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US 12,202,933 B2Granted
High elastic modulus structural foam materials with improved strain to failure
AssigneeZephyros, Inc.
InventorsMichael Czaplicki, Keith Madaus, David Kosal
Life of this patent
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Abstract
A material comprising at least about 10% by weight polyvinyl butyral, a thermoplastic epoxy, wherein the ratio of polyvinyl butyral to thermoplastic epoxy is about 1 to 10 to about 1 to 4, and at least 2% but less than 15% by weight adducted carboxyl-terminated polymer, wherein the material has a strain to failure of greater than 2% and a modulus of at least 700 MPa.
Claims19
A material comprising:
- i) at least about 10% by weight polyvinyl butyral;
- ii) a thermoplastic epoxy, wherein the ratio of polyvinyl butyral to thermoplastic epoxy is 3 to 7 parts polyvinyl butyral to 1 to 2 parts thermoplastic epoxy;
- and
- iii) a polymeric particle component present in an amount of at least 16% by weight of the material;
- wherein the material has a strain to failure as measured by ISO 527 of greater than 2% but less than 7% and a tensile modulus of at least 900 MPa as measured by ASTM D638 Type IV test method when cured.
2 more elements
Dependencies are inferred from the claim text.