Butyl ionomer having improved surface adhesion

Details Butyl ionomer having improved surface adhesion Butyl ionomer having improved surface adhesion

2007-02-22

2010-02-16

Lipman, Bernard (Department: 1796)

Stock material or miscellaneous articles

Composite

Of metal

C525S326100, C525S329500, C525S329700, C525S329800, C525S329900, C525S330200, C525S332300, C526S242000, C526S291000

Reexamination Certificate

active

07662480

ABSTRACT:
A butyl rubber ionomer having improved adhesion to substrates whose surfaces have polar functional groups. Examples of such substrate materials include stainless steel, glass, mylar or Teflon®. The adhesion of the butyl rubber ionomer to the substrate is at least 25% greater than the adhesion of a non-ionomeric butyl rubber to the same substrate surface and with certain substrates is more than 150% greater. The adhesion is improved with increasing levels of multiolefin content in the butyl rubber ionomer. The adhesion is greatest for butyl rubber ionomers having a high multiolefin content (at least 3.5 mol% of multiolefin monomers or at least 1.5 mol % of residual multiolefins). By taking advantage of these high adhesion levels, a composite article can be formed between the butyl rubber ionomer and the substrate.

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