US4061503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silane treatment of titanium dioxide pigment
Assignee: OSI Specialties Inc
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Filing: 1976-09-29
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Granted: 1977-12-06
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Expires: 1996-09-29
Abstract
Abstract This invention is concerned with the treatment of particulate titanium dioxide with a polyether substituted silicon compound which serves to enhance its employment in pigmented and/or filled paints and plastics, and in reinforced plastic composite compositions.
Inventors
- 👤 Sidney Ethan Berger
- 👤 George Anthony Salensky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:42
CPC Classifications
B; B82; B82Y; B82Y30/00; C; C09; C09C; C09C3/00; C09C3/12; C09C1/00; C09C1/36; C09C1/3607; C09C1/3684; C01; C01P; C01P2004/00; C01P2004/60; C01P2004/62; C01P2004/64; C01P2004/80
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
67 words
A composition comprising titanium dioxide particles containing on their surfaces a silane, its hydrolyzates or resulting condensate, which silane possesses at least two to about three hydrolyzable groups bonded to the silicon thereof and an organic group which contains a polyalkylene oxide group, said silane being present on said surfaces in an amount sufficient to improve the dispersibility of said particles in a resin or plastic medium.
Claim 2
Dependent Claim
67 words
A composition comprising titanium dioxide particles containing on their surfaces a silane, its hydrolyzates or resulting condensate, which silane possesses at least two to about three hydrolyzable groups bonded to the silicon thereof and an organic group which contains a polyalkylene oxide group, said silane being present on said surfaces in an amount sufficient to improve the dispersibility of said particles in a resin or plastic medium.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein the amount of silane is from about 0.25 to about 5 weight percent of the composition.
Claim 4
Dependent Claim
23 words
The composition of claim 2 wherein the amount of the silane is from about 0.5 to about 0.3 weight percet of the composition.
Claim 5
Dependent Claim
88 words
The compositions of claim 1 wherein the silane has the following general formula: R.sup.II (OR.sup.I).sub.a ORSiX.sub.3 wherein R can be any divalent organic group which is either oxygen or carbon bonded to the silicon atom, R I is one or more 1,2-alkylene groups each containing at least 2 carbon atoms and not more than about 4 carbon atoms; R II is hydrogen, alkyl, acyloxy or an organofunctional group; X is a hydrolyzable group; and a is a number having an average value of from 4 to about 150.
Claim 6
Dependent Claim
72 words
The composition of claim 4 wherein the silane is coreacted or comixed with a different silane, as encompassed by the following formula: R.sub.n.sup.3 (SiX.sub.4-n).sub.b or the cohydrolyzate or the cocondensate of such different silane with the silane, wherein R 3 is an organic radical whose free valence is equal to the value of b, X is as defined above, n is equal to 0 or 1 and b is a positive number.
Claim 7
Dependent Claim
20 words
The composition of claim 4 wherein the silane has the following formula: H.sub.3 CO(CH.sub.2 CH.sub.2 O).sub.7.5 OCH.sub.2 CH.sub.2 CH.sub.2 Si(OCH.sub.3).sub.3.
Claim 8
Dependent Claim
20 words
The composition of claim 4 wherein the silane has the following formula: H.sub.3 CO(CH.sub.2 CH.sub.2 O).sub.113 --CH.sub.2 CH.sub.2 CH.sub.2 Si(OCH.sub.3).sub.3.
Claim 9
Dependent Claim
36 words
the process of treating titanium dioxide with the silane described in claim 5 which comprises flocculating the titanium dioxide in the presence of said silane during the manufacture of titanium dioxide after it has undergone hydroseparation.
Claim 10
Dependent Claim
16 words
The composition of claim 4 wherein a has an average value of from 4 to 120.
Claim 11
Dependent Claim
16 words
The composition of claim 5 wherein a has an average value of from 4 to 120.
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) | 1980-12-05 | 1981-06-06 | 1981-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-05 | 1985-06-06 | 1985-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-05 | 1989-06-06 | 1989-12-06 | $7700.00 | Window Closed / Lapsed |