US4049596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion resistant aqueous and solvent-based primer compositions containing synergistic blends of zinc borate and barium metaborate pigments
Assignee: PPG Industries Inc
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Filing: 1975-11-03
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Granted: 1977-09-20
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Expires: 1995-11-03
Abstract
Abstract The addition of blends of zinc borate and barium metaborate pigments to resinous film forming vehicles comprising blends of: (1) an aqueous acrylic latex with an alkyd resin, a styrene allyl alcohol ester adduct or a polymerized dehydrated castor oil product or (2) a solvent-based epoxy ester resin with a chlorinated paraffin; produce primer compositions in which corrosion resistance is synergistically enhanced. The resultant primer compositions may be used on ferrous or non-ferrous metallic substrates such as motor vehicles, appliances, aluminum lawn furniture, etc.
Inventors
- 👤 Andrew Traister
- 👤 Glenn Troup
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:41
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/08; C09D5/082; C09D5/084; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31529; Y10T428/31678; Y10T428/31681; Y10T428/31692
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A corrosion resistant primer composition comprising: a. a film forming resin vehicle blend consisting essentially of: 1, from about 60 percent to about 80 percent by weight solids of an acrylic polymer latex and from about 20 percent to about 40 percent by weight solids of an alkyd resin, styrene-allyl alcohol ester adduct or a polymerized dehydrated castor oil; or 2. from about 85 percent to about 95 percent by weight solids of an epoxy ester resin and from about 5 to about 15 percent by weight solids of a chlorinated paraffin; and b. a pigment blend consisting of from 10 to 95 percent by weight of zinc borate and from 5 to 90 percent by weight of barium metaborate, wherein said zinc borate has the formula: 2 ZnO . 3 B.sub.2 O.sub.3 . (H.sub.2 O).sub.x wherein x is from 3.3 to 3.7 and wherein the ratio of said pigment blend to said resin vehicle solids is from about 40:100 to about 90:100.
Claim 2
Dependent Claim
163 words
A corrosion resistant primer composition comprising: a. a film forming resin vehicle blend consisting essentially of: 1, from about 60 percent to about 80 percent by weight solids of an acrylic polymer latex and from about 20 percent to about 40 percent by weight solids of an alkyd resin, styrene-allyl alcohol ester adduct or a polymerized dehydrated castor oil; or 2. from about 85 percent to about 95 percent by weight solids of an epoxy ester resin and from about 5 to about 15 percent by weight solids of a chlorinated paraffin; and b. a pigment blend consisting of from 10 to 95 percent by weight of zinc borate and from 5 to 90 percent by weight of barium metaborate, wherein said zinc borate has the formula: 2 ZnO . 3 B.sub.2 O.sub.3 . (H.sub.2 O).sub.x wherein x is from 3.3 to 3.7 and wherein the ratio of said pigment blend to said resin vehicle solids is from about 40:100 to about 90:100.
Claim 3
Dependent Claim
29 words
The composition of claim 1 wherein said acrylic latex is an acrylic polymer latex derived from a monomer mixture containing 33 percent methyl methacrylate and 67 percent ethyl acrylate.
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein said alkyd resin is a soya oil alkyd resin of soya oil, isophthalic acid and pentaerythritol.
Claim 5
Dependent Claim
23 words
The composition of claim 1 wherein said styrene-allyl alcohol ester adduct is an adduct of styrene, allyl alcohol and tall oil fatty acid.
Claim 6
Dependent Claim
26 words
The composition of claim 1 wherein said epoxy ester resin is an ester of an epoxy resin of epichlorohydrin-bisphenol A and a soya oil fatty acid.
Claim 7
Dependent Claim
23 words
The composition of claim 1 wherein said resin vehicle comprises from about 20 to about 30 percent by weight solids of the composition.
Claim 8
Dependent Claim
23 words
The composition of claim 1 wherein said zinc borate pigment has the formula: 2 ZnO . 3 B.sub.2 O.sub.3 . 3.5 H.sub.2 O.
Claim 9
Dependent Claim
20 words
The composition of claim 1 wherein the ratio of zinc borate to barium metaborate in said pigment blend is 63:37.
Claim 10
Dependent Claim
29 words
An inhibitive pigment blend consisting of from about 10 to about 95 percent by weight zinc borate and from about 5 to about 90 percent by weight barium metaborate.
Claim 11
Dependent Claim
29 words
An inhibitive pigment blend consisting of from about 10 to about 95 percent by weight zinc borate and from about 5 to about 90 percent by weight barium metaborate.
Claim 12
Dependent Claim
23 words
The inhibitive pigment blend of claim 9 containing 63 percent by weight of zinc borate and 37 percent by weight of barium metaborate.
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) | 1980-09-19 | 1981-03-21 | 1981-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-19 | 1985-03-21 | 1985-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-19 | 1989-03-21 | 1989-09-20 | $7700.00 | Window Closed / Lapsed |