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CN-122011733-A - Bio-based thermoplastic elastomer composition and application thereof in transmission conveyor belt

CN122011733ACN 122011733 ACN122011733 ACN 122011733ACN-122011733-A

Abstract

The invention discloses a bio-based thermoplastic elastomer composition and application thereof in a transmission conveyor belt, and belongs to the field of compositions of high molecular compounds. The bio-based thermoplastic elastomer composition comprises, by weight, 30-70 parts of modified polyurethane elastomer, 15-45 parts of thermoplastic polyester elastomer, 2-6 parts of compatilizer, 1-3 parts of antioxidant and 1-3 parts of lubricant, wherein the modified polyurethane elastomer is obtained by reacting polytrimethylene ether glycol, bio-based polyol, 1, 5-pentanediol, functional filler and 1, 4-butanediol. The bio-based thermoplastic elastomer composition of the present invention is excellent in not only mechanical properties and processability but also wear resistance, heat resistance and durability when used in a transmission belt.

Inventors

  • JIANG HUABO
  • SUN LI

Assignees

  • 青岛科技大学
  • 卓越泰精工(青岛)有限公司

Dates

Publication Date
20260512
Application Date
20260312

Claims (10)

  1. 1. The bio-based thermoplastic elastomer composition is characterized by comprising the following raw materials, by weight, 30-70 parts of modified polyurethane elastomer, 15-45 parts of thermoplastic polyester elastomer, 2-6 parts of compatilizer, 1-3 parts of antioxidant and 1-3 parts of lubricant; the preparation method of the modified polyurethane elastomer comprises the following steps: Adding polytrimethylene ether glycol and bio-based polyol into a reaction kettle, heating under the protection of nitrogen, adding 1, 5-pentanediol and tin catalysts for reaction to obtain a prepolymer, adding functional filler into the prepolymer under the stirring condition, stirring and mixing, adding 1, 4-butanediol, stirring and mixing, pouring into a mould for solidification, cooling and demoulding to obtain the modified polyurethane foam.
  2. 2. The method for preparing a bio-based thermoplastic elastomer composition according to claim 1, wherein the bio-based polyol comprises the steps of: adding epoxidized soybean oil, cellulose nanocrystalline, hydrogenated rosin, isosorbide and triethylamine into a reaction kettle, heating to react under the protection of nitrogen, adding DMC catalyst and partial epoxypropane, heating to react under the protection of nitrogen, dripping the rest epoxypropane, reacting, and cooling to obtain the product.
  3. 3. The bio-based thermoplastic elastomer composition according to claim 1, wherein the functional filler is prepared by the following steps: adding Ti2TaAlC2 MAX phase ceramic material and hydrofluoric acid aqueous solution into a reaction kettle, heating to react under nitrogen protection, filtering, washing with water, and drying to obtain pretreated filler, adding N-aminoethyl-gamma-aminopropyl trimethoxysilane and ethanol aqueous solution into the reaction kettle, heating under nitrogen protection, adding the pretreated filler to react, filtering, washing with water, and drying to obtain the final product.
  4. 4. The composition of claim 1, wherein the tin catalyst is at least one of stannous octoate, dibutyltin dilaurate, and dibutyltin diacetate.
  5. 5. The bio-based thermoplastic elastomer composition according to claim 1, wherein the melt index of the thermoplastic polyester elastomer is 18-21g/10min at the temperature of 2.16kg and 220 ℃, the compatilizer is an ethylene-methyl acrylate-glycidyl methacrylate random terpolymer, the antioxidant consists of an antioxidant 1010 and an antioxidant 168, and the lubricant is at least one of calcium stearate, pentaerythritol stearate, oxidized polyethylene wax, ethylene bis-stearamide and oleamide.
  6. 6. The composition of claim 1, wherein the weight ratio of polytrimethylene ether glycol, bio-based polyol, 1, 5-pentanediisocyanate, functional filler, and1, 4-butanediol is 20-40:15-25:6-10:2-4:2-4.
  7. 7. The composition of claim 2, wherein the weight ratio of epoxidized soybean oil, cellulose nanocrystals, hydrogenated rosin, isosorbide, and propylene oxide is 12-18:1-3:2-8:5-10:80-100.
  8. 8. The composition of claim 3, wherein the Ti2TaAlC2 MAX phase ceramic material, the aqueous solution of hydrofluoric acid and the N-aminoethyl-gamma-aminopropyl trimethoxysilane are in a weight ratio of 3-6:50-80:1-3.
  9. 9. The method for producing a biobased thermoplastic elastomer composition according to any one of claims 1 to 8, comprising the steps of: premixing the modified polyurethane elastomer, the thermoplastic polyester elastomer, the compatilizer, the antioxidant and the lubricant in a mixer, adding the mixture into a double-screw extruder for melt blending, and extruding and granulating to obtain the bio-based thermoplastic elastomer composition.
  10. 10. Use of the bio-based thermoplastic elastomer composition according to any of claims 1-8 for the preparation of a drive belt.

Description

Bio-based thermoplastic elastomer composition and application thereof in transmission conveyor belt Technical Field The invention belongs to the field of compositions of high molecular compounds, and particularly relates to a bio-based thermoplastic elastomer composition and application thereof in a transmission conveyor belt. Background Thermoplastic elastomer (TPE) is used as a polymer material with both physical and mechanical properties of vulcanized rubber and processing convenience of thermoplastic plastics, and the thermoplastic elastomer (TPE) can be directly molded by thermoplastic plastics processing technologies such as injection molding, extrusion, blow molding and the like without hot vulcanization in the processing process, so that the production efficiency is remarkably improved, the process flow is simplified, and the thermoplastic elastomer (TPE) is widely applied to industrial products such as sealing parts, transmission belts, conveying belts, wires and cables, shock absorbing parts, rubber pipes and the like. The main stream TPE materials in the current market mainly depend on petrochemical raw material systems, for example, polyurethane thermoplastic elastomers (TPU) are prepared from isocyanate and polyester or polyether polyol through chemical reaction, and the main stream TPE materials have the defects of insufficient heat resistance stability, easy yellowing after long-term use, high compression set and the like although the main stream TPE materials are outstanding in wear resistance and elasticity. Especially in heavy-duty industrial scenes such as mines, building materials, ports and the like, the transmission conveyer belt coating layer is required to bear continuous and severe friction and scraping of irregular and sharp heavy-duty materials, and the traditional petroleum-based TPE material is easy to cause gradual surface abrasion and structural failure due to limited durability, so that the service life is shortened, and the replacement frequency and the use cost are increased. To cope with the exhaustion of petroleum resources and the pressure of carbon emission, bio-based thermoplastic elastomers are prepared by using biomass raw materials such as vegetable oil-derived polyols (e.g., castor oil-based polyols) and the like, aiming at reducing the dependence on petrochemical resources and improving sustainability. However, the existing bio-based TPE composition still has obvious short plates in the aspects of wear resistance, heat resistance stability and durability, severely restricts the application of the composition in the fields of high-end industrial products, particularly transmission conveyor belts, and is difficult to meet the strict energy requirements of the transmission conveyor belts under heavy-load and high-friction working conditions. For example, chinese patent CN109438653A discloses a biological thermoplastic polyurethane elastomer and a preparation method thereof, wherein the biological thermoplastic polyurethane elastomer comprises 30-95wt% of a polyol component (containing 50-100wt% of biological polyester polyol), 0-25wt% of a chain extender component (containing 50-100wt% of biological chain extender), 5-45wt% of a diisocyanate component (containing 10-60wt% of biological diisocyanate) and 0.001-0.1wt% of a catalyst component (containing 50-100wt% of non-tin environment-friendly catalyst), and the thermoplastic polyurethane elastomer has the advantages of high biological base content, good mechanical property and rapid molding, but the wear resistance and the heat resistance stability of the thermoplastic polyurethane elastomer are still to be improved. Chinese patent CN110229471A discloses a biodegradable thermoplastic elastomer material and a preparation method thereof, wherein the biodegradable thermoplastic elastomer material is prepared from, by mass, 50-70 parts of PBAT resin, 5-25 parts of biodegradable polyol ester, 10-20 parts of SEBS and 5-15 parts of compatilizer, wherein the biodegradable polyol ester is at least one of trimethylolpropane oleate, trimethylolpropane capryldecanoate, pentaerythritol oleate and isooctyl stearate, and the thermoplastic elastomer has the advantages of better elasticity and better degradation performance, but the heat resistance stability and durability of the thermoplastic elastomer still need to be improved. In addition, the existing flame-retardant antistatic TPE developed for meeting specific safety specifications improves the safety performance, but usually has the cost of sacrificing the mechanical performance, so that the strength is insufficient, the production cost is increased, and the durability and the economy of the conveying belt cannot be considered. Therefore, it is desirable to develop a new bio-based thermoplastic elastomer composition that further improves the combination of abrasion resistance, heat stability, and durability while maintaining environmental friendliness. Disclosure of Invention