Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1992-01-21
1993-03-02
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 73, 528368, 528369, 528310, 528328, C08G 1808
Patent
active
051910543
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a process for the production of crosslinked polymers from cyclic iminoethers and to the new polymers themselves.
2. Statement of Related Art
It is known that crosslinked polymers can be produced from compounds containing a cyclic iminoether group several times in the molecule. Various properties have been attributed to the polymers, depending on the type of starting materials used. Thus, according to EP 273 368, DE 20 29 524 and DE 35 39 593, they may be used as plastics, resins and adhesive compounds. However, apart from the difficulties involved in their production, the often inadequate properties of the polymers were a disadvantage in most cases.
DESCRIPTION OF THE INVENTION
It has now been found that new crosslinked polymers can be produced from new cyclic polyiminoethers.
SUMMARY OF THE INVENTION
Accordingly, the present invention relates to a process for the production of crosslinked polymers from cyclic polyiminoethers, in which a polyiminoether corresponding to formula I is polymerized with heating in the presence of acidic catalysts. ##STR1## In formula I, A is an aliphatic, aromatic or araliphatic group containing 4 to 40 carbon atoms and n free valencies at various carbon atoms, x may assume a value of 0 to 40, n has a value of 2, 3 or 4, Z is either a direct bond or the group CR.sup.5 R.sup.6, the substituents R.sup.1 to R.sup.6 independently of one another represent H, alkyl or aryl containing up to 8 carbon atoms, the substituent R.sup.7 is hydrogen, methyl or ethyl and Q is a phenylene group, which may be substituted by one or two methyl groups, or the group --CHR--M--, in which R is selected from the group consisting of H, alkyl or alkenyl and M is selected from the group consisting of alkylene, alkenylene, arylene and alkarylene and the parts R and M of the molecule independently of one another contain 0 to 12 carbon atoms and may additionally be substituted by an alkoxy group containing 1 to 3 carbon atoms.
In addition to this polyiminoether (component a) and the catalyst (component c), cyclic monoiminoethers and/or lactones (component b) and typical fillers and additives (component d) may also be present during the reaction.
The present invention also relates to the crosslinked polymers obtainable by this process.
The new process enables new polymers having extremely positive properties, more particularly mechanical and electrical properties, to be obtained from readily available starting materials. Above all, the possibility of selection in the case of components a and b also enables the properties to be adapted to specific requirements. Accordingly, the new polymers are suitable for various applications, of which their use as more or less hard materials, as films, as casting compounds and as heat-curing adhesives are mentioned purely by way of example.
DESCRIPTION OF PREFERRED EMBODIMENTS
Components a to d used in the process according to the invention are described in more detail in the following.
Component a
The cyclic polyiminoethers are compounds which may be obtained in accordance with earlier patent application PCT/EP90/00733 by addition of cyclic monoiminoethers containing hydroxyl groups onto polyisocyanates. Accordingly, the disclosure of this application is included in the subject matter of the present application. Starting materials for the production of the cyclic polyiminoethers corresponding to formula I are polyisocyanates corresponding to formula II ##STR2## in which A, n, x, Z, R.sup.1 to R.sup.7 and Q are as defined above. The addition reaction is preferably carried out with stoichiometric quantities of the starting materials at elevated temperature.
Cyclic polyiminoethers corresponding to formula Ia ##STR3## which are prepared from polyisocyanates (II) and n moles of iminoethers corresponding to formula IIIa ##STR4## are preferred for the purposes of the present invention. In these formulae, R and M are again as defined above.
Polyiminoethers in which at least 4 of the substi
REFERENCES:
patent: 4839446 (1989-06-01), Culbertson et al.
Henkel Kommanditgesellschaft auf Aktien
Jaeschke Wayne C.
Szoke Ernest G.
Welsh Maurice J.
Wisdom, Jr. Norvell E.
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