Heat expandable foam
AssigneeSika Technology AG
InventorsLeslie Michele WOLSCHLEGER, Jena MABILIA
Life of this patent
Estimating the term…
Abstract
A composition for an expandable sealant including at least one polymeric material selected from the group consisting of low density polyethylenes (LDPE), linear low density polyethylenes (LLPDE), ethylene vinyl acetate (EVA), ethylene methacrylate (EMA), and ethylene-butyl acrylate (EnBA); and a chemical blowing agent, wherein the composition is substantially free of a cross-linking agent.
Claims15
A composition for an expandable sealant, comprising:
- at least one polymeric material selected from the group consisting of low density polyethylenes (LDPE), linear low density polyethylenes (LLPDE), ethylene vinyl acetate (EVA), ethylene methacrylate (EMA), and ethylene-butyl acrylate (EnBA);
- and
- a chemical blowing agent,
- wherein the composition is substantially free of a cross-linking agent.
An expansible sealant and baffle component for sealing and providing an acoustic baffle for a cavity that is subjected to a predetermined elevated temperature during a manufacturing operation, the component comprising:
- a polymeric material selected from the group consisting of low density polyethylenes (LDPE), linear low density polyethylenes (LLPDE), ethylene vinyl acetate (EVA), ethylene methacrylate (EMA), ethylene-butyl acrylate (EnBA), and mixtures thereof;
- and
- a chemical blowing agent selected from the group consisting of 4,4′-oxybis(benzenesulfonylhydrazide) and sodium bicarbonate;
- and
- optionally a carrier element;
- wherein the component is substantially free of a cross-linking agent.
Dependencies are inferred from the claim text.