US6077966A
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Preparation of water-soluble organic silicon compounds
Assignee: Shin-Etsu Chemical Co Ltd
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Filing: 1996-09-06
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Granted: 2000-06-20
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Expires: 2016-09-06
Abstract
Abstract Water-soluble organic silicon compounds are prepared by effecting co-hydrolysis of (A) 1-30 parts of an alkyltrialkoxysilane of R1Si(OR2)3 or a partial hydrolyzate thereof, (B) 70-90 parts of an alkoxy-containing siloxane of R3a(OR2)bSiO(4-a-b)/2, and (C) 1-20 parts of an amino-containing alkoxysilane of R4R5NR6-SiR7n(OR2)3-n or a partial hydrolyzate thereof in the presence of an organic or inorganic acid. R1 is a C7-C18 alkyl group, R2 is a C1-C4 alkyl group, R3 is a C1-C6 alkyl group, R4 and R5 are a hydrogen atom, C1-C15 alkyl or aminoalkyl group, R6 is a divalent C1-C18 hydrocarbon group, and R7 is a C1-C4 alkyl group. Letters a and b are 0.75</=a</=1.5, 0.2</=b</=2, and 0.95<a+b<3.4. These water-soluble organic silicon compounds are fully water soluble and shelf stable and can be used as an agent for preventing porous materials from water absorption simply after dilution with water. Porous materials are coated or impregnated with the compounds so that they are given excellent water repellency and water absorption-preventing effect.
Inventors
- 👤 Kazuyuki Matsumura
- 👤 Mitsuo Asai
- 👤 Shoji Ichinohe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:51
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C04; C04B; C04B41/00; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/4922; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/0838; C07F7/18; C07F7/1804; C08L; C08L97/00; C08L97/02; B; B27; B27K; B27K2240/00; B27K2240/70; B27K3/00; B27K3/02; B27K3/15; C08L83/00; C08L83/04
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
224 words
A method for preparing a water-soluble organic silicon compound comprising effecting co-hydrolysis in the presence of an organic or inorganic acid of (A) 1 to 30 parts by weight of an alkyltrialkoxysilane of the following general formula (1): R.sup.1 Si(OR.sup.2).sub.3 ( 1) wherein R 1 is a hydrocarbon group having 7 to 18 carbon atoms and R 2 is an alkyl group having 1 to 4 carbon atoms, or a partial hydrolyzate thereof, (B) 70 to 90 parts by weight of an alkoxy-containing siloxane of the following general formula (2): R.sup.3.sub.a (OR.sup.2).sub.b SiO.sub.(4-a-b)/2 ( 2) wherein R 2 is as defined above, R 3 is an alkyl group having 1 to 6 carbon atoms, letter a is a positive number of 0.75 to 1.5, b is a positive number of 0.2 to 2, and 0.95<a+b<3.4, and (C) 1 to 20 parts by weight of an amino-containing alkoxysilane of the following general formula (3): R.sup.4 R.sup.5 NR.sup.6 --SiR.sup.7.sub.n (OR.sup.2).sub.3-n( 3) wherein R 2 is as defined above, R 4 and R 5 are independently selected from the group consisting of a hydrogen atom, alkyl and aminoalkyl groups having 1 to 15 carbon atoms, R 6 is a divalent hydrocarbon group having 1 to 18 carbon atoms, R 7 is an alkyl group having 1 to 4 carbon atoms, and letter n is 0 or 1.
Claim 2
Independent Claim
224 words
A method for preparing a water-soluble organic silicon compound comprising effecting co-hydrolysis in the presence of an organic or inorganic acid of (A) 1 to 30 parts by weight of an alkyltrialkoxysilane of the following general formula (1): R.sup.1 Si(OR.sup.2).sub.3 ( 1) wherein R 1 is a hydrocarbon group having 7 to 18 carbon atoms and R 2 is an alkyl group having 1 to 4 carbon atoms, or a partial hydrolyzate thereof, (B) 70 to 90 parts by weight of an alkoxy-containing siloxane of the following general formula (2): R.sup.3.sub.a (OR.sup.2).sub.b SiO.sub.(4-a-b)/2 ( 2) wherein R 2 is as defined above, R 3 is an alkyl group having 1 to 6 carbon atoms, letter a is a positive number of 0.75 to 1.5, b is a positive number of 0.2 to 2, and 0.95<a+b<3.4, and (C) 1 to 20 parts by weight of an amino-containing alkoxysilane of the following general formula (3): R.sup.4 R.sup.5 NR.sup.6 --SiR.sup.7.sub.n (OR.sup.2).sub.3-n( 3) wherein R 2 is as defined above, R 4 and R 5 are independently selected from the group consisting of a hydrogen atom, alkyl and aminoalkyl groups having 1 to 15 carbon atoms, R 6 is a divalent hydrocarbon group having 1 to 18 carbon atoms, R 7 is an alkyl group having 1 to 4 carbon atoms, and letter n is 0 or 1.
Claim 3
Dependent Claim
74 words
The method of claim 1 wherein the co-hydrolysis includes effecting hydrolysis of an alkyltrialkoxysilane of formula (1) or a partial hydrolyzate thereof in the presence of an organic or inorganic acid, mixing the resulting hydrolyzate with an alkoxy-containing siloxane of formula (2), effecting hydrolysis of the mixture in the presence of an organic or inorganic acid, and finally reacting the resulting hydrolyzates with an amino-containing alkoxysilane of formula (3) or a partial hydrolyzate thereof.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein the hydrolysis is carried out in an alcoholic solvent.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein the water-soluble organic silicon compound obtained has a weight average molecular weight of 500 to 5,000.
Claim 6
Dependent Claim
26 words
A method of preventing water absorption of a porous material by applying thereto a water-soluble organic silicon compound obtained according to the method of claim 1.
Claim 7
Dependent Claim
20 words
An agent for preventing water absorption comprising a water-soluble organic silicon compound obtained according to the method of claim 1.
Claim 8
Dependent Claim
26 words
A method of preventing water absorption of a porous material by applying thereto a water-soluble organic silicon compound obtained according to the method of claim 2.
Claim 9
Dependent Claim
21 words
An agent for preventing water absorption which comprises a water-soluble organic silicon compound obtained according to the method of claim 2.
Claim 10
Dependent Claim
16 words
The method of claim 1, wherein R 1 is an alkyl group of 7-18 carbon atoms.
Claim 11
Dependent Claim
16 words
The method of claim 1, wherein R 1 is a C 7 -C 10 alkyl group.
Claim 12
Dependent Claim
16 words
The method of claim 1, wherein R 6 is an alkylene group of 1-18 carbon atoms.
Claim 13
Dependent Claim
30 words
The method of claim 1, wherein there are 5 to 20 parts of component (A), 70 to 80 parts of component (B) and 10 to 20 parts of component (C).
Claim 14
Dependent Claim
26 words
The method of claim 1, wherein the organic or inorganic acid is hydrochloric, sulfuric, methanesulfonic, formic, acetic, propionic, citric, oxalic or maleic acid or mixtures thereof.
Claim 15
Dependent Claim
31 words
The method of claim 2, wherein the water for hydrolysis of the alkyltrialkoxysilane (A) is added to component (A) in an amount of 1 to 4 mol per mol of (A).
Claim 16
Dependent Claim
33 words
The method of claim 2, wherein the acid for hydrolysis of the alkyltrialkoxysilane (A) is provided in an amount of 2 to 40 parts by weight per 100 parts by weight of (A).
Claim 17
Dependent Claim
27 words
The method of claim 2, wherein the hydrolysis of the alkyltrialkoxysilane (A) is conducted at a temperature of 10 to 40° C. for 1 to 3 hours.
Claim 18
Dependent Claim
42 words
The method of claim 2, wherein the amount of organic or inorganic acid used for hydrolysis of the mixture of the resulting hydrolyzate and the alkoxy-containing siloxane (B) is 2 to 40 parts by weight per 100 parts by weight of (B).
Claim 19
Dependent Claim
34 words
The method of claim 2, wherein the amount of water used for hydrolysis of the mixture of the resulting hydrolyzate and the alkoxy-containing siloxane (B) is 0.5 to 1.5 mol per mol of (B).
Claim 20
Dependent Claim
24 words
The agent of claim 6, wherein the water-soluble organic silicon compound is diluted with water to a concentration of 1 to 50% by weight.
Claim 21
Dependent Claim
24 words
The agent of claim 8, wherein the water-soluble organic silicon compound is diluted with water to a concentration of 1 to 50% by weight.
References Cited (Backward Citations)
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