Pressure sensitive tape for forming water-tight field joints in

Stock material or miscellaneous articles – Layer or component removable to expose adhesive – Sectional layer removable

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Details

428355AK, 428355BL, 428447, 428451, 524521, 524528, 525235, 525240, B32B 712, C08L 2316, C08L 2322, C08L 2328

Patent

active

061208698

ABSTRACT:
An adhesive roofing tape is based on a combination of brominated butyl rubber and EPDM. A non-diene block terpolymer is interspersed in the cross-linked polymer network. A plasticizer and tackifier are included to provide resiliency and permanent tack. An important aspect of the invention is to use a high molecular weight polyisobutylene plasticizer and a peroxide curing system. Rapid crosslinking without concomitant rapid degradation of the brominated butyl rubber occurs and some limited degradation of the plasticizer contributes to surface tack. A method of making the adhesive roofing tape is also provided.

REFERENCES:
patent: 4742119 (1988-05-01), Close
patent: 4855172 (1989-08-01), Chiu
patent: 5234987 (1993-08-01), Hubbard et al.
patent: 5242727 (1993-09-01), Bridell et al.
patent: 5686179 (1997-11-01), Cotsakis et al.
patent: 5733621 (1998-03-01), Cotsakis et al.

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