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Ionomers with improved low temperature flex-crack resistance and improved process economics
Ionomers with improved low temperature flex-crack resistance and improved process economics
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机译：具有改善的低温抗挠裂性和改进的工艺经济性的离聚物
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摘要
Improved low temperature flex-crack resistant ionic copolymers of ethylene, unsaturated carboxylic acid and at least one softening comonomer that is capable of forming a homopolymer having a glass transition temperature of less than -40°C, such as alkyl acrylates and/or alkyl vinyl ethers and from about 0.5 to about 6.0 mole % of chain branches arising from the polymerization of ethylene, are obtained by direct or graft copolymerization, followed by neutralization of the carboxylic acid groups with metal ions, such ionic copolymers of ethylene being characterized by having from about 5 to about 20 chain branches arising from the polymerization of ethylene/1000 CH2 units of the polymer backbone, said ethylene chain branches being composed of butyl or longer branches, the copolymer being further characterized by satisfying the equation A + 2.05 B = C, wherein A is the mole percent of softening comonomer, B is the mole percent of butyl or longer chain branches derived from the polymerization of ethylene, and C is from about 1.5 to about 24.3.
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机译：乙烯，不饱和羧酸和至少一种能够形成玻璃化转变温度低于-40°C的均聚物的改进的耐低温抗龟裂离子共聚物，例如丙烯酸烷基酯和/或烷基乙烯基酯通过直接或接枝共聚，然后用金属离子中和羧酸基团，获得由乙烯聚合产生的醚和约0.5-约6.0摩尔％的链支链，所述乙烯的离子共聚物的特征在于具有乙烯/聚合物主链的1000 CH 2 单元的聚合产生约5至约20个支链，所述乙烯支链由丁基或更长的支链组成，所述共聚物的特征还在于满足方程A + 2.05 B = C，其中A是软化共聚单体的摩尔百分比，B是衍生自C的丁基或更长链支链的摩尔百分比乙烯的聚合，且C为约1.5至约24.3。
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