US4569966A
Expired / Lapsed
US
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Polymeric microparticles
Assignee: PPG Industries Inc
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Filing: 1984-04-19
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Granted: 1986-02-11
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Expires: 2004-04-19
Abstract
Abstract Polymeric microparticles and dispersions of polymeric microparticles in a liquid hydrocarbon are disclosed. The dispersions are prepared by reacting in dispersed form a preformed NCO-prepolymer containing a segment solvated by the liquid hydrocarbon and a segment insoluble in the liquid hydrocarbon with an active hydrogen-containing compound. Reaction proceeds to form polymeric microparticles which are dispersed in the liquid hydrocarbon. Also disclosed are the use of the polymeric microparticles in coating compositions and articles coated with the coating compositions.
Inventors
- 👤 Robert M. Piccirilli
- 👤 David T. McKeough
- 👤 Wen-Hsuan Chang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:06
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0871; C08G18/28; C08G18/30; C08G18/36; C08G18/40; C08G18/42; C08G18/4288; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C08G18/64; C08G18/6407; C09; C09D; C09D167/00; C08G2150/00; C08G2150/20; C08G2220/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31; Y10T428/315; Y10T428/31504; Y10T428/31511; Y10T428/31551; Y10T428/31594; Y10T428/31678; Y10T428/31688; Y10T428/31786; Y10T428/31794
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
97 words
A dispersion of polymer microparticles in a liquid hydrocarbon, characterized in that the polymer is prepared by reacting in dispersed form a preformed NCO-prepolymer which is formed from reacting an organic polyisocyanate with a polyol mixture comprising a polymeric polyol which contains a segment which is not solvated by the hydrocarbon and a second polyol which contains a segment solvated by the hydrocarbon, said second polyol being formed from reacting poly-12-hydroxystearic acid with a polyepoxide, with an active hydrogen-containing compound having a functionality of at least 2 to form the polymer microparticles dispersed in the liquid hydrocarbon.
Claim 2
Dependent Claim
97 words
A dispersion of polymer microparticles in a liquid hydrocarbon, characterized in that the polymer is prepared by reacting in dispersed form a preformed NCO-prepolymer which is formed from reacting an organic polyisocyanate with a polyol mixture comprising a polymeric polyol which contains a segment which is not solvated by the hydrocarbon and a second polyol which contains a segment solvated by the hydrocarbon, said second polyol being formed from reacting poly-12-hydroxystearic acid with a polyepoxide, with an active hydrogen-containing compound having a functionality of at least 2 to form the polymer microparticles dispersed in the liquid hydrocarbon.
Claim 3
Dependent Claim
14 words
The dispersion of claim 1 in which the liquid hydrocarbon is an aliphatic hydrocarbon.
Claim 4
Dependent Claim
25 words
The dispersion of claim 1 in which the NCO-prepolymer is formed from reacting a polymeric polyol component with an equivalent excess of an organic polyisocyanate.
Claim 5
Dependent Claim
15 words
The dispersion of claim 3 in which the NCO:active hydrogen equivalent ratio is about 2:1.
Claim 6
Dependent Claim
25 words
The dispersion of claim 1 in which the polymeric polyol which contains a segment which is not solvated by the hydrocarbon is a polyester polyol.
Claim 7
Dependent Claim
24 words
The dispersion of claim 5 in which the polyester polyol has a number average molecular weight within the range of about 500 to 4000.
Claim 8
Dependent Claim
14 words
The dispersion of claim 6 in which the polyester polyol is a polycaprolactone polyol.
Claim 9
Dependent Claim
21 words
The dispersion of claim 3 in which the polyol mixture also contains a diol having a molecular weight less than 250.
Claim 10
Dependent Claim
19 words
The dispersion of claim 8 in which the polyol mixture also contains a diol and a higher functionality polyol.
Claim 11
Dependent Claim
103 words
A polymer in particulate form which is prepared by: (A) reacting a preformed NCO-prepolymer in dispersed form in a liquid hydrocarbon with an active hydrogen-containing compound having a functionality of at least 2 to form polymer microparticles dispersed in the liquid hydrocarbon; said NCO-prepolymer being formed from reacting an organic polyisocyanate with a polyol mixture comprising a polymeric polyol which contains a segment which is not solvated by the hydrocarbon and a second polyol which contains a segment solvated by the hydrocarbon; said second polyol being formed from reacting poly-12-hydroxystearic acid with a polyepoxide; (B) separating the polymer microparticles from the liquid hydrocarbon.
Claim 12
Dependent Claim
103 words
A polymer in particulate form which is prepared by: (A) reacting a preformed NCO-prepolymer in dispersed form in a liquid hydrocarbon with an active hydrogen-containing compound having a functionality of at least 2 to form polymer microparticles dispersed in the liquid hydrocarbon; said NCO-prepolymer being formed from reacting an organic polyisocyanate with a polyol mixture comprising a polymeric polyol which contains a segment which is not solvated by the hydrocarbon and a second polyol which contains a segment solvated by the hydrocarbon; said second polyol being formed from reacting poly-12-hydroxystearic acid with a polyepoxide; (B) separating the polymer microparticles from the liquid hydrocarbon.
Claim 13
Dependent Claim
25 words
The polymer of claim 10 in which the polymeric polyol which contains a segment which is not solvated by the hydrocarbon is a polyester polyol.
Claim 14
Dependent Claim
19 words
A coating composition comprising a film-forming polymer in combination with the polymeric microparticles prepared in accordance with claim 1.
Claim 15
Dependent Claim
19 words
A coating composition comprising a film-forming polymer in combination with the polymeric microparticles prepared in accordance with claim 3.
Claim 16
Dependent Claim
19 words
A coating composition comprising a film-forming polymer in combination with the polymeric microparticles prepared in accordance with claim 5.
Claim 17
Dependent Claim
24 words
The coating composition of claim 12 in which the film-forming polymer comprises a polymeric polyol selected from the class consisting of polyesters and polyurethanes.
Claim 18
Dependent Claim
18 words
A coated article comprising a substrate and adhered thereto a cured coating composition in accordance with claim 12.
Claim 19
Dependent Claim
29 words
A multi-layered coated article comprising a substrate and the cured coating composition of claim 12 adhered thereto as a basecoat and a cured transparent topcoat adhered to the basecoat.
Claim 20
Dependent Claim
13 words
A coated article of claim 17 in which the basecoat contains metallic pigmentation.
Claim 21
Dependent Claim
17 words
The dispersion of claim 1 in which the polymeric microparticles are in combination with acrylic polymeric microparticles.
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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) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |