Comb polymers having a halobutyl rubber backbone

Details Comb polymers having a halobutyl rubber backbone Comb polymers having a halobutyl rubber backbone

1993-06-10

1994-08-30

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...

525313, 525315, 525250, 525 98, 525 99, C08F23616, C08F23618

Patent

active

053428960

ABSTRACT:
The subject invention relates to comb polymers having a halobutyl rubber backbone and to techniques for synthesizing such polymers. The comb polymers of this invention can be thermoplastic elastomers. For instance, halobutyl rubbers having sidechains which are derived from vinyl aromatic monomers are thermoplastic elastomers which can be made by a technique of the subject invention. Such thermoplastic elastomers typically have a chlorobutyl rubber backbone and side chains which are comprised of polystyrene. The subject invention more specifically discloses a process for grafting a lithium terminated vinyl aromatic polymer onto a halobutyl rubber which comprises: (1) capping the lithium terminated vinyl aromatic polymer with a diene monomer to produce a lithium terminated diene capped vinyl aromatic polymer, and (2) reacting the lithium terminated diene capped vinyl aromatic polymer with the halobutyl rubber to produce a halobutyl rubber having vinyl aromatic sidechains grafted thereto.

REFERENCES:
patent: 3862097 (1975-01-01), Milkovich et al.
patent: 3989768 (1976-11-01), Milkovich et al.
patent: 5162445 (1992-11-01), Powers et al.
Journal of Polymer Science: Part A-1, vol. 6, No. 10, Oct. 1968, pp. 2773-2783, Interscience Publishers, New York, US; Y. Minoura et al: "Reaction of chlorine-containing polymers with living polymers".

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