US4330657A
Expired / Lapsed
US
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Process for the production of storage-stable urethane acryls
Assignee: Huels AG
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Filing: 1979-12-17
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Granted: 1982-05-18
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Expires: 1999-12-17
Abstract
Abstract A process of producing storage-stable urethane acryls which comprises: (A) forming a prepolymer by reacting one isocyanate group of a cycloaliphatic diisocyanate having two isocyanate groups of substantially different reactivity, with a single NCO reactive hydroxy group-containing acrylic compound which is additionally polymerizable; (B) reacting said prepolymer with a multifunctional polyol to thereby obtain a substantially NCO-free urethane acryl. Acryl urethanes produced can be used as hot melts or in mixtures with reactive diluents for coatings of plastics, metals, wood, pressboards, glass, leather, concrete, and the like.
Inventors
- 👤 Josef Disteldorf
- 👤 Werner Flakus
- 👤 Horst Schnurbusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:50
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/753; C08G18/755; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08G18/8175; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
A process for producing storage-stable urethane lacquers which comprises: (A) forming a prepolymer by reacting one isocyanate group of a cycloaliphatic diisocyanate having 2 isocyanate groups of substantially different reactivity, with the hydroxy group of a mono hydroxy group containing acrylic compound which is polymerizable by addition, wherein the temperature is about 0°-50° C. and the reaction is carried out in the presence of 0.001-0.01% by weight on the basis of tin of an organic tin catalyst; (B) reacting said prepolymer with a multifunctional polyol or mixtures thereof, in an equivalent ratio of NCO:OH of 2:1, in the presence of 0.01-0.1% by weight on the basis of tin of an organic tin catalyst; to thereby obtain a substantially NCO-free urethane acryl.
Claim 2
Dependent Claim
121 words
A process for producing storage-stable urethane lacquers which comprises: (A) forming a prepolymer by reacting one isocyanate group of a cycloaliphatic diisocyanate having 2 isocyanate groups of substantially different reactivity, with the hydroxy group of a mono hydroxy group containing acrylic compound which is polymerizable by addition, wherein the temperature is about 0°-50° C. and the reaction is carried out in the presence of 0.001-0.01% by weight on the basis of tin of an organic tin catalyst; (B) reacting said prepolymer with a multifunctional polyol or mixtures thereof, in an equivalent ratio of NCO:OH of 2:1, in the presence of 0.01-0.1% by weight on the basis of tin of an organic tin catalyst; to thereby obtain a substantially NCO-free urethane acryl.
Claim 3
Dependent Claim
15 words
The process of claim 1, wherein the temperature of said step (A) is 20°-25° C.
Claim 4
Dependent Claim
29 words
The process of claim 1, wherein the organic tin catalyst present in said step (A) is present in an amount of 0.002% by weight, on the basis of tin.
Claim 5
Dependent Claim
16 words
The process of claim 1, wherein the temperature of said step (B) is about 70° C.
Claim 6
Dependent Claim
25 words
The process of claim 1, wherein the organic tin catalyst in said step (B) is present in an amount of 0.02% by weight of tin.
Claim 7
Dependent Claim
12 words
The process of claim 1, wherein said cycloaliphatic diisocyanate is isophorone diisocyanate.
Claim 8
Dependent Claim
31 words
The process of claim 1, wherein said hydroxy group-containing acrylic compound is selected from the group consisting of hydroxy (lower) alkylacrylate, hydroxy (lower) alkylmethacrylate, N-hydroxy (lower) alkylacrylamide, and N-hydroxy (lower) alkylmethacrylamide.
Claim 9
Dependent Claim
26 words
The process of claim 1, wherein said organic tin catalyst is selected from the group consisting of dibutyl tin dilaurate, dibutyl tin acetate, and tin octoate.
Claim 10
Dependent Claim
13 words
The process of claim 8, wherein said tin catalyst is dibutyl tin dilaurate.
Claim 11
Dependent Claim
30 words
The process of claim 1, wherein said hydroxy group-containing unsaturated acrylic compound is selected from the group consisting of 2-hydroxyethylacrylate, 2-hydroxyethylmethacrylate, 2-hydroxypropylacrylate, 2-hydroxylpropylmethacrylate, N-hydroxymethylacrylamide, N-hydroxymethylmethacrylamide, diethyleneglycolmonoacrylate, diethyleneglycolmonomethylmethacrylate, glycerinedimethacrylate and trimethylolpropanedimethacrylate.
Claim 12
Dependent Claim
10 words
The urethane acryl prepared by the process of claim 1.
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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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |