Patent US4590146A successfully refreshed from Google Patents.
US4590146A
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Stabilization of photopolymerizable mixtures
Assignee: BASF SE
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Filing: 1984-07-06
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Granted: 1986-05-20
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Expires: 2004-07-06
Abstract
Abstract Photopolymerizable water-soluble or water-dispersible mixtures essentially consisting of a base polymer, at least one polymerizable ethylenically unsaturated compound and at least one photoinitiator and/or photosensitizer are stabilized to thermal polymerization by treating the base polymer with a halogen, a pseudohalogen or a polyhalide.
Inventors
- 👤 Guenter Wallbillich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/114; Y10S430/118; Y10S430/126
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
In a process for stabilizing a photopolymerizable mixture consisting essentially of a polymer selected from the group consisting of vinyl alcohol polymers containing --CH 2 CH(OH) structural units in the main chain, their water-soluble or water-dispersible copolymers and derivatives, cellulose derivatives, gelatin and vinyl pyrrolidone polymers, at least one polymerizable ethylenically unsaturated compound and at least one compound selected from the group consisting of photoinitiators and photosensitizers to thermal polymerization, the improvement which comprises: pretreating the polymer, prior to preparing said mixture, with a compound selected from the group consisting of halogens, psuedohalogens and polyhalides in the presence of water at from 20° to 100° C. in the course of from half an hour to several days.
Claim 2
Dependent Claim
117 words
In a process for stabilizing a photopolymerizable mixture consisting essentially of a polymer selected from the group consisting of vinyl alcohol polymers containing --CH 2 CH(OH) structural units in the main chain, their water-soluble or water-dispersible copolymers and derivatives, cellulose derivatives, gelatin and vinyl pyrrolidone polymers, at least one polymerizable ethylenically unsaturated compound and at least one compound selected from the group consisting of photoinitiators and photosensitizers to thermal polymerization, the improvement which comprises: pretreating the polymer, prior to preparing said mixture, with a compound selected from the group consisting of halogens, psuedohalogens and polyhalides in the presence of water at from 20° to 100° C. in the course of from half an hour to several days.
Claim 3
Dependent Claim
36 words
The improved process of claim 1, wherein the pretreated polymer is a hydrolyzed polyvinyl acetate having a mean degree of polymerization of from 200 to 3,000 and a degree of hydrolysis of from 65 to 100.
Claim 4
Dependent Claim
36 words
The improved process of claim 1, wherein the pretreated polymer is a hydrolyzed polyvinyl acetate having a mean degree of polymerization of from 250 to 750 and a degree of hydrolysis of from 80 to 88.
Claim 5
Dependent Claim
19 words
The process of claim 1, wherein the polymer is pretreated for a period of from 3 to 24 hours.
References Cited (Backward Citations)
GB786119A
Cited
GB834337A
Cited
GB835849A
Cited
GB1233883A
Cited
GB1251475A
Cited
US3859098A
Cited
GB1416440A
Cited
US3953210A
Cited
US4304838A
Cited
US3895954A
Cited
US4049517A
Cited
US4033773A
Cited
US4058443A
Cited
US4279985A
Cited
US4297435A
Cited
US4341860A
Cited
US4448658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |