US4131716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acrylic acid esters of polythiodialkanols and related compounds
Assignee: ATK Launch Systems LLC
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Filing: 1977-04-28
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Granted: 1978-12-26
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Expires: 1997-04-28
Abstract
Abstract Diacrylate esters of dithiodiglycol and of polyether and polyformal oligomers thereof, their preparation, and use in combination with other radiation curable prepolymers for preparation of radiation curable compositions are disclosed.
Inventors
- 👤 Eugene R. Bertozzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:27
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/372; C07; C07C; C07C323/00; C08F; C08F299/00; C08F299/02; C08F299/06; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31576; Y10T428/31598; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A curable composition which comprises an acrylate terminated polyurethane prepolymer, a photosensitizer, and a compound of the formula ##STR3## wherein R is hydrogen or methyl, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are hydrogen, methyl or ethyl, or each independently is hydrogen, methyl, ethyl, or chloromethyl, x is from about 2 to about 4, y is 0 or an integer of from 1 to 3, and z is 0 or is sufficient to make a molecular weight of about 4000.
Claim 2
Dependent Claim
96 words
A curable composition which comprises an acrylate terminated polyurethane prepolymer, a photosensitizer, and a compound of the formula ##STR3## wherein R is hydrogen or methyl, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are hydrogen, methyl or ethyl, or each independently is hydrogen, methyl, ethyl, or chloromethyl, x is from about 2 to about 4, y is 0 or an integer of from 1 to 3, and z is 0 or is sufficient to make a molecular weight of about 4000.
Claim 3
Dependent Claim
43 words
A process for the preparation of a UV curable composition based on an acrylate terminated polyurethane prepolymer, having improved extensibility and flexibility which comprises blending: (a) an acrylate terminated polyurethane prepolymer; (b) a photosensitizer; and (c) a compound as defined in claim 1.
Claim 4
Dependent Claim
43 words
An article of manufacture which comprises a substrate coated on at least one surface with a coating comprising the actinic radiation induced reaction products of (a) an acrylate terminated polyurethane prepolymer; (b) a photosensitizer; and (c) a compound as defined in claim 1.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-25 | 1982-06-26 | 1982-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-25 | 1986-06-26 | 1986-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-25 | 1990-06-26 | 1990-12-26 | $7700.00 | Window Closed / Lapsed |