US4374965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkaline resistant organic coatings for corrosion susceptible substrates II
Assignee: EIDP Inc
•
Filing: 1980-04-10
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Granted: 1983-02-22
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Expires: 2000-04-10
Abstract
Abstract Crosslinking compositions comprising (a) reaction product, optionally at least partially neutralized of certain di- or poly epoxy and hydroxy amines and (b) amino resin crosslinkers cure into alkaline resistant coatings that protect against corrosion even in absence of inhibiting pigments such as chromates. The crosslinking compositions may be formulated into a variety of primers including solvent and water base primers that cure within conventional schedules.
Inventors
- 👤 Ray A. Dickie
- 👤 Joseph W. Holubka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:01
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/12; C09D163/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
56 words
A solvent based primer composition that retards corrosion in substantial absence of chromate corrosion inhibiting pigments which comprises an intimate admixture of film forming ingredients consisting essentially of: (A) A substantially gel free epoxy and amine reaction product which contains no ester linkages and which is made by reacting in non-aqueous medium reactants consisting essentially of:
Claim 2
Dependent Claim
56 words
A solvent based primer composition that retards corrosion in substantial absence of chromate corrosion inhibiting pigments which comprises an intimate admixture of film forming ingredients consisting essentially of: (A) A substantially gel free epoxy and amine reaction product which contains no ester linkages and which is made by reacting in non-aqueous medium reactants consisting essentially of:
Claim 3
Dependent Claim
134 words
An epoxy resin reactant having two 1,2-epoxy groups per molecule which is the reaction product of bisphenol A and epichlorohydrin and has an epoxide equivalent weight range from at least about 875 to 4,000; and 2. An amine reactant selected from the group consisting of secondary monoamines having a total of up to about 20 carbons, and comprising at least about 75 mole percent hydroxy amine containing one or more hydroxy groups removed at least one carbon from the amino nitrogen in a stoichiometric amount such that the reaction product (A) comprises tertiary amino and primary and secondary hydroxy groups and is substantially free of unreacted epoxy groups; (B) a di- or polyhydroxy compound; and (C) An amine aldehyde resin crosslinking agent at about 5-30% by weight of the combined weight (A) and (B).
Claim 4
Dependent Claim
134 words
An epoxy resin reactant having two 1,2-epoxy groups per molecule which is the reaction product of bisphenol A and epichlorohydrin and has an epoxide equivalent weight range from at least about 875 to 4,000; and 2. An amine reactant selected from the group consisting of secondary monoamines having a total of up to about 20 carbons, and comprising at least about 75 mole percent hydroxy amine containing one or more hydroxy groups removed at least one carbon from the amino nitrogen in a stoichiometric amount such that the reaction product (A) comprises tertiary amino and primary and secondary hydroxy groups and is substantially free of unreacted epoxy groups; (B) a di- or polyhydroxy compound; and (C) An amine aldehyde resin crosslinking agent at about 5-30% by weight of the combined weight (A) and (B).
Claim 5
Dependent Claim
14 words
The composition in accordance with claim 1, wherein (B) is present and comprises glycol.
Claim 6
Dependent Claim
24 words
The composition in accordance with claim 1, wherein the secondary amine comprises a di-loweralkanol amine having a total of up to about 7 carbons.
Claim 7
Dependent Claim
15 words
The primer in accordance with claim 1, wherein the amine reactant is a dialkanol amine.
Claim 8
Dependent Claim
23 words
The composition in accordance with claim 1 or 4, wherein the amino resin crosslinking agent comprises alkylated melamine or urea resin or both.
References Cited (Backward Citations)
CA786410A
Cited
US3336253A
Cited
US3456053A
Cited
US3937679A
Cited
US3975346A
Cited
US3869366A
Cited
GB1423973A
Cited
US4064090A
Cited
US4021503A
Cited
US3962499A
Cited
US4076676A
Cited
US4076675A
Cited
US4119599A
Cited
US4137213A
Cited
US4116900A
Cited
US4170579A
Cited
US4192932A
Cited
US4192929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-21 | 1986-08-23 | 1987-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-21 | 1990-08-23 | 1991-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-21 | 1994-08-23 | 1995-02-22 | $7700.00 | Window Closed / Lapsed |