Isobutylene polymer and process for producing the same
申请人:KANEGAFUCHI KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP0722957A1
公开(公告)日:1996-07-24
The present invention provides a novel solvent which is capable of providing an excellent isobutylene polymer, little affects the environment, has a lower solubility in water than those of halogenated hydrocarbons having 1 or 2 carbon atoms and can be decomposed relatively easily.
Namely, the present invention relates to: a process for producing an isobutylene polymer, which comprises performing a cationic polymerization reaction in a solvent containing primary and/or secondary monohalogenated hydrocarbon(s) having 3 to 8 carbon atoms, and an isobutylene polymer thus obtained; and a process for producing an isobutylene polymer having a vinyl group introduced into the terminal thereof, which comprises reacting the isobutylene polymer produced above with 1,9-decadiene or allyltrimethylsialne, and an isobutylene polymer thus obtained.
A process for producing an isobutylene block copolymer, which comprises performing cationic polymerization of a monomer component containing isobutylene as a major monomer and a monomer component whose major monomer is not isobutylene in the presence of an initiator, wherein the polymerization is carried out in a mixed solvent containing a monohalogenated hydrocarbon solvent and a non-halogenated hydrocarbon solvent, the monohalogenated hydrocarbon solvent containing a primary monohalogenated hydrocarbon having three to eight carbon atoms and/or a secondary monohalogenated hydrocarbon having three to eight carbon atoms, the non-halogenated hydrocarbon solvent containing an aliphatic hydrocarbon and/or an aromatic hydrocarbon.
An object of the present invention is to provide a process for producing an isobutylene block copolymer, which process can provide a resin having a low content of a catalyst residue and high transparency. The object can be achieved by a process for producing an isobutylene block copolymer by living cationic polymerization using a Lewis acid, wherein, for removing the Lewis acid from a solution after the polymerization, the solution is charged into and mixed with water in which a nonionic surfactant with an HLB of 10 or less is contained in an amount of 0.01 to 0.5 part by weight based on 100 parts by weight of the isobutylene block copolymer.
Disclosed is a method for stably and efficiently removing a catalyst from an isobutylene polymer by improving the separatability of an organic phase and an aqueous phase during the operation wherein a catalyst is washed out from a reaction solution containing an isobutylene polymer by means of water. Specifically disclosed is a method for producing an isobutylene polymer which is characterized in that the water containing 0.00005 - 0.005 weight % of a nonionic polymer surfactant having a hydroxyl group is used when a reaction solution after polymerization which contains an isobutylene polymer is cleaned with water after deactivating the catalyst by treating the reaction solution with water and removing the aqueous phase.
The present invention has its object to provide a crosslinkable silyl group-terminated vinyl polymer-containing curable composition which secures a sufficiently long pot life and, at the same time, can be cured rapidly on the occasion of need and can give cured products excellent in thermal stability, oil resistance, weathering resistance, mechanical properties and adhesiveness, among others.
The present invention provides a curable composition containing (I) and (II) mentioned in the following: a vinyl polymer (I) having, on an average, at least one crosslinkable silyl group at its termini, and a photo acid generator (II).
The vinyl polymer (I) according to the present invention is preferably a (meth)acrylic polymer.