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US 12,195,646 B2Granted
Polyurethane adhesive for bonding crosslinked rubber
AssigneeDdp Specialty Electronic Materials US, LLC
InventorsThomas Clark, Roger Cassell, Daniel Sophiea, Sarah Mastroianni, Aaron Antwi, Huide Zhu
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Abstract
Disclosed herein are two-component polyurethane adhesive systems comprising a mixture of primary and secondary diamines.
Claims10
A two-component polyurethane adhesive system comprising Part A and Part B, wherein,
- Part A comprises (i) at least a first polyol, (ii) a primary diamine, and (iii) a secondary diamine;
- and
- Part B comprises a prepolymer that is a reaction product of at least one polyisocyanate and at least a second polyol,
- and wherein the content level of the primary diamine is about 7-19 wt %, based on the total weight of Part A;
- the combined content level of the primary diamine and the secondary diamine is about 10-30 wt %, based on the total weight of the two-component polyurethane adhesive system.
2 more elements
Dependencies are inferred from the claim text.