Invention Grant
US08097675B2 2,2′-MDI-based isocyanate mixtures, polyisocyanate polyaddition products prepared therefrom, processes for making the same and methods for their use 失效
2,2'-MDI-异氰酸酯混合物,由其制备的聚异氰酸酯加聚产物,其制备方法及其使用方法

2,2′-MDI-based isocyanate mixtures, polyisocyanate polyaddition products prepared therefrom, processes for making the same and methods for their use
Abstract:
Isocyanate mixtures comprising: (a) NCO prepolymers having an NCO content of 1.5 to 18 wt. %; and (b) 1 to 40 wt. % of monomeric 2,2′-diisocyanatodiphenylmethane, based on the isocyanate mixture; wherein the isocyanate mixture has a total NCO content of from 2 to 22 wt. %; polyisocyanate polyaddition products prepared therefrom; and methods of making the same.
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