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Preparation method for water-lubricated polyurethane composite material

A composite material and polyurethane technology, which is applied in the field of preparation of water-lubricated polyurethane composite materials, to achieve the effects of improving wear resistance, good self-lubricating performance, and avoiding marine environmental pollution

Active Publication Date: 2015-07-29
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of using silicone-modified polyurethane composites for water-lubricated bearings has not been reported, and silicone-modified polyurethane composites have excellent water-lubricating properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First add polyethylene glycol (MW.400) and 1% hydroxyl-terminated polydimethylsiloxane (MW.2800) to mix with toluene-2,4-diisocyanate, toluene-2,4-diisocyanate and poly The molar ratio of ethylene glycol is 2:1, then add 0.5% catalyst dibutyltin dilaurate, pass N at 80°C 2 Protect (0.05MPa) mechanical stirring, synthesize the prepolymer after 1 hour of reaction, then add 3,3'-dichloro-4,4'-diaminodiphenylmethane to carry out the chain extension reaction, and finally pour it into the mold at 100 ℃ for 12 hours, and cooled naturally after demoulding to obtain a water-lubricated polyurethane composite material that can be used for bearings.

Embodiment 2

[0029] First add polytetrahydrofuran diol (MW.400) and 3% hydroxyl-terminated polydimethylsiloxane (MW.5600) mixed with toluene-2,4-diisocyanate, toluene-2,4-diisocyanate and poly The molar ratio of tetrahydrofuran diol is 2: 1, then add 0.5% catalyst dibutyltin dilaurate, pass N under 80 ℃ 2 Protection (0.1MPa) mechanical stirring, after 1.5 hours of reaction to synthesize the prepolymer, then add 3,3'-dichloro-4,4'-diaminodiphenylmethane for chain extension reaction, and finally pour it into the mold at 100 ℃ for 24 hours, and cooled naturally after demoulding to obtain a water-lubricated polyurethane composite material that can be used for bearings.

Embodiment 3

[0031] First add polyethylene glycol (MW.8000) and 5% hydroxyl-terminated polydimethylsiloxane (MW.28000) mixed with diphenylmethane diisocyanate, diphenylmethane diisocyanate and polyethylene glycol The molar ratio is 5:1, then add 0.5% catalyst dibutyltin dilaurate, pass N at 100°C 2 Protect (0.1MPa) mechanical stirring, synthesize the prepolymer after 2 hours of reaction, then add 3,3'-dichloro-4,4'-diaminodiphenylmethane to carry out the chain extension reaction, and finally pour it into the mold at 120 ℃ for 24 hours, and cooled naturally after demoulding to obtain a water-lubricated polyurethane composite material that can be used for bearings.

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PUM

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Abstract

The invention discloses a method for preparing a polyurethane composite material for water lubrication. The method comprises the following steps of: synthesizing by adopting a pre-polymerizing method, reacting by utilizing diisocyanate as a hard segment, polyether type glycol as a soft segment and dibutyltin dilaurate as a catalyst, finally adding 3, 3'-dichloro-4, 4'-diaminodiphenylmethane for chain extension, pouring the product into a mould to solidify, demoulding, and naturally cooling to obtain the material. The material has good thermal stability, improved wear resistance, excellent water lubrication performance and good self-lubrication performance, the wear resistance of the material is improved, and the service life of the material is prolonged.

Description

technical field [0001] The invention discloses a preparation method of a water-lubricated polyurethane composite material used for bearings. Background technique [0002] Polyurethane elastomer composite materials are a class of polymers that are widely used. They have high elasticity, wear resistance, high adhesion, low temperature resistance, solvent resistance, and fatigue resistance. They are known as "wear-resistant rubber". Seawater corrosion, good vibration resistance, has important applications in the navy, ships, and ship bearings. It is a polymer composite material that has developed rapidly in recent years. However, its application is greatly limited due to its thermal instability. The introduction of silicone into polyurethane by chemical copolymerization can improve the thermal stability and wear resistance of the material. The soft segment of hydroxyl-terminated polydimethylsiloxane with active functional groups at the end is selected, which can be chemically ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/61C08G18/48C08G18/32C08G18/12
Inventor 王廷梅赵盖李秀勇王齐华陈守兵
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI