公开(公告)号：US4252914A

公开(公告)日：1981-02-24

申请号：US68280

申请日：1979-08-20

申请人： Adel F. Halasa ,  Davis W. Carlson ,  James E. Hall

发明人： Adel F. Halasa ,  Davis W. Carlson ,  James E. Hall

IPC分类号： C08L23/00 ,  C08L7/00 ,  C08L21/00 ,  C08L23/02 ,  C08L53/00 ,  C08L101/00

CPC分类号： C08L23/02 ,  C08L53/00 ,  C08L23/10

摘要： Thermoplastic elastomer blends of alpha-olefin polymers and copolymers, such as polypropylene, having a melting point of at least 90.degree. C. with hydrogenated diblock copolymers of 1,4-polybutadiene and 1,2-polybutadiene have good physical properties such as low brittle point, good impact resistance at low temperatures, minimum creep at high temperatures, good elongation, good tensile and tear strengths and good impact strength. The blends can be repeatedly processed and still maintain good physical properties. The amount of alpha-olefin polymer or copolymer in the blend may range from about 10 percent to 60 percent, preferably 15 percent to about 48 percent with the amount of the hydrogenated butadiene block copolymer correspondingly ranging from about 90 percent to about 40 percent, preferably 85 percent to about 52 percent based on the combined weight of the two components. The blends are mixed at temperatures at least as high as the melting point of the alpha-olefin polymers or copolymer.

摘要翻译： 具有至少90℃熔点至少为90℃的α-烯烃聚合物和共聚物的热塑性弹性体共混物与1,4-聚丁二烯和1,2-聚丁二烯的氢化二嵌段共聚物具有良好的物理性能，如低脆性 低温下耐冲击性好，高温蠕变最小，伸长率好，拉伸强度高，撕裂强度好，冲击强度好。 混合物可以重复处理，并且仍然保持良好的物理性能。 共混物中α-烯烃聚合物或共聚物的量可以为约10％至60％，优选15％至约48％，氢化丁二烯嵌段共聚物的量相应地为约90％至约40％，优选 基于两个组件的总重量，85％至约52％。 共混物在至少与α-烯烃聚合物或共聚物的熔点一样高的温度下混合。