US4855367A
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Orthocarbonates
Assignee: BASF Corp
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Filing: 1988-06-07
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Granted: 1989-08-08
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Expires: 2008-06-07
Abstract
Abstract Orthocarbonates of the formula I <IMAGE> (I) in which R is C1-C4alkyl, x is zero, 1 or 2, and A is a trivalent radical derived from an aliphatic triol by omitting the hydroxyl groups, the hydroxyl groups of the triol being bonded to different carbon atoms, are suitable as cocomponents in the curing of epoxy resins in that they limit the reduction in volume occurring during curing of epoxy resins. In addition, the cured resins are distinguished by increased flexural strength and impact strength.
Inventors
- 👤 Peter Flury
- 👤 Sameer H. Eldin
- 👤 Martin Roth
- 👤 Claus W. Rabener
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:33
CPC Classifications
C; C07; C07D; C07D493/00; C07D493/22; C07D519/00; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/156
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
51 words
An orthocarbonate of the formula I ##STR11## in which R is C 1 -C 4 alkyl, x is zero, 1 or 2, and A is a trivalent radical derived from an aliphatic triol through omission of the hydroxyl groups, the hydroxyl groups of the triol being bonded to different carbon atoms.
Claim 2
Dependent Claim
51 words
An orthocarbonate of the formula I ##STR11## in which R is C 1 -C 4 alkyl, x is zero, 1 or 2, and A is a trivalent radical derived from an aliphatic triol through omission of the hydroxyl groups, the hydroxyl groups of the triol being bonded to different carbon atoms.
Claim 3
Dependent Claim
15 words
An orthocarbonate of the formula I according to claim 1, in which x is 1.
Claim 4
Dependent Claim
14 words
An orthocarbonate of formula I according to claim 1, in which x is zero.
Claim 5
Dependent Claim
22 words
An orthocarbonate of the formula I according to claim 1, in which A is derived from a 1,2,3-, 1,2,4- or a 1,3,5-triol.
Claim 6
Dependent Claim
22 words
An orthocarbonate of the formula I according to claim 1, in which A is a radical containing 3 to 24 carbon atoms.
Claim 7
Dependent Claim
42 words
An orthocarbonate of the formula I according to claim 1, in which A is a radical of the formula II ##STR12## where the substituents R 1 , independently of one another, are a C 1 -C 4 alkyl group or, preferably, hydrogen.
Claim 8
Dependent Claim
24 words
An orthocarbonate of the formula I according to claim 1, in which A is a radical of the formula III, IIIa or IIIb ##STR13##
Claim 9
Dependent Claim
13 words
An orthocarbonate according to claim 1 of the formulae IV to XI ##STR14##
Claim 10
Dependent Claim
56 words
A process for the preparation of an orthocarbonate of the formula I according to claim 1 by reacting three moles of a 2,2-dichloro-1,3-benzodioxole of the formula ##STR15## with two moles of a triol of the formula A(OH) 3 in the presence of a base, the symbols R, x and A being as defined in claim 1.
Claim 11
Dependent Claim
36 words
A curable mixture of substances containing (a) an orthocarbonate of the formula I according to claim 1, (b) an epoxy resin and (c) a curing agent and, if desired, a curing catalyst for the epoxy resin.
Claim 12
Dependent Claim
33 words
A mixture of substances according to claim 10, in which the amount of the orthocarbonate (a) is 5 to 50 parts by weight per 100 parts by weight of the epoxy resin (b).
Claim 13
Dependent Claim
22 words
An orthocarbonate of the formula I according to claim 1, prepared by reacting 3 moles of 2,2-dichloro-1,3-benzodioxole with 2 moles of glycerol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |