Vibration dampening compositions
Assignee3M Innovative Properties Company
InventorSohaib Elgimiabi
Life of this patent
Estimating the term…
Abstract
A curable precursor composition for preparing a vibration dampening composition having a density of less than 0.9 g/cm3 said precursor composition comprising (i) one or more rigid epoxy resin (ii) one or more flexible epoxy resin, (iii) a first set of hollow microspheres, (iv) a second set of hollow microspheres wherein the microspheres of the first set are different in composition from the microspheres of the second set and, a curing agent capable of cross-linking the rigid and flexible epoxy resins. Also provided are vibration dampening compositions obtainable from the precursor compositions and methods of preparing such vibration dampening compositions.
Claims7
A curable two-part precursor composition comprising:
- I) part A comprising:
- (i) a curing agent that is capable of cross-linking the rigid epoxy resin and the flexible epoxy resin of part B, and
- II) part B comprising:
- (i) one or more rigid epoxy resin,
- (ii) one or more flexible epoxy resin,
- (iii) a first set of hollow microspheres which are compressible pre-expanded organic microspheres and have an average diameter of from about 90 μm to 200 μm, and
- (iv) a second set of hollow microspheres which are inorganic microspheres;
- wherein curing of the composition is initiated by the combination of the two parts and wherein the composition cures to form a vibration dampening composition having a density of less than 0.9 g/cm3.
Dependencies are inferred from the claim text.