Process for the preparation of dimethylketene and then of polydimethylketene fro isobutyric anhydride
申请人:Hub Serge
公开号:US20060270878A1
公开(公告)日:2006-11-30
The present invention relates to a process for the preparation of dimethylketene (DMK) and then of polydimethylketene (PDMK) by polymerization of DMK. More specifically, the DMK is obtained by pyrolysis by isobutyric anhydride (IBAN), the latter decomposing under the effect of heat (pyrolysis) to give isobutyric acid (IBA) and DMK. One mole of pyrolyzed IBAN gives one mole of IBA and one mole of DMK.
The invention provides for polymerization processes to produce polymers utilizing boiling pool reactor systems and diluents including hydrofluorocarbons.
本发明提供了利用沸腾池反应器系统和包括氢氟碳化物的稀释剂进行聚合过程以生产聚合物的方法。
Polymers with new sequence distributions
申请人:Shaffer Daniel Timothy
公开号:US20060100409A1
公开(公告)日:2006-05-11
The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.
Polymers substantially free of long chain branching
申请人:Milner Thomasq Scott
公开号:US20060094847A1
公开(公告)日:2006-05-04
The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers substantially free of long chain branching. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, substantially free of long chain branching.
Halogenated polymers with new sequence distributions
申请人:Shaffer Daniel Timothy
公开号:US20050101751A1
公开(公告)日:2005-05-12
The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel halogenated polymers with new sequence distributions. In particular, the invention relates to halogenated copolymers of an isoolefin, preferably isobutylene, and a multiolefin, preferably a conjugated diene, more preferably isoprene, with new sequence distributions.