CN110922743A - Recycling process of polyurethane foaming product - Google Patents
Recycling process of polyurethane foaming product Download PDFInfo
- Publication number
- CN110922743A CN110922743A CN201911085897.1A CN201911085897A CN110922743A CN 110922743 A CN110922743 A CN 110922743A CN 201911085897 A CN201911085897 A CN 201911085897A CN 110922743 A CN110922743 A CN 110922743A
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- CN
- China
- Prior art keywords
- parts
- weight
- polyurethane
- recycling process
- polyurethane foaming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 52
- 239000004814 polyurethane Substances 0.000 title claims abstract description 52
- 238000005187 foaming Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004064 recycling Methods 0.000 title claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 10
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 10
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 229920000570 polyether Polymers 0.000 claims abstract description 8
- 229920005862 polyol Polymers 0.000 claims abstract description 8
- 150000003077 polyols Chemical class 0.000 claims abstract description 8
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000000049 pigment Substances 0.000 claims abstract description 7
- 230000018044 dehydration Effects 0.000 claims abstract description 4
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 239000002699 waste material Substances 0.000 claims description 17
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 8
- 239000011496 polyurethane foam Substances 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000004611 light stabiliser Substances 0.000 claims description 3
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010169 landfilling Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a recycling process of a polyurethane foaming product, which comprises the following steps: (1) chopping unqualified polyurethane foaming products to form polyurethane foaming particles; (2) taking 15-20 parts by weight of polyurethane foaming particles, 15-25 parts by weight of cross-linking agent, 35-45 parts by weight of filler, 8-15 parts by weight of pigment and 2-4 parts by weight of antioxidant, mixing the materials, putting the mixture into a reaction kettle, stirring and heating to 80 ℃, and dehydrating the mixture in vacuum to prepare a component A; (3) according to the weight portion, 35-45 portions of toluene diisocyanate and 45-55 portions of polyether polyol are taken, the polyether polyol is put into a reaction kettle, stirred and heated to 90-120 ℃, vacuum dehydration is carried out, the temperature is reduced to 45-50 ℃, toluene diisocyanate is added, the reaction is slowly carried out to 85 ℃, and then the temperature is reduced to normal temperature, so that the component B is prepared.
Description
Technical Field
The invention relates to the field of polyurethane foaming products, in particular to a recycling process of a polyurethane foaming product.
Background
Polyurethane has become one of the most extensive polymer materials in the application field at present due to its excellent physical properties, good processability, excellent chemical medium resistance and aging resistance, and the yield and the application range are continuously expanding. However, with the expansion of the production scale and the expansion of the application fields, a large amount of waste is generated during the production and use of polyurethane, including a large amount of polyurethane foam for heat insulation and sofa cushions, waste polyurethane soles, waste polyurethane leather, and the like. If the waste materials are treated only by landfilling and incineration, not only land is occupied, but also the environment is polluted, and meanwhile, the waste of resources is caused. Therefore, the recycling problem of polyurethane is one of the great problems which are urgently needed to be solved by the polyurethane industry, the waste polyurethane is recycled, the environmental pollution is reduced, the production cost of a new product is reduced, and the economic and environmental protection significance is achieved. In the prior art, the scheme of using waste polyurethane in shoe manufacturing is adopted, so that the waste polyurethane can be used for manufacturing soles, uppers, shoe linings, vamps and the like, and the manufacturing cost can be effectively reduced. The application numbers are: CN201410677754.0 discloses a polyurethane composite material regenerated by using waste polyurethane soles and a preparation process thereof, which recycles the waste polyurethane soles, improves the utilization rate of materials, and the prepared material has good quality such as strength. However, the mechanical quality of the material prepared by the method is still poor, and the recycling effect of the waste polyurethane sole needs to be further improved.
Disclosure of Invention
The present invention aims to overcome the above-mentioned shortcomings and provide a technical solution to solve the above-mentioned problems.
The recycling process of the polyurethane foaming product comprises the following steps:
(1) chopping unqualified polyurethane foaming products to form polyurethane foaming particles;
(2) taking 15-20 parts by weight of polyurethane foaming particles, 15-25 parts by weight of cross-linking agent, 35-45 parts by weight of filler, 8-15 parts by weight of pigment and 2-4 parts by weight of antioxidant, mixing the materials, putting the mixture into a reaction kettle, stirring and heating to 80 ℃, and dehydrating the mixture in vacuum to prepare a component A;
(3) according to the weight parts, 35-45 parts of toluene diisocyanate and 45-55 parts of polyether polyol are taken, the polyether polyol is put into a reaction kettle, stirred and heated to 90-120 ℃, vacuum dehydration is carried out, the temperature is reduced to 45-50 ℃, the toluene diisocyanate is added, the reaction is slowly carried out to 85 ℃, and then the temperature is reduced to normal temperature, so that the component B is prepared;
(4) pouring the component A prepared in the step (2) and the component B prepared in the step (3) into a plastic mold according to the mass ratio of 5:3, curing at normal temperature, and demolding to obtain the polyurethane plastic.
Further, the polyurethane foaming product in the step (1) is hard unqualified insoles or waste polyurethane soles made by foaming polyurethane.
Further, the filler in the step (2) is concrete.
Further, the pigment in the step (2) is ferric oxide.
Further, the antioxidant in the step (2) adopts an antioxidant GA-80.
Further, 3 parts by weight of light stabilizer is added in the process of preparing the component A in the step (2).
Further, the crosslinking agent in the step (2) is trimethylolpropane.
Further, the diameter of the polyurethane foaming particles in the step (1) is 1-2 mm.
Compared with the prior art, the invention has the beneficial effects that: the process of the invention crushes the waste polyurethane shoes and puts the crushed waste polyurethane shoes into the production flow of the polyurethane track for utilization, thereby improving the reutilization of the waste polyurethane shoes, reducing pollution and protecting the natural environment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment of the invention, the recycling process of the polyurethane foaming product comprises the following steps:
(1) chopping unqualified polyurethane foaming products to form polyurethane foaming particles;
(2) taking 15-20 parts by weight of polyurethane foaming particles, 15-25 parts by weight of cross-linking agent, 35-45 parts by weight of filler, 8-15 parts by weight of pigment and 2-4 parts by weight of antioxidant, mixing the materials, putting the mixture into a reaction kettle, stirring and heating to 80 ℃, and dehydrating the mixture in vacuum to prepare a component A;
(3) according to the weight parts, 35-45 parts of toluene diisocyanate and 45-55 parts of polyether polyol are taken, the polyether polyol is put into a reaction kettle, stirred and heated to 90-120 ℃, vacuum dehydration is carried out, the temperature is reduced to 45-50 ℃, the toluene diisocyanate is added, the reaction is slowly carried out to 85 ℃, and then the temperature is reduced to normal temperature, so that the component B is prepared;
(4) pouring the component A prepared in the step (2) and the component B prepared in the step (3) into a plastic mold according to the mass ratio of 5:3, curing at normal temperature, and demolding to obtain the polyurethane plastic.
Further, the polyurethane foaming product in the step (1) is hard unqualified insoles or waste polyurethane soles made by foaming polyurethane.
Further, the filler in the step (2) is concrete.
Further, the pigment in the step (2) is ferric oxide.
Further, the antioxidant in the step (2) adopts an antioxidant GA-80.
Further, 3 parts by weight of light stabilizer is added in the process of preparing the component A in the step (2).
Further, the crosslinking agent in the step (2) is trimethylolpropane.
Further, the diameter of the polyurethane foaming particles in the step (1) is 1-2 mm.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (8)
1. The recycling process of the polyurethane foaming product is characterized by comprising the following steps: the method comprises the following steps:
(1) chopping unqualified polyurethane foaming products to form polyurethane foaming particles;
(2) taking 15-20 parts by weight of polyurethane foaming particles, 15-25 parts by weight of cross-linking agent, 35-45 parts by weight of filler, 8-15 parts by weight of pigment and 2-4 parts by weight of antioxidant, mixing the materials, putting the mixture into a reaction kettle, stirring and heating to 80 ℃, and dehydrating the mixture in vacuum to prepare a component A;
(3) according to the weight parts, 35-45 parts of toluene diisocyanate and 45-55 parts of polyether polyol are taken, the polyether polyol is put into a reaction kettle, stirred and heated to 90-120 ℃, vacuum dehydration is carried out, the temperature is reduced to 45-50 ℃, the toluene diisocyanate is added, the reaction is slowly carried out to 85 ℃, and then the temperature is reduced to normal temperature, so that the component B is prepared;
(4) pouring the component A prepared in the step (2) and the component B prepared in the step (3) into a plastic mold according to the mass ratio of 5:3, curing at normal temperature, and demolding to obtain the polyurethane plastic.
2. The recycling process of polyurethane foam products according to claim 1, characterized in that: the polyurethane foaming product in the step (1) is hard unqualified insoles or waste polyurethane soles made of polyurethane foaming.
3. The recycling process of polyurethane foam products according to claim 1, characterized in that: the filling agent in the step (2) is concrete.
4. The recycling process of polyurethane foam products according to claim 1, characterized in that: the pigment in the step (2) is ferric oxide.
5. The recycling process of polyurethane foam products according to claim 1, characterized in that: the antioxidant in the step (2) adopts an antioxidant GA-80.
6. The recycling process of polyurethane foam products according to claim 1, characterized in that: and 3 parts of light stabilizer by weight is added in the process of preparing the component A in the step (2).
7. The recycling process of polyurethane foam products according to claim 1, characterized in that: the cross-linking agent in the step (2) adopts trimethylolpropane.
8. The recycling process of polyurethane foam products according to claim 1, characterized in that: the diameter of the polyurethane foaming particles in the step (1) is 1-2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085897.1A CN110922743A (en) | 2019-11-08 | 2019-11-08 | Recycling process of polyurethane foaming product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085897.1A CN110922743A (en) | 2019-11-08 | 2019-11-08 | Recycling process of polyurethane foaming product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110922743A true CN110922743A (en) | 2020-03-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911085897.1A Pending CN110922743A (en) | 2019-11-08 | 2019-11-08 | Recycling process of polyurethane foaming product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110922743A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022067556A1 (en) * | 2020-09-29 | 2022-04-07 | 三晃股份有限公司 | Regenerated foamed particles, regenerated foamed and molded body, and manufacturing method therefor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040220286A1 (en) * | 2003-05-02 | 2004-11-04 | Kang Sung Soon | Noctilucent polyurethane chips and methods of manufacturing the same |
| JP2009121166A (en) * | 2007-11-16 | 2009-06-04 | Oku En-Tout-Cas Co Ltd | Construction method for reuse of elastic paving body |
| CN102391639A (en) * | 2011-09-30 | 2012-03-28 | 常熟市星源金属涂层厂 | Polyurethane and rubber foamed compound material and preparation method thereof |
| CN108102066A (en) * | 2016-11-25 | 2018-06-01 | 丹阳市雅本化工技术有限公司 | A kind of polyurethane plastic runway |
| CN110055858A (en) * | 2019-05-23 | 2019-07-26 | 惠州市环境科学研究所 | A kind of environment-friendly type mixing plastic cement race track and preparation method thereof |
-
2019
- 2019-11-08 CN CN201911085897.1A patent/CN110922743A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040220286A1 (en) * | 2003-05-02 | 2004-11-04 | Kang Sung Soon | Noctilucent polyurethane chips and methods of manufacturing the same |
| JP2009121166A (en) * | 2007-11-16 | 2009-06-04 | Oku En-Tout-Cas Co Ltd | Construction method for reuse of elastic paving body |
| CN102391639A (en) * | 2011-09-30 | 2012-03-28 | 常熟市星源金属涂层厂 | Polyurethane and rubber foamed compound material and preparation method thereof |
| CN108102066A (en) * | 2016-11-25 | 2018-06-01 | 丹阳市雅本化工技术有限公司 | A kind of polyurethane plastic runway |
| CN110055858A (en) * | 2019-05-23 | 2019-07-26 | 惠州市环境科学研究所 | A kind of environment-friendly type mixing plastic cement race track and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022067556A1 (en) * | 2020-09-29 | 2022-04-07 | 三晃股份有限公司 | Regenerated foamed particles, regenerated foamed and molded body, and manufacturing method therefor |
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