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US4139575A Polyoxymethylene molding composition containing melamine formaldehyde polycondensate 失效
聚甲醛成型组合物含有三聚氰胺甲醛缩聚物

Polyoxymethylene molding composition containing melamine formaldehyde
polycondensate
摘要:
In a molding composition comprising a polyoxymethylene, a melamine formaldehyde polycondensate and an antioxidation agent, the improvement wherein said melamine formaldehyde polycondensate is a finely divided, cross-linked, substantially water insoluble polycondensate comprising the precipitation product obtained by reacting formaldehyde and melamine in a molar ratio between 1.2 : 1 and 10.0 : 1; and wherein said polycondensate is in an amount of about 0.001 to about 30 percent by weight, related to the total weight of said composition.
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