US3854982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing hydrophilic polymer grafts including irradiation
Assignee: Hydroplastics Inc
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Filing: 1972-05-12
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Granted: 1974-12-17
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Expires: 1992-05-12
Abstract
Abstract Hydrophilic polymers are formed in situ by irradiating a mixture of hydroxyalkyl methacrylate and a cross linking agent. The former polymer is optically clear and free of voids, obviating the discoloration and discontinuity deficiencies characterizing prior art polymerization employing foreign substances such as solvents, dispersing agents, catalysts and the like. In accordance with one aspect of the present invention, the hydrophilic polymer may be formed as a coating on a glass, plastic or other substrate.
Inventors
- 👤 R Aelion
- 👤 E Ferezy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:35
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/12; C08J7/16; C08J7/18; B; B29; B29D; B29D11/00; B29D11/00865; C03; C03C; C03C17/00; C03C17/28; C03C17/32; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/20; Y; Y10; Y10S; Y10S522/00; Y10S522/911; Y10S522/912
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
68 words
A PROCESS FOR FORMING A HYDROPHILLIC POLYMERIC SURFACE ON A SUBSTRATE COMPRISING COATING A FIRST SURFACE OF SAID SUBSTRATES WITH A FIRST MONOMER SYSTEM COMPRISING A HYDROXYALKYL METHACRYLATE AND A CROSSLINKING AGENT, COATING A SECOND SURFACE OF SAID SUBSTRTE WITH A SECOND MONOMER SYSTEM THEN IRRADIATING SAID COATED SUBSTRATE WITH HIGH ENERGY RADIATION WHEREBY SAID FIRST MONOMER SYSTEM IS GRAFTED ONTO SAID SUBSTRATE AND FORMS A HYDROPHILIC SURFACE.
Claim 2
Dependent Claim
68 words
A PROCESS FOR FORMING A HYDROPHILLIC POLYMERIC SURFACE ON A SUBSTRATE COMPRISING COATING A FIRST SURFACE OF SAID SUBSTRATES WITH A FIRST MONOMER SYSTEM COMPRISING A HYDROXYALKYL METHACRYLATE AND A CROSSLINKING AGENT, COATING A SECOND SURFACE OF SAID SUBSTRTE WITH A SECOND MONOMER SYSTEM THEN IRRADIATING SAID COATED SUBSTRATE WITH HIGH ENERGY RADIATION WHEREBY SAID FIRST MONOMER SYSTEM IS GRAFTED ONTO SAID SUBSTRATE AND FORMS A HYDROPHILIC SURFACE.
Claim 3
Dependent Claim
17 words
A process as in claim 1 wherein said second monomer system comprises diethylene glycol bis allyl dicarbonate.
Claim 4
Dependent Claim
19 words
A process as in claim 1, wherein said second monomer system further comprises allyl acrylate as a cross-linking agent.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |