US4220731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of crosslinked high polymers
Assignee: BASF Corp
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Filing: 1978-06-07
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Granted: 1980-09-02
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Expires: 1998-06-07
Abstract
Abstract The invention relates to a process for the preparation of crosslinked polymers by reacting liquid epoxide compounds and polyisocyanates and, if desired, polyhydroxy compounds. The curing catalysts used are complex compounds of BF 3 with ethers or phosphonium compounds or H 2 O. If desired, a compound of one of the metals Sn, Zn or Fe which is soluble in the reaction mixture is also added. In most cases it is possible to dispense completely with the external supply of heat when carrying out the process according to the invention, since the reaction is sufficiently exothermic. The technical advance lies in the fact that it is largely possible to dispense with heating and insulating equipment when carrying out the reaction industrially. Despite this, astonishingly high glass transition temperatures are obtained.
Inventors
- 👤 Paul Zuppinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:14
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/58; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C08G59/68; C08G59/72; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/0058; C08G2110/0066
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
A process for the preparation of a crosslinked polymer which comprises reacting (a) a liquid epoxide compound containing at least two epoxide groups in the molecule, with (b) a polyisocyanate in such amounts that there are present 0.1 to 2.0 isocyanate groups per epoxide group; in the presence of 0.2 to 0.5% by weight of (a) plus (b) of a curing catalyst which is a complex compound of BF 3 with a member selected from the group consisting of tetrahydropyran and tetrahydrofuran and in the presence of (d) 0.0001 to 0.5% by weight of (a) plus (b) of a curing accelerator which is a compound of a metal selected from the group consisting of Sn, Zn and Fe, which is soluble in (a) and (b), at a temperature between room temperature and 250° C. wherein said process is conducted without the addition of external heat.
Claim 2
Dependent Claim
145 words
A process for the preparation of a crosslinked polymer which comprises reacting (a) a liquid epoxide compound containing at least two epoxide groups in the molecule, with (b) a polyisocyanate in such amounts that there are present 0.1 to 2.0 isocyanate groups per epoxide group; in the presence of 0.2 to 0.5% by weight of (a) plus (b) of a curing catalyst which is a complex compound of BF 3 with a member selected from the group consisting of tetrahydropyran and tetrahydrofuran and in the presence of (d) 0.0001 to 0.5% by weight of (a) plus (b) of a curing accelerator which is a compound of a metal selected from the group consisting of Sn, Zn and Fe, which is soluble in (a) and (b), at a temperature between room temperature and 250° C. wherein said process is conducted without the addition of external heat.
Claim 3
Dependent Claim
46 words
A process according to claim 1 which additionally contains (c) a polyhydroxy compound in such amounts that there are present 0.1 to 2.0 hydroxy groups per epoxide group and the amount of curing catalyst is 0.2 to 0.5% by weight of (a) plus (b) plus (c).
Claim 4
Dependent Claim
16 words
A process according to claim 1, which additionally contains a blowing agent for forming a foam.
Claim 5
Dependent Claim
26 words
A process according to claim 1, wherein the polyisocyanate is in such an amount so that there are 0.3 to 1.2 isocyanate groups per epoxide group.
Claim 6
Dependent Claim
23 words
A process according to claim 1 wherein (d) the compound of the metal is 0.0002 to 0.3% by weight of (a) plus (b).
Claim 7
Dependent Claim
45 words
A process according to claim 2 which additionally contains (d) 0.0001 to 0.5% by weight of (a) plus (b) plus (c) of a compound of a metal selected from the group consisting of Sn, Zn and Fe which is soluble in (a), (b) and (c).
Claim 8
Dependent Claim
28 words
A process according to claim 2 wherein the polyhydroxy compound is in such an amount so that there are present 0.2 to 1.0 hydroxy groups per epoxide group.
Claim 9
Dependent Claim
25 words
A process according to claim 6 wherein (d) the compound of the metal is 0.0002 to 0.3% by weight of (a) plus (b) plus (c).
Claim 10
Dependent Claim
22 words
A process according to claims 1, 2, or 6 wherein the curing catalyst is the complex compound of BF 3 with tetrahydrofuran.
Claim 11
Dependent Claim
22 words
A process according to claims 1, 2, or 6 wherein the curing catalyst is the complex compound of BF 3 with tetrahydropyran.
Claim 12
Dependent Claim
16 words
A process according to claim 6 wherein (d) the compound of the metal is dibutyl-tin dilaurate.
Claim 13
Dependent Claim
13 words
A crosslinked polymer prepared by the process of claims 1, 2, or 6.
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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) | 1983-09-02 | 1984-03-03 | 1984-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-02 | 1988-03-03 | 1988-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-02 | 1992-03-03 | 1992-09-02 | $7700.00 | Window Closed / Lapsed |