US4139510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing cathodically depositable coating compositions
Assignee: Shell USA Inc
•
Filing: 1978-02-24
•
Granted: 1979-02-13
•
Expires: 1998-02-24
Abstract
Abstract Polyepoxide resins are adducted with polyamines using an excess of the amine. After the adducting reaction is completed, the excess unreacted polyamine is removed. The adduct is then reacted with a monoepoxide or a monocarboxylic acid. When salted with an acid, the resinous adducts are water soluble or water dispersible. The resin solutions or dispersions are particularly useful in cathodic electrodeposition processes for prime coating metal objects.
Inventors
- 👤 Terry L. Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:40
CPC Classifications
C; C25; C25D; C25D13/00; C25D13/04; C25D13/06; Y; Y10; Y10S; Y10S524/00; Y10S524/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
188 words
A process for preparing a resinous composition which comprises (A) adducting a) a polyepoxide resin derived from a dihydric phenol and an epihalohydrin, said polyepoxide resin having a 1,2-epoxide equivalent weight of about 400 to about 4000, with b) a polyamine having at least 2 amine nitrogen atoms per molecule, at least 3 amine hydrogen atom per molecule and no other groups reactive with epoxide groups; and wherein at least 1.5 mols of (b) are present for each epoxide equivalent of (a) and wherein the reaction is continued until all of the epoxide groups have reacted with amine groups; (B) removing by distillation the unreacted polyalkylene polyamine; and (C) reacting at a temperature of about 300° F. to aout 500° F. the so formed adduct with a monocarboxylic acid which contains one carboxylic acid group and no other groups reactive with amine groups, said monocarboxylic acid having about 8 to 24 carbon atoms per molecule wherein about 2 to about 6 mols of (C) are reacted per each mol of (A) and wherein said resinous composition has a weight per active nitrogen of about 200 to about 600.
Claim 2
Dependent Claim
188 words
A process for preparing a resinous composition which comprises (A) adducting a) a polyepoxide resin derived from a dihydric phenol and an epihalohydrin, said polyepoxide resin having a 1,2-epoxide equivalent weight of about 400 to about 4000, with b) a polyamine having at least 2 amine nitrogen atoms per molecule, at least 3 amine hydrogen atom per molecule and no other groups reactive with epoxide groups; and wherein at least 1.5 mols of (b) are present for each epoxide equivalent of (a) and wherein the reaction is continued until all of the epoxide groups have reacted with amine groups; (B) removing by distillation the unreacted polyalkylene polyamine; and (C) reacting at a temperature of about 300° F. to aout 500° F. the so formed adduct with a monocarboxylic acid which contains one carboxylic acid group and no other groups reactive with amine groups, said monocarboxylic acid having about 8 to 24 carbon atoms per molecule wherein about 2 to about 6 mols of (C) are reacted per each mol of (A) and wherein said resinous composition has a weight per active nitrogen of about 200 to about 600.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein 1.5 to 15 mols of polyamine are present for each epoxide equivalent of polyepoxide resin.
Claim 4
Dependent Claim
21 words
The process of claim 1 wherein 3 to 10 mols of polyamine are present for each epoxide equivalent of polyepoxide resin.
Claim 5
Dependent Claim
28 words
The process of claim 1 wherein the polyepoxide resin is derived from p,p'-dihydroxydiphenyl propane and epichlorohydrin and has a 1,2-epoxide equivalent weight of about 450 to about 2000.
Claim 6
Dependent Claim
37 words
The process of claim 1 wherein the polyamine is an alkylene polyamine having the formula ##STR5## wherein n is an integer of 0 to 4 and R is an alkylene group containing 2 to 4 carbon atoms.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein the alkylene polyamine is an ethylene polyamine.
Claim 8
Dependent Claim
12 words
The process of claim 6 wherein the ethylene polyamine is triethylene tetramine.
Claim 9
Dependent Claim
13 words
The process of claim 1 wherein the monocarboxylic acid is linseed fatty acid.
Claim 10
Dependent Claim
17 words
The process of claim 1 wherein the weight per active nitrogen is about 300 to about 400.
Claim 11
Dependent Claim
34 words
The process of claim 1 wherein the polyamine is an alkylene polyamine and wherein about 3 to about 10 mols of the alkylene polyamine are present for each epoxide equivalent of the polyepoxide resin.
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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |