TWO-COMPONENT POLYURETHANE COMPOSITIONS, IN PARTICULAR SUITABLE FOR USE AS VISCOPLASTIC STRUCTURAL ADHESIVES

摘要

The invention concerns a two-component polyurethane composition including a polyol component K1 and a polyisocyanate component K2, the polyol component K1 including castor oil A1 and 1,2,3-propane triol A2, and the polyisocyanate component K2 including at least one aromatic polyisocyanate B1, the ratio in weight percent of (A1/A2) being between 4 and 50 and the ratio of all NCO groups of the aromatic polyisocyanates B1 to all the OH groups totaling (A1+A2)=1.15:1-85:1, and the total of all the OH groups of (A1+A2) being >93% of the total of all the OH groups of the two-component polyurethane composition, characterized by controllable hydrolytic degradability.

主权项

1. A two-component polyurethane composition consisting of a polyol component K1 and a polyisocyanate component K2;
wherein:
the polyol component K1 comprises castor oil A1 and 1,2,3-propanetriol A2,the polyisocyanate component K2 comprises at least one aromatic polyisocyanate B1,a ratio of the wt % of the castor oil A1 and the 1,2,3-propanetriol A2 is 4-50,a ratio of a sum of all NCO groups of the aromatic polyisocyanate B1:a sum of all OH groups of the castor oil A1 and the 1,2,3-propanetriol A2=1.15:1-0.85:1, anda sum of all OH groups of the castor oil A1 and the 1,2,3-propanetriol A2 is ≧93% of a sum of all OH groups of the two-component polyurethane composition.