Patent US3940377A successfully refreshed from Google Patents.
US3940377A
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Method of activating polymers
Assignee: Polymer Res Corp of America
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Filing: 1972-06-19
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Granted: 1976-02-24
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Expires: 1992-06-19
Abstract
Abstract The invention relates to the activation of polymers and more particularly to certain classes of high polymeric material which are not susceptible to dyeing or the like whereby the polymeric material is given a functional group which can react with dyes, monomeric materials, etc. Polymeric materials such as polyolefins, e.g. polypropylene, polyesters and polyvinylchloride are sulfonated by reaction with a sulfonating agent in the presence of a hydrocarbon and/or a chlorinated hydrocarbon. The resulting sulfonated polymer can then be easily dyed or can be reacted with monomers to obtain dyeable polymers.
Inventors
- 👤 Carl Horowitz
- 👤 Leon Pinczuk
- 👤 Michael Dichter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:58
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08F; C08F291/00; C08F291/14; C08F8/00; C08F8/30; C08F8/32; C08F8/34; C08F8/36; C08G; C08G63/00; C08G63/91; D; D06; D06P; D06P3/00; D06P3/79; D06P3/791; D06P3/792; D06P5/00; D06P5/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
Method of activating a polymeric material, which comprises subjecting a polymeric material the surface of which contains thereon a substance selected from the goup consisting of colloidal silver and silver oxide so that strongly ionic materials can be grafted onto said surface to the action of a sulfonating agent in a solvent medium hydrocarbon, whereby said polymeric material becomes rapidly sulfonated and easily subject to reaction with ionic materials including dyes.
Claim 2
Dependent Claim
71 words
Method of activating a polymeric material, which comprises subjecting a polymeric material the surface of which contains thereon a substance selected from the goup consisting of colloidal silver and silver oxide so that strongly ionic materials can be grafted onto said surface to the action of a sulfonating agent in a solvent medium hydrocarbon, whereby said polymeric material becomes rapidly sulfonated and easily subject to reaction with ionic materials including dyes.
Claim 3
Dependent Claim
20 words
Method according to claim 1 wherein said solvent medium is selected from the group consisting of hydrocarbons and chlorinated hydrocarbons.
Claim 4
Dependent Claim
13 words
Method according to claim 1 wherein said solvent medium is a chlorinated hydrocarbon.
Claim 5
Dependent Claim
20 words
Method according to claim 2 wherein said polymeric material is selected from the group consisting of polyolefins, polyesters and polyvinylchlorides.
Claim 6
Dependent Claim
34 words
Method according to claim 2 wherein said sulfonating agent is selected from the group consisting of sulfuric acid, chlorosulfonic acid, sulfurous acid, sulfur dioxide, sulfur trioxide, fuming sulfuric acid, sulfuryl chloride and pyrosulfuryl chloride.
Claim 7
Dependent Claim
32 words
Method according to claim 5 wherein said solvent medium is a chlorinated hydrocarbon selected from the group consisting of ethylene dichloride, methylene dichloride, triethylene chloride, carbon tetrachloride, methyl chloride, chlorobenzene and dichlorobenzene.
Claim 8
Dependent Claim
20 words
Method according to claim 6 wherein said polymeric material is selected from the group consisting of polyolefins, polyesters and polyvinylchloride.
Claim 9
Dependent Claim
11 words
Method according to claim 6 wherein said polymeric material is polypropylene.
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) | 1979-02-23 | 1979-08-25 | 1980-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-23 | 1983-08-25 | 1984-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-23 | 1987-08-25 | 1988-02-24 | $7700.00 | Window Closed / Lapsed |