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Low-hardness polyurethane rubber roll material and preparation method thereof

A technology of polyurethane glue and low hardness, which is applied in the field of organic polymer materials, can solve the problems of quality reduction, shortened life, poor wear resistance, etc., and achieve the effect of reducing carbon residue, long service life and good wear resistance

Active Publication Date: 2017-05-31
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the low-hardness polyurethane rubber rollers now use the method of adding plasticizers (DOP, BBP, etc.) to reduce the hardness, which will precipitate after long-term use, resulting in blooming on the surface of the rubber roller, deterioration of quality, and poor wear resistance. Reduced lifespan and environmental pollution problems
The prepolymer used has a high viscosity and a small proportion of curing agent, which is prone to problems such as inaccurate material ratio and air bubbles, resulting in a high rate of defective rubber rollers, and catalysts are often added to the curing agent, resulting in catalyst residues
Therefore, the above problems limit the use of polyurethane rubber rollers

Method used

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  • Low-hardness polyurethane rubber roll material and preparation method thereof
  • Low-hardness polyurethane rubber roll material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] 85 parts of polyester polyol (adipic acid-ethylene glycol-1,4-butanediol system, hydroxyl value 45mgKOH / g, acid value 0.6mgKOH / g, molecular weight 2500), 3.1 parts of curing agent ( Triisopropanolamine: 1,4-butanediol = 6:4) was added into a reactor with a vacuum degassing device, stirred evenly, and dehydrated at 100°C for 2 hours until the moisture content was lower than 0.05%. Then lower the temperature to 70°C, add 11.9 parts of toluene diisocyanate, stir rapidly within 30 minutes, and de-foam at -0.09MPa under vacuum, inject into the pre-treated mold, and mature at 110°C for 48h.

[0023] The resulting elastomer had a hardness of 45A.

Embodiment 2

[0025] 82.5 parts of polyester polyol (adipic acid-ethylene glycol-1,2-propylene glycol system, hydroxyl value 56mg KOH / g, acid value 0.9mgKOH / g, molecular weight 2000), 3.0 parts of curing agent (trihydroxy Methyl propane: 1,4-butanediol = 6:4), 1 part of fumed silica was added to a reactor with a vacuum degassing device, stirred evenly, and dehydrated at 100°C for 2 hours until moisture Less than 0.05%. Then lower the temperature to 65°C, add 14.5 parts of toluene diisocyanate, stir rapidly within 20 minutes, and de-bubble at -0.1MPa under vacuum, inject it into the pre-treated mold, and mature at 100°C for 48h. The resulting elastomer had a hardness of 50A.

Embodiment 3

[0027] 80 parts of polyester polyol (adipic acid-ethylene glycol-1,2-propylene glycol system, hydroxyl value 62mgKOH / g, acid value 1.1mgKOH / g, molecular weight 1800), 4.0 parts of curing agent (three different Propanolamine: diisopropanolamine: trimethylolpropane = 1:1:1) into the reactor with a vacuum degassing device, stir evenly, and dehydrate at 110°C for 1 hour until the moisture content is low at 0.05%. Then lower the temperature to 60°C, add 16 parts of toluene diisocyanate, stir rapidly within 15 minutes, and de-foam at -0.1MPa under vacuum, inject it into the pre-treated mold, and mature at 120°C for 24 hours. The resulting elastomer had a hardness of 55A.

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Abstract

The invention relates to a low-hardness polyurethane rubber roll material and a preparation method thereof. Through being metered in parts by weight, the low-hardness polyurethane rubber roll material is prepared from the following raw materials including 77.6 to 85 parts of polyester polyol, 3 to 4.6 parts of curing agents, 0 to 1 part of filling materials and 11.9 to 17.8 parts of toluene di-isocyanate. The low-hardness polyurethane rubber roll material has the advantages that the operation is convenient; the defective rate of the rubber roller is low; the industrial production is easy; no catalyst is used in a curing agent system; no catalyst is remained; the hardness reduction by a plasticizing agent addition mode is not used; the environment-friendly effect is good; the service life is long. In addition, bio-ethylene glycol, propanediol and butanediol are used as raw materials for preparing the polyester polyol; the carbon residue is reduced; the environment is protected; the obtained rubber roller has good wear resistance and long service life.

Description

technical field [0001] The invention belongs to the technical field of organic polymer materials, and relates to a low-hardness polyurethane rubber roller material and a preparation method thereof. Background technique [0002] Polyurethane elastomer is a widely used polymer material, involving industries such as military aerospace, light industry textiles, construction machinery, metallurgy and mining, transportation, medical equipment, grain processing, printing and coating. With the rapid development of my country's manufacturing industry, the application of rubber rollers in printing, textile, grain processing and other industries is increasing. Nitrile rubber is mostly used as the raw material of rubber rollers, which has the disadvantages of complex manufacturing process, large pollution, wear resistance, poor oil resistance, and short service life. Therefore, polyurethane has been used in the manufacture of rubber rollers by virtue of its excellent properties. Howev...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/32
CPCC08G18/3206C08G18/3275C08G18/3281C08G18/4238C08G18/6644C08G18/6655
Inventor 陈海良刘兆阳张宾董良
Owner SHANDONG INOV POLYURETHANE
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