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US4134932A
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Surface-coating binders for cathodic electrocoating
Assignee: BASF SE
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Filing: 1978-03-09
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Granted: 1979-01-16
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Expires: 1998-03-09
Abstract
Abstract Surface-coating binders for cathodic electrocoating which comprise a protonized heat-curable reaction product (A), substantially free from epoxide groups, of (a) one or more Mannich bases, prepared from (a 1 ) one or more polyhydric condensed phenols which may or may not contain ether groups. (a 2 ) one or more secondary amines which contain one or more hydroxyalkyl groups, with or without one or more secondary amines which do not contain such groups, and (a 3 ) formaldehyde or a formaldehyde donor, with (b) one or more epoxy resins, Which binder also contains from 1 to 40% by weight, based on the total of (A) + (B), of a water-insoluble non-ionic resin (B), free from epoxide groups and containing urethane groups, which resin has been obtained by reacting a partially blocked diisocyanate or higher polyisocyanate with a reaction product of a polyepoxide and one or more low molecular weight compounds containing SH and/or OH groups. These surface-coating binders are especially used for the cathodic electrocoating of metal articles.
Inventors
- 👤 Fritz E. Kempter
- 👤 Heinrich Hartmann
- 👤 Erich Gulbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:01
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08G59/623; C08L; C08L63/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
159 words
A surface-coating binder for the cathodic electrocoating of electrically conductive surfaces, comprising a protonized heat-curable reaction product (A), substantially free from epoxide groups, of (a) one or more Mannich bases, prepared from (a 1 ) one or more polyhydric condensed phenols which may or may not contain ether groups, (a 2 ) one or more secondary amines which contain one or more hydroxyalkyl groups, with or without one or more secondary amines which do not contain such groups and (a 3 ) formaldehyde or a formaldehyde donor, with (b) one or more epoxy resins, which binder also contains from 1 to 40% by weight, based on the total of (A) + (B), of a water-insoluble non-ionic resin (B), free from epoxide groups and containing urethane groups, which has been obtained by reacting a partially blocked diisocyanate or higher polyisocyanate with a reaction product of a polyepoxide and one or more low molecular weight compounds containing SH and/or OH groups.
Claim 2
Dependent Claim
159 words
A surface-coating binder for the cathodic electrocoating of electrically conductive surfaces, comprising a protonized heat-curable reaction product (A), substantially free from epoxide groups, of (a) one or more Mannich bases, prepared from (a 1 ) one or more polyhydric condensed phenols which may or may not contain ether groups, (a 2 ) one or more secondary amines which contain one or more hydroxyalkyl groups, with or without one or more secondary amines which do not contain such groups and (a 3 ) formaldehyde or a formaldehyde donor, with (b) one or more epoxy resins, which binder also contains from 1 to 40% by weight, based on the total of (A) + (B), of a water-insoluble non-ionic resin (B), free from epoxide groups and containing urethane groups, which has been obtained by reacting a partially blocked diisocyanate or higher polyisocyanate with a reaction product of a polyepoxide and one or more low molecular weight compounds containing SH and/or OH groups.
Claim 3
Dependent Claim
93 words
A surface-coating binder as claimed in claim 1, wherein the non-ionic resin (B) which is free from epoxide groups and contains urethane groups is a reaction product of a partially blocked diisocyanate or higher polyisocyanate, which contains not more than one free isocyanate group per molecule, with a reaction product, which is substantially free from epoxide groups, of a polyepoxide with one or more compounds of the general formula HXR, where X is sulfur or oxygen and R is alkyl, oxaallkyl, hydroxyalkyl or hydroxyoxaalkyl of 2 to 10 carbon atoms, aryl or alkylphenyl.
Claim 4
Dependent Claim
29 words
A surface-coating binder as claimed in claim 2, wherein the polyepoxide used to prepare component (B) is a glycidyl ether based on bisphenol A, or of a polyhydric alcohol.
Claim 5
Dependent Claim
47 words
A surface-coating binder as claimed in claim 3, wherein the compound of the general formula HXR used to prepare component (B) is a mercaptan of the formula HSR, and R is alkyl of 1 to 12 carbon atoms, or is --CH 2 --CH 2 --OH or ##STR8##
Claim 6
Dependent Claim
46 words
A surface-coating binder as claimed in claim 1, wherein the partially blocked diisocyanate or polyisocyanate used to prepare the non-ionic resin (B) which is free from epoxide groups and contains urethane groups is an aromatic diisocyanate which is partially blocked with an aliphatic or cycloaliphatic alcohol.
Claim 7
Dependent Claim
23 words
A surface-coating binder as claimed in claim 5, wherein the aliphatic alcohol used as the blocking agent is a secondary or tertiary alcohol.
References Cited (Backward Citations)
US3462237A
Cited
US3790606A
Cited
US4014955A
Cited
DE2357075A1
Cited
GB1457932A
Cited
US3994989A
Cited
US4086292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |