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US 10,590,251 B2Granted
Heat stabilized soft expandable sealant compositions
AssigneeZephyros, Inc.
InventorsCraig Chmielewski, Abraham Kassa, Justin Kaffenberger
Life of this patent
Estimating the term…
Abstract
Soft, heat activated sealant compositions heat stabilized through the addition of a phenolic resin to provide a uniform volume expansion over a wide range of temperatures are disclosed.
Claims20
A composition comprising:
- a polymeric mixture including one or more ethylene-propylene-diene monomer elastomers (EPDM), the EPDM aiding in tackiness of the composition, and the composition including about 4% to about 13% by weight EPDM;
- about 0.5% to about 2.0% by weight phenol-formaldehyde resin that is present to stabilize the composition upon expansion so that the composition retains at least a same expansion level when exposed to temperatures in a range of from about 376° F. to about 450° F. as it does when exposed to temperatures within a range of from about 300° F. to about 375° F.;
- an ethylene terpolymer for making the composition tacky;
- at least about 0.1% and at most about 7% by weight of a peroxide based curing agent;
- about 0.01% to 3% by weight of an acrylic monomer;
- a latent blowing agent, present in an amount of about 5.0 to about 6.5 parts by weight of the composition, that activates upon exposure to temperatures of about 300° F. to about 450° F. in an e-coat oven;
- wherein the phenol-formaldehyde resin is adapted to form cross-links with the EPDM, upon heating and in the presence of bromine, increasing a molecular weight of the composition;
- wherein the expansion level of the composition, upon exposure to heat, is about 1100% to 3000% above an original volume of the composition prior to expansion;
- and
- wherein the composition is an expandable foaming composition.
7 more elements
A composition comprising:
- a) a polymeric mixture including:
- i) one or more ethylene terpolymers for making the composition tacky for application to a substrate prior to expansion;
- ii) an aramid filler;
- iii) an EPDM rubber present in an amount of about 4% to about 13% by weight of the composition;
- b) a peroxide-based curing agent;
- c) a heat activated latent blowing agent, present in an amount of about 5.0 to about 6.5 parts by weight of the composition, that activates upon exposure to temperatures of about 300° F. to about 450° F. in an e-coat oven;
- d) about 0.01% to about 3% by weight of an acrylic monomer;
- e) about 0.5% to about 2.0% by weight phenol-formaldehyde resin that stabilizes the composition during expansion so that the composition is adapted to retain at least a same expansion level when exposed to temperatures in a range of from about 376° F. to about 450° F. as it does when exposed to temperatures within a range of from about 300° F. to about 375° F.;
- wherein the composition expands when exposed to any temperature in a range of from about 300° F. to about 400° F.;
- wherein the expansion level of the composition, upon exposure to heat, is about 1100% to 3000% above an original volume of the composition prior to expansion;
- wherein the composition is an expandable foaming composition.
8 more elements
Dependencies are inferred from the claim text.