EP0371242A2
Expired / Lapsed
EP
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Coating composition
Assignee: Dow Chemical Co
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Filing: 1989-10-17
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Granted: —
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Expires: 2009-10-17
Abstract
Abstract Substrates are coated with a composition comprising (A) a low molecular weight epoxy resin; (B) a phenolic hydroxyl-containing compound; (C) a converting resin such as a urea-formaldehyde resin; (D) a catalyst or accelerator; and (E) a flow modifier. The obtained substrates are particularly useful for making electrical laminates.
Inventors
- 👤 Ross C. Whiteside, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 18:06
CPC Classifications
C; C08; C08L; C08L63/00; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/182; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
212 words
A coating composition comprising (A) at least one relatively low molecular weight epoxy resin having an average of more than one, but not more than 2 vicinal epoxide groups per molecule; (B) at least one phenolic hydroxyl-containing compound having an average of more than one, but not more than two phenolic hydroxyl groups per molecule; (C) at least one converting resin or compound; (D) a catalyst for reacting the converting resin with the advanced epoxy resin which results when component (A) is reacted with component (B) upon heating the composition at a temperature of 130°C and above; and (E) at least one flow modifier; and wherein components (A) and (B) are present in amounts which provide a ratio of phenolic hydroxyl groups to vicinal epoxide groups of from 0.1:1 to 9:1; and component (C) is present in an amount of from 5 to 50 percent by weight based upon the combined weight of components (A), (B) and (C); component (D) is present in an amount of from 0.001 to 10 percent by weight based upon the combined weight of components (A), (B), (C) and (D); and component (E) is present in an amount of from 0.005 to 2 percent by weight based upon the combined weight of components (A), (B) and (C)
Claim 2
Dependent Claim
212 words
A coating composition comprising (A) at least one relatively low molecular weight epoxy resin having an average of more than one, but not more than 2 vicinal epoxide groups per molecule; (B) at least one phenolic hydroxyl-containing compound having an average of more than one, but not more than two phenolic hydroxyl groups per molecule; (C) at least one converting resin or compound; (D) a catalyst for reacting the converting resin with the advanced epoxy resin which results when component (A) is reacted with component (B) upon heating the composition at a temperature of 130°C and above; and (E) at least one flow modifier; and wherein components (A) and (B) are present in amounts which provide a ratio of phenolic hydroxyl groups to vicinal epoxide groups of from 0.1:1 to 9:1; and component (C) is present in an amount of from 5 to 50 percent by weight based upon the combined weight of components (A), (B) and (C); component (D) is present in an amount of from 0.001 to 10 percent by weight based upon the combined weight of components (A), (B), (C) and (D); and component (E) is present in an amount of from 0.005 to 2 percent by weight based upon the combined weight of components (A), (B) and (C)
Claim 3
Dependent Claim
100 words
A coating composition of Claim 1, wherein component (A) is an epoxy resin represented by the following formulas I or II wherein each A is independently a divalent hydrocarbyl group having suitably from 1 to 12, carbon atoms, -O-, -S-, -S-S-, -SO-, -SO₂-, or -CO-; each R is independently hydrogen or an alkyl group having from 1 to 3 carbon atoms; each X is independently hydrogen, a hydrocarbyl or hydrocarbyloxy group having from 1 to 12 carbon atoms or a halogen atom; n has a value of zero or 1; and n′ has an average value from zero to 25.
Claim 4
Dependent Claim
105 words
A coating composition of Claim 1, wherein component (B) is a phenolic hydroxyl-containing compound represented by the following formulas V or VI wherein each A is independently a divalent hydrocarbyl group having suitably from 1 to 12 carbon atoms, -O-, -S-, -S-S-, -SO-, -SO₂-, or -CO-; each R is independently hydrogen or an alkyl group having from 1 to 3 carbon atoms; each X is independently hydrogen, a hydrocarbyl or hydrocarbyloxy group having from 1 to 12 carbon atoms or a halogen atom, preferably chlorine or bromine: n has a value of zero or 1; and n′ has an average value from zero to 25.
Claim 5
Dependent Claim
36 words
A coating composition of Claim 1, wherein component (C) is selected from phenol-aldehyde resole resins, urea-aldehyde resins, melamine-aldehyde resins, alkylolated urea-aldehyde resins, alkylolated melamine-aldehyde resins, di- or polyisocyanates, blocked di- or polyisocyanates, or any combination thereof.
Claim 6
Dependent Claim
48 words
A coating composition of Claim 1, wherein the catalyst or accelerator is an inorganic acid, an organic acid having from 1 to 18 carbon atoms or a phosphate ester of an epoxy resin selected from the same group as component (A), a metal carboxylate or any combination thereof.
Claim 7
Dependent Claim
13 words
A coating composition of Claim 1, wherein component (D) is an inorganic acid.
Claim 8
Dependent Claim
13 words
A coating composition of Claim 1, wherein component (E) is a silicone resin.
Claim 9
Dependent Claim
21 words
A coating composition of Claim 6, wherein component (D) is phosphoric acid, dibutyl tin dilaurate, stannous octoate, or any combination thereof.
Claim 10
Dependent Claim
85 words
A coating composition of Claim 1, wherein (a) component (A) is a diglycidyl ether of bisphenol A; (b) component (B) is bisphenol A; (c) component (C) is methylolated urea-formaldehyde resins, methylolated melamine-formaldehyde resins, phenol-formaldehyde resole resins, allyl ether of methylolated phenol, toluene diisocyanate, methylene diphenyl diisocyanate, methyl ethyl ketoxime blocked toluene diisocyanate, methyl ethyl ketoxime blocked methylene diphenyl diisocyanate, or any combination thereof; (d) component (D) is phosphoric acid, dibutyl tin dilaurate, stannous octoate, or any combination thereof; (e) component (E) is a silicone resin.
Claim 11
Dependent Claim
51 words
A method for applying to substrates coating compositions comprising (i) at least one relatively high molecular weight epoxy resin; and (ii) at least one aliphatic hydroxyl-containing converting resin to substrates which method comprises (I) applying to the surface of a substrate, one or more applications of a composition of Claim 1.
References Cited (Backward Citations)
No citation records indexed.
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