摘要:
A method for recovering elastomeric material such as rubber from tires comprising the steps of soaking the tires in a mixture of an oil and a volatile solvent to soften the rubber, subjecting the softened tires to shear conditions in a separator having at least two pairs of counter rotating rollers mounted one above the other. The recovered rubber can be carbonized in a microwave chamber to produce carbon and oil.
摘要:
The invention relates to a water-based two-component structural adhesive having a high initial adhesion, which is characterized in that at least one component contains a percentage of a low-molecular compound that is dissociable in water.
摘要:
A process for recycling a coloured thermoplastic material comprising an absorbed disperse dye comprises contacting the optionally comminuted coloured thermoplastic material with a caustic wash and recovering an at least partly colour-modified thermoplastic composition from the caustic wash.
摘要:
Paper comprised of suitable amounts of a hydroxy-phenoxyether polymer is effective to provide that paper with an increase in sizing or strength. Such paper may be prepared by intermixing dispersions or solutions of hydroxy-phenoxyether polymer with the pulp slurry or web during papermaking, or by application to formed paper. Paper may be coated or laminated by applying such dispersions or solutions.
摘要:
The present invention concerns a process a process for making polyester containing up to 50 percent by weight transparent recycled waste polyester by a novel equilibrium depolymerization process. The equilibrium depolymerization process of the present invention for making polyester containing transparent waste polyester comprises the steps of providing a stream containing oligomers, feeding transparent polyester waste to an extruder, melting in said extruder said waste polyester, extruding said molten polyester into said stream containing oligomers, completing the esterification creating a prepolymer mixture, and polymerizing said prepolymer mixture thereby producing polyester containing waste transparent polyester suitable for food grade applications. The present invention meets or exceeds the Food and Drug Administration (FDA) requirements for food contact with polyester and is thus useful in food contact applications, for example beverage containers and polyester film wrap.
摘要:
Thermoplastic polymers, rubbery polymeric components and reinforcing fillers are mixed and heated to a range of 380 °F to 440 °F. The resulting mixture is then fed into a Banbury mixer(s10), with the resulting mixture fed into a diverter(s16) feeding two molds(s17). The velocity of the piston of each mold being filled is controlled to thereby control the density of the molded product along its length. As each mold is filled, it is deposited in a cool water bath (50 °F-60 °F)(s20) while the next mold is being filled. The molds are sequentially transferred to an air cooling rack to complete the process. A texture, generally comprising indentations perpendicular to the longitudinal axis on the molded object, provides a frictional surface between the railway crosstie and the ballast beneath the corsstie.