Crosslinked elastomeric polymers and process for producing the s

Details Crosslinked elastomeric polymers and process for producing the s Crosslinked elastomeric polymers and process for producing the s

1990-04-18

1993-04-06

Seidleck, James J.

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

Synthetic resins

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

525244, 525267, 525304, 525310, 525313, 525282, 528392, C08F25508, C08F27902, C08G 6700

Patent

active

052004694

ABSTRACT:
A crosslinked, unsaturated elastomeric polymer of a C.sub.4 to C.sub.7 isomonoolefin and a C.sub.4 to C.sub.14 conjugated multiolefin is produced by curing the corresponding uncrosslinked polymer having a low level of chemically bound halogen with a curing agent which reacts only with the halogen (e.g., zinc oxide) in combination with a bifunctional dienophile (e.g., a bismaleimide). The uncrosslinked elastomeric polymer is particularly suitable for use in the pharmaceutical industry, for example, for container closures. Shaped rubbery products comprising the crosslinked copolymer are also provided.

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patent: 4014852 (1977-03-01), Gesslev et al.
patent: 4166892 (1979-09-01), Maeda et al.
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patent: 4803250 (1989-02-01), Nagasaki et al.
K. Ho "Diels-Adler Reaction Curing of Chlorobutyl Rubber By Bis-Maleimides" Rubber Chemistry & Technology, vol. 42, pp. 42-54, (1989).
Vukov et al., "Crosslinking Efficiency of Some Halobutyl Curing Reactions", ACS meeting-Oct. 23-26, 1984 (copy thereof to be forwarded later).

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