US4500696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder surface coatings
Assignee: Huels AG
•
Filing: 1984-06-19
•
Granted: 1985-02-19
•
Expires: 2004-06-19
Abstract
Abstract Powder surface coatings of polyols and a polyisocyanate component, wherein blocked adducts of 2-methyl-1,5-pentanediisocyanate, 2-ethyl-1,4-butane diisocyanate or a mixture thereof are used is the polyisocyanate component, according to the formulas (I) and (II): ##STR1## wherein the diisocyanate mixture of (I) and (II) has about 88 to 99% by weight of (I) and about 12 to 1% by weight of (II), and wherein the latent NCO content of the blocked adducts is about 7 to 18% by weight, and the free NCO content is less than or equal to 2% by weight.
Inventors
- 👤 Rainer Gras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:23
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/792; C08G18/73; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8022; C08G18/8025; C08G18/8061; C08G2150/00; C08G2150/20
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
87 words
Powder surface coatings comprising polyols and a polyisocyanate component, wherein said polyisocyanate component comprises blocked adducts of 2-methyl-1,5-pentanediisocyanate, 2-ethyl-1,4-butanediisocyanate or a mixture thereof according to formulas (I) and (II): ##STR3## wherein the diisocyanate mixture of (I) and (II) has about 88 to 99% by weight of (I) and about 12 to 1% by weight of (II), and wherein the latent NCO content of said blocked adducts is about 7 to 18% by weight, and the free NCO content is less than or equal to 2% by weight.
Claim 2
Dependent Claim
87 words
Powder surface coatings comprising polyols and a polyisocyanate component, wherein said polyisocyanate component comprises blocked adducts of 2-methyl-1,5-pentanediisocyanate, 2-ethyl-1,4-butanediisocyanate or a mixture thereof according to formulas (I) and (II): ##STR3## wherein the diisocyanate mixture of (I) and (II) has about 88 to 99% by weight of (I) and about 12 to 1% by weight of (II), and wherein the latent NCO content of said blocked adducts is about 7 to 18% by weight, and the free NCO content is less than or equal to 2% by weight.
Claim 3
Dependent Claim
37 words
The powder surface coatings of claim 1, wherein said latent NCO content of said blocked adducts is about 9.5 to 16% by weight, and the free NCO content of less than or equal to 1% by weight.
Claim 4
Dependent Claim
29 words
The powder surface coatings of claim 1, wherein said adduct is the trimer of MPDI or MPDI/EBDI mixture, having a NCO content of about 14 to 21% by weight.
Claim 5
Dependent Claim
29 words
The powder surface coatings of claim 3, wherein said adduct is the trimer of MPDI or MPDI/EBDI mixture, having a NCO content of about 15.5 to 19.5% by weight.
Claim 6
Dependent Claim
37 words
The powder surface coatings of claim 1, wherein said adduct is the reaction product of MPDI or MPDI/EBDI mixture with tetra or higher functional polyols and has a NCO content of about 10 to 22% by weight.
Claim 7
Dependent Claim
37 words
The powder surface coatings of claim 6, wherein said adduct is the reaction product of MPDI or MPDI/EBDI mixture with tetra or higher functional polyols and has a NCO content of about 12 to 19% by weight.
Claim 8
Dependent Claim
44 words
The powder surface coatings of claim 1, wherein the binder ratio is about 9 to 45% by weight of MPDI or MPDI/EBDI adduct and about 91 to 55% by weight of polyester containing hydroxyl groups, wherein the OH/NCO ratio is about 1:0.8 to 1:1.2.
Claim 9
Dependent Claim
16 words
The powder surface coatings of claim 7, wherein the OH/NCO ratio is about 1:0.95 to 1:1.1.
Claim 10
Dependent Claim
23 words
The powder surface coatings of claim 1, wherein said polyol component is an epoxy and the OH/NCO ratio is about 1:0.25 to 1:0.75.
Claim 11
Dependent Claim
16 words
The powder surface coatings of claim 9, wherein the OH/NCO ratio is about 1:0.35 to 1:0.55.
Claim 12
Dependent Claim
17 words
The powder surface coatings of claim 1, wherein said polyisocyanate component is blocked with ε-caprolactam and 1H-1,2,4-triazole.
Claim 13
Dependent Claim
28 words
The powder surface coatings of claim 1, wherein said polyols comprise polyesters, epoxy resins and acrylates having hydroxyl groups, having a molecular weight of about 800 to 10,000.
Claim 14
Dependent Claim
26 words
The powder surface coatings of claim 12, wherein said polyesters are the polyesters of terephthalic acid with the alcohols hexamethylene glycol, neopentyl glycol, 1,4-dimethanolcyclohexane and 2,2,2-trimethylolpropane.
Claim 15
Dependent Claim
19 words
The powder surface coatings of claim 5, wherein said tetra or higher functional polyols are ditrimethylolpropane, pentaerythritol and sorbitol.
References Cited (Backward Citations)
US4354014A
Cited
US4383076A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |