US3943080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic flatting agents and method of preparation
Assignee: PPG Industries Inc
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Filing: 1974-08-01
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Granted: 1976-03-09
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Expires: 1994-08-01
Abstract
Abstract Solid organic inert flatting agents are prepared by reacting urea or phenol and formaldehyde in a basic aqueous medium to provide a prepolymer solution, then blending the prepolymer in the presence of a protective colloid-forming material, subsequently acidifying the basic prepolymer solution so that particles are formed and precipitated in the presence of a colloid-forming material, as spheroidal beads, and finally collecting and, if desired, drying the urea or phenol formaldehyde particulate beads. These beads have a high flatting efficiency and may be incorporated in resinous vehicles to provide compositions that produce low glass coatings of desirable properties.
Inventors
- 👤 Marco Wismer
- 👤 Karl F. Schimmel
- 👤 Rodger G. Temple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:11
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/26; C08G12/04; C08G12/10; C08G12/12; C08G8/00; C08G8/04; C08G8/08; C09; C09D; C09D7/00; C09D7/40; C09D7/42
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
166 words
A coating composition comprising a film forming resinous vehicle and incorporated therein agglomerated particulate beads having a gross particle size of from about 1 to about 50 microns in an amount sufficient to have a flatting effect on films of said filmforming material, wherein said beads consist essentially of urea or phenol and formaldehyde prepared by the method comprising: A. reacting a urea or a phenol and a formaldehyde, wherein the molar ratio of the urea to the formaldehyde is from about 1:1 to about 3:0.5 and wherein the molar ratio of the phenol to the formaldehyde is from about 1:1 to about 1:3, in a basic aqueous medium to form a prepolymer; B. blending said prepolymer with a hydroxyfunctional protective colloid-forming material; C. polymerizing the prepolymer by acidifying the mixture thus formed under agitation, thereby forming particulate beads and agglomerating said beads to a gross particle size of from about 1 micron to about 50 microns; and D. collecting said urea or phenol-formaldehyde particulate beads.
Claim 2
Dependent Claim
166 words
A coating composition comprising a film forming resinous vehicle and incorporated therein agglomerated particulate beads having a gross particle size of from about 1 to about 50 microns in an amount sufficient to have a flatting effect on films of said filmforming material, wherein said beads consist essentially of urea or phenol and formaldehyde prepared by the method comprising: A. reacting a urea or a phenol and a formaldehyde, wherein the molar ratio of the urea to the formaldehyde is from about 1:1 to about 3:0.5 and wherein the molar ratio of the phenol to the formaldehyde is from about 1:1 to about 1:3, in a basic aqueous medium to form a prepolymer; B. blending said prepolymer with a hydroxyfunctional protective colloid-forming material; C. polymerizing the prepolymer by acidifying the mixture thus formed under agitation, thereby forming particulate beads and agglomerating said beads to a gross particle size of from about 1 micron to about 50 microns; and D. collecting said urea or phenol-formaldehyde particulate beads.
Claim 3
Dependent Claim
11 words
A coating composition as in claim 1 having incorporated therein pigments.
Claim 4
Dependent Claim
31 words
A coating composition as in claim 1 wherein said film-forming material is selected from the group consisting of acrylic resins, cellulose derivatives, polyolefin resins, polyamide resins, alkyd resins, and phenolic resins.
Claim 5
Dependent Claim
18 words
A coating composition as in claim 1 wherein said film-forming material is linseed alkyd resin modified with diisocyanate.
References Cited (Backward Citations)
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US3615792A
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US3627713A
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US3634347A
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US3761433A
Cited
US3703487A
Cited
US3830782A
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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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |