Crosslinkable rubber composition

Details Crosslinkable rubber composition Crosslinkable rubber composition

1989-02-27

1991-01-08

Schofer, Joseph L.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525124, 525283, 5253303, 5253305, 5253319, 5253325, 5253329, 5253333, 5253335, 525343, 525374, 525375, 525377, 525379, 525380, 525384, 525386, C08G 1806, C08F 832

Patent

active

049836846

ABSTRACT:
It is sometimes desirable to cure rubber compositions utilizing non-sulfur curing agents. The subject invention reveals rubber compositions which can be cured without utilizing sulfur or sulfur containing compounds. The subject invention more specifically disclosed a rubber composition which can be crosslinked by heating which is comprised of (1) at least one rubber having pendant blocked isocyanate groups bound thereto; and (2) at least one compound which contains at least 2 Zerewitinoff active hydrogens.
This invention also discloses crosslinking of elastomer compounds containing (1) at least one rubber having functionalized groups containing at least one Zerewitinoff active hydrogen and (2) at least one compound which contains at least two blocked isocyanate groups. This invention also discloses self-curing elastomers containing both blocked isocyanate groups and groups containing at least one active Zerewitinoff hydrogen.

REFERENCES:
patent: 3926875 (1975-12-01), Tsugukuni et al.

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