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Improving method of water resistance of polyurethane material

A polyurethane material and water resistance technology, applied in the field of improving the water resistance of polyurethane materials, can solve the problems of high equipment, technology and capital requirements, poor effect, etc. Effect

Inactive Publication Date: 2014-04-09
HANGZHOU SHUNLONG RUBBER ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Although the first and second methods can fundamentally solve the hydrolysis resistance of polyurethane, because they need to start with the polymerization reaction, the required equipment, technology and capital requirements are relatively high, which cannot be solved by general application manufacturers.
[0016] The third method is easy to apply, but the effect is poor when used alone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0074] Embodiment 4: adopt polyurethane solid raw rubber to produce polyurethane products

[0075] Ingredients:

[0076] components Polyurethane raw rubber PTFE powder polycarbodiamine Silica SR350 DCP parts by weight 100 20 1 20 20 2

[0077] Among them, the particle size of PTFE micropowder is 1-10 microns.

[0078] method:

[0079] The addition method is exactly the same as the mixing procedure of general-purpose rubber, and will not be repeated here.

[0080] Sample performance:

[0081] project Hardness (SHA) Tensile strength MPa Elongation at break% Add PTFE 94 22 170 Without PTFE 93 24 175

[0082] Performance after immersion in water (70 hours at room temperature)

[0083] project Hardness (SHA) Tensile strength MPa Elongation at break% Add PTFE 94 22 168 Without PTFE 92 23 170

[0084] Performance after immersion in water (50℃×70 hours)

[0085] ...

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Abstract

The invention discloses an improving method of water resistance of a polyurethane material, belonging to the technical field of material modifying methods. The method is to add 5-40 parts by weight of polytetrafluoroethylene micro powder into every 100 parts by weight of the polyurethane materials. According to the improving method disclosed by the invention, the polytetrafluoroethylene micro powder is added into a polyurethane material system, so that not only can mechanical performance of the polyurethane be kept, but also hydrolysis resistance of the polyurethane can be improved, and therefore, the application field of the polyurethane material is expanded.

Description

technical field [0001] The invention belongs to the technical field of material modification methods, and in particular relates to a method for improving the water resistance of polyurethane materials. Background technique [0002] Polyurethane is a synthetic material with excellent performance. Compared with other elastomers, it has extremely high mechanical properties, such as extremely high tensile strength (up to 50MPa or more), high elasticity and high elongation under high hardness. , much higher than the wear resistance of general-purpose rubber, these properties make polyurethane suitable for engineering elastomers, such as papermaking, steel rolling rubber roll cladding, solid tires, wear-resistant linings, paper shoe pressure sleeves and high-pressure sealing fields. [0003] Since the polyurethane elastomer contains chemical bonds and groups that are easy to hydrolyze, such as ether bonds, ester bonds, isocyanate bonds, hydroxyl groups, and carboxyl groups, the hy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/62C08L75/04C08L27/18
CPCC08L75/04C08L27/18
Inventor 韩盛才
Owner HANGZHOU SHUNLONG RUBBER ROLL
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