Dry expansible sealant and baffle composition and product

Details Dry expansible sealant and baffle composition and product Dry expansible sealant and baffle composition and product

1993-02-17

1993-11-30

Foelak, Morton

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 79, 1563084, 521 841, 521136, 521139, 521140, E04B 200, B32B 3120

Patent

active

052661334

ABSTRACT:
A dry, initially non-tacky, expansible, shaped and formed sealant and baffle component is provided for sealing and providing an acoustic baffle for cavities in the hollow structural components of a vehicle body or the like, which during the manufacturing operation is conveyed through a bake oven at an elevated temperature. The component is made up of a metal ion neutralized ethylene-.alpha.,.beta. ethylenically unsaturated carboxylic acid copolymer (ionomer), a blowing agent, and a tackifier, and optionally with an additive polymer and a cross-linking agent. The blowing agent is selected to be activated at the temperature of the bake oven so that the shaped and formed component expands in the body cavity to seal the cavity and prevent ingress of moisture, dust and other contaminating materials and particles, as well as to form a sound barrier therein.

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