RECOVERING METHOD FOR THERMOPLASTIC RESIN WITH COATING FILM, REINFORCING MATERIAL (2)

• Main Authors: ITO FUMISAKU, OKAMOTO HIDEMASA
• Format: Patent
• Language: English
• Published: 15.08.1995
• Edition: 6
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

PURPOSE:To recover a resin component of high purity and reinforcing material by forming solid of specific water content value containing a thermoplastic resin with coating film and/or reinforcing material, carboxylate coupled to a polymer chain and water, and applying water to the solid to fine particles as aqueous dispersing material having characteristics dispersing in water state. CONSTITUTION:The method for recovering thermoplastic resin with coating film, reinforcing material comprises the steps of modifying the resin with the film and/or the material having carboxylate coupled to a polymer chain by melting and kneading, then applying water during the melting and kneading to neutralize the modified material, and forming the solid content to aqueous dispersing material having characteristics uniformly dispersing in water state as fine particles by using a twin-screw extruder having a plurality of vent ports. The dispersing material is apparently solid having a water content of 3-25wt.%. The dispersing material is thrown in water or hot water, and agitated to afford an emulsified material. The emulsified material is separated to resin content, coating film and/or reinforcing material by precipitating, centrifugal separation, filtering, etc.