Shimming adhesive
Assignee3M Innovative Properties Company
InventorsSohaib Elgimiabi, Stefan Spiekermann, Lianzhou Chen
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Abstract
Provided are two-part shimming adhesives comprising a base part and a hardener part that are curable upon mixing. The base part includes a multifunctional epoxy resin having an epoxide functionality of at least three, a difunctional epoxy resin miscibly blended with the multifunctional epoxy resin. The hardener part includes a polyetheramine. Either the base part or hardener part further comprises an inorganic filler present in an amount from 10 percent to 60 percent, relative to the overall weight of the two-part curable shimming adhesive, and a phosphoric acid ester. The shimming adhesive enables joints to be assembled in one step, providing a significant advantage to the user.
Claims8
A two-part curable shimming adhesive comprising:
- a base part comprising:
- a multifunctional epoxy resin blend comprising a trifunctional epoxy resin and a tetrafunctional epoxy resin present in a relative weight ratio of from 1:1 to 8:1;
- and
- a difunctional epoxy resin miscibly blended with the multifunctional epoxy resin blend;
- wherein the multifunctional epoxy resin blend and the difunctional epoxy resin are present in a weight ratio of from 1:1 to 6:1;
- and
- a hardener part comprising:
- a polyetheramine present in an amount of from 5 percent to 30 percent, relative to the overall weight of the two-part curable shimming adhesive;
- wherein at least one of the base part and the hardener part further comprises an inorganic filler material, which comprises at least one inorganic filler, and a phosphoric acid ester;
- the inorganic filler material is present in an amount from 10 percent to 60 percent, relative to the overall weight of the two-part curable shimming adhesive, and the inorganic filler material and the phosphoric acid ester are present in a relative weight ratio of from 100:3 to 1000:3;
- wherein at least one of the base part and the hardener part further comprises core-shell rubber particles;
- and
- wherein the inorganic filler material comprises fumed silica.
Dependencies are inferred from the claim text.