Patent US5332781A successfully refreshed from Google Patents.
US5332781A
Expired / Lapsed
US
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Storage-stable suspension of tougheners in epoxy resin hardeners
Assignee: Huntsman Advanced Materials Americas LLC
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Filing: 1993-06-22
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Granted: 1994-07-26
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Expires: 2013-06-22
Abstract
Abstract Storage-stable suspension comprised of a solid or liquid epoxy resin hardener and a solid or liquid toughener suspended therein is distinguished by excellent homogeneous dispersion of the toughener in the epoxy resin hardener and are suitable for preparing suspensions of curable epoxy resin compositions.
Inventors
- 👤 Sameer H. Eldin
- 👤 Robert P. Peyer
- 👤 Frans Setiabudi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:24
CPC Classifications
C; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
A storage-stable suspension consisting of a solid or liquid epoxy resin hardener and homogeneously dispersed therein particles of a toughener which does not contain groups that react with the hardener wherein the suspension is subsequently mixed with an epoxy resin.
Claim 2
Dependent Claim
40 words
A storage-stable suspension consisting of a solid or liquid epoxy resin hardener and homogeneously dispersed therein particles of a toughener which does not contain groups that react with the hardener wherein the suspension is subsequently mixed with an epoxy resin.
Claim 3
Dependent Claim
13 words
A suspension according to claim 1, which comprises a liquid epoxy resin hardener.
Claim 4
Dependent Claim
18 words
A suspension according to claim 1, wherein the epoxy resin hardener is a polycarboxylic anhydride or a polyamine.
Claim 5
Dependent Claim
16 words
A suspension according to claim 3, which comprises a liquid polycarboxylic anhydride or a liquid polyamine.
Claim 6
Dependent Claim
14 words
A suspension according to claim 1, wherein the solid toughener is a graft polymer.
Claim 7
Dependent Claim
14 words
A suspension according to claim 1, wherein the solid toughener is a graft polymer.
Claim 8
Dependent Claim
14 words
A suspension according to claim 5, wherein the graft polymer is a core/shell polymer.
References Cited (Backward Citations)
CH415045A
Cited
US4082895A
Cited
EP0189048A2
Cited
WO1987000188A1
Cited
US4778851A
Cited
US4778851B1
Cited
US4841010A
Cited
US5075379A
Cited
US5177122A
Cited
EP0449776A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-25 | 1998-01-24 | 1998-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-25 | 2002-01-24 | 2002-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-25 | 2006-01-24 | 2006-07-26 | $7700.00 | Window Closed / Lapsed |