US4315840A
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Preparation of cathodic electrocoating binders
Assignee: BASF SE
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Filing: 1979-10-18
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Granted: 1982-02-16
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Expires: 1999-10-18
Abstract
Abstract A process for the preparation of self-crosslinking, cathodic electrocoating binders by reacting polyether-polyols, which may or may not contain thio groups, with semi-blocked diisocyanates or partially blocked polyisocyanates, wherein the reaction products (A), containing blocked isocyanate groups, are reacted with a polyamine (B), some of whose amino groups may or may not be in the form of ketimine groups, in such a way that one or more amino groups of the polyamine (B) form a urea group with a blocked isocyanate group of the reaction product (A), and the self-cross-linking reaction product of (A) and (B) is converted into a water-dilutable form in the conventional manner by protonization with an acid. The coating binders prepared according to the invention may be used for cathodic electrocoating of metal articles.
Inventors
- 👤 Fritz E. Kempter
- 👤 Eberhard Schupp
- 👤 Erich Gulbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:08
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/4465; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
100 words
A process for the preparation of self-crosslinking, cathodic electrocoating binders by reacting polyetherpolyols, which may or may not contain thio groups, with semi-blocked diisocyanates or partially blocked polyisocyanates, wherein the reaction products (A) so obtained and containing blocked isocyanate groups, are further reacted with a polyamine (B) in such a way that one or more amino groups of the polyamine (B) form a urea group with a blocked isocyanate group of the reaction product (A) and the self-crosslinking reaction product of (A) and (B) is thereafter converted into a water-dilutable form in the conventional manner by protonization with an acid.
Claim 2
Dependent Claim
100 words
A process for the preparation of self-crosslinking, cathodic electrocoating binders by reacting polyetherpolyols, which may or may not contain thio groups, with semi-blocked diisocyanates or partially blocked polyisocyanates, wherein the reaction products (A) so obtained and containing blocked isocyanate groups, are further reacted with a polyamine (B) in such a way that one or more amino groups of the polyamine (B) form a urea group with a blocked isocyanate group of the reaction product (A) and the self-crosslinking reaction product of (A) and (B) is thereafter converted into a water-dilutable form in the conventional manner by protonization with an acid.
Claim 3
Dependent Claim
31 words
A process as claimed in claim 1, wherein the reaction product (A), containing blocked isocyanate groups, is reacted with the polyamine (B) in the weight ratio of from 9:1 to 2.5:7.5.
Claim 4
Dependent Claim
35 words
A process as claimed in claim 1, wherein the primary and/or secondary amino groups and/or ketimine groups contained in the self-crosslinking reaction product of (A) and (B) give amine numbers of from 20 to 200.
Claim 5
Dependent Claim
77 words
A process as claimed in claim 1, wherein the polyether-polyol used to prepare the reaction product (A) is an epoxide-free reaction product obtained from glycidyl ethers of diphenols or polyphenols and a compound of the formula HXR, where X is O, S, [--O--CH 2 --CH 2 --] n or ##STR9## n is an integer from 1 to 3 and R is alkyl of 1 to 12 carbon atoms or is --CH 2 --CH 2 --OH or ##STR10##
Claim 6
Dependent Claim
34 words
A process as claimed in claim 1, wherein the polyether-polyol used to prepare the reaction product (A) is a reaction product obtained from a diphenol or polyphenol, containing ether groups, with a monoepoxide compound.
Claim 7
Dependent Claim
52 words
A process as claimed in claim 1, wherein the polyether-polyol used to prepare the reaction product (A) is an epoxide-free reaction product obtained from one or more glycidyl ethers of a diphenol or polyphenol and the monohydric phenol fraction of cashew nut shell liquid, said phenol having a 15-carbon unsaturated, meta-substituted group.
Claim 8
Dependent Claim
104 words
A process as claimed in claim 1, wherein an epoxide-free reaction product obtained from glycidyl ethers of polyhydric aliphatic alcohols, polyether-alcohols or epoxidized polybutadiene oils and a compound of the formula HXR, where X is O, S, [--O--CH 2 --CH 2 --] n or ##STR11## n is an integer from 1 to 3 and R is alkyl of 1 to 12 carbon atoms or is --CH 2 --CH 2 --OH or ##STR12## is used to prepare the reaction product (A), and a reaction product, obtained from a diglycidyl ether, based on a polyhydric phenol, and a polyfunctional amine is used as the polyamine (B).
Claim 9
Dependent Claim
36 words
A process as claimed in claim 1, wherein the polyether-polyol used to prepare the reaction product (A) is a reaction product obtained from a trihydric, tetrahydric, pentahydric or hexahydric alcohol and ethylene oxide or propylene oxide.
Claim 10
Dependent Claim
27 words
A process as claimed in claim 1, wherein a toluylene diisocyanate semi-blocked with a primary, secondary or tertiary alcohol is used to prepare the reaction product (A).
Claim 11
Dependent Claim
35 words
A process as claimed in claim 1, wherein a diisocyanate or polyisocyanate partially blocked with an alkylene glycol monoalkyl ether containing from 1 to 3 alkylene groups is used to prepare the reaction product (A).
Claim 12
Dependent Claim
36 words
A process as claimed in claim 1, wherein a partially blocked diisocyanate or polyisocyanate, whose blocking agent in part consists of a phenol, phthalimide, imidazole or a ketoxime, is used to prepare the reaction product (A).
Claim 13
Dependent Claim
82 words
A process as claimed in claim 1, wherein the reaction product (A) is a polyether-polyol which is partially esterified with unsaturated fatty acids and which contains blocked isocyanate groups and may or may not contain thio groups, and that during the reaction with the polyamine (B) the fatty acid radical of the said product (A) is at least partially transferred, with aminolysis and amide formation, onto the polyamine (B) or onto the polyamine portion of the reaction product of (A) and (B).
Claim 14
Dependent Claim
67 words
A process as claimed in claim 1, wherein the polyamine (B) is a reaction product of a polyfunctional amine with the glycidyl ether of the monohydric phenol fraction of cashew nut shell liquid, said phenol having a 15-carbon unsaturated, meta-substituted group, or the diglycidyl ether of a phenol adduct of the monohydric phenol fraction of cashew nut shell liquid, said phenol having a 15-carbon unsaturated, meta-substituted group.
Claim 15
Dependent Claim
21 words
A process as claimed in claim 1, wherein the polyamine (B) contains from 4 to 15 primary or secondary amino groups.
Claim 16
Dependent Claim
26 words
A process as claimed in claim 1, wherein the polyamine (B) contains olefinically unsaturated groups and has a molecular weight of from about 100 to 5,000.
Claim 17
Dependent Claim
13 words
A cathodic electrocoating binder prepared by the process as claimed in claim 1.
Claim 18
Dependent Claim
13 words
A cathodic electrocoating binder prepared by the process as claimed in claim 2.
Claim 19
Dependent Claim
13 words
A cathodic electrocoating binder prepared by the process as claimed in claim 3.
Claim 20
Dependent Claim
13 words
A cathodic electrocoating binder prepared by the process as claimed in claim 4.
Claim 21
Dependent Claim
23 words
A process as claimed in claim 1, wherein the primary amino groups of the polyamine (B) are in the form of ketimine groups.
Claim 22
Dependent Claim
48 words
A process as claimed in claim 1, wherein the blocking agents of product (A) are reacted with an epoxide compound after the reaction of the product (A) with the polyamine (B), and wherein the primary amino groups of the polyamine (B) are in the form of ketimine groups.
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) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |