US3948839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flatting agents
Assignee: Guardsman Products Inc
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Filing: 1974-02-14
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Granted: 1976-04-06
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Expires: 1994-02-14
Abstract
Abstract Flatting compositions for forming dull coatings which have improved resistance to change in gloss or flatness when subjected to elevated temperatures comprise fine size flatting agent particles of an in situ prepared cross-linked organic polymer. Flatted coating compositions are formed by cross-linking this modified organic polymer particle in dry form, or dispersed in an inert liquid medium, when added to a solubilized film-forming organic binder.
Inventors
- 👤 Edward R. DEVries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:41
CPC Classifications
C; C09; C09D; C09D131/00; C09D131/02; C09D131/04; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J3/12; C08J3/126; C08L; C08L77/00; C09D127/00; C09D127/02; C09D127/04; C09D127/06; C09D133/00; C09D133/04; C09D133/06; C09D133/10; C09D133/12; C09D7/00; C09D7/40; C09D7/42; C08J2367/00; C08J2367/02; C08J2433/00; C08J2433/04; C08J2433/06; C08J2433/10; C08J2433/12; C08J2475/00; C08J2475/04; C08L2205/00; C08L2205/14; C08L2205/18; C08L2555/00; C08L2555/40; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A flatting agent consisting of discrete particles having a fine size range from about 0.02 to about 10 microns of the in situ prepared cross-linked reaction product of a. a crystalline, thermoplastic polar nylon or polyester organic polymer containing reactive hydrogen groups and having a softening point of from about 120° to about 240°C. which is insoluble in common coating solvents for film-forming organic binders and soluble only at elevated temperatures in strong organic solvents for said organic polymer and b. a cross-linking agent chemically reactive with said organic polymer and containing chemically reactive isocyanate or methylol groups.
Claim 2
Dependent Claim
98 words
A flatting agent consisting of discrete particles having a fine size range from about 0.02 to about 10 microns of the in situ prepared cross-linked reaction product of a. a crystalline, thermoplastic polar nylon or polyester organic polymer containing reactive hydrogen groups and having a softening point of from about 120° to about 240°C. which is insoluble in common coating solvents for film-forming organic binders and soluble only at elevated temperatures in strong organic solvents for said organic polymer and b. a cross-linking agent chemically reactive with said organic polymer and containing chemically reactive isocyanate or methylol groups.
Claim 3
Dependent Claim
28 words
The flatting agent defined by claim 1 wherein the discrete particles are the cross-linked reaction product of (a) an ethylene glycol terephthalate-isophthalate polyester and (b) an isocyanate-terminated polyester.
Claim 4
Dependent Claim
27 words
The flatting agent defined by claim 1 wherein the discrete particles are the cross-linked reaction product of (a) an ethylene glycol terephthalate-isophthalate-sebacate polyester and (b) hexamethylol melamine.
Claim 5
Dependent Claim
24 words
The flatting agent defined by claim 1 wherein the discrete particles are the cross-linked reaction product of (a) nylon-6,10 and (b) hexamethylene diisocyanate trimer.
Claim 6
Dependent Claim
74 words
A flatting agent dispersion consisting of the discrete particles defined by claim 1 dispersed in an inert liquid dispersion medium comprising c. a common coating solvent for a compatible film-forming organic binder in which said organic polymer and said cross-linked reaction product are insoluble and d. a strong organic solvent for said organic polymer in which the organic polymer is soluble only at elevated temperatures and in which said cross-linked reaction product is insoluble.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |