US3853822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powdered stoving lacquer
Assignee: DEUTSCHE GOLD und SILBER SCHEIDEANSTALT DT
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Filing: 1973-07-24
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Granted: 1974-12-10
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Expires: 1993-07-24
Abstract
Abstract A powdered stoving lacquer comprising A. an acrylic resin prepared by free radical substance polymerization of A. ABOUT 35 - 60 PERCENT BY WEIGHT OF AT LEAST ONE ESTER OF METHACRYLIC ACID, THE HOMOPOLYMERIZATION PRODUCT OF WHICH HAS A GLASS TRANSITION TEMPERATURE OF AT LEAST ABOUT 80*C, b. about 5 - 40 percent by weight of at least one ester of acrylic acid or methacrylic acid, the homopolymerization product of which has a glass transition temperature below about 40*C, c. about 20 - 40 percent by weight of at least one hydroxyalkyl ester of acrylic acid of methacrylic acid, and D. ABOUT 0 - 10 PERCENT BY WEIGHT OF AT LEAST ONE COPOLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, ACRYLONITRILE, ACRYLAMIDE, DIACETONE ACRYLAMIDE, METHACRYLIC ACID AND ACRYLIC ACID, AND B. at least one aliphatic, cycloaliphatic or araliphatic diisocyanate or a monoadduct of such diisocyanate with a multivalent alcohol, the isocyanate groups in each case being blocked with a lactam having about 4 - 12 carbon atoms in the ring, in an amount of about 0.2 - 0.6 equivalents of isocyanate groups based on the content of hydroxyl groups in the acrylic resin.
Inventors
- 👤 G Brod
- 👤 W Felber
- 👤 H Leistner
- 👤 G Morlock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:57
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G18/8074; C08G2150/00; C08G2150/20; Y; Y10; Y10S; Y10S526/00; Y10S526/934
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
265 words
A POWDERED STOVING LACQUER COMPRISING: A. AN ACRYLIC RESIN REACTION PRODUCT FROM THE FREE RADICAL SUBSTANCE POLYMERIZATION OF A MONOMER MIXTURE COMPRISING: A. ABOUT 35 - 60 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE ESTER OF METHACRYLIC ACID, THE HOMOPOLYMERIZATION PRODUCT OF WHICH HAS A GLASS TRANSITION TEMPERATURE OF AT LEAST ABOUT 80*C, B. ABOUT 5 - 40 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE ESTER OF ACRYLIC ACID OR METHACRYLIC ACID, THE HOMOPOLYMERIZATION PRODUCT OF WHICH HAS A GLASS TRANSITION TEMPERATURE BELOW ABOUT 40*C, C. ABOUT 20 - 40 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE HYDROXYALKYL ESTER OF ACRYLIC ACID OR METHACRYLIC ACID, AND D. ABOUT 0 - 10 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE COPOLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, ACRYLONITRILE, ACRYLAMIDE, DIACETONE ACRYLAMIDE, METHACRYLIC ACID AND ACRYLIC ACID, AND E. ABOUT 0.5 - 2. 5 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE THIOGLYCOLIC ACID ESTER OF A BI-, TRI- OR TETRAVALENT ALCOHOL; AND B. AT LEAST ONE ALIPHATIC, CYCLOALIPHATIC OR ARALIPHATIC DIISOCYANATE OR A MONOADDUCT OF SUCH DIISOCYANATE WITH A MULTIVALENT ALCOHOL, THE ISOCYANATE GROUPS IN EACH CASE BEING BLOCKED WITH A LACTAM HAVING ABOUT 4 - 12 CARBON ATOMS IN THE RING, IN AN AMOUNT OF ABOUT 0.2 - 0.6 EQUIVALENT OF ISOCYANATE GROUPS BASED ON THE CONTENT OF HYDROXYL GROUPS IN THE ACRYLIC RESIN.
Claim 2
Dependent Claim
265 words
A POWDERED STOVING LACQUER COMPRISING: A. AN ACRYLIC RESIN REACTION PRODUCT FROM THE FREE RADICAL SUBSTANCE POLYMERIZATION OF A MONOMER MIXTURE COMPRISING: A. ABOUT 35 - 60 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE ESTER OF METHACRYLIC ACID, THE HOMOPOLYMERIZATION PRODUCT OF WHICH HAS A GLASS TRANSITION TEMPERATURE OF AT LEAST ABOUT 80*C, B. ABOUT 5 - 40 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE ESTER OF ACRYLIC ACID OR METHACRYLIC ACID, THE HOMOPOLYMERIZATION PRODUCT OF WHICH HAS A GLASS TRANSITION TEMPERATURE BELOW ABOUT 40*C, C. ABOUT 20 - 40 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE HYDROXYALKYL ESTER OF ACRYLIC ACID OR METHACRYLIC ACID, AND D. ABOUT 0 - 10 PERCENT BY WEIGHT, BASED ON THE WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE COPOLYMERIZABLE MONOMER SELECTED FROM THE GROUP CONSISTING OF STYRENE, ACRYLONITRILE, ACRYLAMIDE, DIACETONE ACRYLAMIDE, METHACRYLIC ACID AND ACRYLIC ACID, AND E. ABOUT 0.5 - 2. 5 PERCENT BY WEIGHT, BASED ON THE TOTAL WEIGHT OF THE MONOMER MIXTURE, OF AT LEAST ONE THIOGLYCOLIC ACID ESTER OF A BI-, TRI- OR TETRAVALENT ALCOHOL; AND B. AT LEAST ONE ALIPHATIC, CYCLOALIPHATIC OR ARALIPHATIC DIISOCYANATE OR A MONOADDUCT OF SUCH DIISOCYANATE WITH A MULTIVALENT ALCOHOL, THE ISOCYANATE GROUPS IN EACH CASE BEING BLOCKED WITH A LACTAM HAVING ABOUT 4 - 12 CARBON ATOMS IN THE RING, IN AN AMOUNT OF ABOUT 0.2 - 0.6 EQUIVALENT OF ISOCYANATE GROUPS BASED ON THE CONTENT OF HYDROXYL GROUPS IN THE ACRYLIC RESIN.
Claim 3
Dependent Claim
13 words
Stoving lacquer according to claim 1 in which component (a) is methyl methacrylate.
Claim 4
Dependent Claim
28 words
Stoving lacquer according to claim 2 in which component (c) is a hydroxyalkyl ester of methacrylic acid having about 2 - 4 carbon atoms in the hydroxyalkyl group.
Claim 5
Dependent Claim
62 words
Stoving lacquer according to claim 1 in which the thioglycolicacid ester is about 1.0 - 2.0 weight percent, based on the weight of the monomer mixture, of a compound selected from the group consisting of thioglycolic acid esters of ethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, glycerin, tri-methylol propane, pentaerythrite, diethylene glycol, triethylene glycol and tetraethylene glycol.
Claim 6
Dependent Claim
16 words
Stoving lacquer according to claim 1 in which the blocked diisocyanate is blocked with epsilon -caprolactam.
Claim 7
Dependent Claim
29 words
Stoving lacquer according to claim 1 in which the diisocyanate is hexamethylene diisocyanate, octamethylene diisocyanate, decamethylene diisocyanate, dodecamethylene diisocyanate, omega , omega ''-diisocyanate-1,4-dimethyl benzene (p-xylene diisocyanate and isophorone diisocyanate.
Claim 8
Dependent Claim
51 words
Stoving lacquer according to claim 1 in which the diisocyanate is an adduct selected from the group consisting of the adducts of two moles of isophorone diisocyanate with one mole of 1,6-hexanediol, two moles of isophorone diisocyanate with one mole neopentylglycol, three moles of isophorone diisocyanate with one mole trimethylol propane.
Claim 9
Dependent Claim
19 words
Stoving lacquer according to claim 3 in which component (b) is butyl acrylate and component (c) is 2-hydroxyethyl methacrylate.
Claim 10
Dependent Claim
22 words
Stoving lacquer according to claim 3 in which component (b) is 2-ethyl hexylacrylate and component (c) comprises 2-hydroxyethyl methacrylate and 2-hydroxypropyl methacrylate.
Claim 11
Dependent Claim
23 words
Stoving lacquer according to claim 3 in which component (b) is butyl acrylate, component (c) is 2-hydroxypropyl methacrylate and component (d) is styrene.
Claim 12
Dependent Claim
12 words
Stoving lacquer according to claim 9 in which component (d) is acrylonitrile.
Claim 13
Dependent Claim
16 words
Stoving lacquer according to claim 1 in which component (A) is neopentyl methacrylate or cyclohexyl methacrylate.
Claim 14
Dependent Claim
31 words
Stoving lacquer according to claim 1 in which component (B) is an alkyl ester of acrylic acid or methacrylic acid having about 2 - 10 carbon atoms in the alkyl group.
Claim 15
Dependent Claim
27 words
Stoving lacquer according to claim 13 in which the alkyl ester of acrylic or methacrylic acid has about 4 - 10 carbon atoms in the alkyl group.
Claim 16
Dependent Claim
37 words
Stoving lacquer according to claim 3 in which component (B) is ethyl acrylate, n-butyl acrylate, hexyl acrylate, 2-ethyl hexylacrylate, n-octyl acrylate, decyl acrylate, ethyl methacrylate, n-butyl methacrylate, hexyl methacrylate, 2-ethyl hexyl methacrylate, n-octyl methacrylate or decyl methacrylate.
Claim 17
Dependent Claim
48 words
Stoving lacquer according to claim 13 in which the ester of acrylic or methacrylic acid has 2 or 3 carbon atoms in the alcohol component, and the proportion of such esters having 2 or 3 carbon atoms does not exceed about 25 percent by weight of component (B).
Claim 18
Dependent Claim
28 words
Stoving lacquer according to claim 1 in which component (B) is a hydroxyalkyl ester of acrylic acid having about 2 - 4 carbon atoms in the hydroxyalkyl group.
Claim 19
Dependent Claim
28 words
Stoving lacquer according to claim 1 in which component (C) is a 2-hydroxy ethyl ester, 2-hydroxy propyl ester, or 4-hydroxy butyl ester of acrylic acid or methacrylic acid.
Claim 20
Dependent Claim
40 words
Stoving lacquer according to claim 1 in which component (C) is a hydroxy alkyl ester of acrylic acid, and the proportion of such hydroxy alkyl esters of acrylic acid in component (C) does not exceed about 25 percent by weight.
Claim 21
Dependent Claim
28 words
Stoving lacquer according to claim 1 in which the thiogylcol acid ester is an ester of an alcohol, the molecular weight of which is about 62 - 200.
Claim 22
Dependent Claim
27 words
Stoving lacquer according to claim 1 in which the diisocyanate is an adduct of hexamethylene diisocyanate or p-xylene diisocyanate and trimethylol propane, said diisocyanate blocked with epsilon-caprolactam.
Claim 23
Dependent Claim
58 words
Stoving lacquer according to claim 1 in which the acrylic resin reaction product is prepared in two steps, the first step being the polymerization of the monomer mixture at a temperature of about 60*- 120*C to form a syrupy preliminary polymerized product; and the second step being hardening of the syrupy product at temperatures of about 70*- 100*C.
Claim 24
Dependent Claim
22 words
Stoving lacquer according to claim 22 in which the hardened syrupy product is subjected to a subsequent heating at about 100*- 120*C.
Claim 25
Dependent Claim
37 words
Stoving lacquer according to claim 22 in which the acrylic resin product is prepared in the presence of a radical catalyst selected from the group consisting of peroxides and azo compounds having decomposition temperatures below about 100*C.
Claim 26
Dependent Claim
57 words
Stoving lacquer according to claim 24 in which the catalyst is selected from the group consisting of : tertbutylperpivalate, tert. butyl perisobutyrate, tert. butyl peroctoate, benzoyl peroxide, monochlorobenzoyl peroxide, dichlorobenzoyl peroxide, diacetyl peroxide, lauroyl peroxide, cyclohexanone hydroperoxide, diisopropyl peroxydicarbonate, cyclohexyl peroxydicarbonate, diisooctyl peroxydicarbonate, acetyl cyclohexyl sulfonyl peroxide, acetyl isopropyl sulfonyl peroxide, azo-bis-isobutyric acid nitrile and azo-bis-(2,4-dimethyl) valeronitrile.
Claim 27
Dependent Claim
15 words
Powdered stoving lacquer according to claim 1 in which the monomer mixture includes component (B).
References Cited (Backward Citations)
US3542741A
Cited
US3676405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |