| 摘要 |
The present invention relates to a polyurethane composition for coating a painting protection film coating consisting of (1) 100 parts by weight of acrylpolyol, (2) 0.5-1 parts by weight of reactive silicon diol, (3) 15-25 parts by weight of aliphatic family or alicyclic isocyanate, and (4) 5-10 parts by weight of a chain extender, for example, butanediol. The coating composition of the present invention includes 20-30 parts by weight of a urethane composition, 70-80 parts by weight of an organic solvent, 1-5 parts by weight of a melamine hardener, 1-5 parts by weight of an acid catalyst, 1-5 parts by weight of a paraffin wax, and 0.1-3 parts by weight of an antifoaming agent, for example, polysiloxan. |
