US3920732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for stabilized ethylenically unsaturated beta-hydroxy esters
Assignee: Continental Can Co Inc
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Filing: 1974-05-24
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Granted: 1975-11-18
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Expires: 1994-05-24
Abstract
Abstract An ethylenically unsaturated beta-hydroxy ester stabilized to gel formation but which remains susceptible to polymerization by ionizing radiation is obtained by reacting a polyepoxide with an alpha, beta-ethylenically unsaturated carboxylic acid such as acrylic or methacrylic acid in the presence of a tin halide salt.
Inventors
- 👤 Sol B Radlove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:14
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/16; C07; C07C; C07C67/00; C07C67/24; C07C67/26; C07C67/48; C07C67/62; C08G; C08G59/00; C08G59/14; C08G59/1433; C08G59/1438; C08G59/1455; C08G59/1461; C08L; C08L63/00; C08L63/10; C09; C09D; C09D11/00; C09D11/02; C09D11/10; C09D11/101
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
83 words
IN THE METHOD OF PREPARING AN ETHYLENICALLY UNSATURATED BETA-HYDROXY ESTER SUSCEPTIBLE OF POLYMERIZATION BY ULTRAVIOLET RADIATION WHEREIN A MIXTURE OF A POLYEPOXIDE HAVING AT LEAST TWO EXPOXIDE GROUPS IN THE POLYEPOXIDE MOLECULES AND AN ALPHA, BETA-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID HAVING THREE TO SIX CARBON ATOMS IS REACTED IN THE PRESENCE OF AN ALKALINE CATALYST WHEREIN THE IMPROVEMENT COMPRISES INCORPORATING IN THE MIXTURE A SMALL BUT EFFECTIVE AMOUNT OF A TIN HALIDE SALT TO PREPARE THE BETA-HYDROXY ESTER WHICH IS STABLE TO PREMATURE GELATION.
Claim 2
Dependent Claim
83 words
IN THE METHOD OF PREPARING AN ETHYLENICALLY UNSATURATED BETA-HYDROXY ESTER SUSCEPTIBLE OF POLYMERIZATION BY ULTRAVIOLET RADIATION WHEREIN A MIXTURE OF A POLYEPOXIDE HAVING AT LEAST TWO EXPOXIDE GROUPS IN THE POLYEPOXIDE MOLECULES AND AN ALPHA, BETA-ETHYLENICALLY UNSATURATED CARBOXYLIC ACID HAVING THREE TO SIX CARBON ATOMS IS REACTED IN THE PRESENCE OF AN ALKALINE CATALYST WHEREIN THE IMPROVEMENT COMPRISES INCORPORATING IN THE MIXTURE A SMALL BUT EFFECTIVE AMOUNT OF A TIN HALIDE SALT TO PREPARE THE BETA-HYDROXY ESTER WHICH IS STABLE TO PREMATURE GELATION.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein the polyepoxide is the diglycidyl ether of Bisphenol A.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein the acid is acrylic acid.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein the tin halide salt is SnCl2.
Claim 6
Dependent Claim
12 words
The method of claim 1 wherein the catalyst is a tertiary amine.
Claim 7
Dependent Claim
14 words
The method of claim 5 wherein the tertiary amine is N,N'' benzyl dimethyl amine.
Claim 8
Dependent Claim
23 words
The method of claim 1 wherein the tin salt is present in the mixture at a concentration of 0.1% to 1.0% by weight.
References Cited (Backward Citations)
US3373075A
Cited
US3708524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |