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    • 74. 发明授权
    • Aminoplast resin/thermoplastic polyamide presize coatings for abrasive article backings
    • 氨基塑料树脂/热塑性聚酰胺预涂磨料制品背衬的涂料
    • US06635719B2
    • 2003-10-21
    • US09828058
    • 2001-04-06
    • Robert J. DeVoeGregg D. Dahlke
    • Robert J. DeVoeGregg D. Dahlke
    • C08L7700
    • C09D161/20B24D3/28B24D11/02C08L61/20C08L77/00Y10T442/20Y10T442/2361Y10T442/2738Y10T442/2762Y10T442/2779Y10T442/2811Y10T442/60Y10T442/647Y10T442/651
    • The present invention provides a composition for use in coated abrasives. The curable composition comprises a mixture of: i) from about 30 to about 60 weight percent of an oligomeric aminoplast resin having on average at least one pendant &agr;,&bgr;-unsaturated carbonyl group per oligomeric unit; ii) from about 70 to about 40 weight percent of a thermoplastic polyamide miscible in said aminoplast resin, the weight percents being based on the total resin content; and iii) a sufficient amount of a catalyst for the curable oligomeric aminoplast resin having on average at least one pendant &agr;,&bgr;-unsaturated carbonyl group per oligomeric unit, said catalyst being stable at a temperature of mixing of the components. The curable composition can either be in the form of a melt-processable solid or a molten mixture. The present invention also provides single and multilayered treated backing substrates used in coated abrasives.
    • 本发明提供一种用于涂覆磨料的组合物。 可固化组合物包含以下混合物:i)约30至约60重量%的低聚氨基塑料树脂,每个低聚单元平均具有至少一个侧链α,β-不饱和羰基; ii)约70至约40重量%的可混合在所述氨基塑料树脂中的热塑性聚酰胺,所述重量百分比基于总树脂含量; 和iii)足量的用于可固化的低聚氨基塑料树脂的催化剂,其平均每个低聚单元具有至少一个α,β-不饱和羰基侧基,所述催化剂在组分的混合温度下是稳定的。 可固化组合物可以是可熔融加工的固体或熔融混合物的形式。 本发明还提供了用于涂覆的研磨剂中的单层和多层处理的背衬基材。