US4983692A
Expired / Lapsed
US
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Sulfide containing aliphatic epoxy resins
Assignee: Dow Chemical Co
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Filing: 1989-12-12
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Granted: 1991-01-08
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Expires: 2009-12-12
Abstract
Abstract Novel epoxy resins are prepared by dehydrohalogenating the reaction product of an epihalohydrin and a hydroxyalkyl containing polysulfide.
Inventors
- 👤 Robert E. Hefner, Jr.
- 👤 Paul L. Wykowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:25
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/3254; C08G59/02; C08G59/04; C08G59/22; C08G59/30; C08G59/302
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
An epoxy resin composition resulting from dehydrohalogenating the reaction product of one or more polysulfides with an epihalohydrin which polysulfides are represented by the following formulas I or II or a combination of such polysulfides ##STR19## wherein each R is independently a polyvalent organic radical with each valence residing on a carbon atom and having from one to about 18 carbon atoms: each Z is independently a hydroxyalkyl or inertly substituted hydroxyalkyl monovalent radical having from 1 to about 36 carbon atoms; p and m are independently zero or a positive integer having a value from 1 to about 40; p" and m 1 are independently a positive integer having a value from 1 to about 40; n is a number from 1 to about 8 and p' is zero or a positive integer which is the difference between the valence of R and two.
Claim 2
Dependent Claim
145 words
An epoxy resin composition resulting from dehydrohalogenating the reaction product of one or more polysulfides with an epihalohydrin which polysulfides are represented by the following formulas I or II or a combination of such polysulfides ##STR19## wherein each R is independently a polyvalent organic radical with each valence residing on a carbon atom and having from one to about 18 carbon atoms: each Z is independently a hydroxyalkyl or inertly substituted hydroxyalkyl monovalent radical having from 1 to about 36 carbon atoms; p and m are independently zero or a positive integer having a value from 1 to about 40; p" and m 1 are independently a positive integer having a value from 1 to about 40; n is a number from 1 to about 8 and p' is zero or a positive integer which is the difference between the valence of R and two.
Claim 3
Dependent Claim
74 words
An epoxy resin composition of claim 1 wherein each R independently has from about 2 to about 12 carbon atoms: each Z independently has from about 2 to about 12 carbon atoms: p and m are independently positive integers having a value of from 1 to about 12; p" and m 1 are independently positive integers having a value from 1 to about 12; and n is a number from 1 to about 4.
Claim 4
Dependent Claim
74 words
An epoxy resin composition of claim 2 wherein each R independently has from about 2 to about 6 carbon atoms; each Z independently has from about 2 to about 6 carbon atoms; p and m are independently positive integers having a value of from 1 to about 6; p" and m 1 are independently positive integers having a value from 1 to about 6; and n is a number from 1 to about 2.
Claim 5
Dependent Claim
115 words
An epoxy resin composition of claim 1 wherein the polysulfide is HO--((CH 2 CH 2 SCH 2 CH 2 O) b --(CH 2 CH 2 SCH 2 CH(CH 3 )O) d ) n --H where n has a value from about 4 to about 6, HO--((CH 2 CH 2 SCH 2 CH 2 )O) b --OCH 2 CHOHCH 2 O--(CH 2 CH 2 SCH 2 CH(CH 3 )O) d ) n--H where n has a value from about 8 to about 10, HOCH 2 CH 2 SSCH 2 CH 2 SSCH 2 CH 2 H, thiodiglycol, 2-hydroxyethyldisulfide, or a combination and b and d are integers such that b/(b+d) has a value of 0.7 thereof.
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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) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |