US4354014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powdered coating compositions having good storage stability and production of same
Assignee: Huels AG
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Filing: 1980-07-01
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Granted: 1982-10-12
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Expires: 2000-07-01
Abstract
Abstract Powdered coating compositions having good storage stability and particle size smaller than 0.25 mm, particularly 0.02 and 0.06 mm, based on polyesters which contain hydroxyl groups and melt between 40 DEG -120 DEG C., epsilon -caprolactam blocked isophorondiisocyanate adducts, and catalysts, if necessary, and customary additives, wherein isophoronediisocyanate adducts partially blocked with epsilon -caprolactam are used as curing agents. Methods for producing the above mentioned powdered coating compositions, wherein the polyesters containing hydroxyl groups are reacted in the melt or in solvents at temperatures of 0 DEG -150 DEG C., particularly 80 DEG -120 DEG C., with an isophorondiisocyanate adduct blocked with epsilon -caprolactam which contains 0.1 to 1 mole of free NCO-groups per mole of adduct and 0.4-1.1 NCO-equivalents separate to OH equivalent.
Inventors
- 👤 Elmar Wolf
- 👤 Rainer Gras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:05
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/04; C09D175/06; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/792; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8032; C08G18/8041; C08G18/8061; C08G18/807; C08G18/8074; C08G2150/00; C08G2150/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
Powdered coating compositions having good storage stability and particle size smaller than 0.25 mm, comprising the reaction product of polyesters which contain hydroxyl groups and melt between 40°-120° C., and ε-caprolactam partially blocked isophorondiisocyanate adducts, and catalysts, if necessary, and customary additives, wherein said isophoronediisocyanate adducts partially blocked with ε-caprolactam contain 0.1 to 1 mole of free NCO-groups per mole of adduct and are selected from the group consisting adduct containing urea groups and having an NCO-content of 22-35% weight; adduct containing biuret groups and having an NCO-content of 20-35% by weight; adduct containing carbodiimide groups and having an NCO-content of 22-35% by weight and an adduct which contains urea and urethane groups and which comprises the reaction product of isophoronediisocyanate and 1-hydroxy-3-aminomethyl-3,5,5-trimethylcyclohexane.
Claim 2
Dependent Claim
123 words
Powdered coating compositions having good storage stability and particle size smaller than 0.25 mm, comprising the reaction product of polyesters which contain hydroxyl groups and melt between 40°-120° C., and ε-caprolactam partially blocked isophorondiisocyanate adducts, and catalysts, if necessary, and customary additives, wherein said isophoronediisocyanate adducts partially blocked with ε-caprolactam contain 0.1 to 1 mole of free NCO-groups per mole of adduct and are selected from the group consisting adduct containing urea groups and having an NCO-content of 22-35% weight; adduct containing biuret groups and having an NCO-content of 20-35% by weight; adduct containing carbodiimide groups and having an NCO-content of 22-35% by weight and an adduct which contains urea and urethane groups and which comprises the reaction product of isophoronediisocyanate and 1-hydroxy-3-aminomethyl-3,5,5-trimethylcyclohexane.
Claim 3
Dependent Claim
59 words
Method for producing the above mentioned powdered coating compositions according to claim 1, wherein the polyesters containing hydroxyl groups are reacted in the melt or in solvents at temperature of 0°-150° C., with an isophoronediisocyanate adduct partially blocked with ε-caprolactam which contains 0.1 to 1 mole of free NCO-groups per mole of adduct and 0.4-1.1 NCO-equivalents per OH equivalent.
Claim 4
Dependent Claim
29 words
The composition of claim 1 wherein said partially blocked adduct is an adduct which contains urea and urethane groups and which comprises the reaction product of isophorenediisocyanate and 1-hydroxy-3-aminomethyl-3,5,5-trimethylcyclohexane.
Claim 5
Dependent Claim
21 words
The composition of claim 1 wherein said adduct is one containing urea groups and having an NCO-content of 22-35% by weight.
Claim 6
Dependent Claim
21 words
The composition of claim 1 wherein said adduct is one containing biuret groups and having an NCO-content of 20-35% by weight.
Claim 7
Dependent Claim
21 words
The composition of claim 1 wherein said adduct is one containing carbodiimide groups and having an NCO-content of 22-35% by weight.
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) | 1985-10-11 | 1986-04-12 | 1986-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-11 | 1990-04-12 | 1990-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-11 | 1994-04-12 | 1994-10-12 | $7700.00 | Window Closed / Lapsed |