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Low-temperature-resistant high-strength polyurethane tire and preparation process thereof

A polyurethane tire and high-strength technology, which is applied in the field of polyurethane tires, can solve the problems of polyurethane tire tensile strength reduction, poor low-temperature strength and low-temperature strength of polyurethane tires, and achieve faster curing speed, good adhesion, and improved low-temperature strength Effect

Inactive Publication Date: 2020-07-24
烟台瑞特橡塑有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing technical solutions have the following defects: the existing polyester polyurethane solid tires prepared by polyester polyol, toluene diisocyanate and curing agent generally have the problem of poor low-temperature strength, which limits their use in low-temperature environments. Application: The low-temperature strength of polyurethane tires is poor, which will cause the tensile strength of polyurethane tires to decrease or even rupture at low temperatures

Method used

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  • Low-temperature-resistant high-strength polyurethane tire and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation process for low-temperature-resistant high-strength polyurethane tires, step 1, dehydrating 1000g of polyacrylate polyol, controlling the dehydration reaction temperature to 113°C, and the reaction time is 4 hours; then adding 200g of liquefied MDI at 78°C Down mixing reaction, the reaction time is 2 hours, to prepare the prepolymer.

[0032] Step 2, 100g of curing agent, 50g of liquid methyl silicone rubber (viscosity ≤ 8000mPa·s at 25°C), 40g of PTFE micropowder with a particle size of 0.8μm, 20g of di-tert-butyl peroxide, 10g of flame retardant Add the antioxidant and 10g of antioxidant into the mixer, and stir for 0.5 hour at room temperature with a stirring speed of 140rpm to prepare the auxiliary material.

[0033] Step 3, put the prepolymer prepared in step 1 and the auxiliary materials prepared in step 2 into tanks A and B of the pouring machine respectively, mix and pour them into the tire casting mold according to the above weight ratio, and vulc...

Embodiment 2

[0036] A preparation process for low-temperature-resistant high-strength polyurethane tires, step 1, dehydrating 800g of polyacrylate polyol, controlling the dehydration reaction temperature to be 110°C, and the reaction time is 4.5 hours; then adding 250g of liquefied MDI at 70°C Down mixing reaction, the reaction time is 2.5 hours, to prepare the prepolymer.

[0037] Step 2, 100g of curing agent, 100g of liquid methyl silicone rubber (viscosity ≤ 8000mPa·s at 25°C), 20g of PTFE micropowder with a particle size of 0.5μm, 30g of di-tert-butyl peroxide, 5g of flame retardant Add the antioxidant and 5g of antioxidant into the mixer, and stir for 0.3 hours at room temperature with a stirring speed of 120rpm to prepare auxiliary materials.

[0038] Step 3, put the prepolymer prepared in step 1 and the auxiliary materials prepared in step 2 into tanks A and B of the pouring machine respectively, mix and pour them into the tire casting mold according to the above weight ratio, and v...

Embodiment 3

[0041] A preparation process for low-temperature-resistant high-strength polyurethane tires, step 1, dehydrating 1500g of polyacrylate polyol, controlling the dehydration reaction temperature to 120°C, and the reaction time is 3.5 hours; then adding 150g of liquefied MDI at 90°C Down mixing reaction, the reaction time is 1 hour, and the prepolymer is prepared.

[0042] Step 2, 150g of curing agent, 50g of liquid methyl silicone rubber (viscosity ≤ 8000mPa·s at 25°C), 50g of polytetrafluoroethylene micropowder with a particle size of 15μm, 10g of di-tert-butyl peroxide, and 15g of flame retardant and 15g of antioxidant were added into a stirrer, stirred at room temperature for 1 hour, and the stirring speed was 200rpm to prepare auxiliary materials.

[0043] Step 3, put the prepolymer prepared in step 1 and the auxiliary materials prepared in step 2 into tanks A and B of the pouring machine respectively, mix and pour them into the tire casting mold according to the above weight...

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Abstract

The invention relates to the field of polyurethane tires, in particular to a low-temperature-resistant high-strength polyurethane tire and a preparation process thereof. The low-temperature-resistanthigh-strength polyurethane tire is prepared from 80-150 parts of polyol polymer; 15-25 parts of an isocyanate compound; 10-15 parts of a curing agent; 5-10 parts of double-component liquid organic silica gel; 2-5 parts of polytetrafluoroethylene micro powder; 1-3 parts of a radical initiator; 1-3 parts of additive. The low-temperature-resistant high-strength polyurethane tire has good low-temperature strength. The invention also comprises a preparation process of the low-temperature-resistant high-strength polyurethane tire. The preparation process comprises the following steps: 1, reacting the polyol polymer with isocyanate to obtain a prepolymer; 2, mixing the other components to obtain an auxiliary material; 3, performing casting molding, vulcanization and demolding by using a casting mold to obtain a semi-finished product; 4, secondary vulcanization. The preparation process of the low-temperature-resistant high-strength polyurethane tire has the effects of simplifying the tire production process and improving the product uniformity.

Description

technical field [0001] The invention relates to the technical field of polyurethane tires, in particular to a low-temperature-resistant high-strength polyurethane tire and a preparation process thereof. Background technique [0002] The full name of polyurethane is polyurethane, a polymer material. Polyurethane has two types: polyester type and polyether type, which can be made into polyurethane plastic, polyurethane fiber, polyurethane rubber and elastomer. Polyurethane rubber and elastomer properties are between plastic and rubber, oil resistance, wear resistance, low temperature resistance, aging resistance, high hardness and elasticity. Mainly used in shoe industry and medical industry. [0003] With the continuous improvement of technology, polyurethane rubber and elastomers have also achieved more and more achievements in tire manufacturing. Polyurethane solid tires are mainly used on forklifts. Forklifts are divided into cold storage forklifts and ordinary forklift...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L83/04C08L27/18C08K5/14B29C39/02B29C39/22B29C39/24B29C39/38B29C39/44C08G18/76C08G18/75C08G18/73C08G18/62C08G18/40
CPCB29C39/02B29C39/22B29C39/24B29C39/38B29C39/44B29L2030/006C08G18/40C08G18/6204C08G18/6225C08G18/73C08G18/755C08G18/758C08G18/7671C08L75/04C08L2205/03C08L83/04C08L27/18C08K5/14
Inventor 李锋
Owner 烟台瑞特橡塑有限公司
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