US3713872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of spraying thermoplastic paint compositions
Assignee: PPG Industries Inc
•
Filing: 1971-02-01
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Granted: 1973-01-30
•
Expires: 1991-02-01
Abstract
Abstract A coating composition comprising a thermoplastic acrylic polymer in a solution wherein the polymeric solution, devoid of pigment, has a surface tension of less than 25.2 dynes per centimeter at room temperature is particularly useful as an automotive top coating. The coating compositions, when sprayed onto substrates, exhibit increased efficiency of paint deposited per unit of paint sprayed.
Inventors
- 👤 J Seiner
- 👤 S Porter
- 👤 D Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:52
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/04; C09D133/06; C08; C08L; C08L1/00; C08L1/08; C08L1/10; C08L1/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
67 words
The method of spraying a paint composition to obtain an increased efficiency of paint depositing on the substrate after spraying comprising spraying onto a substrate a paint composition comprising a thermoplastic acrylic polymer in a solvent solution comprising a volatile solvent compatible with the acrylic polymer wherein the polymeric solution devoid of pigment has a surface tension of less than 25.2 dynes per centimeter at room temperature.
Claim 2
Independent Claim
67 words
The method of spraying a paint composition to obtain an increased efficiency of paint depositing on the substrate after spraying comprising spraying onto a substrate a paint composition comprising a thermoplastic acrylic polymer in a solvent solution comprising a volatile solvent compatible with the acrylic polymer wherein the polymeric solution devoid of pigment has a surface tension of less than 25.2 dynes per centimeter at room temperature.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein the substrate is primed metal.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein the solvent solution comprises a blend of volatile solvents compatable with the acrylic polymer and a diluent which is a non-solvent for the acrylic polymer.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein the diluent is a liquid aliphatic hydrocarbon.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the paint composition additionally contains pigments.
Claim 7
Dependent Claim
25 words
The method of claim 1 wherein the paint coMposition additionally contains from about 2 to about 30 percent by weight of a soluble cellulosic material.
Claim 8
Dependent Claim
13 words
The method of claim 6 wherein the cellulosic material is cellulose acetate butyrate.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein the paint composition additionally contains an external plasticizer.
Claim 10
Dependent Claim
41 words
The method of claim 1 wherein the thermoplastic acrylic polymer is a blend of a polymer of alkyl acrylate or methacrylate with an epoxy resin wherein the blend comprises at least 40 percent by weight of the alkyl acrylate or methacrylate.
Claim 11
Dependent Claim
17 words
The method of claim 1 wherein a volatile solvent compatible with the acrylic polymer is diethyl ether.
Claim 12
Dependent Claim
16 words
The method of claim 1 wherein a volatile solvent compatable with the acrylic polymer is toluene.
References Cited (Backward Citations)
US2934509A
Cited
US2849409A
Cited
US3194777A
Cited
US2949383A
Cited
US3055851A
Cited
US3318714A
Cited
US3429840A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |