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Impact resistant polyureaurethane and polyureaurethane prepolymer having low nco/oh ratio
Impact resistant polyureaurethane and polyureaurethane prepolymer having low nco/oh ratio
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机译:nco / oh比低的耐冲击性聚脲氨基甲酸酯和聚脲氨基甲酸酯预聚物
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摘要
The present invention relates to a polyureaurethane wherein the prepolymer comprising said polyureaurethane has a NCO to OH equivalent ratio of from 2.0 to less than 2.5. In an embodiment, the polyureaurethane prepolymer comprises a polyisocyanate and at least one OH-containing material, which can be reacted with an amine-containing curing agent to produce the polyureaurethane of the present invention.
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