EP0068671A2
Expired / Lapsed
EP
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Siloxane compositions and process for treatment of materials
Assignee: Dow Silicones UK Ltd
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Filing: 1982-06-08
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Granted: —
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Expires: 2002-06-08
Abstract
Abstract A composition characterized in that it contains (A) a polydiorganosiloxane having at least one silicon-bonded OX group, in which X represents hydrogen, alkyl or alkoxyalkyl, and at least one aminoalkyl or polyaminoalkyl acid salt substituent derived from a water-soluble organic or inorganic acid, (B) a silicon compound e.g. methyltrimethoxysilane which is soluble in (C) and which has per molecule more than two silicon-bonded groups reactive with the OX groups in (A), and (C) a water-soluble solvent for (A) selected from aliphatic alcohols, glycols and polyglycols and their ethers and esters. The compositions are useful as coating compositions and in particular can be diluted with water for application as water repellents to masonry and similar substrates.
Inventors
- 👤 Peter John Clark
- 👤 Neville Joseph Whitfield
- 👤 Stephen Kenneth Lucas
- 👤 John Geoffrey Coombs Price
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 13:13
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/495; C04B41/4961; C04B41/60; C04B41/61; C04B41/62; C04B41/64; C08; C08K; C08K5/00; C08K5/04; C08K5/05; C08K5/54
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
164 words
A composition which comprises (A) a polydiorganosiloxane having a molecular weight of at least 350 and at least one silicon-bonded -OX group, wherein X represents a hydrogen atom, an alkyl group or an alkoxyalkyl group, the said polydiorganosiloxane having at least one silicon-bonded substituent selected from aminoalkyl and polyaminoalkyl acid salt groups derived from a water-soluble organic or inorganic acid, the proportion of aminoalkyl and/or polyaminoalkyl acid salt substituents being sufficient to provide at least 0.5 per cent by weight of amino nitrogen in the polydiorganosiloxane, at least 40 per cent of the total silicon-bonded substituents in the polydiorganosiloxane being methyl groups and any remaining substituents being monovalent hydrocarbon groups having from 2 to 10 carbon atoms, (B) a silicon compound which is soluble in (C) and which has per molecule more than two silicon-bonded groups reactive with the -OX groups in (A), and (C) a water-soluble solvent for (A) selected from aliphatic alcohols, glycols, polyglycols and ethers and esters of glycols and polyglycols.
Claim 2
Dependent Claim
164 words
A composition which comprises (A) a polydiorganosiloxane having a molecular weight of at least 350 and at least one silicon-bonded -OX group, wherein X represents a hydrogen atom, an alkyl group or an alkoxyalkyl group, the said polydiorganosiloxane having at least one silicon-bonded substituent selected from aminoalkyl and polyaminoalkyl acid salt groups derived from a water-soluble organic or inorganic acid, the proportion of aminoalkyl and/or polyaminoalkyl acid salt substituents being sufficient to provide at least 0.5 per cent by weight of amino nitrogen in the polydiorganosiloxane, at least 40 per cent of the total silicon-bonded substituents in the polydiorganosiloxane being methyl groups and any remaining substituents being monovalent hydrocarbon groups having from 2 to 10 carbon atoms, (B) a silicon compound which is soluble in (C) and which has per molecule more than two silicon-bonded groups reactive with the -OX groups in (A), and (C) a water-soluble solvent for (A) selected from aliphatic alcohols, glycols, polyglycols and ethers and esters of glycols and polyglycols.
Claim 3
Dependent Claim
18 words
A composition as claimed in Claim 1 wherein polydiorganosiloxane (A) has -OX groups bonded to terminal silicon atoms.
Claim 4
Dependent Claim
24 words
A composition as claimed in Claim 1 or Claim 2 wherein polydiorganosiloxane (A) has a molecular weight within the range from 800 to 4000.
Claim 5
Dependent Claim
44 words
A composition as claimed in any of the preceding claims wherein the polyaminoalkyl acid salt substituents are derived from -(CH 2 ) 3 NH(CH 2 ) 2 NH 2 and/or -CH 2 CH.CH 3 CH 2 NH CH 2 CH 2 NH 2 groups.
Claim 6
Dependent Claim
19 words
A composition as claimed in any one of the preceding claims which also comprises an organic or inorganic acid.
Claim 7
Dependent Claim
35 words
A composition as claimed in any of the preceding claims which comprises by weight 100 parts of the polydiorganosiloxane (A), from 1 to 75 parts of (B), and from 50 to 200 parts of (C).
Claim 8
Dependent Claim
64 words
A composition as claimed in any one of the preceding claims wherein (B) is selected from silanes of the general formula R Si Y 3 , wherein R represents an alkyl, alkenyl aryl, alkoxy or alkoxyalkoxy group and each Y represents an alkoxy or alkoxyalkoxy group, R and Y each having less than 7 carbon atoms, and partial hydrolysates and condensates of such silanes.
Claim 9
Dependent Claim
15 words
A composition as claimed in any one of the preceding claims wherein (C) is isopropanol.
Claim 10
Dependent Claim
15 words
A composition as claimed in any one of the preceding claims which also comprises water.
Claim 11
Dependent Claim
22 words
A process for rendering a substrate hydrophobic which comprises applying thereto a composition as claimed in any one of the preceding claims.
Claim 12
Dependent Claim
12 words
A process as claimed in Claim 10 wherein the substrate is masonry.
References Cited (Backward Citations)
No citation records indexed.
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