Patent JPS6413256A successfully refreshed from Google Patents.
US4898892A
Expired / Lapsed
US
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Methods for preparing opaque coatings and applying the same
Assignee: Sovereign Holdings LLC
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Filing: 1989-06-06
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Granted: 1990-02-06
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Expires: 2009-06-06
Abstract
Abstract Enhanced hiding power for opacifiers in paints, inks, and other coatings is provided by employing the opacifiers, such as TiO2, ZnO, talc, CaCO3, and the like, adhered to or embedded in the surface of thermoplastic microspheres. The composite opacifier-microsphere material is readily formed with a preselected specific gravity, so that there is little tendency for the material to separate. In addition, the composite behaves in the coating as a opacifier-air interface, having a very high different in refractive indices, and exceptional hiding power. The high volume to weight ratio of the composite affords very attractive economic advantages, effectively reducing the weight proportion of opacifiers required in the formulations, and other related advantages.
Inventors
- 👤 George E. Melber
- 👤 Leon Wolinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:55
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/02; B01J13/20; B01J13/206; B82; B82Y; B82Y30/00; C; C08; C08J; C08J3/00; C08J3/12; C08J3/124; C08J9/00; C08J9/32; C09; C09C; C09C1/00; C09C1/0081; C09C1/0084; C09D; C09D7/00; C09D7/40; C09D7/60; C09D7/61; C09D7/62; C09D7/65; C09D7/66; C09D7/68; C09D7/69; C09D7/70; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/34; C01P2004/60; C01P2004/61; C01P2004/62; C01P2004/64; C01P2004/80; C01P2006/00; C01P2006/10; C01P2006/20; C01P2006/32; C01P2006/33; C01P2006/34; C01P2006/60; C01P2006/80; C01P2006/82; C08K; C08K3/00; C08K3/01; C08K3/013; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
The method of making an opaque coating comprising combining a film forming coating binder and a composite opacifier, said composite opacifier comprising dry expanded thermoplastic resin microspheres having an inorganic opacifying constituent adhered to and embedded the surface thereof, said opacifying constituent having a refractive index of greater than about 1.6, and said composite opacifier having a hiding power substantially equivalent to that of said opacifying constituent having a refractive interface with air.
Claim 2
Independent Claim
73 words
The method of making an opaque coating comprising combining a film forming coating binder and a composite opacifier, said composite opacifier comprising dry expanded thermoplastic resin microspheres having an inorganic opacifying constituent adhered to and embedded the surface thereof, said opacifying constituent having a refractive index of greater than about 1.6, and said composite opacifier having a hiding power substantially equivalent to that of said opacifying constituent having a refractive interface with air.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein a major portion of said opacifying constituent has a particle size of from about 200 to about 2000 millimicrons.
Claim 4
Dependent Claim
20 words
The method of claim 1 wherein said opacifying constituent comprises from 20 to 97 weight percent of said composite opacifier.
Claim 5
Dependent Claim
19 words
The method of claim 3 wherein said opacifying constituent comprises less than 80 weight percent of said composite opacifier.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein a major portion of said opacifying constituent has a particle size of from about 400 to about 800 millimicrons.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein said composite opacifier has a specific gravity of from about 0.1 to about 2.8 gm/cc.
Claim 8
Dependent Claim
21 words
The method of claim 1 wherein said composite opacifier has a specific gravity of from about 0.15 to about 1.5 gm/cc.
Claim 9
Independent Claim
56 words
A method of applying an opaque coating to a substrate comprising: (a) forming a coating medium containing a film forming coating binder and a composite opacifier, said composite opacifier comprising expanded thermoplastic resin microspheres having an inorganic opacifying constituent adhered to and embedded in the surface thereof, and (b) applying said coating medium to said substrate.
Claim 10
Independent Claim
56 words
A method of applying an opaque coating to a substrate comprising: (a) forming a coating medium containing a film forming coating binder and a composite opacifier, said composite opacifier comprising expanded thermoplastic resin microspheres having an inorganic opacifying constituent adhered to and embedded in the surface thereof, and (b) applying said coating medium to said substrate.
Claim 11
Dependent Claim
25 words
The method of claim 8 wherein a major portion of said opacifying constituent has a particle size of from about 200 to about 2000 millimicrons.
Claim 12
Dependent Claim
25 words
The method of claim 8 wherein a major portion of said opacifying constituent has a particle size of from about 400 to about 800 millimicrons.
Claim 13
Dependent Claim
20 words
The method of claim 8 wherein said opacifying constituent comprises from 20 to 97 weight percent of said composite opacifier.
Claim 14
Dependent Claim
21 words
The method of claim 8 wherein said composite opacifier has a specific gravity of from about 0.1 to about 2.8 gm/cc.
Claim 15
Dependent Claim
21 words
The method of claim 8 wherein said composite opacifier has a specific gravity of from about 0.15 to about 1.5 gm/cc.
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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |