Patent US4223097A successfully refreshed from Google Patents.
US4223097A
Expired / Lapsed
US
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Powder binder composition comprising an epoxy resin, a polyester resin and an accelerator
Assignee: Hoechst AG
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Filing: 1978-11-16
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Granted: 1980-09-16
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Expires: 1998-11-16
Abstract
Abstract A powder binder composition comprising a mixture of (I) an epoxy resin, (II) a hardener comprising a polyester having free carboxylic groups, and (III) from 0.05 to 5% by weight based on the weight of component II of an accelerator comprising at least one compound of the formulae ##STR1## wherein R represents a hydrogen atom or a C 1-4 alkyl group, R 1 represents a hydrogen atom or a nitro group, R 2 represents a hydrogen atom or a C 1-4 alkyl, C 2-4 alkenyl group or a phenyl group, R 3 represents a hydrogen atom or a C 1-7 alkyl group, R 4 represents a C 1-12 alkyl group or a phenyl group, R 5 represents a hydrogen atom or an aryl or C 1-6 alkyl group, and X represents a hydrogen atom or a vinyl or C 1-4 alkyl group and an article coated with said composition.
Inventors
- 👤 Gerhard Johannes
- 👤 Hermann Hotze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:35
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686; C09; C09D; C09D163/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
215 words
A powder binder composition comprising a mixture of (I) an epoxy resin based on polyhydric phenols and epihalohydrins, (II) a hardener comprising a polyester having free carboxylic groups, and which constituents of said polyester have been reacted during the polycondensation or polymerization with from 0.05 to 5% by weight based on the weight of constituents of component II of an accelerator comprising at least one compound of the formulae ##STR4## wherein R represents a hydrogen atom or a C 1-4 alkyl group, R 1 represents a hydrogen atom R 2 represents a hydrogen atom or a C 1-4 alkyl, C 2-4 alkenyl group or a phenyl group, R 3 represents a hydrogen atom or a C 1-7 alkyl group, R 4 represents a C 1-12 alkyl group or a phenyl group, R 5 represents a hydrogen atom or an aryl or C 1-6 alkyl group, and X represents a hydrogen atom or a vinyl or C 1-4 alkyl group, said polyester reactant II having an acid number between 100 and 200 is selected from the group consisting of (a) polyesters derived from polyols and an aromatic acid, or an aromatic acid containing at most 42.5% as much by weight of an aliphatic or cycloaliphatic acid and (b) a copolymer containing ester groups and carboxyl groups.
Claim 2
Dependent Claim
215 words
A powder binder composition comprising a mixture of (I) an epoxy resin based on polyhydric phenols and epihalohydrins, (II) a hardener comprising a polyester having free carboxylic groups, and which constituents of said polyester have been reacted during the polycondensation or polymerization with from 0.05 to 5% by weight based on the weight of constituents of component II of an accelerator comprising at least one compound of the formulae ##STR4## wherein R represents a hydrogen atom or a C 1-4 alkyl group, R 1 represents a hydrogen atom R 2 represents a hydrogen atom or a C 1-4 alkyl, C 2-4 alkenyl group or a phenyl group, R 3 represents a hydrogen atom or a C 1-7 alkyl group, R 4 represents a C 1-12 alkyl group or a phenyl group, R 5 represents a hydrogen atom or an aryl or C 1-6 alkyl group, and X represents a hydrogen atom or a vinyl or C 1-4 alkyl group, said polyester reactant II having an acid number between 100 and 200 is selected from the group consisting of (a) polyesters derived from polyols and an aromatic acid, or an aromatic acid containing at most 42.5% as much by weight of an aliphatic or cycloaliphatic acid and (b) a copolymer containing ester groups and carboxyl groups.
Claim 3
Dependent Claim
141 words
A composition as claimed in claim 1 wherein the compound of formula I is obtained by reaction of acetylacetone with hydrazine; the compound of formula II is prepared by reaction of an ester of acetoacetic acid with hydrazine; the compound of formula IV is prepared by the reaction of thiourea, an aldehyde selected from the group consisting of an aliphatic aldehyde and an amino compound selected from the group consisting of ammonia and an amine containing 1 to 12 carbon atoms, 4,6,6-trimethyl-2-thiono-1,2,3,6-tetrahydropyrimidine of formula V is prepared from an α,β-unsaturated compound of formula ##STR5## wherein R 4 and R 5 are as defined in claim 1 and thiourea; and the compound of formula VI is prepared by the reaction of an unsaturated monocarboxylic unit selected from the group consisting of crotonic, acrylic and methacrylic acid and the esters thereof with thiourea.
Claim 4
Dependent Claim
35 words
A composition as claimed in claim 1 wherein the proportion of alcohols or acids with a functionality greater than two in polyester (II) is at most 70 mol% of the alcohol or acid component respectively.
Claim 5
Dependent Claim
30 words
A composition as claimed in claim 1 wherein the polyester (II) comprises a polyester of terephthalic acid and a diol and the epoxy resin is based on 4,4-diphenylolpropane and epichlorohydrin.
Claim 6
Dependent Claim
23 words
A composition as claimed in claim 1 wherein the polyester is at least partially an ester group-containing copolymer additionally containing free carboxylic groups.
Claim 7
Dependent Claim
63 words
A composition as claimed in claim 1 wherein the polyester (II) is a copolymer based on (a) an at most dicarboxylic acid selected from the group consisting of acrylic, methacrylic, maleic and crotonic acid and (b) a copolymerisable monomer selected from the group consisting of an acrylic ester, methacrylic ester, acrylic amide, methacrylic amide, acrylonitrile and methacrylonitrile, an allyl compound, styrene and ethylene.
Claim 8
Dependent Claim
48 words
A composition as claimed in claim 1 wherein the epoxy resin has an epoxy value between 0.05 and 0.25, an epoxide equivalent weight between 500 to 1,500 and a viscosity (in 40% diethylene glycol monobutyl ether solution at 25° C.) in the range from 80 to 5,000 cP.
Claim 9
Dependent Claim
26 words
A composition as claimed in claim 1 wherein the weight ratio of the epoxy resin to the polyester is in the range from 80:20 to 20:80.
Claim 10
Dependent Claim
27 words
A composition as claimed in claim 1 wherein the melting point of the polyester and epoxy resin is above 50° C. and not higher than 150° C.
Claim 11
Dependent Claim
39 words
A composition as claimed in claim 1 additionally containing at least one substance selected from the group consisting of fillers, pigments and other conventional additives and wherein the powder composition has a particle size between 30 and 200 μm.
Claim 12
Dependent Claim
12 words
An article coated with a coating composition as claimed in claim 1.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |