US4800103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic fillers coated with latex
Assignee: Imerys Minerals Ltd
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Filing: 1986-08-29
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Granted: 1989-01-24
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Expires: 2006-08-29
Abstract
Abstract A process for preparing an inorganic filler comprising treating a particulate inorganic material with a natural or synthetic latex composition and dewatering and drying the resultant mixture. The surface-treated inorganic filler can be used with advantage in a polymeric resin composition.
Inventors
- 👤 David G. Jeffs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:55
CPC Classifications
C; C09; C09C; C09C3/00; C09C3/10; C08; C08K; C08K9/00; C08K9/04; C08K3/00; C08K3/34; C08K9/08; C01; C01P; C01P2004/00; C01P2004/30; C01P2004/32; C01P2004/51; C01P2004/60; C01P2004/61; C01P2004/80; C01P2006/00; C01P2006/20; C01P2006/60; C01P2006/90; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
124 words
A process for preparing a coated inorganic filler which comprises adding to a particulate inorganic material selected from the group consisting of a kaolinitic clay, a calcined kaolinitic clay, a calcium carbonate, wollastonite, bauxite, talc, and mica, a natural or synthetic latex composition which comprises a suspension of polymer particles in water wherein the latex solids are selected from the group consisting of a natural rubber, a natural rubber which has been substituted with functional groups, a styrene butadiene rubber (SBR) and a poly(vinyl acetate), and dewatering and drying the resultant mixture, the amount of the natural or synthetic latex composition added being such as to provide from 1% to 10% by weight of latex solids based on the weight of dry inorganic material.
Claim 2
Dependent Claim
124 words
A process for preparing a coated inorganic filler which comprises adding to a particulate inorganic material selected from the group consisting of a kaolinitic clay, a calcined kaolinitic clay, a calcium carbonate, wollastonite, bauxite, talc, and mica, a natural or synthetic latex composition which comprises a suspension of polymer particles in water wherein the latex solids are selected from the group consisting of a natural rubber, a natural rubber which has been substituted with functional groups, a styrene butadiene rubber (SBR) and a poly(vinyl acetate), and dewatering and drying the resultant mixture, the amount of the natural or synthetic latex composition added being such as to provide from 1% to 10% by weight of latex solids based on the weight of dry inorganic material.
Claim 3
Dependent Claim
21 words
A process according to claim 1, wherein substantially all the particles in the inorganic material are not larger than 0.100 mm.
Claim 4
Dependent Claim
90 words
A process according to claim 1, wherein an aqueous suspension containing from 5% to 50% by weight of the inorganic material is mixed with a natural or synthetic latex composition containing from about 40% to about 60% by weight of solids, a water-soluble salt having a multi-valent cation is added to the resulting mixture, the pH of the resulting mixture is adjusted to a value greater than 4.0 to form flocs, the mixture containing the flocculated material is dewatered, and the dewatered solids are dried to a substantially bone-dry state.
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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) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |