摘要:
A process for modified-polymer production by which a high-purity modified polymer can be obtained in a short time. The process comprises chemically modifying a polymer in a supercritical fluid or high-temperature high-pressure fluid to give a modified polymer in which part or all of the monomer units constituting the unmodified polymer have been chemically modified.
摘要:
It is an object of the invention to provide a method for producing a modified polymer compound and a production apparatus of a modified polymer capable of producing a modified polymer compound with a high purity in a short time, and such a modified polymer compound. The invention provides a method for producing a modified polymer compound, which comprises chemically modifying a polymer compound in a supercritical fluid or a high temperature and high pressure fluid, said modified polymer compound being composed of monomer units obtainable by chemically modifying part of or all of monomer units composed of the polymer compound before modification reaction.
摘要:
It is an object of the present invention to provide a method of producing a polyvinyl acetal resin by which a polyvinyl acetal resin having a high acetalization degree can be produced even in a solid catalyst system, a polyvinyl butyral resin produced by the above-mentioned production method of a polyvinyl acetal resin, and a method of producing an esterified polyvinyl alcohol resin by which the esterification can be performed at high efficiency even in a solid catalyst system. The present invention is a method of producing a polyvinyl acetal resin, wherein a solution or a suspension containing a polyvinyl alcohol resin and a carbonyl compound is pressurized in the presence of a solid catalyst.