US3904499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid curable compositions containing liquid polyenes and solid styrene-allyl alcohol copolymer based polythiols
Assignee: WR Grace and Co
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Filing: 1974-02-25
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Granted: 1975-09-09
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Expires: 1994-02-25
Abstract
Abstract Novel solid polythiols are mercaptoester derivatives of styreneallyl alcohol copolymers. These solid polythiols are readily prepared by esterifying a styrene-allyl alcohol copolymer with a mercaptocarboxylic acid, e.g., Beta -mercaptopropionic acid. The solid styrene-allyl alcohol based polythiols may be admixed with liquid polyenes thereby forming solid polyene-polythiol polymeric systems which are curable, particularly photocurable, in the solid state. Upon exposing the solid, curable polyene-polythiol compositions to a free radical generator, e.g., UV light, solid cross-linked and chemically resistant polythioether products are formed which are particularly useful as coatings, photoresists, printing plates, etc.
Inventors
- 👤 Charles R Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:52
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/0275; C; C08; C08F; C08F8/00; C08F8/14; C08G; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12; C08L; C08L81/00; C08L81/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
26 words
A LIQUID POLYENE CONTAINING AT LEAST 2 REACTIVE UNSATURATED CARBON TO CARBON BONDS AND HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 50 TO 20,000,
Claim 2
Dependent Claim
26 words
A LIQUID POLYENE CONTAINING AT LEAST 2 REACTIVE UNSATURATED CARBON TO CARBON BONDS AND HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 50 TO 20,000,
Claim 3
Dependent Claim
14 words
A SOLID CURABLE COMPOSITION USEFUL FOR OBTAINING A SOLID CROSS-LINKED POLYTHIOETHER CONSISTING ESSENTIALLY OF:
Claim 4
Dependent Claim
14 words
A SOLID CURABLE COMPOSITION USEFUL FOR OBTAINING A SOLID CROSS-LINKED POLYTHIOETHER CONSISTING ESSENTIALLY OF:
Claim 5
Dependent Claim
15 words
A SOLID POLYTHIOL CONTAINING AT LEAST 2 THIOL GROUPS PER MOLECULE OF THE GENERAL FORMULA:
Claim 6
Dependent Claim
15 words
A SOLID POLYTHIOL CONTAINING AT LEAST 2 THIOL GROUPS PER MOLECULE OF THE GENERAL FORMULA:
Claim 7
Dependent Claim
55 words
A composition of claim 1 wherein the R3 radical in said polythiol is selected from the group consisting of -CH2-, -CHCH3, and -CH2-CH2- and mixtures thereof; and said styrene-allyl alcohol copolymer having an equivalent weight of about 300 + or - 130 and a hydroxyl group content from about 4 to 10 percent by weight.
Claim 8
Dependent Claim
15 words
a solid polythiol containing at least 2 thiol groups per molecule of the general formula:
Claim 9
Dependent Claim
15 words
a solid polythiol containing at least 2 thiol groups per molecule of the general formula:
Claim 10
Dependent Claim
15 words
a solid polythiol containing at least 2 thiol groups per molecular of the general formula:
Claim 11
Dependent Claim
15 words
a solid polythiol containing at least 2 thiol groups per molecular of the general formula:
Claim 12
Dependent Claim
11 words
A process of forming a solid cross-linked polythioether which comprises admixing:
Claim 13
Dependent Claim
11 words
A process of forming a solid cross-linked polythioether which comprises admixing:
Claim 14
Dependent Claim
55 words
The process of claim 3 wherein the R3 radical in said polythiol is selected from the group consisting of -CH2-, -CHCH3, and -CH2-CH2- and mixtures thereof; and said styrene-ally alcohol copolymer having an equivalent weight of about 300 + or - 130 and a hydroxyl group content from about 4 to 10 percent by weight.
Claim 15
Dependent Claim
13 words
The process of claim 3 wherein the mixture is exposed to actinic radiation.
Claim 16
Dependent Claim
21 words
The process of claim 5 wherein the actinic radiation is ultraviolet light having a wavelength between about 2,000A and about 4,000*A.
Claim 17
Dependent Claim
33 words
The process of claim 5 wherein the composition contains from 0.005 to 50 parts by weight based on 100 parts by weight of said polyene and said polythiol of a photocuring rate accelerator.
Claim 18
Dependent Claim
13 words
The process of claim 3 wherein the mixture is exposed to ionizing radiation.
Claim 19
Dependent Claim
10 words
The solid product prepared by the process of claim 3.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |