1992-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-29 | 1996-05-30 | 1996-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-29 | 2000-05-30 | 2000-11-29 | $7700.00 | Window Closed / Lapsed |