Recycling and reusing process of polyurethane foaming product
The invention discloses a recycling and reusing process of a polyurethane foaming product. The recycling and reusing process comprises the following steps: (1) chopping an unqualified polyurethane foaming product to form polyurethane foaming particles; (2) taking 15-20 parts by weight of the polyure...
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Format: | Patent |
Sprache: | chi ; eng |
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Zusammenfassung: | The invention discloses a recycling and reusing process of a polyurethane foaming product. The recycling and reusing process comprises the following steps: (1) chopping an unqualified polyurethane foaming product to form polyurethane foaming particles; (2) taking 15-20 parts by weight of the polyurethane foaming particles, 15-25 parts by weight of a cross-linking agent, 35-45 parts by weight of afiller, 8-15 parts by weight of a pigment and 2-4 parts by weight of an antioxidant, mixing the materials, putting the mixture into a reaction kettle, stirring the mixture, heating the reaction kettleto 80 DEG C, and dehydrating the mixture in vacuum to prepare a component A; (3) taking 35-45 parts by weight of toluene diisocynate and 45-55 parts by weight of polyether polyol, putting the polyether polyol into the reaction kettle, carrying out stirring, heating to 90-120 DEG C, carrying out vacuum dehydration, cooling to 45-50 DEG C, adding the toluene diisocynate, performing reaction slowlyto 85 DEG C, and cooling to |
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