摘要:
A method of treating waste product containing flexible polyurethane resin includes adding a decomposing agent to the waste product to start a decomposition reaction; and terminating the decomposition reaction at a stage in which a diamine concentration derived from an isocyanate raw material of the flexible polyurethane resin is 2 wt % or lower to obtain a pasty intermediate product.
摘要:
A method of decomposing a thermosetting resin by a decomposer comprising the steps of: pre-heating the thermosetting resin up to a pre-heating temperature T0; kneading the pre-heated thermosetting resin together with a decomposer, and concurrently heating a mixture comprising the thermosetting resin and the decomposer up to a kneading temperature T1, thereby allowing a reaction to take place between the decomposer and the thermosetting resin to obtain a kneaded matter wherein the decomposer becomes consumed; and heating the kneaded matter to a maximum temperature T2 to thereby decompose the thermosetting resin; wherein the preheating temperature T0 is not higher than the boiling temperature of the decomposer; the kneading temperature T1 is not lower than the pre-heating temperature T0 but is lower than the thermal decomposition temperature of the thermosetting resin; the maximum temperature T2 is lower than the decomposition temperature of the thermosetting resin; and the pre-heating of the thermosetting resin is performed under the following conditions of temperature T0 and time t: 100° C.≦T0
摘要:
The invention relates to a resin composition that has, as a raw material, a product that is obtained by addition reacting a compound having a unsaturated carbon bond to a resin decomposed product obtained by chemically decomposing a urethane resin, alternatively, by decomposing a urethane resin with a compound having a unsaturated carbon bond. The resin composition can be solidified by polymerization by use of a cross-linking agent and an addition polymerization initiator. Furthermore, when a compound having two or more carboxyl groups or an anhydride thereof is blended together with the urethane resin decomposition, a resin composition can be obtained. When the resin composition obtained thereby is cured, a recycled resin with excellent properties can be obtained.
摘要:
A method of treating waste product containing flexible polyurethane resin includes adding a decomposing agent to the waste product to start a decomposition reaction; and terminating the decomposition reaction at a stage in which a diamine concentration derived from an isocyanate raw material of the flexible polyurethane resin is 2 wt % or lower to obtain a pasty intermediate product.
摘要:
An oil adsorbent includes a plurality of particles, each being constituted from at least one of an inorganic particle and an organic particle as a core and a polymer covering the core. The plurality of particles are aggregated to form an aggregate so that a porosity of the aggregate is 70% or more.
摘要:
A wastewater treatment method in an embodiment includes: mixing primary aggregates made of magnetic substances and a dispersion medium to make a suspension; and passing the suspension through a filter to allow the primary aggregates to remain on the filter and to form a secondary aggregate made of an aggregate of the primary aggregates. Further, the wastewater treatment method in the embodiment includes; passing wastewater through the secondary aggregate to remove suspended solids and oil in the wastewater; dispersing the secondary aggregate in a dispersion medium to decompose the secondary aggregate into the primary aggregates and to wash the primary aggregates; and collecting the primary aggregates with magnetic separation.
摘要:
A polymer composite is provided for a water treatment. The polymer composite with excellent workability is capable of adsorbing impurities in water, being rapidly separated from the water using magnetic forces. The polymer composite includes secondary aggregates. The secondary aggregates are formed of clumped particles, the particles being magnetic particles covered with a polymer. The polymer composite has porous structures suitable for adsorbing underwater impurities.
摘要:
A polymer composite is provided for a water treatment. The polymer composite with excellent workability is capable of adsorbing impurities in water, being rapidly separated from the water using magnetic forces. The polymer composite includes secondary aggregates. The secondary aggregates are formed of clumped particles, the particles being magnetic particles covered with a polymer. The polymer composite has porous structures suitable for adsorbing underwater impurities.
摘要:
According to one embodiment, an oil adsorbent includes inorganic particles and a polymer formed on surfaces of or between the inorganic particles. The content rate of the inorganic particles is 50% by volume or more and 97% by volume or less relative to the inorganic particles and the polymer, and an area of the inorganic particles is 30% or more and 60% or less relative to a cross-section of the inorganic particles and the polymer.
摘要:
The present invention provides a water treatment composition capable of effectively adsorbing pollutants in water treatment. The composition can be rapidly separated by use of magnetic force, and hence is excellent in workability. The composition comprises magnetic particles for water purification, and is suitably used in water treatment for removing oils and the like in water. The magnetic particles are prepared by subjecting magnetic powder to surface treatment with a particular organometallic compound. The organometallic compound comprises a metal atom connected to an alkoxy group and an amphipathic organic group.