CN114806137A - Carbon dioxide-based TPU degradable material for rubber screen and preparation method thereof - Google Patents

Abstract

The invention relates to the technical field of TPU material application, in particular to a carbon dioxide-based TPU degradable material for a rubber screen and a preparation method thereof, wherein a degradation agent in the screen is metabolized by active strains such as fungi, bacteria, saccharomycetes and the like in the surrounding environment, and the remaining plastic is disintegrated into fine fragments without generating new pollution sources, so that the material is more environment-friendly compared with the traditional incineration treatment; the composition of the thermoplastic polyurethane elastomer comprises 75-100 wt% of TPU particles, 0.1-2 wt% of antioxidant, 0.1-10 wt% of degradation agent and 1-10 wt% of epoxy resin.

Description

Carbon dioxide-based TPU degradable material for rubber screen and preparation method thereof

Technical Field

The invention relates to the technical field of TPU material application, in particular to a carbon dioxide-based TPU degradable material for a rubber screen and a preparation method thereof.

Background

The TPU has the excellent characteristics of high tension, high tensile force, toughness and aging resistance, and is a mature environment-friendly material. At present, TPU is widely applied to the aspects of medical sanitation, electronic and electric appliances, industry, sports and the like, has the characteristics of high strength, good toughness, wear resistance, cold resistance, oil resistance, water resistance, aging resistance, weather resistance and the like which cannot be compared with other plastic materials, and simultaneously has a plurality of excellent functions of high waterproofness and moisture permeability, wind resistance, cold resistance, antibiosis, mildew resistance, warm keeping, ultraviolet resistance, energy release and the like.

Traditional rubber screens are manufactured with polyurethane added, and millions of tons of polyurethane are manufactured worldwide each day for foams, plastics, sports shoes, insulation and other products, but these materials are usually discarded after use. The discarded polyurethane is eventually landfilled or incinerated, which generates a large amount of toxic by-products, resulting in poor environmental protection.

Disclosure of Invention

In order to solve the technical problems, the invention provides the carbon dioxide-based TPU degradable material for the rubber screen and the preparation method thereof, wherein the degrading agent in the screen can be metabolized by active strains such as fungi, bacteria, saccharomycetes and the like in the surrounding environment, the remaining plastic is disintegrated into fine fragments, a new pollution source cannot be generated, and the material is more environment-friendly compared with the traditional incineration treatment.

The carbon dioxide-based TPU degradable material for the rubber screen and the preparation method thereof comprise 75-100 wt% of TPU particles, 0.1-2 wt% of antioxidant, 0.1-10 wt% of degradation agent and 1-10 wt% of epoxy resin.

The invention relates to a carbon dioxide-based TPU degradable material for a rubber screen and a preparation method thereof, wherein TPU particles are high polymer material particles which are formed by jointly reacting and polymerizing diisocyanate molecules such as diphenylmethane diisocyanate or toluene diisocyanate, macromolecular polyol and a chain extender.

The invention relates to a carbon dioxide-based TPU degradable material for a rubber screen and a preparation method thereof.

The invention relates to a carbon dioxide-based TPU degradable material for a rubber screen and a preparation method thereof.

The invention relates to a carbon dioxide-based TPU degradable material for a rubber screen and a preparation method thereof.

The invention relates to a carbon dioxide-based TPU degradable material for a rubber screen and a preparation method thereof, wherein the preparation method of the TPU degradable material comprises the following steps:

s1, mixing the TPU particles, the antioxidant, the degrading agent and the epoxy resin, putting the mixture into a reaction kettle, stirring the mixture at a high speed at a temperature of 125-135 ℃ in the kettle, and fully reacting for 8-10 minutes to obtain a TPU mixture;

s2, putting the TPU mixture into an internal mixer, and mixing and internally mixing at the temperature of 140-145 ℃;

and S3, conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

The invention has the beneficial effects that: the application provides a carbon dioxide base TPU degradable material for rubber screen, after rubber screen reachs life, the user abandons rubber screen, through using TPU degradable material to make rubber screen, after rubber screen is abandoned, degradant in the screen cloth can be metabolized by active bacterial such as fungi, bacterium, saccharomycetes among the surrounding environment, it disintegrates into fine fragment to leave plastics, can not produce new pollution sources, it is more environmental protection to compare traditional incineration disposal.

Detailed Description

The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Example 1

The TPU degradable material comprises 75 percent of TPU particles, 0.1 percent of antioxidant, 0.1 percent of degradation agent and 1 percent of epoxy resin by weight percentage;

the preparation method comprises the following steps: mixing TPU particles, an antioxidant, a degrading agent and epoxy resin, putting into a reaction kettle, then stirring at a high speed at a temperature of 125 ℃ in the kettle, and fully reacting for 8 minutes to obtain a TPU mixture; putting the TPU mixture into an internal mixer, and mixing and internally mixing at 140 ℃; and conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

Example 2

The TPU degradable material comprises 80 weight percent of TPU particles, 0.5 weight percent of antioxidant, 2 weight percent of degradation agent and 2 weight percent of epoxy resin;

the preparation method comprises the following steps: mixing TPU particles, an antioxidant, a degrading agent and epoxy resin, putting into a reaction kettle, then stirring at a high speed at a temperature of 125 ℃ in the kettle, and fully reacting for 8 minutes to obtain a TPU mixture; putting the TPU mixture into an internal mixer, and mixing and internally mixing at 140 ℃; and conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

Example 3

The TPU degradable material comprises 85 percent of TPU particles, 1 percent of antioxidant, 3 percent of degradation agent and 5 percent of epoxy resin;

the preparation method comprises the following steps: mixing TPU particles, an antioxidant, a degrading agent and epoxy resin, putting into a reaction kettle, then stirring at a high speed at the temperature of 135 ℃ in the kettle, and fully reacting for 9 minutes to obtain a TPU mixture; putting the TPU mixture into an internal mixer, and mixing and internally mixing at 145 ℃; and conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

Example 4

The TPU degradable material comprises 90 percent of TPU particles, 2 percent of antioxidant, 5 percent of degradation agent and 5 percent of epoxy resin by weight percentage;

the preparation method comprises the following steps: mixing TPU particles, an antioxidant, a degrading agent and epoxy resin, putting into a reaction kettle, then stirring at a high speed at the temperature of 135 ℃ in the kettle, and fully reacting for 10 minutes to obtain a TPU mixture; putting the TPU mixture into an internal mixer, and mixing and internally mixing at 145 ℃; and conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

Example 5

The TPU degradable material comprises 100 weight percent of TPU particles, 2 weight percent of antioxidant, 10 weight percent of degradation agent and 10 weight percent of epoxy resin;

the preparation method comprises the following steps: mixing TPU particles, an antioxidant, a degrading agent and epoxy resin, putting into a reaction kettle, then stirring at a high speed at the temperature of 135 ℃ in the kettle, and fully reacting for 10 minutes to obtain a TPU mixture; putting the TPU mixture into an internal mixer, and mixing and internally mixing at 145 ℃; and conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

Example 6

The TPU degradable material comprises 95 percent of TPU particles, 1 percent of antioxidant, 8 percent of degradation agent and 4 percent of epoxy resin by weight percentage;

the preparation method comprises the following steps: mixing TPU particles, an antioxidant, a degrading agent and epoxy resin, putting into a reaction kettle, then stirring at a high speed at the temperature of 130 ℃ in the kettle, and fully reacting for 10 minutes to obtain a TPU mixture; putting the TPU mixture into an internal mixer, and mixing and internally mixing at 145 ℃; and conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

Example 7

The TPU degradable material comprises 80 weight percent of TPU particles, 0.6 weight percent of antioxidant, 7 weight percent of degradation agent and 1 weight percent of epoxy resin;

the preparation method comprises the following steps: mixing TPU particles, an antioxidant, a degrading agent and epoxy resin, putting into a reaction kettle, then stirring at a high speed at a temperature of 125 ℃ in the kettle, and fully reacting for 10 minutes to obtain a TPU mixture; putting the TPU mixture into an internal mixer, and mixing and internally mixing at 145 ℃; and conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

Example 8

The TPU degradable material comprises 90 percent of TPU particles, 1.5 percent of antioxidant, 4.5 percent of degradation agent and 9 percent of epoxy resin by weight percentage;

the preparation method comprises the following steps: mixing TPU particles, an antioxidant, a degrading agent and epoxy resin, putting into a reaction kettle, then stirring at a high speed at a temperature of 134 ℃ in the kettle, and fully reacting for 8 minutes to obtain a TPU mixture; putting the TPU mixture into an internal mixer, and mixing and internally mixing at 140 ℃; and conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. The carbon dioxide-based TPU degradable material for the rubber screen is characterized by comprising 75-100 wt% of TPU particles, 0.1-2 wt% of antioxidant, 0.1-10 wt% of degrading agent and 1-10 wt% of epoxy resin.

2. The carbon dioxide-based TPU degradable material for the rubber screen and the preparation method thereof as claimed in claim 1, wherein the TPU particles are polymer material particles obtained by polymerization of diisocyanate molecules such as diphenylmethane diisocyanate or toluene diisocyanate, macromolecular polyol and a chain extender.

3. The carbon dioxide-based TPU degradable material for the rubber screen and the preparation method thereof as claimed in claim 2, wherein the chain extender is a low molecular weight polyol.

4. The carbon dioxide-based TPU degradable material for the rubber screen and the preparation method thereof as claimed in claim 1, wherein the antioxidant is one of aromatic amine antioxidant or hindered phenol antioxidant.

5. The carbon dioxide-based TPU degradable material for the rubber screen and the preparation method thereof as claimed in claim 1, wherein the degrading agent is carbohydrate such as starch.

6. The carbon dioxide-based TPU degradable material for the rubber screen and the preparation method thereof as claimed in claim 5, wherein the preparation method of the TPU degradable material comprises the following steps:

s1, mixing the TPU particles, the antioxidant, the degrading agent and the epoxy resin, putting the mixture into a reaction kettle, stirring the mixture at a high speed at a temperature of 125-135 ℃ in the kettle, and fully reacting for 8-10 minutes to obtain a TPU mixture;

s2, putting the TPU mixture into an internal mixer, and mixing and internally mixing at the temperature of 140-145 ℃;

and S3, conveying the internally mixed TPU mixture into a granulator, and extruding and granulating the TPU mixture through the granulator to obtain the TPU degradable material.