Patent EP0129322A2 successfully refreshed from Google Patents.
EP0129322A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of treating wool
Assignee: Precision Processes Textiles Ltd
•
Filing: 1984-05-11
•
Granted: —
•
Expires: 2004-05-11
Abstract
Abstract A continuous process for the production of shrink-resistant wool comprises: i) subjecting the wool to an oxidative chlorinating pretreatment; ii) subsequently treating the wool with an aqueous solu tion of a polymer containing quaternized amino groups, preferably one derived from an amino-acrylic monomer; and iii) drying the wool to a chosen moisture level in the range 12% to 18% by weight on the weight of the dry wool, using at least 20% less energy than is required to dry to the same moisture level wool which has been rendered shrink-resistant by conventional continuous processes.
Inventors
- 👤 Ronald James Haslam
- 👤 Kenneth Michael Huddlestone
- 👤 Herbert Martin Longbottom
- 👤 Anthony Szpala
- 👤 Petrus Theodorus Cornelia De Waal
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 07:39
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/322; D06M13/35; D06M13/355; D06M13/358; D06M15/00; D06M15/19; D06M15/21; D06M15/263; D06M15/267
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
A continuous process for the production of shrink-resistant wool comprising the steps of :- i) subjecting the wool to an oxidative chlorinating pretreatment; ii) subsequently treating the wool with an aqueous solution of a polymer so as to cause the polymer to exhaust on to the wool fibres; and iii) drying the wool to a chosen moisture level; characterized in that a polymer containing quaternized amino groups is used in step ii), and in that the wool is dried in step iii) to from 12% to 18% moisture, by weight on the weight of the dry wool, using at least 20% less energy than is required to dry to the same moisture level wool which has been rendered shrink-resistant by conventional continuous processes.
Claim 2
Dependent Claim
123 words
A continuous process for the production of shrink-resistant wool comprising the steps of :- i) subjecting the wool to an oxidative chlorinating pretreatment; ii) subsequently treating the wool with an aqueous solution of a polymer so as to cause the polymer to exhaust on to the wool fibres; and iii) drying the wool to a chosen moisture level; characterized in that a polymer containing quaternized amino groups is used in step ii), and in that the wool is dried in step iii) to from 12% to 18% moisture, by weight on the weight of the dry wool, using at least 20% less energy than is required to dry to the same moisture level wool which has been rendered shrink-resistant by conventional continuous processes.
Claim 3
Dependent Claim
30 words
A process as claimed in claim 1, wherein the chlorinating pretreatment is carried out at a level of 0.25-2.0% active chlorine (by weight on the weight of the dry wool).
Claim 4
Dependent Claim
46 words
A process as claimed in claim 1 or claim 2, wherein the polymer is a copolymer of at least one amino-group-containing monomer with at least one other monomer, in which the mole ratio of the amino-group-containing monomer(s) to the other monomer(s) is from 1:1 to 1:10.
Claim 5
Dependent Claim
21 words
A process as claimed in any of the preceding claims, wherein the polymer is derived from at least one amino-acrylic monomer.
Claim 6
Dependent Claim
32 words
A process as claimed in any of the preceding claims, wherein the polymer is applied to the wool at a level of 0.4-2.0% (by weight on the weight of the dry wool).
Claim 7
Dependent Claim
20 words
A process as claimed in any one of the preceding claims, wherein the polymer contains amino groups quaternized using epichlorohydrin.
Claim 8
Dependent Claim
26 words
A process as claimed in any of the preceding claims, wherein the polymer is applied to the wool in the presence of a water-soluble cationic material.
Claim 9
Dependent Claim
42 words
A process as claimed in claim 7, wherein the water-soluble cationic material has the formula wherein R is C 1 - C 22 alkyl or alkenyl, R 1 is H or CH 3 , and x + y = 2 - 40.
Claim 10
Dependent Claim
28 words
A process as claimed in claim 7 or claim 8, wherein the material is present at a level of 2-20% by weight on the weight of the polymer.
Claim 11
Dependent Claim
23 words
A process as claimed in any of the preceding claims, wherein the wool is dried to a moisture level of 12-15% (by weight).
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.