Patent EP0074634A2 successfully refreshed from Google Patents.
EP0074634A2
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EP
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Process for the preparation of cationic resins, aqueous dispersions thereof, and electrodeposition using the aqueous dispersions
Assignee: PPG Industries Ohio Inc
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Filing: 1982-09-10
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Granted: —
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Expires: 2002-09-10
Abstract
Abstract An improved process for the preparation of cationic resins derived from polyepoxides is disclosed. Typically, the process comprises contacting the polyepoxide with particular polyether polyols and heating the two together to form a resin which may then be reacted with a cationic base group former such as an amine and acid. Aqueous dispersions of the cationic resins prepared by the improved process are useful for coating applications, particularly cationic electrodeposition. They exhibit good low temperature cure response and the cured coatings have good physical properties such as resistance to water, detergent and salt spray corrosion.
Inventors
- 👤 Marco Wismer
- 👤 Joseph Frank Bosso
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 04:34
CPC Classifications
C; C08; C08L; C08L63/00; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0809; C08G18/0814; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5069; C08G18/64; C08G18/6415; C08G18/643; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/8064; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2606; C09; C09D; C09D163/00; C09D5/00; C09D5/44; C09D5/4419; C09D5/443; C09D5/4434; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
92 words
In a process for preparing a resin which contains cationic base groups comprising reacting a polyepoxide resin with a cationic base group former, the improvement comprising: contacting a polyepoxide with a polyether polyol and heating the two together to form the polyepoxide resin, said polyether polyol formed from reacting: (A) a cyclic polyol with (B) ethylene oxide or a mixture of ethylene oxide and an alkylene oxide having 3 to 8 carbon atoms in the alkylene chain; the equivalent ratio of (B) to (A) being within the range of 3 to 20:1.
Claim 2
Dependent Claim
92 words
In a process for preparing a resin which contains cationic base groups comprising reacting a polyepoxide resin with a cationic base group former, the improvement comprising: contacting a polyepoxide with a polyether polyol and heating the two together to form the polyepoxide resin, said polyether polyol formed from reacting: (A) a cyclic polyol with (B) ethylene oxide or a mixture of ethylene oxide and an alkylene oxide having 3 to 8 carbon atoms in the alkylene chain; the equivalent ratio of (B) to (A) being within the range of 3 to 20:1.
Claim 3
Dependent Claim
55 words
The process of Claim 1 in which the polyether polyol has the following structural formula: where R is a cyclic radical, n equals 1 to 15, m equals 0 to 18, n plus m equals 1 to 20, X is an alkylene chain of 3 to 8 carbon atoms, and Z equals 2 to 3.
Claim 4
Dependent Claim
28 words
The process of Claim 1 in which the polyepoxide is a polyglycidyl ether of a cyclic diol having a molecular weight in the range of 340 to 2000.
Claim 5
Dependent Claim
13 words
The process of Claim 3 in which the cyclic diol is bisphenol A.
Claim 6
Dependent Claim
37 words
The process of Claim 1 in which the cationic salt group former is selected from the class consisting of primary, secondary or tertiary amine salt groups, quaternary ammonium base groups, ternary sulfonium salt groups, and mixtures thereof.
Claim 7
Dependent Claim
53 words
The process of Claim 1 in which the cyclic polyol is of the structure: where R 1 is a cycloaliphatic or an aromatic radical and R 2 and R 3 are the same or different and are selected from the class consisting of hydrogen and alkyl containing from 1 to 8 carbon atoms.
Claim 8
Dependent Claim
14 words
The process of Claim 6 in which R i is phenyl or hydrogenated phenyl.
Claim 9
Dependent Claim
14 words
The process of Claim 7 in which R 2 and R 3 are methyl.
Claim 10
Dependent Claim
17 words
An aqueous dispersion containing the cationic resin prepared as described in any of Claims 1 to 8.
Claim 11
Dependent Claim
47 words
The aqueous dispersion of Claim 9 in which the cationic resin contains active hydrogens and is present with a curing agent which is stable in the presence of the active hydrogens but which is reactive with the active hydrogens at elevated temperature to form a cured product.
Claim 12
Dependent Claim
16 words
The aqueous dispersion of Claim 10 in which the curing agent is a capped organic polyisocyanate.
Claim 13
Dependent Claim
14 words
The aqueous dispersion of Claim 11 in which the organic polyisocyanate is fully capped.
Claim 14
Dependent Claim
14 words
The aqueous dispersion of Claim 10 in which the curing agent is an aminoplast.
Claim 15
Dependent Claim
33 words
An aqueous resinous dispersion containing 1 to 50 percent by weight of the cationic resin prepared as described in any of Claims 1 to 8 based on total weight of the aqueous dispersion.
Claim 16
Independent Claim
65 words
A method for coating a conductive substrate serving as a cathode in an electrical circuit comprising the cathode and an anode both of which are immersed in an aqueous dispersion of the cationic resin prepared as described in any of Claims 1 to 8; said method comprising passing electric current between the anode and the cathode to cause a coating to deposit on the cathode.
Claim 17
Dependent Claim
46 words
The method of Claim 15 in which the cationic resin contains active hydrogens and is present with a curing agent which is stable in the presence of the active hydrogens but which is reactive with the active hydrogens at elevated temperature to form a cured product.
Claim 18
Dependent Claim
15 words
The method of Claim 16 in which the curing agent is a capped organic polyisocyanate.
Claim 19
Dependent Claim
13 words
The method of Claim 17 in which the organic polyisocyanate is fully capped.
Claim 20
Dependent Claim
13 words
The method of Claim 16 in which the curing agent is an aminoplast.
Claim 21
Dependent Claim
21 words
The method of Claim 15 in which the aqueous dispersion contains 1 to 50 percent by weight of the cationic resin.
References Cited (Backward Citations)
No citation records indexed.
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