US4212962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epsilon-caprolactam blocked polyisocyanates
Assignee: Veba Oel AG
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Filing: 1978-02-28
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Granted: 1980-07-15
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Expires: 1998-02-28
Abstract
Abstract Isophorone diisocyanate and reaction products of isophorone diisocyanate with polyols are substantially completely blocked with ε-caprolactam. The reaction product of isophorone diisocyanate and a polyol contains at least two isocyanate groups.
Inventors
- 👤 Karl Schmitt
- 👤 Josef Disteldorf
- 👤 Felix Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:57
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4219; A; A61; A61K; A61K31/00; A61K31/33; A61K31/335; A61K31/35; A61P; A61P37/00; A61P37/08; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/84; C07D311/86; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G18/8074; C09; C09D; C09D175/00; C09D175/04; C09D175/06; C08G2150/00; C08G2150/20; Y; Y10; Y10S; Y10S524/00; Y10S524/904; Y10S525/00; Y10S525/934; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
35 words
Epsilon-caprolactam blocked polyisocyanates in particulate form, said polyisocyanates being selected from the group of isophorone diisocyanate and the reaction product of isophorone diisocyanate and a polyol, said reaction product containing at least two isocyanate groups.
Claim 2
Dependent Claim
35 words
Epsilon-caprolactam blocked polyisocyanates in particulate form, said polyisocyanates being selected from the group of isophorone diisocyanate and the reaction product of isophorone diisocyanate and a polyol, said reaction product containing at least two isocyanate groups.
Claim 3
Dependent Claim
34 words
Blocked polyisocyanate of claim 1 wherein said polyol is selected from the group of ethylene glycol, propylene glycols, butanediols, hexanediols, heptanediol, octadecene-9,10-diol-(1,12), octadecanediol-(1,18), 2,4-dimethyl-2-propylheptanediol-(1,3), butene-diol-(1,4), diethylglycol, triethylglycol, trans-1,4-cyclohexanedimethanol, 1,4-cyclohexanediols, glycerine, hexanetriol-(1,2,6) and 1,1,1-trimethylol propane.
Claim 4
Dependent Claim
12 words
Urethane forming particulate coating composition comprising the blocked polyisocyanates of claim 1.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |