US5610243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polysulfide-epoxy thermoplastic elastomers
Assignee: Morton International LLC
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Filing: 1995-10-13
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Granted: 1997-03-11
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Expires: 2015-10-13
Abstract
Abstract A thermoplastic elastomer is made by the reaction of an epoxy resin with a liquid mercapto-terminated polysulfide wherein the ratio of epoxy equivalents in the epoxy resin to mercapto equivalents is from about 0.6 to about 0.98, with the proviso that when the ratio is greater than about 0.95:1, the polysulfide is further reacted with an amount of a mono-epoxy compound sufficient to raise the ratio of total epoxy equivalents to mercapto equivalents to a maximum of 1:1. An elastomer having residual --SH groups is air-curable. The elastomer is useful as a hot melt sealant for insulated window units.
Inventors
- 👤 David E. Vietti
- 👤 Keith B. Potts
- 👤 Kimberley A. Leone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:02
CPC Classifications
C; C08; C08L; C08L81/00; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/66; C08L63/00; C08L53/00; C08L53/02
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
141 words
A thermoplastic elastomer comprising an adduct of a liquid polysulfide having a general structure described by the formula HSCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S[SCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S].sub.m [--SCH.sub.2 CH(SH)CH.sub.2 S--].sub.n SCH.sub.2 CH.sub.2 OCH.sub.2 O--CH.sub.2 CH.sub.2 SH wherein m is from about 5 to about 50, n is from 0 to about 1 and n/m is from about 0.005 to about 0.02 when n is greater than 0 and a solid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.6:1 to about 0.7:1, or a liquid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.7:1 to about 0.95:1 and, optionally, an amount of a monofunctional epoxy compound sufficient to raise the ratio of total epoxy equivalents to mercapto equivalents from 0.95:1 to a maximum of 1:1.
Claim 2
Dependent Claim
141 words
A thermoplastic elastomer comprising an adduct of a liquid polysulfide having a general structure described by the formula HSCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S[SCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S].sub.m [--SCH.sub.2 CH(SH)CH.sub.2 S--].sub.n SCH.sub.2 CH.sub.2 OCH.sub.2 O--CH.sub.2 CH.sub.2 SH wherein m is from about 5 to about 50, n is from 0 to about 1 and n/m is from about 0.005 to about 0.02 when n is greater than 0 and a solid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.6:1 to about 0.7:1, or a liquid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.7:1 to about 0.95:1 and, optionally, an amount of a monofunctional epoxy compound sufficient to raise the ratio of total epoxy equivalents to mercapto equivalents from 0.95:1 to a maximum of 1:1.
Claim 3
Dependent Claim
22 words
The elastomer of claim 1 wherein the epoxy resin is a liquid and the ratio is from about 0.7:1 to about 0.85:1.
Claim 4
Dependent Claim
11 words
The elastomer of claim 1 wherein the epoxy resin is solid.
Claim 5
Dependent Claim
11 words
The elastomer of claim 2 wherein the epoxy resin is aromatic.
Claim 6
Dependent Claim
121 words
An air-curable hot melt sealant comprising a thermoplastic elastomer which is an adduct of an uncured mercapto-terminated polysulfide having a general structure described by the formula HSCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S[SCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S].sub.m [--SCH.sub.2 CH(SH)CH.sub.2 S--].sub.n SCH.sub.2 CH.sub.2 OCH.sub.2 O--CH.sub.2 CH.sub.2 SH wherein m is from about 5 to about 50, n is from 0 to about 1 and n/m is from about 0.005 to about 0.02 when n is greater than 0, and a solid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.6:1 to about 0.7:1, or a liquid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.7:1 to about 0.95:1.
Claim 7
Dependent Claim
121 words
An air-curable hot melt sealant comprising a thermoplastic elastomer which is an adduct of an uncured mercapto-terminated polysulfide having a general structure described by the formula HSCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S[SCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S].sub.m [--SCH.sub.2 CH(SH)CH.sub.2 S--].sub.n SCH.sub.2 CH.sub.2 OCH.sub.2 O--CH.sub.2 CH.sub.2 SH wherein m is from about 5 to about 50, n is from 0 to about 1 and n/m is from about 0.005 to about 0.02 when n is greater than 0, and a solid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.6:1 to about 0.7:1, or a liquid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.7:1 to about 0.95:1.
Claim 8
Dependent Claim
11 words
The sealant of claim 5 wherein the polysulfide is a liquid.
Claim 9
Dependent Claim
11 words
The sealant of claim 5 wherein the epoxy resin is solid.
Claim 10
Independent Claim
170 words
A method for preparing a thermoplastic elastomer, said method comprising heating a mixture of a liquid polysulfide having a general structure described by the formula HSCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S[SCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S].sub.m [--SCH.sub.2 CH(SH)CH.sub.2 S--].sub.n SCH.sub.2 CH.sub.2 OCH.sub.2 O--CH.sub.2 CH.sub.2 SH wherein m is from about 5 to about 50, n is from 0 to about 1 and n/m is from about 0.005 to about 0.02 when n is greater than 0, a tertiary amine in an amount of from about 0.1 to about 1.0% of the total weight of the mixture, a solid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.6:1 to about 0.7:1, or a liquid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.7:1 to about 0.95:1; and, optionally, adding an amount of a monofunctional epoxy compound sufficient to raise the ratio of total epoxy equivalents to mercapto equivalents from 0.95:1 to a maximum of 1:1 before heating.
Claim 11
Independent Claim
170 words
A method for preparing a thermoplastic elastomer, said method comprising heating a mixture of a liquid polysulfide having a general structure described by the formula HSCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S[SCH.sub.2 CH.sub.2 OCH.sub.2 OCH.sub.2 CH.sub.2 S].sub.m [--SCH.sub.2 CH(SH)CH.sub.2 S--].sub.n SCH.sub.2 CH.sub.2 OCH.sub.2 O--CH.sub.2 CH.sub.2 SH wherein m is from about 5 to about 50, n is from 0 to about 1 and n/m is from about 0.005 to about 0.02 when n is greater than 0, a tertiary amine in an amount of from about 0.1 to about 1.0% of the total weight of the mixture, a solid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.6:1 to about 0.7:1, or a liquid epoxy resin in which the ratio of epoxy equivalents to mercapto equivalents is from about 0.7:1 to about 0.95:1; and, optionally, adding an amount of a monofunctional epoxy compound sufficient to raise the ratio of total epoxy equivalents to mercapto equivalents from 0.95:1 to a maximum of 1:1 before heating.
Claim 12
Dependent Claim
15 words
The elastomer of claim 2 wherein the ratio is from about 0.7:1 to about 0.8:1.
Claim 13
Dependent Claim
22 words
The sealant of claim 5 wherein the epoxy resin is a liquid and the ratio is from about 0.7:1 to about 0.85:1.
Claim 14
Dependent Claim
15 words
The sealant of claim 10 wherein the ratio is from about 0.7:1 to about 0.8:1.
Claim 15
Dependent Claim
22 words
The method of claim 8 wherein the epoxy resin is a liquid and the ratio is from about 0.7:1 to about 0.85:1.
Claim 16
Dependent Claim
15 words
The method of claim 12 wherein the ratio is from about 0.7:1 to about 0.8:1.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2000-03-10 | 2000-09-09 | 2001-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-03-10 | 2004-09-09 | 2005-03-11 | $3760.00 | Window Closed / Lapsed |
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