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US 12,654,360 B2Granted
Method for regenerating used resin
AssigneeToyoda Gosei Co., Ltd.
InventorsYasuaki Tanaka, Kinji Furukawa, Hitoshi Uchida
Life of this patent
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Abstract
A method for regenerating a used resin includes adding 0.03 wt % to 0.3 wt % of an amine compound-based VOC capturing agent to the used resin, performing melt-mixing, capturing at least formaldehyde and acetaldehyde among VOCs contained in the used resin by the VOC capturing agent, and vaporizing and removing volatile odor substances contained in the used resin by decompression.
Claims11
A method for regenerating a used resin, comprising
- adding 0.03 wt % to 0.3 wt % of an amine compound-based volatile organic compound (VOC) capturing agent to the used resin,
- performing melt-mixing of the used resin using a kneading extruder and capturing at least formaldehyde and acetaldehyde among volatile organic compounds (VOCs) contained in the used resin by the amine compound-based VOC capturing agent, and
- vaporizing and removing volatile odor substances contained in the used resin containing the captured VOCs by performing decompression of the melt-mixed used resin in a vacuum vent of the kneading extruder.
A method for regenerating a used resin using a kneading extruder having a vacuum vent, the method comprising:
- adding 0.03 wt % to 0.3 wt % of an amine compound-based volatile organic compound (VOC) capturing agent to the used resin within the kneading extruder, the 0.03 wt % to 0.3 wt % of an amine compound-based VOC capturing agent being based on a total of 100 parts by mass of resins contained in the kneading extruder,
- melt-mixing the used resin and the amine compound-based VOC capturing agent within the kneading extruder and capturing at least formaldehyde and acetaldehyde among volatile organic compounds (VOCs) contained in the used resin by the amine compound-based VOC capturing agent, and
- vaporizing and removing volatile odor substances contained in the used resin containing the captured VOCs by performing decompression of the melt-mixed used resin in the vacuum vent of the kneading extruder,
- wherein the amine compound-based VOC capturing agent includes at least one of aliphatic amines, diethylamine, hydroxylamine, hydrazine, hydrazide compounds, etheramine, amino acids, amino acid-modified silica gel, amine-supported aluminum hydroxide, aromatic amines, and heterocyclic amines.
1 more element
Dependencies are inferred from the claim text.