US3839062A
Expired / Lapsed
US
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Preparation of siliceous material particularly for strengthening polymers
Assignee: GERDEC
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Filing: 1972-07-11
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Granted: 1974-10-01
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Expires: 1992-07-11
Abstract
Abstract The invention relates to a process for preparing a siliceous inorganic material suitable for obtaining organomineral copolymers. This process comprises as a first step the acid hydrolysis of a mineral of the phyllosilicate type, as a second step the chlorination of the hydrolyzed mineral. A third step can be effected comprising the grafting of organic radicals by reacting the chlorinated mineral upon at least one polymerizable monomer in the presence of free radicals.
Inventors
- 👤 C Bleiman
- 👤 J Mercier
- 👤 M Faille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:52
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/20; C01B33/36; C01B33/38; C01B33/42; C01B33/22; C01B33/26; C01B33/40; C01B33/46; C08; C08F; C08F292/00; C08G; C08G83/00; C08G83/001; C08K; C08K9/00; C08K9/04; C09; C09C; C09C1/00; C09C1/28; C01P; C01P2004/00; C01P2004/10; C01P2004/20; C01P2006/00; C01P2006/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A PROCESS FOR PREPARING A SILICEOUS MATERIAL CONSTITUTING A STRENGTHENING FILLER OF POLYMERS COMPRISING: AS A FIRST STEP THE ACID HYDROLYSIS OF A MINERAL OF THE PHYLLOSILICATE TYPE MADE OF TETRAHEDRAL LAYERS AND OCTAHEDRAL LAYERS, BY REACTING THE MINERAL WITH A SOLUTION OF A STRONG INORGANIC ACID UNDER HYDROLYSIS CONDITIONS IN ORDER TO REMOVE A PROPORTION COMPRISED BETWEEN ABOUT 5 AND 80% BY WEIGHT OF THE OCTAHEDRAL LAYER OF THE MINERAL, AND AS A SECOND STEP THE CHLORINATION OF THE HYDROLYZED MINERAL BY REACTING THE HYDROLYZED MINERAL WITH THIONYL CHLORIDE OR PHOSGENE, PURE OF DILUTED IN A SOLVENT AT A CONCENTRATION OF 1 VOLUME PER AT MOST 50 VOLUMES OF SOLVENT.
Claim 2
Dependent Claim
111 words
A PROCESS FOR PREPARING A SILICEOUS MATERIAL CONSTITUTING A STRENGTHENING FILLER OF POLYMERS COMPRISING: AS A FIRST STEP THE ACID HYDROLYSIS OF A MINERAL OF THE PHYLLOSILICATE TYPE MADE OF TETRAHEDRAL LAYERS AND OCTAHEDRAL LAYERS, BY REACTING THE MINERAL WITH A SOLUTION OF A STRONG INORGANIC ACID UNDER HYDROLYSIS CONDITIONS IN ORDER TO REMOVE A PROPORTION COMPRISED BETWEEN ABOUT 5 AND 80% BY WEIGHT OF THE OCTAHEDRAL LAYER OF THE MINERAL, AND AS A SECOND STEP THE CHLORINATION OF THE HYDROLYZED MINERAL BY REACTING THE HYDROLYZED MINERAL WITH THIONYL CHLORIDE OR PHOSGENE, PURE OF DILUTED IN A SOLVENT AT A CONCENTRATION OF 1 VOLUME PER AT MOST 50 VOLUMES OF SOLVENT.
Claim 3
Dependent Claim
40 words
A process according to claim 1 in which the said hydrolysis step is achieved by reacting the mineral with a solution of a strong inorganic acid at a concentration of 1 volume per about 1 to 20 volumes of solvent.
Claim 4
Dependent Claim
28 words
A process according to claim 2 in which the strong inorganic acid is used at a concentration of 1 volume per about 1 to 10 volumes of solvent.
Claim 5
Dependent Claim
24 words
A process according to claim 2 in which the concentration of mineral in the hydrolysis solution is comprised between about 10 and 75 g/l.
Claim 6
Dependent Claim
24 words
A process according to claim 4 in which the concentration of mineral in the hydrolysis solution is comprised between about 35 and 55 g/l.
Claim 7
Dependent Claim
130 words
A process for preparing a siliceous material constituting a strengthening filler of polymers comprising: as a first step the acid hydrolysis of a mineral of the phyllosilicate type made of octahedral layers and tetrahedral layers, by reacting the mineral with a solution of A strong inorganic acid in order to remove a proportion comprised between about 5 and 80 percent by weight of the octahedral layer of the mineral as a second step the chlorination of the hydrolyzed mineral by reacting the hydrolyzed mineral with thionyl chloride pure or diluted in a solvent at a concentration of 1 volume for at most 50 volumes of solvent, the reaction being carried out at a temperature of from about 79* to about 82*C during a time comprised between 1 and 10 hours.
Claim 8
Dependent Claim
130 words
A process for preparing a siliceous material constituting a strengthening filler of polymers comprising: as a first step the acid hydrolysis of a mineral of the phyllosilicate type made of octahedral layers and tetrahedral layers, by reacting the mineral with a solution of A strong inorganic acid in order to remove a proportion comprised between about 5 and 80 percent by weight of the octahedral layer of the mineral as a second step the chlorination of the hydrolyzed mineral by reacting the hydrolyzed mineral with thionyl chloride pure or diluted in a solvent at a concentration of 1 volume for at most 50 volumes of solvent, the reaction being carried out at a temperature of from about 79* to about 82*C during a time comprised between 1 and 10 hours.
Claim 9
Dependent Claim
48 words
A process according to claim 1 in which the chlorination step is achieved by reacting the hydrolyzed mineral with thionyl chloride at a concentration of 1 volume per 0 to 50 volumes of solvent, the concentration of the hydrolyzed mineral being comprised between about 10 and 75 g/l.
Claim 10
Dependent Claim
39 words
A process according to claim 7 in which thionyl chloride is used at a concentration of 1 volume per 1 to 20 volumes of solvent, the concentration of the hydrolyzed mineral being comprised between about 10 and 75 g/l.
Claim 11
Dependent Claim
15 words
A process according to claim 1 in which the mineral is constituted by chrysotile fibers.
Claim 12
Dependent Claim
46 words
A siliceous material to be used particularly for the manufacture of organomineral composites which comprises the siliceous framework of a phyllosilicate in which 5 to 80 percent by weight of the octaedral layers were removed and chlorine atoms linked to the said framework through Si-Cl bonds.
Claim 13
Dependent Claim
46 words
A siliceous material to be used particularly for the manufacture of organomineral composites which comprises the siliceous framework of a phyllosilicate in which 5 to 80 percent by weight of the octaedral layers were removed and chlorine atoms linked to the said framework through Si-Cl bonds.
References Cited (Backward Citations)
US3692816A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |