US4401776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pourable solid mixture
Assignee: BASF Corp
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Filing: 1981-02-23
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Granted: 1983-08-30
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Expires: 2001-02-23
Abstract
Abstract Polymerizable liquid synthetic resins, liquid reactive constituents of synthetic resins or liquid additives for plastics, in each case containing mineral fillers, are converted to dry, pourable mixtures by mixing with 0.25-5% by weight of a crystalline synthetic calcium silicate, which can be in diverse stages of hydration and has a high length/width ratio and width dimensions of less than 1 μm, it being possible, by this means, to employ the resins not only as casting resins but also as compression moulding resins and adhesives. In addition, handling and processability are improved.
Inventors
- 👤 Kurt Munk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:42
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A pourable, solid mixture which contains, based on the total mixture, (a) 49.75 to 7.5% by weight of a liquid synthetic resin which is an epoxide resin, unsaturated polyester resin, polyurethane resin, phenol/formaldehyde resin, urea/formaldehyde resin, melamine/formaldehyde resin, oil-modified alkyd resin, polysilicone or unsaturated polyimide, (b) 50 to 87.5% by weight of a mineral filler, and (c) 0.25 to 5% by weight of a crystalline synthetic calcium silicate, which can be in diverse stages of hydration and has a high length/width ratio and a width dimension of less than 1 μm.
Claim 2
Dependent Claim
91 words
A pourable, solid mixture which contains, based on the total mixture, (a) 49.75 to 7.5% by weight of a liquid synthetic resin which is an epoxide resin, unsaturated polyester resin, polyurethane resin, phenol/formaldehyde resin, urea/formaldehyde resin, melamine/formaldehyde resin, oil-modified alkyd resin, polysilicone or unsaturated polyimide, (b) 50 to 87.5% by weight of a mineral filler, and (c) 0.25 to 5% by weight of a crystalline synthetic calcium silicate, which can be in diverse stages of hydration and has a high length/width ratio and a width dimension of less than 1 μm.
Claim 3
Dependent Claim
27 words
A mixture according to claim 1, which contains component (a) in a proportion of 35-15% by weight and component (b) in a proportion of 65-85% by weight.
Claim 4
Dependent Claim
57 words
A mixture according to claim 1, wherein the mineral filler is quartz powder, mica, talc, asbestos, slate flour, kaolin, wollastonite, powdered chalk, dolomite, magnesium carbonate, gypsum, barytes, aluminium oxide, bentones, silicic acid aerogel, lithopones, titanium dioxide, carbon black, graphite, metal oxides, glass powders, glass spheres, glass fibres, zinc sulfide, silicon carbide, cristoballite or a mixture of fillers.
Claim 5
Dependent Claim
21 words
A mixture according to claim 1, wherein the calcium silicate has a length/width ratio in the range from 10:1 to 200:1.
Claim 6
Dependent Claim
26 words
A mixture according to claim 1, wherein the calcium silicate is acicular crystallised xonotlite of the formula Ca 6 [(OH) 2 /Si 6 O 17 ].
Claim 7
Dependent Claim
51 words
A process for the preparation of a pourable, solid mixture according to claim 1 which comprises adding components (a), (b) and (c) to a stirred vessel, and stirring the resulting mixture to disperse the calcium silicate, component (c), homogeneously therein and to convert the mixture into a solid, dry pourable material.
Claim 8
Dependent Claim
114 words
A pourable, solid mixture which contains, based on the total mixture, (a) 49.75 to 7.5% by weight of a liquid which is a combination of a liquid epoxy resin and a liquid curing agent therefor; or is a liquid epoxy resin which additionally contains a finely divided solid curing agent therefor; or is a liquid curing agent which additionally contains a finely divided solid epoxy resin curable therewith, (b) 50 to 87.5% by weight of a mineral filler, and (c) 0.25 to 5% by weight of a crystalline synthetic calcium silicate, which can be in diverse stages of hydration and has a high length/width ratio and a width dimension of less than 1 μm.
Claim 9
Dependent Claim
114 words
A pourable, solid mixture which contains, based on the total mixture, (a) 49.75 to 7.5% by weight of a liquid which is a combination of a liquid epoxy resin and a liquid curing agent therefor; or is a liquid epoxy resin which additionally contains a finely divided solid curing agent therefor; or is a liquid curing agent which additionally contains a finely divided solid epoxy resin curable therewith, (b) 50 to 87.5% by weight of a mineral filler, and (c) 0.25 to 5% by weight of a crystalline synthetic calcium silicate, which can be in diverse stages of hydration and has a high length/width ratio and a width dimension of less than 1 μm.
Claim 10
Dependent Claim
27 words
A mixture according to claim 7 which contains component (a) in a proportion of 35-15% by weight and component (b) in a proportion of 65-85% by weight.
Claim 11
Dependent Claim
57 words
A mixture according to claim 7, wherein the mineral filler is quartz powder, mica, talc, asbestos, slate flour, kaolin, wollastonite, powdered chalk, dolomite, magnesium carbonate, gypsum, barytes, aluminium oxide, bentones, silicic acid aerogel, lithopones, titanium dioxide, carbon black, graphite, metal oxides, glass powders, glass spheres, glass fibres, zinc sulfide, silicon carbide, cristoballite or a mixture of fillers.
Claim 12
Dependent Claim
21 words
A mixture according to claim 7, wherein the calcium silicate has a length/width ratio in the range from 10:1 to 200:1.
Claim 13
Dependent Claim
26 words
A mixture according to claim 7, wherein the calcium silicate is acicular crystallised xonotlite of the formula Ca 6 [(OH) 2 /Si 6 O 17 ].
Claim 14
Dependent Claim
51 words
A process for the preparation of a pourable, solid mixture according to claim 7 which comprises adding components (a), (b) and (c) to a stirred vessel, and stirring the resulting mixture to disperse the calcium silicate, component (c), homogeneously therein and to convert the mixture into a solid, dry pourable material.
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |