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EP0420465A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Softening agent for fabrics

Assignee: Unilever PLC
•
Filing: 1990-09-17
•
Granted: —
•
Expires: 2010-09-17
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Abstract

Abstract A method of preparing a fabric softening material which comprises a quaternary ammonium material and at least on C8-28 alkyl or alkenyl group connected to the molecule via an ester linkage, said method comprising the step of reacting a base material with an alkyl or alkenyl group containing material, such that at least one alkyl or alkenyl group is connected to the base material via an ester linkage, wherein the reaction between the base material and the alkyl or alkenyl group containing material is carried out in the presence of an excess of alkyl or alkenyl groups, said excess being effective to lower the pour point of the softener material.

Inventors

  • 👤 Graham Andrew Turner

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-02 17:49
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/0005; C11D3/001; C07; C07C; C07C229/00; C07C229/02; C07C229/04; C07C229/24; C11D1/00; C11D1/38; C11D1/62

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 103 words
A method of preparing a softening material which comprises a quaternary ammonium group comprising the step of reacting a base material with an alkyl or alkenyl group containing material such that at least one alkyl or alkenyl group is connected to the base material via an ester linkage wherein the reaction takes place in the presence of more than a 10 mole % excess of the alkyl or alkenyl group containing material said excess being effective to lower the pour point of the softening material and wherein the softening material has a weight ratio of diester material to monoester material greater than 3:1.
Claim 2
Independent Claim 103 words
A method of preparing a softening material which comprises a quaternary ammonium group comprising the step of reacting a base material with an alkyl or alkenyl group containing material such that at least one alkyl or alkenyl group is connected to the base material via an ester linkage wherein the reaction takes place in the presence of more than a 10 mole % excess of the alkyl or alkenyl group containing material said excess being effective to lower the pour point of the softening material and wherein the softening material has a weight ratio of diester material to monoester material greater than 3:1.
Claim 3
Dependent Claim 27 words
A method as claimed in claim 1 wherein the alkyl or alkenyl group containing material is selected from C₈₋₂₈ fatty acids, their soaps or their C₁₋₆ esters.
Claim 4
Dependent Claim 34 words
A method as claimed in claim 1 or claim 2 wherein the reaction takes place in the presence of more than a 20 mole % excess of the alkyl or alkenyl group containing material.
Claim 5
Independent Claim 22 words
A method as claimed in any preceding claim wherein the weight ratio of diester material to monoester material is greater than 4:1.
Claim 6
Independent Claim 19 words
A method as claimed in any preceding claim wherein the softener material is of formula I as described herein.
Claim 7
Independent Claim 40 words
A method as claimed in any preceding claim wherein the base material is a tertiary amine comprising two R₁ groups as defined in formula I and one 1,2 diol group connected to the nitrogen atom via a (CH₂) n group.
Claim 8
Independent Claim 16 words
A method as claimed in any preceding claim wherein the method comprises a separate quaternisation step.
Claim 9
Dependent Claim 21 words
A fabric conditioning composition comprising a softening material obtained by a method according to one or more of the preceding claims.

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