Patent US3962054A successfully refreshed from Google Patents.
US3962054A
Expired / Lapsed
US
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Process for the treatment of cellulosic textile materials
Assignee: Bpifrance Financement SA
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Filing: 1973-10-26
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Granted: 1976-06-08
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Expires: 1993-10-26
Abstract
Abstract A process for the treatment of cellulosic textile materials comprising the following successive steps: effecting grafting of the cellulose textile material with a monomer which, when formed into a polymer, has the characteristics of an elastomer at ambient temperature; effecting irradiation treatment by ionizing radiation of the grafted cellulose material so as to achieve cross-linking of the grafts formed, thus leading to permanent crease resistant properties; and effecting post-irradiation treatment by storage enabling the cross-linking to be completed.
Inventors
- 👤 Daniel Wattiez
- 👤 Roger Chatelin
- 👤 Paul Fabre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:03
CPC Classifications
D; D06; D06M; D06M14/00; D06M14/18; D06M14/20; D06M14/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
A process for the treatment of cellulosic textile materials comprising the following successive steps: a. grafting the cellulose textile material with an acrylic acid ester monomer or a mixture thereof with a comonomer copolymerizable therewith in the presence of a chemical initiator agent, with a grafting ratio of a least 6% in relation to the weight of the starting cellulose material; b. effecting irradiation treatment by ionising radiation of the grafted cellulose material obtained in the preceding stage with an irradiation dose of from 0.5 Mrads to 10 mards; and c. effecting post-irradiation treatment by storage of the irradiated product for a period of from 1 day to 14 days at ambient temperature.
Claim 2
Dependent Claim
113 words
A process for the treatment of cellulosic textile materials comprising the following successive steps: a. grafting the cellulose textile material with an acrylic acid ester monomer or a mixture thereof with a comonomer copolymerizable therewith in the presence of a chemical initiator agent, with a grafting ratio of a least 6% in relation to the weight of the starting cellulose material; b. effecting irradiation treatment by ionising radiation of the grafted cellulose material obtained in the preceding stage with an irradiation dose of from 0.5 Mrads to 10 mards; and c. effecting post-irradiation treatment by storage of the irradiated product for a period of from 1 day to 14 days at ambient temperature.
Claim 3
Dependent Claim
23 words
A process according to claim 1 in which, after effecting the post-irradiation treatment, stabilisation treatment is effected of the irradiated and stored product.
Claim 4
Dependent Claim
18 words
A process as claimed in claim 1 in which the said grafting ratio is between 10% and 18%.
Claim 5
Dependent Claim
17 words
A process according to claim 1 in which the irradiation dose is between 1 and 4 Mrads.
Claim 6
Dependent Claim
21 words
A process as claimed in claim 1 in which the said storage is for a period of 7 to 9 days.
Claim 7
Dependent Claim
21 words
A process according to claim 1 in which the acrylic acid ester monomer is in admixture with a comonomer copolymerizable therewith.
Claim 8
Dependent Claim
12 words
A process according to claim 6 in which the comonomer is acrylonitrile.
Claim 9
Dependent Claim
31 words
A process according to claim 1 in which the acrylic acid ester monomer is at least one compound selected from the group consisting of n-butyl acrylate and ethyl-2-hexyl acrylate with acrylonitrile.
Claim 10
Dependent Claim
38 words
A process according to claim 1 in which the grafting is effected in the presence of ceric ions as the chemical initiator agent and with the monomer which is to be grafted in the vapour or liquid phase.
Claim 11
Dependent Claim
103 words
A process according to claim 9 in which the cellulose material which is to be grafted is impregnated with an ammoniacal ceric salt, with a concentration of from 0.02 M to 0.1 M, dissolved in a dilute aqueous solution of the acid corresponding to the anion of the ceric salt, with a concentration of from 0.25 to 1 N, the impregnated cellulose material is squeezed out to a retention of 70 to 100%, and it is contacted with the monomer in the form of the vapour or dissolved in a solvent until the desired grafting ratio is achieved, after which it is rinsed.
Claim 12
Dependent Claim
26 words
A process according to claim 1 in which the irradiation treatment is effected in the presence of a source of gamma radiation or of accelerated electrons.
Claim 13
Dependent Claim
18 words
A process according to claim 2 in which the stabilisation treatment is effected with the aid of hydroquinone.
Claim 14
Dependent Claim
16 words
A process according to claim 12 in which the hydroquinone is added to a dye bath.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |