Sika Technology Ag

Sika Corporation

Cheong Kow

Frank Hoefflin

Norman E Blank

Norman Blank

Gerald Fitzgerald

Juergen Finter

Robert D Myers

Randy Stratman

Kevin Christian Casey

Steven Rosenberg

Philip E Weber

Gerald E Fitzgerald

A physical barrier having a carrier device and a sealer material applied to the carrier device. The sealer material is configured to expand when it is activated. In its pre-activation state, the sealer material is flowable. The sealer material is applied directly to the carrier in its pre-activation state through a dispensing orifice without being previously molded.

Method for manufacturing physical barriers

A method for installing a constrained layer damper on a product of manufacture is disclosed. The method includes applying a layer of first polymeric material to a substrate of the product, wherein the first polymeric material is visco-elastic when solidified. Then, a second layer of polymeric material, which is stiff when solidified, is applied to the first polymeric material such that said first polymeric material is constrained between the second polymeric material and the substrate of the product. At least one of the layers of polymeric materials is dispensed in fluid form during the manufacture of the product from a bulk source of fluid material. The polymeric materials are chosen such that they do not require the application of heat above room temperature to solidify.

Constrained layer damper

Heat-expandable molded synthetic resin seal and baffle components adapted for use in automobile body cavities or the like are provided which are designed to preferentially expand upon heating in desired directions and to a desired degree, in order to properly seal irregular or special cavity shapes. The molded components of the invention have selected body surface portions thereof UV crosslinked to a depth of up to about 0.5 mm, while other portions of the molded body are not crosslinked; upon heating, the crosslinked portions expand at a slower rate and to a lesser extent than non-crosslinked body portions. The preferred synthetic resin includes a grafted anhydride polymer, a terminal epoxide polymer additive, a blowing agent, a UV photoinitiator and a UV crosslinkable resin system.

Acoustic baffle with predetermined directional expansion characteristics

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Troy, MI, United States of America

Cheong Kow