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Waste polyester

To a stainless steel reactor equipped with a heating mantle, a charging port, a condenser for removing ethylene glycol, an inert gas inlet, and a sampling valve were added 400 g of bis(2-hydroxyethyl)terephthalate, 136 g of ethylene glycol, and 0.035 g (or 0.225 g) of sodium acetate trihydrate. The temperature was raised to between 190 and 200°C in 1 h and then 454 g of waste polyester... [Pg.556]

Glycolyzed PET waste, polyester polyols from, 559-560 Glyptal resins, 18... [Pg.584]

Manufacturing of a textile or clothing product from recycled consumer waste such as plastic bottles, waste polyester yams or fabrics. [Pg.132]

Despite this observation, there have been claims that specific types or mixtures of bacteria/enzymes can be utilised as a means of degrading PET. Research into this area has been boosted by environmental considerations, and is being actively pursued as a means of dealing with waste polyesters. [Pg.111]

The hydrolysis of waste polyesters, especially PET, has been described in detail and is extensively used for monomer(s) recovery. A long list of relevant references is given in [1]. [Pg.571]

Thermosetting Reactive Polymers. Materials used as thermosetting polymers include reactive monomers such as urea—formaldehyde, phenoHcs, polyesters, epoxides, and vinyls, which form a polymerized material when mixed with a catalyst. The treated waste forms a sponge-like material which traps the soHd particles, but not the Hquid fraction the waste must usually be dried and placed in containers for disposal. Because the urea—formaldehyde catalysts are strongly acidic, urea-based materials are generally not suitable for metals that can leach in the untrapped Hquid fractions. Thermosetting processes have greater utiHty for radioactive materials and acid wastes. [Pg.165]

Chlorination was found (172) to be the most suitable and effective method for decolori2ing and reducing the COD of waste dyebaths containing a2o dyes. These findings have been substantiated for chlorination and biochemical purification (173). A study (174) has been done on the technical and economic feasibiUty of a chlorination dye wastewater reclamation system for treating effluent that is suitable for reuse in dyeing of polyester/cotton blends with disperse and direct dyes. [Pg.383]

By depolymerizing PET waste with a polyol and subsequently condensing the oligomeric product with a polycarboxylic acid or anhydride, polyester resins are produced which have wide industrial applications. Depending on the polyol and polycarboxylic acid or anhydride used, saturated resins, alkyd resins, or unsaturated resins are obtained. PET wastes have been used for the production of alkyd resins in water thinnable paints. The materials obtained from the reaction of PET with a mixture of fatty acids high in linoleic acid content and trimethylolethane have been used in the preparation of water-dispersible coatings. Products of the depolymerization of PET with trimethylolpropane and pentaerythritol are used in the manufacture of high-solids paints. In the first step, PET is depolymerized with trimethylopropane and pentaerythritol at temperatures of 230-240°C. The final paint compositions contain 30-50% of PET depolymerization products.12... [Pg.530]

PET waste has been used in the manufacture of terephthalic electroinsulation lacquers. Here PET is heated in a mixture of a triol and glycol at temperatures of 230-260°C followed by catalytic transesterification and distillation of low-molecular-weight products of degradation until a polyester with the required softening temperature (ca. 60-100°C) is obtained. [Pg.530]

Unsaturated polyesters (UPs), 4, 18, 19 from PET waste, 560-561 Unsaturated polyester/styrene resin, preparation and cure of, 101 Unsaturated polyester thermosetting resins, syntheses of, 101-103 Unstirred interfacial process, 155 U-Polymer, 77... [Pg.604]

The effect of incorporating p-hydroxybenzoic acid (I) into the structures of various unsaturated polyesters synthesised from polyethylene terephthalate (PET) waste depolymerised by glycolysis at three different diethylene glycol (DEG) ratios with Mn acetate as transesterification catalyst, was studied. Copolyesters of PET modified using various I mole ratios showed excellent mechanical and chemical properties because of their liquid crystalline behaviour. The oligoesters obtained from the twelve modified unsaturated polyesters (MUP) were reacted with I and maleic anhydride, with variation of the I ratio with a view to determining the effect on mechanical... [Pg.31]

Progress in Rubber and Plastics Technology 16, No.l, March 2000, p.61-8 CHEMICAL RECYCLING OF WASTE SATURATED POLYESTERS AND URETHANE POLYMERS TO YIELD RAW MATERIALS FOR THE PRODUCTION OF POLYURETHANES Kacperski M Spychaj T Szczecin,Polytechnic... [Pg.42]

Teehniques are reviewed for the ehemical recycling of waste saturated polyesters (PETP and PBTP), and of waste... [Pg.47]

UNSATURATED POLYESTER RESINS ON THE BASE OF CHEMICAL DEGRADATION PRODUCTS OF PET WASTE FOR VARNISHES... [Pg.53]

A description is given of a comparative study of the glycolysis of PETP waste soft drinks bottles by various mixtures of EG and DEG with subsequent polyesterification of the glycolysed products by maleic anhydride in order to obtain unsaturated polyesters suitable for the production of varnishes. The processing characteristics such as viscosity, exotherm temperatures of curing, compatibility of resins with monomers was investigated with respect to the type and amount of reactive monomers. The mechanical properties of varnishes produced were analysed. 13 refs. [Pg.53]

Polymer Recycling 3,No.3, 1997/98, p.173-80 UNSATURATED POLYESTER RESINS FROM POLY(ETHYLENE TEREPHTHALATE) WASTE SYNTHESIS AND CHARACTERISATION Abdel-Azim AA Mekewi M A Gouda S R Egyptian Petroleum Research Institute Ain Shams,University Egypt,Military Technical College... [Pg.53]

CHEMICAL RECYCLING OE WASTE SATURATED POLYESTERS AND URETHANE POLYMERS TO YIELD RAW MATERIALS FOR THE PRODUCTION OF POLYURETHANES... [Pg.54]

Techniques for chemical recycling of waste saturated polyesters, mainly poly(ethylene terephthalate) and of waste polyurethanes to produce polyurethanes are reviewed. 29 refs. Articles from this journal can be... [Pg.54]

Groupe TBI is investing about FFr3m to build a 15,0001/ y aromatic polyester polyols plant on a greenfield site at Issoire, near Lyons. The novel, patented process uses postconsumer waste bottles made from PETP as feedstock. PU and modified PIR foams made using the APPs have excellent fire performance and good dimensional stability. GROUPE TBI... [Pg.55]

Polymers for Advanced Technologies 6, No. 11, Nov. 1995, p.688-92 MAKING POLYMER CONCRETE AND POLYMER MORTAR USING SYNTHESISED UNSATURATED POLYESTER RESINS FROM POLY(ETHYLENE TEREPHTHALATE) WASTE Abdel-Azim A AA Attia IA Egyptian Petroleum Research Institute Carro,Ain Shams University... [Pg.82]

See other pages where Waste polyester is mentioned: [Pg.557]    [Pg.30]    [Pg.30]    [Pg.21]    [Pg.1856]    [Pg.89]    [Pg.230]    [Pg.557]    [Pg.30]    [Pg.30]    [Pg.21]    [Pg.1856]    [Pg.89]    [Pg.230]    [Pg.241]    [Pg.314]    [Pg.51]    [Pg.56]    [Pg.19]    [Pg.414]    [Pg.419]    [Pg.208]    [Pg.27]    [Pg.545]    [Pg.546]    [Pg.557]    [Pg.559]    [Pg.586]    [Pg.33]    [Pg.37]    [Pg.37]    [Pg.43]    [Pg.54]    [Pg.60]    [Pg.82]    [Pg.99]   
See also in sourсe #XX -- [ Pg.571 , Pg.575 , Pg.576 ]



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Degradable polyesters solid waste applications

Polyesters textile processing wastes

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