Structural polyurethane adhesive having good adhesion after short-duration heating
AssigneeSika Technology AG
InventorsMartin Demmig, Antonio Corsaro
Life of this patent
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Abstract
A two-component polyurethane adhesive including a polyol component K1 and a polyisocyanate component K2; wherein the polyol component K1 includes at least one diol A1 having two primary hydroxyl groups and a molecular weight in the range from 60 to 150 g/mol, at least one triol A2 having an average molecular weight in the range from 1,000 to 10,000 g/mol, at least one polyester polyol A3 based on dimer fatty acids and/or dimer fatty alcohols, especially based on dimer fatty acids; and the polyisocyanate component K2 includes at least one polyisocyanate B1 and/or at least one polyurethane polymer B2 having isocyanate groups.
Claims15
A polyurethane adhesive consisting of a polyol component K1 and a polyisocyanate component K2;
- wherein
- the polyol component K1 comprises
- at least one diol A1 having two primary hydroxyl groups and a molecular weight in the range from 60 to 150 g/mol,
- at least one triol A2 having an average molecular weight in the range from 1,000 to 10,000 g/mol,
- at least one polyester polyol A3 based on dimer fatty acids and/or dimer fatty alcohols;
- and
- the polyisocyanate component K2 comprises
- at least one polyisocyanate B1 and/or
- at least one polyurethane polymer B2 having isocyanate groups.
Dependencies are inferred from the claim text.