EP0441530A2
Expired / Lapsed
EP
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Method of treating fibrous materials
Assignee: Dow Silicones UK Ltd
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Filing: 1991-01-30
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Granted: —
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Expires: 2011-01-30
Abstract
Abstract A method of treating fibrous materials comprises applying a polydiorganosiloxane having at least one unit (a) of the general formula and at least one unit (b) of the general formula wherein R is a hydroxyl, monovalent hydrocarbon or hydrocarbonoxy group, R' is a divalent hydrocarbon group which optionally contains oxygen and/or nitrogen, R" is a hydrogen atom or an alkyl group optionally containing an oxygen atom in the form of a hydroxyl group and/or a C=O group, a is 1 or 2, b 2 or 3 and each n from 2 to 8. Treated fibrous materials have improved softness with improved non-yellowing characteristics.
Inventors
- 👤 Stephen Edward Cray
- 👤 Franck André Daniel Renauld
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 00:55
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D06M15/6436; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2962
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
125 words
A method of treating fibrous materials which comprises applying to the fibrous materials a polydiorganosiloxane having at least one unit (b) of the general formula characterised in that the polydiorganosiloxane also has at least one unit (a) of the general formula wherein R denotes a hydroxyl group or a monovalent hydrocarbon or hydrocarbonoxy group having up to 18 carbon atoms, R' denotes a divalent hydrocarbon group which optionally contains oxygen and/or nitrogen, R" denotes a hydrogen atom or an alkyl group optionally containing an oxygen atom in the form of a hydroxyl group and/or a C=O group, a has a value of 1 or 2, b has a value of 2 or 3 and each n independently has a value of from 2 to 8.
Claim 2
Dependent Claim
16 words
A method according to Claim 1 characterised in that the polydiorganosiloxane is a substantially linear polymer.
Claim 3
Dependent Claim
29 words
A method according to either Claim 1 or Claim 2 characterised in that the polydiorganosiloxane consists of from 100 to 1000 units of type (a) and type (b) combined.
Claim 4
Independent Claim
30 words
A method according to any one of the preceding claims characterised in that 1 to 10 mole % of the siloxane units in the polydiorganosiloxane are units of type (a).
Claim 5
Independent Claim
37 words
A method according to any one of the preceding claims characterised in that the polydiorganosiloxane is applied to the fibrous material in the form of an emulsion comprising from 10 to 15% by weight of the polydiorganosiloxane.
Claim 6
Independent Claim
29 words
A method according to any one of the preceding claims characterised in that the application to the fibrous material is followed by drying and heating the treated fibrous material.
Claim 7
Independent Claim
27 words
A method according to any one of the preceding claims characterised in that at least 80% of all R substituents in the polydiorganosiloxane are lower alkyl groups.
Claim 8
Independent Claim
24 words
A method according to any one of the preceding claims characterised in that R' denotes an alkylene group having 2 or 3 carbon atoms.
Claim 9
Independent Claim
32 words
A method according to any one of the preceding claims characterised in that R" denotes a hydrogen atom or a lower alkyl group and in that n has a value of 2.
Claim 10
Independent Claim
42 words
A method according to any one of the preceding claims characterised in that sufficient polydiorganosiloxane is applied to the fibrous substrate to obtain a treatment of from 0.2 to 1% by weight of polydiorganosiloxane based on the weight of the fibrous material.
Claim 11
Dependent Claim
26 words
A textile fabric incorporating fibrous materials characterised in that said fibrous materials have been treated by a method according to any one of the preceding claims.
References Cited (Backward Citations)
No citation records indexed.
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