发明授权
US4312798A Polyurethane coating solutions or dispersions 失效
聚氨酯涂料溶液或分散体

Polyurethane coating solutions or dispersions
摘要:
The invention relates to polyurethane coatings prepared from the reaction products of a polyester or polyether, a hydroxyl compound containing acetylenic or ethylenic unsaturation and an organic polyisocyanate.
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