Alkenylated toluenediisocyanates for use in preparing polyuretha

Details Alkenylated toluenediisocyanates for use in preparing polyuretha Alkenylated toluenediisocyanates for use in preparing polyuretha

1986-07-21

1988-12-27

Siegel, Alan

Organic compounds -- part of the class 532-570 series

Organic compounds

Isocyanate esters

521160, C07C 6900, C08G 1800

Patent

active

047941944

ABSTRACT:
This invention relates to a class of alkenylated toluenediisocyanates having at least one alkenyl group ortho to an isocyanate group. More particularly the toluendiisocyanates are represented by the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are hydrogen, C.sub.1-3 aliphatic, phenyl, halogen or alkoxy radicals, or R.sub.2 and R.sub.4 or R.sub.5 are bridged via an alkylene radical --(CH.sub.2).sub.y --wherein y=2 to 5, and x is one or two provided that in said formula at least one of R.sub.1, R.sub.2, R.sub.3, R.sub.4 or R.sub.5 is C.sub.1 or greater.
The above described alkenylated toluenediisocyanates have been found to be well suited for preparing crosslinkable condensation polymers by providing pendant unsaturation for post curing and polymerization. They are also well suited for preparing polyurethane and polyurea elastomer systems.

REFERENCES:
patent: 2468713 (1949-04-01), Kropa
patent: 3105845 (1963-10-01), Fetterly
patent: 3437680 (1969-04-01), Farrissey
patent: 3555071 (1971-01-01), Rao
patent: 3654336 (1972-04-01), Krimm
patent: 3878235 (1975-04-01), Schnabel
patent: 4399073 (1983-08-01), Shaefer

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