Course of organometallic chemistry in faculty of science

We are doing chemical materials with usa now .and what we mainly need is rubber waste materials, we know many factories have some uncured rubber waste materials,we can use them. if you have news,pls contact us. this will save our resouce. what we need is unvulcanized rubber waste from tire making .like green tires,unvulcanized rubber waste,friction,used bladders,used belts ,used butyl inner tubes etc. hope we can do business together. my email is:alice@delta21.com thank you !