US4378278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer foams produced by electron beam radiation
Assignee: SC Johnson and Son Inc
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Filing: 1981-09-28
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Granted: 1983-03-29
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Expires: 2001-09-28
Abstract
Abstract A process for forming a polymeric foam comprising mixing a liquid multi-functional acrylate monomer and a liquid nonionic fluoronated alkyl-ester surfactant, foaming the surfactant monomer mixture and passing the foamed surfactant monomer mixture under a source of electron beam radiation to polymerize the monomer into a polymeric foam structure.
Inventors
- 👤 James R. Allaway
- 👤 Daniel R. Bloch
- 👤 Michael P. Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:19
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J9/30; C08J2333/00; C08J2333/04; C08J2471/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
128 words
A process for forming polymeric foams which comprises: (a) Mixing at least one liquid, multi-functional acrylate monomer and from 0.05 to 5% by weight of a liquid nonionic fluoronated alkyl-ester surfactant having the formula ##STR2## wherein R f is a fluoro alkyl group having from 3 to 12 carbon atoms, m is an integer from 2 to 12 and R is a low molecular weight polyoxyethylene, polyoxypropylene or polyoxyethylene polyoxypropylene copolymer group; (b) foaming the monomer surfactant mixture, and (c) irradiating the foamed monomer surfactant mixture with high energy ionizing radiation having an energy of at least about 150,000 electron volts at a dose rate no greater than 100 megarads per second to provide a dosage of from 0.75 to 15 megarads to form a polymeric foam material.
Claim 2
Dependent Claim
128 words
A process for forming polymeric foams which comprises: (a) Mixing at least one liquid, multi-functional acrylate monomer and from 0.05 to 5% by weight of a liquid nonionic fluoronated alkyl-ester surfactant having the formula ##STR2## wherein R f is a fluoro alkyl group having from 3 to 12 carbon atoms, m is an integer from 2 to 12 and R is a low molecular weight polyoxyethylene, polyoxypropylene or polyoxyethylene polyoxypropylene copolymer group; (b) foaming the monomer surfactant mixture, and (c) irradiating the foamed monomer surfactant mixture with high energy ionizing radiation having an energy of at least about 150,000 electron volts at a dose rate no greater than 100 megarads per second to provide a dosage of from 0.75 to 15 megarads to form a polymeric foam material.
Claim 3
Dependent Claim
42 words
The process of claim 1, wherein said liquid, multi-functional acrylate is selected from the group consisting essentially of tripropylene glycol diacrylate, neopentyl glycol diacrylate, trimethylol propane triacrylate, trimethylol propane ethoxy triacrylate, tetraethylene glycol diacrylate, 1,6 hexanediol diacrylate, pentaerythritol triacrylate and mixtures thereof.
References Cited (Backward Citations)
US3393161A
Cited
US4199421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-28 | 1986-09-27 | 1987-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-28 | 1990-09-27 | 1991-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-28 | 1994-09-27 | 1995-03-29 | $7700.00 | Window Closed / Lapsed |