首页>
外国专利>
Polymethacrylate molding composition, useful for the production of molded articles, is prepared by mixing toughened polymethacrylate and low mol. wt. polymethacrylate
Polymethacrylate molding composition, useful for the production of molded articles, is prepared by mixing toughened polymethacrylate and low mol. wt. polymethacrylate
A toughened polymethacrylate molding composition is prepared by mixing 80-98 wt.% of a toughened polymethacrylate molding composition and 2-20 wt.% of a low molecular weight polymethacrylate molding composition. A toughened polymethacrylate molding composition (I), having a Vicat softening point (ISO 306 B50) of at least 90 deg C, an impact strength (ISO 179/1eA) of at least of 3.0 kJ/m2 at 23 deg C and a melt flow rate (ISO 1133, 230 deg C, 3.8 kg) of at least 11 cm3/10 min, is prepared by mixing: (A) 80-98 wt.% of a toughened polymethacrylate molding composition comprising: (a) 70-99 wt.% of a matrix of 80-100 wt.% of radically polymerizable methylmethacrylate units and 0-20 wt.% of other radically polymerizable comonomers; and (b) 1-30 wt.% of a toughening agent; and (B) 2-20 wt.% of a low molecular weight polymethacrylate molding composition comprising: (i) 80-100 wt.% of radically polymerizable methylmethacrylate units and (ii) 0-20 wt.% of other radically polymerizable comonomers and has a viscosity (ISO 1628, Part 6) of 25-35 ml/g.
展开▼
机译：通过混合80-98重量％的增韧的聚甲基丙烯酸酯模塑组合物和2-20重量％的低分子量聚甲基丙烯酸酯模塑组合物来制备增韧的聚甲基丙烯酸酯模塑组合物。一种增韧的聚甲基丙烯酸酯模塑组合物（I），其维卡软化点（ISO 306 B50）为至少90摄氏度，在23摄氏度下的冲击强度（ISO 179 / 1eA）至少为3.0 kJ / m 2通过混合：（A）80-98 wt。％的增韧的聚甲基丙烯酸酯模塑组合物，制备熔体流动速率（ISO 1133，230℃，3.8 kg）至少11 cm 3/10 min，该组合物包含： （a）70-99 wt。％的基质，其中80-100 wt。％的可自由基聚合的甲基丙烯酸甲酯单元和0-20 wt。％的其他可自由基聚合的共聚单体; （b）1-30重量％的增韧剂; （B）2-20 wt。％的低分子量聚甲基丙烯酸酯模塑组合物，其中包括：（i）80-100 wt。％的可自由基聚合的甲基丙烯酸甲酯单元和（ii）0-20 wt。％的其他可自由基聚合的共聚单体，以及具有25-35 ml / g的粘度（ISO 1628，第6部分）。
展开▼
