US4557977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyvinylidene fluoride coatings
Assignee: Lilly Industries Inc
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Filing: 1984-08-29
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Granted: 1985-12-10
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Expires: 2004-08-29
Abstract
Abstract A solvent-born coating composition and process for wet-on-wet application to a metal substrate comprises a fluorocarbon resin, an acrylic resin, and various flow modifiers such as benzoguanamine resins, blocked isocyanates or polymeric urethanes. Such coatings used as a primer composition in conjunction with a fluorocarbon-containing topcoat impart improved corrosion resistance, substrate and intercoat adhesion and improved edge pullaway properties.
Inventors
- 👤 Timothy I. Memmer
- 👤 Peter T. Abel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:33
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; B05D7/16; C; C09; C09D; C09D127/00; C09D127/02; C09D127/12; C09D127/16; C09D133/00; C09D133/04; C09D133/06; C09D175/00; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L33/00; C08L33/04; C08L33/06; C08L61/00; C08L61/20; C08L61/26; C08L75/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
A solvent-borne composition for application to exterior building product substrate comprising on a resins solids basis: a. from 10% to 50% of a fluorocarbon resin b. from 20% to 89% of an acrylic resin c. from 1% to 30% of a flow modifier; said modifier selected from the group consisting of benzoguanamine resin, a blocked isocyanate or a polymeric urethane and wherein a+b+c total 100 percent.
Claim 2
Dependent Claim
66 words
A solvent-borne composition for application to exterior building product substrate comprising on a resins solids basis: a. from 10% to 50% of a fluorocarbon resin b. from 20% to 89% of an acrylic resin c. from 1% to 30% of a flow modifier; said modifier selected from the group consisting of benzoguanamine resin, a blocked isocyanate or a polymeric urethane and wherein a+b+c total 100 percent.
Claim 3
Dependent Claim
31 words
The composition of claim 1 wherein the fluorocarbon is a polyvinylidene fluoride; the acrylic resin is a thermoplastic acrylic polymer or copolymer and the flow modifier is a partially alkylated benzoguanamine.
Claim 4
Dependent Claim
31 words
The product of claim 1 wherein the acrylic resin is a thermoset acrylic or copolymer and the composition optionally contains an added crosslinking agent in addition to the said flow modifier.
Claim 5
Dependent Claim
145 words
A process for applying a non-chalking, wear resistant and corrosion resistant coating to a metal substrate which comprises the following steps: a. applying to a cleaned metal substrate an organic solvent-borne primer coat comprising on a resins solids basis: (1) from 10% to 5% of a fluorocarbon resin (2) from 20% to 89% of an acrylic resin (3) from 1% to 30% of a flow modifier; said modifier selected from the group consisting of benzoguanamine resin, a blocked isocyanate or a polymeric urethane and wherein a+b+c totals 100 percent b. flashing off a substantial portion of the organic solvent without stoving c. applying a fluorocarbon containing topcoat d. flashing and baking the composite coating at a temperature of from about 350° F. to about 480° F. sufficient to cause the primer coat and the topcoat to cure to an uniform protective film on said substrate.
Claim 6
Dependent Claim
145 words
A process for applying a non-chalking, wear resistant and corrosion resistant coating to a metal substrate which comprises the following steps: a. applying to a cleaned metal substrate an organic solvent-borne primer coat comprising on a resins solids basis: (1) from 10% to 5% of a fluorocarbon resin (2) from 20% to 89% of an acrylic resin (3) from 1% to 30% of a flow modifier; said modifier selected from the group consisting of benzoguanamine resin, a blocked isocyanate or a polymeric urethane and wherein a+b+c totals 100 percent b. flashing off a substantial portion of the organic solvent without stoving c. applying a fluorocarbon containing topcoat d. flashing and baking the composite coating at a temperature of from about 350° F. to about 480° F. sufficient to cause the primer coat and the topcoat to cure to an uniform protective film on said substrate.
Claim 7
Dependent Claim
28 words
The process of claim 4 wherein the primer contains a polyvinylidene fluoride in admixture with a thermoplastic acrylic polymer and said flow modifier is a partially alkylated benzoguanamine.
Claim 8
Dependent Claim
41 words
The process of claim 4 wherein the acrylic resin in the primer is a thermosetting acrylic polymer having reactive hydroxyl or carboxyl functionality and wherein said primer additionally contains a crosslinking agent reactive with said functionality to cure said composite coating.
Claim 9
Dependent Claim
10 words
A metal substrate coated with the composition of claim 1.
Claim 10
Dependent Claim
10 words
A metal substrate coated by the process of claim 4.
References Cited (Backward Citations)
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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) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |