Process for the preparation of crosslinked high polymers

Details Process for the preparation of crosslinked high polymers Process for the preparation of crosslinked high polymers

1978-06-07

1980-09-02

Lieberman, Paul

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

525452, 525439, 528 73, C08L 6300, C08G 1858

Patent

active

042207312

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.sub.3 with ethers or phosphonium compounds or H.sub.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.

REFERENCES:
patent: 2935488 (1960-05-01), Phillips
patent: 3198851 (1965-08-01), Hoy
patent: 3242108 (1966-03-01), McGary
patent: 3571442 (1969-10-01), DiLeone
patent: 3817918 (1974-06-01), Aufdermarsh
patent: 3984376 (1976-10-01), Yokono
patent: 4022721 (1977-05-01), Ashida
patent: 4070416 (1978-01-01), Narahara
patent: 4118373 (1978-10-01), Orvik
patent: 4128531 (1978-12-01), Toyoda
patent: 4129554 (1978-12-01), Karasawa
patent: 4130546 (1978-12-01), Goto
patent: 4138372 (1979-02-01), Nishikawa
Frisch, K. C. et al., Advances in Urethane Technology, vol. 2, pp. 241-268.
Lee et al., Handbook of Epoxy Resins, McGraw-Hill Book Co., New York, (1967), pp. 11-12 to 11-18.
May et al., Epoxy Resins, Marcel Dekker, New York, (1973), 293-296.

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