US5049594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer compositions containing inorganic fillers coated with latex and process for preparing coated fillers
Assignee: Imerys Minerals Ltd
•
Filing: 1990-01-17
•
Granted: 1991-09-17
•
Expires: 2010-01-17
Abstract
Abstract There is disclosed a process for preparing an organic polymer composition which includes an inorganic filler, which comprises: (i) treating an inorganic filler by adding to a particulate white inorganic material 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 acrylic copolymers and vinyl acetate copolymers, 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; and (ii) combining the treated inorganic filler with an organic polymer. Also disclosed is an organic polymeric composition comprising an organic polymer and an inorganic filler.
Inventors
- 👤 David G. Jeffs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:45
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: 14
Claim 1
Independent Claim
110 words
A process for preparing an organic polymer composition which includes an inorganic filler, which comprises: (i) treating an inorganic filler by adding to a particulate white inorganic material 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 acrylic copolymers and vinyl acetate copolymers, 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; and (ii) combining the treated inorganic filler with an organic polymer.
Claim 2
Dependent Claim
110 words
A process for preparing an organic polymer composition which includes an inorganic filler, which comprises: (i) treating an inorganic filler by adding to a particulate white inorganic material 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 acrylic copolymers and vinyl acetate copolymers, 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; and (ii) combining the treated inorganic filler with an organic polymer.
Claim 3
Dependent Claim
53 words
A process according to claim 1, wherein the particulate white inorganic material is selected from the group consisting of kaolinitic clay, a calcined kaolinitic clay, a calcium carbonate, silicates of calcium and aluminium, bauxite, talc, mica, alumina trihydrate, silica, carbonates and hydroxides of magnesium, dolomite, calcium sulphate and titanium dioxide, and mixtures thereof.
Claim 4
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 5
Dependent Claim
12 words
A process according to claim 1, wherein the acrylic copolymer is elastomeric.
Claim 6
Dependent Claim
12 words
A process according to claim 1, wherein the acrylic copolymer is non-elastomeric.
Claim 7
Dependent Claim
31 words
A process according to claim 4 or 5, wherein the acrylic copolymer is a copolymer of a lower alkyl ester of acrylic acid and a lower alkyl ester of methacrylic acid.
Claim 8
Dependent Claim
48 words
A process according to claim 1, wherein the acrylic copolymer is a copolymer of one or both of a lower alkyl ester of acrylic acid and a lower alkyl ester of methacrylic acid with a further monomer selected from the group consisting of styrene, acrylonitrile and mixtures thereof.
Claim 9
Dependent Claim
47 words
A process according to claim 1, wherein the latex solids is a copolymer of vinyl acetate and wherein the copolymerising monomer is selected from the group consisting of a lower alkyl ester of acrylic acid, a lower alkyl ester of methacrylic acid, styrene, acrylonitrile and mixtures thereof.
Claim 10
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.
Claim 11
Dependent Claim
26 words
A process according to claim 1, wherein the resultant mixture of inorganic filler and latex is dewatered and dried by spray drying to form hollow microspheres.
Claim 12
Dependent Claim
100 words
An organic polymer composition which comprises an organic polymer and a white inorganic filler having a specific surface area of at least 1 m 2 g -1 as measured by the BET nitrogen adsorption method, wherein the filler has been treated with a natural or synthetic latex composition comprising a suspension of polymer particles in water wherein the latex solids are selected from the group consisting of acrylic copolymers and copolymers of vinyl acetate, dewatered and then dried, the filler being coated with from 1% to 10% by weight of latex solids, based on the weight of dry inorganic material.
Claim 13
Dependent Claim
100 words
An organic polymer composition which comprises an organic polymer and a white inorganic filler having a specific surface area of at least 1 m 2 g -1 as measured by the BET nitrogen adsorption method, wherein the filler has been treated with a natural or synthetic latex composition comprising a suspension of polymer particles in water wherein the latex solids are selected from the group consisting of acrylic copolymers and copolymers of vinyl acetate, dewatered and then dried, the filler being coated with from 1% to 10% by weight of latex solids, based on the weight of dry inorganic material.
Claim 14
Dependent Claim
17 words
An organic polymer composition as claimed in claim 11, wherein the organic polymer is a thermosetting resin.
References Cited (Backward Citations)
GB625872A
Cited
GB767681A
Cited
US3080256A
Cited
US3068185A
Cited
FR1277177A
Cited
GB920466A
Cited
GB936911A
Cited
GB1263496A
Cited
GB1280216A
Cited
GB1392923A
Cited
FR2311825A1
Cited
GB1536443A
Cited
US4026970A
Cited
GB1580626A
Cited
US4366285A
Cited
US4430436A
Cited
US4374941A
Cited
US4375497A
Cited
GB2126239A
Cited
US4761440A
Cited
EP0202012A2
Cited
US4800103A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |