Two-component polyurethane composition
AssigneeSika Technology AG
InventorSteffen Kelch
Life of this patent
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Abstract
A two-component polyurethane composition including a polyol component and a polyisocyanate component, wherein the polyol component comprises at least one polyester polyol A1 based on dimer fatty acids and/or dimer fatty alcohols having an OH number of 65-350 mg KOH/g, at least one polybutadiene polyol A2 and at least one alkoxylated alkylenediamine A3. The polyurethane composition has high strength and only a minor dependence of the mechanical properties, especially strength, on temperature, especially in the range from −40° C. to +100° C.
Claims15
A two-component polyurethane composition consisting of a polyol component K1 and a polyisocyanate component K2;
- wherein the polyol component K1 comprises
- at least one polyester polyol A1 based on dimer fatty acids and/or dimer fatty alcohols having an OH number of 65-350 mg KOH/g;
- and
- at least one polybutadiene polyol having an OH functionality in the range of 2.1-2.9 and an OH number of 40-100 mg KOH/g A2;
- and
- at least one alkoxylated alkylenediamine having an OH number of 350-950 mg KOH/g A3;
- and wherein the polyisocyanate component K2 comprises
- at least one aromatic polyisocyanate B1,
- where the ratio of the OH groups of A1:A2 is 1:1-20:1.
A structural adhesive that bonds two substrates formed by using the two-component polyurethane composition as claimed in 1.
An infusion resin formed by using the two-component polyurethane composition as claimed in 1.
Dependencies are inferred from the claim text.