US4208488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting compositions
Assignee: Hoechst AG
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Filing: 1978-02-15
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Granted: 1980-06-17
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Expires: 1998-02-15
Abstract
Abstract A thermosetting coating or adhesive composition based on (A) at least one component selected from the group consisting of oligomeric and polymeric compounds containing at least one of the functional groups hydroxyl and epoxy groups, and (B) a polycarboxylic acid mixture comprising trimellitic acid and a major amount of at least one compound of one of the formulae ##STR1## wherein R, R' and R'", being the same or different, each represents a di- to hexavalent hydrocarbon radical having a total of from 1 to 12 carbon atoms, said radical containing from zero to 2 olefinic double bonds, said radical without double bonds being interrupted by up to 3 ether bridges: x and y which may be the same or different, each represents an integer of from 2 to 6; t an integer of from 1 to 5; and z and u, which may be the same or different, each represents zero or an integer of from 1 to 5 and a process for coating a substrate with said composition.
Inventors
- 👤 Kurt Kraft
- 👤 Gerd Walz
- 👤 Thaddaus Wirth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 02:59
CPC Classifications
C; C09; C09D; C09D167/00; C08; C08K; C08K5/00; C08K5/04; C09J; C09J167/00; C08L; C08L2666/00; C08L2666/02; C08L2666/28
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
158 words
A thermosetting coating or adhesive composition (A) at least one component selected from the group consisting of oligomeric and polymeric compounds containing at least one of the functional groups hydroxyl and epoxy groups, and (B) a polycarboxylic acid mixture comprising trimellitic acid and a major amount of at least one compound of one of the formulae ##STR6## wherein R, R' and R'", being the same or different, each represents a di- to hexavalent aliphatic hydrocarbon radical having a total of from 1 to 12 carbon atoms, said radical containing from zero to 2 olefinic double bonds, said radical without double bonds being interrupted by up to 3 ether bridges; x and y which may be the same or different, each represents an integer of from 2 to 6; t an integer of from 1 to 5; and z and u, which may be the same or different, each represents zero or an integer of from 1 to 5.
Claim 2
Dependent Claim
158 words
A thermosetting coating or adhesive composition (A) at least one component selected from the group consisting of oligomeric and polymeric compounds containing at least one of the functional groups hydroxyl and epoxy groups, and (B) a polycarboxylic acid mixture comprising trimellitic acid and a major amount of at least one compound of one of the formulae ##STR6## wherein R, R' and R'", being the same or different, each represents a di- to hexavalent aliphatic hydrocarbon radical having a total of from 1 to 12 carbon atoms, said radical containing from zero to 2 olefinic double bonds, said radical without double bonds being interrupted by up to 3 ether bridges; x and y which may be the same or different, each represents an integer of from 2 to 6; t an integer of from 1 to 5; and z and u, which may be the same or different, each represents zero or an integer of from 1 to 5.
Claim 3
Dependent Claim
37 words
A composition as claimed in claim 1 wherein component B comprises from 70 to 99.9% by weight of the total of compounds of formula I to III and from 0.1 to 30% by weight of trimetallic acid.
Claim 4
Dependent Claim
32 words
A composition as claimed in claim 1 wherein the quantity of component B is from 3 to 60% by weight and that of component A is from 40 to 97% by weight.
Claim 5
Dependent Claim
40 words
A composition as claimed in claim 1 wherein component A comprises a compound selected from the group consisting of a polyester having free hydroxy groups and epoxy resin having an epoxy value between 0.02 and 0.35 and a combination thereof.
Claim 6
Dependent Claim
34 words
A composition as claimed in claim 1 wherein component A comprises a mixture of hydroxyl and epoxy compounds and the weight ratio of hydroxyl compounds to epoxy compounds is (20 to 100):(80 to 0).
Claim 7
Dependent Claim
45 words
A composition as claimed in claim 1 wherein component B comprises a compound of formula I formed from trimellitic acid anhydride with a di- to hexahydric alcohol having from 2 to 12 carbon atoms and by subsequent hydrolysis of anhydride groups contained in the mixture.
Claim 8
Dependent Claim
49 words
A composition as claimed in claim 1 additionally comprising (C) selected from the group consisting of a homopolymer, copolymer and mixture thereof copolymer derived from vinyl monomers having up to 2 fluorine atoms and the weight ratio of the sum of components (A)+(B) to (C) is 9:1 to 1:9.
Claim 9
Dependent Claim
14 words
A composition as claimed in claim 7 wherein component (A) contains free hydroxy groups.
Claim 10
Dependent Claim
21 words
A composition as claimed in claim 7 wherein the fluorine content of component (C) is from 40 to 60% by weight.
Claim 11
Dependent Claim
26 words
A composition as claimed in claim 1 additionally containing a catalyst in an amount between 0.01 and 5% by weight, referred to the total solids content.
Claim 12
Dependent Claim
13 words
A composition as claimed in claim 1 which is a powdered coating composition.
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) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |