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High abrasion-resistance polyurethane elastomer and preparation method thereof

A polyurethane elastomer, high wear-resistant technology, applied in the field of polyurethane products, can solve the problems of high price, achieve the effect of improving wear resistance, excellent wear resistance and mechanical properties, and improving dispersion uniformity

Active Publication Date: 2014-07-16
珠海迈科思科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Patent document CN102264786A discloses a shoe-shaped pressure belt, which includes a polyurethane polymer prepared from a blend of isocyanate group-containing prepolymer and chain extender, the prepolymer is made of p-phenylene diisocyanate (PPDI) preparation, and the chain extender blend includes methyl-bis(3-chloro-2,6-diethyl-aniline) (MCDEA), which uses expensive raw material PPDI

Method used

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  • High abrasion-resistance polyurethane elastomer and preparation method thereof
  • High abrasion-resistance polyurethane elastomer and preparation method thereof
  • High abrasion-resistance polyurethane elastomer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Synthesis of component A: first mix 1000g polyester polyol LM2456, 100g DEP, 10g methyl silicone oil and 30g white carbon black, then put them into a ball mill for secondary mixing and dispersion, then take 585g into the reactor, heat to 125°C, vacuum After 2 hours of dehydration, the material temperature was lowered to 70°C, 220g of TDI was added, and the reaction was carried out at 75°C under nitrogen protection for 2h.

[0027] Preparation of component B: Melt MOCA and MCDEA respectively and mix them evenly in a molar ratio of 1:0.5.

[0028] Preparation of elastomer: Mix and defoam components A and B according to the chain extension coefficient of 0.93, pour into a 2mm mold at 100°C, demould for 40 minutes, vulcanize at 125°C for 12 hours, and measure performance after 7 days at room temperature. The properties of the obtained materials are shown in Table 2.

Embodiment 2

[0030] Synthesis of component A: first mix 1000g of PTMG-1000, 20g of fluorocarbon emulsion and 60g of white carbon black, then put them into a ball mill for secondary mixing and dispersion, then take 510g into the reactor, heat to 120°C, and dehydrate under vacuum for 2 hours. Lower the material temperature to 70°C, add 242g of TDI, and react at 95°C for 1.5h under the protection of nitrogen.

[0031] Synthesis of component B: Melt MOCA and MCDEA respectively and mix them evenly in a molar ratio of 1:1.5.

[0032] Preparation of elastomer: After mixing and defoaming components A and B according to the chain extension coefficient of 0.9, pour it into a 2mm mold at 120°C, demould it for 20 minutes, vulcanize at 100°C for 16 hours, and measure its performance after standing at room temperature for 7 days. The properties of the obtained materials are shown in Table 2.

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Abstract

The invention discloses a high abrasion-resistance polyurethane elastomer and a preparation method thereof. The high abrasion-resistance polyurethane elastomer comprises two parts, namely a prepolymer component (component A ) and a chain extender component (component B ), wherein the component A comprises the following substances in parts by weight: 100 parts of polyester or polyether glycol, 15-30 parts of TDI (Toluene Diisocynate), 0-20 parts of softening agents, 0.5-2 parts of organic anti-abrasive agents and 2-10 parts of gas-phase white carbon black; the component B is a mixed diamine chain extender and comprises methyl-bis(3-chlorine-2,6-diethyl-phenylamine) (MCDEA) and other diamine chain extender mixtures. The material disclosed by the invention has excellent abrasion-resistant property and mechanical property and can be used for preparing products in the field of preparation equipment, such as a polyurethane screen plate, a screen, a conveyer belt and the like.

Description

technical field [0001] The invention relates to a polyurethane elastomer and a preparation method thereof, in particular to a polyurethane product with excellent wear resistance and mechanical properties. Background technique [0002] Polyurethane sieve plate and screen mesh are the working face of ore screening. During operation, materials will have sliding friction, rolling friction, impact, wear and corrosion on the sieve plate and screen mesh. The working environment is harsh. Wear resistance is an important factor affecting its service life. The materials used for polyurethane sieve plates and screens on the market are usually polyester / toluene diisocyanate (TDI) / 4,4'-diamino-3,3' -Didichlorodiphenylmethane (MOCA) system, its wear (DIN53516) is generally greater than 50mm 3 , and the service life is usually three to six months. [0003] In actual use of polyurethane materials, the wear resistance is usually improved by replacing raw materials or adding anti-wear addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08L83/04C08L27/12C08K3/36C08K5/01C08G18/66C08G18/48C08G18/42C08G18/32
Inventor 潘洪波韦永继陈战有石雅琳
Owner 珠海迈科思科技有限公司
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