HOUSTON - Dow Chemical Co. of Midland, Mich., says it has developed a material - ethylene/styrene interpolymer - that uses metallocene catalysts to combine ethylene and styrene monomers. Antonio Torres, Dow Plastics' senior research manager, said Dow plans to start up a pilot production plant by late 1995 and to have sample quantities available by early 1996.
Torres announced the project May 18 at MetCon '95, in Houston, sponsored by Catalyst Consultants Inc. of Spring House, Pa.
The interpolymers demonstrate a range of characteristics and features depending on the proportions of styrene and ethylene used, Torres said.
Interpolymers with a larger amount of styrene have semi-glassy characteristics, those with equal amounts of styrene and ethylene have elastomeric characteristics and those with more ethylene have semicrystalline characteristics.
While he said any of several styrene terpolymers could be used to make the interpolymer, he said Dow uses only one; he would not disclose which one.
The product is targeted to replace PVC or in asphalt modification or polymer impact modification and compatibilizers.