US3624013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-hardenable water-dispersible resins derived from polyhydric polyethers and mixtures thereof with benzoguanamine-formaldehyde condensates particularly adapted for electrodeposition
Assignee: DeSoto Inc
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Filing: 1967-02-10
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Granted: 1971-11-30
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Expires: 1987-02-10
Abstract
Abstract Aqueous dispersions especially adapted to be electrodeposited at the anode to form corrosion resistant coatings after baking to cure the same are formulated based on water-dispersible condensation resins which are formed by esterifying a first part of the hydroxy functionality of a linear polyhydric polyether with a monocarboxylic acid such as a drying oil fatty acid. A second part of the hydroxy functionality is then consumed by reaction with a monoanhydride such as trimellitic anhydride providing a polycarboxylic intermediate which is reacted with a monoepoxide such as ethylene oxide, propylene oxide, butylene oxide or a glycidyl ester of a tertiary carboxylic acid to reduce the acid number to a value below 50 and to generate hydroxy functionality remote from the linear backbone of the polyether. The condensation resin is dispersed in water with the aid of a small amount of nitrogenous base, such as ammonia or an amine and the dispersed resin is heat-hardening per se. Cure is preferably effected using a water dispersible and nonwater-soluble heathardening benzoguanamine-formaldehyde resin which deposits in direct proportion to its concentration and which increases the resistivity of the film which is deposited to provide an opportunity for limiting film thickness at the voltage selected for electrodeposition.
Inventors
- 👤 Kazys Sekmakas
- 👤 Edward A Gauger Jr
- 👤 Lester A Henning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:30
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/44; C09D5/4419; C09D5/4423; C09D5/4426; C08; C08F; C08F8/00; C08F8/14; C08G; C08G65/00; C08G65/02; C08G65/26; C08G65/2603; C08G65/2615; C09D161/00; C09D161/20; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
29 words
A heat-hardening condensation resin as recited in claim 1 in which at least a portion of the acid groups in the final product are reacted with a nitrogenous base.
Claim 2
Dependent Claim
30 words
A heat-hardening condensation resin as recited in claim 1 in which at least a portion of the acid groups in said final product are reacted with an alkali metal base.
Claim 3
Dependent Claim
38 words
A heat-hardening condensation resin as recited in claim 1 in which said monocarboxylic acid is a fatty acid and is used in an amount to react with from 20-80 percent of the hydroxy functionality in said polyhydric polyether.
Claim 4
Dependent Claim
18 words
A heat-hardening condensation resin as recited in claim 1 in which said polycarboxylic acid monoanhydride is trimellitic anhydride.
Claim 5
Dependent Claim
35 words
A heat-hardening condensation resin as recited in claim 1 in which said monoepoxide is selected from the group consisting of ethylene oxide, propylene oxide, butylene oxide, glycidyl ester of tertiary monocarboxylic acids, and mixtures thereof.
Claim 6
Dependent Claim
48 words
A heat-hardening condensation resin as recited in claim 1 in which said monoepoxide is a glycidyl ester having the formula: in which R1 and R2 are alkyl radicals having a chain length of from two-18 carbon atoms and R3 is the same as R1 and R2 or hydrogen.
Claim 7
Dependent Claim
43 words
A heat-hardening condensation resin as recited in claim 1 in which said condensation resin is reacted with a base in an amount sufficient to provide dispersibility in water and said water dispersible product has an acid number prior to neutralization of from 8-25.
Claim 8
Dependent Claim
20 words
A heat-hardening condensation resin as recited in claim 1 in which said linear polyhydric polyether is an aliphatic polycyclic polyether.
Claim 9
Dependent Claim
17 words
A heat-hardening condensation resin as recited in claim 9 in which said polycyclic polyether has the formula:
Claim 10
Dependent Claim
21 words
A heat-hardening condensation resin as recited in claim 1 in which said resin has a hydroxyl number of at least 15.
Claim 11
Dependent Claim
17 words
A heat-hardening mixture comprising the alkaline water-dispersible condensation resin of claim 1 in admixture with aminoplast resin.
Claim 12
Dependent Claim
51 words
A heat-hardening alkaline water-dispersible condensation resin comprising an acidic adduct of a monoepoxide with carboxyl groups carried by a linear polyhydric polyether partial fatty ester, said carboxyl groups being bound to said linear polyether by ester groups and said acidic adduct having an acid number of from 8 to below 50.
Claim 13
Dependent Claim
31 words
A heat-hardening condensation resin as recited in claim 13 in which said acidic adduct is partially neutralized with a base and is directly dispersible in water in said partially neutralized condition.
Claim 14
Dependent Claim
41 words
A heat-hardening condensation resin as recited in claim 13 in which said partially neutralized acidic adduct has an acid number of from 8-25 and provides a pH when dispersed in water at a solids content of 10 percent below pH 7.7.
Claim 15
Dependent Claim
30 words
An aqueous dispersion of the heat-hardening condensation resin recited in claim 13, dispersion in water being effected with the aid of a base, said dispersion including dispersed water-insoluble aminoplast resin.
Claim 16
Dependent Claim
27 words
An aqueous dispersion as recited in claim 16 in which said aminoplast resin is a water-dispersible nonwater-soluble, heat-hardening condensate of benzoguanamine with a stoichiometric excess of formaldehyde.
Claim 17
Dependent Claim
24 words
A heat-hardening condensation resin as recited in claim 1 in which the acid value of said polycarboxylic intermediate is not in excess of 100.
Claim 18
Dependent Claim
39 words
A heat-hardening condensation resin as recited in claim 1 in which the hydroxy groups in the resin are consumed by reaction with the anhydride in an amount of one mole of hydroxy functionality for each mole of anhydride used.
Claim 19
Independent Claim
112 words
A method of producing a heat-hardening condensation resin dispersible in water with a minimum proportion of amine comprising reacting a first portion of the hydroxy functionality of a linear polyhydric polyether with monocarboxylic acid to produce an hydroxy functional partial ester, reacting a second part of the hydroxy functionality oF said partial ester with a polycarboxylic acid monoanhydride, said reaction consuming said anhydride functionality and providing a polycarboxylic intermediate, and then reacting a portion of the carboxyl groups of said polycarboxylic intermediate with a monoepoxide to provide a product having an acid number of from 8 to below 50 and to generate hydroxy functionality remote from the linear backbone of the polyether.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |