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Method for preparing high-performance elastomer from waste polyurethane

A polyurethane and high-performance technology, applied in the field of polyurethane processing, can solve problems such as rising costs, failure to meet design requirements for adhesive force and shock absorption performance, and inability to effectively reuse polyurethane, so as to improve elastic quality and optimize surface structure characteristics and activity, the overall cost is not high

Inactive Publication Date: 2020-06-05
蚌埠星烁新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in use, it is found that the adhesive force and shock absorption performance of this elastomer can no longer meet the design requirements of existing products, etc., and further improvement is needed
In addition, there are also problems in the prior art that the cost of polyurethane is increased, and a large amount of waste polyurethane cannot be effectively reused.

Method used

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  • Method for preparing high-performance elastomer from waste polyurethane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of method utilizing waste polyurethane to prepare high-performance elastomer, comprises the steps:

[0039] (1) Microcrystalline cellulose treatment:

[0040] a. Mix microcrystalline cellulose and sulfuric acid solution, stir evenly, and then heat-preserve for 20 minutes, then obtain material A after centrifugal washing and drying treatment; the corresponding weight ratio when mixing microcrystalline cellulose and sulfuric acid solution is 1:6; The concentration of said sulfuric acid solution is 60%;

[0041] b. Mix the material A obtained in operation a with ethanol evenly, then add acetic acid dropwise to adjust the overall pH value to 5.5, then add silane coupling agent and polymethyl methacrylate, then add concentrated sulfuric acid dropwise and stir evenly, Insulated in a nitrogen atmosphere for 2 hours, and finally centrifuged, washed and dried to obtain material B for later use; when the material A is mixed with ethanol, the corresponding weight ratio is ...

Embodiment 2

[0049] A kind of method utilizing waste polyurethane to prepare high-performance elastomer, comprises the steps:

[0050] (1) Microcrystalline cellulose treatment:

[0051] a. Mix microcrystalline cellulose and sulfuric acid solution, stir evenly, and then heat-preserve for 20 minutes, then obtain material A after centrifugal washing and drying treatment; the corresponding weight ratio when mixing microcrystalline cellulose and sulfuric acid solution is 1:6; The concentration of said sulfuric acid solution is 60%;

[0052] b. Mix the material A obtained in operation a with ethanol evenly, then add acetic acid dropwise to adjust the overall pH value to 5.5, then add silane coupling agent and polymethyl methacrylate, then add concentrated sulfuric acid dropwise and stir evenly, Insulated for 2.3 hours under a nitrogen atmosphere, and finally centrifuged, washed and dried to obtain material B for later use; when the material A is mixed with ethanol, the corresponding weight rati...

Embodiment 3

[0060] A kind of method utilizing waste polyurethane to prepare high-performance elastomer, comprises the steps:

[0061] (1) Microcrystalline cellulose treatment:

[0062] a. Mix microcrystalline cellulose and sulfuric acid solution, stir evenly and then heat-preserve for 23 minutes, then get material A after centrifugal washing and drying treatment; when microcrystalline cellulose and sulfuric acid solution are mixed, the corresponding weight ratio is 1:7; The concentration of said sulfuric acid solution is 63%;

[0063] b. Mix the material A obtained in operation a with ethanol evenly, then add acetic acid dropwise to adjust the overall pH value to 5.8, then add silane coupling agent and polymethyl methacrylate, then add concentrated sulfuric acid dropwise and stir evenly, Insulated for 2.3 hours under a nitrogen atmosphere, and finally centrifuged, washed and dried to obtain material B for later use; when the material A is mixed with ethanol, the corresponding weight rati...

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Abstract

The invention discloses a method for preparing a high-performance elastomer from waste polyurethane, which belongs to the technical field of polyurethane processing, and comprises the following steps:(1) microcrystalline cellulose treatment, (2) raw material weighing, (3) mixing treatment, and (4) extrusion molding. The elastomer provided by the invention has the advantages of strong shock absorption and impact resistance, low rebound resilience, low overall cost, high compatible bonding strength with rubber, plastic and other polymer matrix materials, and good comprehensive quality.

Description

technical field [0001] The invention belongs to the technical field of polyurethane processing, and in particular relates to a method for preparing high-performance elastomers by using waste polyurethane. Background technique [0002] Thermoplastic Elastomer (TPE) is a new type of material that can be molded alone, and can be coated on the surface of PC, ABS and other materials by secondary injection molding or co-extrusion. It can obtain good adhesion without adhesives, thus obtaining The soft feel makes the product have anti-skid, anti-impact and other functions. Application number: CN200810207478.6 discloses a thermoplastic elastomer composition for bonding ABS and a preparation method thereof, which is based on thermoplastic polyurethane (TPU) and styrene-ethylene-butylene-styrene block copolymer ( SEBS) is a thermoplastic elastomer material used for bonding ABS as a basic raw material. However, thermoplastic polyurethane (TPU) has the disadvantages of too strong rigid...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L75/04C08L1/02C08L33/12
CPCC08L53/02C08L2205/035C08L2207/20C08L75/04C08L1/02C08L33/12
Inventor 郭艳
Owner 蚌埠星烁新材料科技有限公司
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