Patent US4294745A successfully refreshed from Google Patents.
US4294745A
Expired / Lapsed
US
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Curable mixture for producing reinforced elastomeric plastics based on epoxide resin
Assignee: BASF Corp
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Filing: 1980-01-04
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Granted: 1981-10-13
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Expires: 2000-01-04
Abstract
Abstract The mixture contains as reinforcing agent needle-shaped crystals insoluble in epoxide resin, the crystals being for example of aluminium oxide or hydroxide and acetic acid, propionic acid, benzoic acid, adipic acid or sebacic acid. These crystals improve specific mechanical properties of the elastomeric polymers obtained by curing the epoxide resin/curing agent mixture, without the elastomeric properties being lost.
Inventors
- 👤 Rolf Schmid
- 👤 Friedrich Lohse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/09; C08K5/098; C07; C07C; C07C53/00; C07C53/08; C07C53/10; C07C53/122; C07C55/00; C07C55/02; C07C55/14; C07C55/20; C07C63/00; C07C63/04; C07C63/06; C07C63/08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/40; C08L; C08L63/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
179 words
A curable mixture containing (1) an epoxide resin, and (2) a curing agent for epoxide resins, wherein (a) at least one of the components (1) and (2) is at least trivalent, (b) the components (1) and (2) together consist to the extent of at least 60 percent by weight of aliphatic chain segments, (c) the number of atoms in the chains of components (1) and (2) between two active groups is 25 to 700, a phenylene group being reckoned to have 4 atoms, and (d) the components (1) and/or (2) contain aliphatic chain segments in the form of polyester or polyether groups, or hydrocarbon radicals unsubstituted or substituted in the side chain; the curable mixture also containing (2) an amount of 1 to 20 percent by weight, relative to the total amount of components (1) to (2), of needle-shaped to rod-shaped crystals which are insoluble in epoxide resin, and which have a length of 0.1 to 600 μm, a thickness of 0.01 to 60 μm, a length/thickness ratio of 3 to 200, and a density of 1.3 to 3.0.
Claim 2
Dependent Claim
179 words
A curable mixture containing (1) an epoxide resin, and (2) a curing agent for epoxide resins, wherein (a) at least one of the components (1) and (2) is at least trivalent, (b) the components (1) and (2) together consist to the extent of at least 60 percent by weight of aliphatic chain segments, (c) the number of atoms in the chains of components (1) and (2) between two active groups is 25 to 700, a phenylene group being reckoned to have 4 atoms, and (d) the components (1) and/or (2) contain aliphatic chain segments in the form of polyester or polyether groups, or hydrocarbon radicals unsubstituted or substituted in the side chain; the curable mixture also containing (2) an amount of 1 to 20 percent by weight, relative to the total amount of components (1) to (2), of needle-shaped to rod-shaped crystals which are insoluble in epoxide resin, and which have a length of 0.1 to 600 μm, a thickness of 0.01 to 60 μm, a length/thickness ratio of 3 to 200, and a density of 1.3 to 3.0.
Claim 3
Dependent Claim
94 words
A curable mixture according to claim 1, which contains as component (3) anhydrous, needle-shaped aluminium monohydroxycarboxylic acid salts which are obtained by reaction of neutral or basic aluminium oxide or aluminium hydroxide with acetic acid, propionic acid, benzoic acid, a dicarboxylic acid of the formula HO 2 C--C n H 2n --CO 2 H, wherein n is a number from 3 to 10 inclusive, or with the anhydrides of carboxylic acids, which salts are 0.1 to 200 μm long and 0.01 to 10 μm thick, and have a length/thickness ratio of 5:1 to 50:1.
Claim 4
Dependent Claim
18 words
A mixture according to claim 2 wherein the length/thickness ratio of the aluminum salts is 10:1 to 20:1.
Claim 5
Dependent Claim
32 words
A curable mixture according to claim 1, wherein at least one of the components (1) and (2) consists to the extent of at least 90 percent by weight of aliphatic chain segments.
Claim 6
Dependent Claim
26 words
A curable mixture according to claim 1, wherein the number of atoms in the chains of the components (1) and (2) together is 80 to 350.
Claim 7
Dependent Claim
20 words
A curable mixture according to claim 1, which mixture contains 5 to 12 percent by weight of the needle-shaped crystals.
Claim 8
Dependent Claim
19 words
A curable mixture according to claim 1, which mixture contains as component (1) a compound having three epoxide groups.
Claim 9
Dependent Claim
15 words
A curable mixture according to claim 1, which mixture contains as component (1) triglycidyl isocyanurate.
Claim 10
Dependent Claim
23 words
A curable mixture according to claim 1, which mixture contains as component (2) a linear acid polyester or polyether having terminal carboxyl groups.
Claim 11
Dependent Claim
20 words
A curable mixture according to claim 1, which mixture contains as component (2) an acid adipic acid neopentyl glycol polyester.
Claim 12
Dependent Claim
52 words
A curable mixture according to claim 1, which mixture contains as component (1) a linear polyether or polyester having terminal glycidyl groups bound ether-like or ester-like, the molecular weight being between 1600 and 6000, and as component (2) a polyamine having at least 3 amine hydrogen atoms active in the curing process.
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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) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |