REACTIVE DILUENTS FOR MODIFYING THERMOSETTING PAINT COMPOSITIONS AND PAINT COMPOSITIONS IN WHICH THEY ARE USED.

摘要

To provide paint compositions with which paint films which have excellent acid resistance, water resistance and weather resistance, and in particular excellent car-wash scratching resistance, can be formed and reactive diluents which can be used for obtaining these paint compositions. [Means of Resolution] A reactive diluent comprising a hydroxyl group containing resin which has been obtained by reacting (a) a compound where two or more hydroxyl groups are included in one molecule, (b) a compound where two non- sulfur modified isocyanate groups are included in one molecule and (c) a lactone compound, characterized in that said hydroxyl group containing resin has a hydroxyl group value of from 100 to 200 mgKOH/g and a weight average molecular weight of from 1,000 to 2,000, and contains from 20 to 40 mass% of structural units based on the lactone compound of the (c) component, and thermosetting paint compositions which contain these reactive diluents and hydroxyl group containing acrylic resins.