EP0528038A1
Expired / Lapsed
EP
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Composite composition excellent in transparency and production thereof
Assignee: Mitsubishi Chemical Corp
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Filing: 1991-12-27
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Granted: —
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Expires: 2011-12-27
Abstract
Abstract A composite composition wherein a siliceous polycondensate (A) prepared by the hydrolysis and polycondensation of at least one alkoxysilane compound and a polymer (B) of a radical polymerizable vinyl compound (B') mainly comprising at least one compound selected from the group consisting of acrylic acid, methacrylic acid, acrylic ester and methacrylic ester form a homogeneous mixture, which is produced by the radical polymerization of the vinyl compound (B') in a state in which the polycondensate (A) is dissolved in the compound (B'). This composition is excellent in the transparency, rigidity, toughness and thermal resistance, and is useful in the fields where inorganic glass has been used.
Inventors
- 👤 Naoki Central Research Laboratories Yamamoto
- 👤 Hiroki Otake Plants Hatakeyama
- 👤 Hiroyuki Central Research Laboratories Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 21:20
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/02; C08F; C08F283/00; C08F283/12; C08F283/124; C08G; C08G77/00; C08G77/02; C08G77/42; C08G77/442; C08L33/04; C08L83/00; C08L83/04; C08G77/04
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
134 words
A composite composition consisting essentially of (A) a silica polycondensate formed by hydrolysis and polycondensation of one or more silane compounds of the general formula SiR¹ a R² b (OR³) c (I) where R¹ and R² are hydrocarbon radicals of 1 to 10 carbon atoms which may contain an ether linkage or ester linkage, R³ is a hydrogen atom or a hydrocarbon radical of 1 to 10 carbon atoms, a and b are whole numbers of 0 to 3, and c is equal to (4-a-b) and represents a whole number of 1 to 4; and (B) a polymer of a radical-polymerizable vinyl compound (B') composed chiefly of one or more monomers selected from the group consisting of acrylic acid, methacrylic acid, acrylic esters and methacrylic esters; the components (A) and (B) being intermingled homogeneously.
Claim 2
Dependent Claim
38 words
A composite composition as claimed in claim 1 which consists essentially of 1 to 99% by weight of the silica polycondensate (A) and 99 to 1% by weight of the polymer (B) of the radical-polymerizable vinyl compound (B').
Claim 3
Dependent Claim
38 words
A composite composition as claimed in claim 1 which consists essentially of 10 to 90% by weight of the silica polycondensate (A) and 90 to 10% by weight of the polymer (B) of the radical-polymerizable vinyl compound (B').
Claim 4
Dependent Claim
38 words
A composite composition as claimed in claim 1 which consists essentially of 20 to 70% by weight of the silica polycondensate (A) and 80 to 30% by weight of the polymer (B) of the radical-polymerizable vinyl compound (B').
Claim 5
Dependent Claim
88 words
A composite composition as claimed in claim 1 wherein the silica polycondensate (A) is formed from 1 to 100 parts by weight of a silane compound (A-1) of the general formula Si(OR³)₄ (II) where R³ is as previously defined, and 0 to 99 parts by weight of a silane compound (A-2) of the general formula SiR¹ a R² b (OR³) d (III) where R¹, R², R³, a and b are as previously defined, and d is equal to (4-a-b) and represents a whole number of 1 to 3.
Claim 6
Dependent Claim
39 words
A composite composition as claimed in claim 5 wherein the silica polycondensate (A) is formed from 20 to 100 parts by weight of the silane compound (A-1) and 0 to 80 parts by weight of the silane compound (A-2).
Claim 7
Dependent Claim
39 words
A composite composition as claimed in claim 5 wherein the silica polycondensate (A) is formed from 50 to 100 parts by weight of the silane compound (A-1) and 0 to 50 parts by weight of the silane compound (A-2).
Claim 8
Dependent Claim
21 words
A composite composition as claimed in claim 5 wherein the silane compound (A-1) is at least one of tetramethoxysilane and tetraethoxysilane.
Claim 9
Dependent Claim
28 words
A composite composition as claimed in claim 5 wherein the silane compound (A-2) is at least one compound selected from the group consisting of methyltrimethoxysilane, vinyltrimethoxysilane and γ-methacryloyloxypropyltrimethoxysilane.
Claim 10
Dependent Claim
55 words
A composite composition as claimed in claim 1 or 5 wherein the radical-polymerizable vinyl compound (B') is composed of 50 to 100% by weight of at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, acrylic esters and methacrylic esters, and 0 to 50% by weight of another monomer copolymerizable therewith.
Claim 11
Dependent Claim
36 words
A composite composition as claimed in claim 10 wherein the other copolymerizable monomer is a vinyl compound having at least one functional group selected from the group consisting of hydroxyl, carboxyl, halogenated silyl and alkoxysilyl groups.
Claim 12
Dependent Claim
31 words
A composite composition as claimed in claim 11 wherein the vinyl compound is at least one compound selected from the group consisting of 2-hydroxyethyl methacrylate, methacrylic acid, vinyltrichlorosilane, vinyltrimethoxysilane and γ-methacryloyloxypropyltrimethoxysilane.
Claim 13
Dependent Claim
35 words
A composite composition as claimed in claim 1 or 5 wherein the radical-polymerizable vinyl compound (B') is composed chiefly of at least one monomer selected from the group consisting of methyl methacrylate and 2-hydroxyethyl methacrylate.
Claim 14
Dependent Claim
39 words
A composite composition as claimed in claim 1 or 5 which has a SiO₂ content of not less than 15% by weight and a haze of not greater than 3% as measured at a plate thickness of 3 mm.
Claim 15
Dependent Claim
32 words
A composite composition as claimed in claim 1 or 5 which is obtained by dissolving the silica polycondensate (A) in the radical-polymerizable vinyl compound (B') and polymerizing the radical-polymerizable vinyl compound (B').
Claim 16
Dependent Claim
47 words
A composite composition as claimed in claim 1 or 5 wherein the silica polycondensate (A) contains a silica polycondensate whose silanolic hydroxyl groups and/or alkoxy groups have been replaced by a vinyl compound (C-1) having a hydroxyl group or a vinyl compound (C-2) having a carboxyl group.
Claim 17
Dependent Claim
66 words
A composite composition as claimed in claim 16 wherein the vinyl compound (C-1) having a hydroxyl group is at least one compound selected from the group consisting of allyl alcohol, methallyl alcohol, 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate, and the vinyl compound (C-2) having a carboxyl group is at least one compound selected from the group consisting of (meth)acrylic acid, crotonic acid, itaconic acid and maleic anhydride.
Claim 18
Dependent Claim
152 words
A process for producing composite compositions which comprises the steps of providing a silica polycondensate (A) formed by hydrolysis and polycondensation of one or more silane compounds of the general formula SiR¹ a R² b (OR³) c (I) where R¹ and R² are hydrocarbon radicals of 1 to 10 carbon atoms which may contain an ether linkage or ester linkage, R³ is a hydrogen atom or a hydrocarbon radical of 1 to 10 carbon atoms, a and b are whole numbers of 0 to 3, and c is equal to (4-a-b) and represents a whole number of 1 to 4; preparing a mixed solution by dissolving the silica polycondensate (A) in a radical-polymerizable vinyl compound (B') composed chiefly of at least one monomer selected from the group consisting of acrylic acid, methacrylic acid, acrylic esters and methacrylic esters, or in a partial polymer thereof; and effecting radical polymerization of the mixed solution.
Claim 19
Dependent Claim
34 words
A process for producing composite compositions as claimed in claim 18 wherein the radical polymerization of the mixed solution and further polycondensation of the silica polycondensate (A) in the mixed solution are effected concurrently.
Claim 20
Dependent Claim
40 words
A process for producing composite compositions as claimed in claim 18 wherein the radical polymerization of the mixed solution and further polycondensation of the silica polycondensate (A) in the mixed solution are effected at a temperature of 40 to 150°C.
Claim 21
Dependent Claim
47 words
A process for producing composite compositions as claimed in claim 18 wherein the mixed solution is prepared by dissolving the silica polycondensate (A) in a solvent, mixing the resulting solution with the component (B'), and then distilling off the solvent and water associated with the component (A).
Claim 22
Dependent Claim
46 words
A process for producing composite compositions as claimed in claim 18 wherein the mixed solution is prepared by dissolving the silica polycondensate (A) in a solvent to form a solution and adding the component (B') to the solution while distilling off the solvent and water therefrom.
References Cited (Backward Citations)
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