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Thermoplastic polyurethane elastomer composition, and preparation method and application thereof

A technology of thermoplastic polyurethane and elastomer, applied in the field of thermoplastic polyurethane elastomer, can solve the problems of complex and difficult production process, high processing temperature and difficult operation, high price and cost, and achieve the effects of reducing wear, improving heat resistance and increasing strength

Active Publication Date: 2019-05-07
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the above-mentioned methods all have the disadvantages of complex and difficult production process, high processing temperature and difficult operation, high price and cost, or products with shrinkage defects and general performance, which cannot be widely used in the field of high-end compression performance products.

Method used

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  • Thermoplastic polyurethane elastomer composition, and preparation method and application thereof
  • Thermoplastic polyurethane elastomer composition, and preparation method and application thereof
  • Thermoplastic polyurethane elastomer composition, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In Example 1, the thermoplastic polyurethane elastomer was synthesized by using the material dosage formula of isocyanate index R=1.20: 350g PIBA2000 polyester polyol, 118.3g ethylene glycol chain extender, 2g 2,6-di-tert-butyl-4-methyl Mix base phenol, 8g monocarbodiimide additive, 5ppm phosphoric acid catalyst at 65°C, add 531.7g MDI isocyanate, stir quickly until the temperature rises to 95°C, stop stirring, gel for 1.5min, and quickly pour into the mold In the process of aging reaction at 110°C for 10h, then crushed, injection molded test pieces of different shapes, the injection molding temperature was 215°C, the injection molded test pieces were annealed in a 90°C oven for 12h, and then taken out and placed in a standard constant temperature and humidity laboratory (23°C, 50% humidity) After standing for 24 hours, cut out different shapes of specimens for testing and evaluation.

[0052] The elevator roller made of the thermoplastic polyurethane elastomer of this ...

Embodiment 2

[0054] In Example 2, the material dosage formula of isocyanate index R=1.30 is adopted to synthesize thermoplastic polyurethane elastomer, 700g PCBA5000 polyester polyol, 83.6g hexanediol chain extender, 15g tetrakis (4-hydroxyl 3,5-tert-butyl Phenyl propionate) pentaerythritol ester, 1g polycarbodiimide additive, 1ppm stannous octoate catalyst, stir and mix evenly at 75°C, add 216.4gMDI isocyanate, stir rapidly until the temperature rises to 100°C, stop stirring, and the gel is 1.0 min, quickly poured into the mold, aged and reacted at 90°C for 16h, then crushed, injection molded test pieces of different shapes, the injection temperature was 200°C, and the injection molded test pieces were annealed in an oven at 80°C for 12h, then taken out and placed in a standard After placing in a constant temperature and humidity laboratory (23°C, 50% humidity) for 24 hours, cut out different shape specimens for testing and evaluation.

[0055] The high-pressure hydraulic seal made of the...

Embodiment 3

[0057] In Example 3, the thermoplastic polyurethane elastomer was synthesized by using the material dosage formula of isocyanate index R=1.35. 550g PFBA1000 polyester polyol, 101.9g HQEE-L chain extender, 5g 2,6-di-tert-butyl-4-methanol Mix base phenol, 6g polycarbodiimide additive, and 5ppm phosphoric acid catalyst at 65°C to mix evenly, add 348.1g MDI isocyanate, stir quickly until the temperature rises to 100°C, stop stirring, gel for 1.5min, and quickly pour into the mold 100°C aging reaction for 12 hours, then crushed, injection molded test pieces of different shapes, the injection molding temperature was 210°C, the injection molded test pieces were annealed in a 90°C oven for 12 hours, and then taken out and placed in a standard constant temperature and humidity laboratory (23°C, 50% humidity) After standing for 24 hours, cut out different shapes of specimens for testing and evaluation.

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Abstract

The invention relates to a thermoplastic polyurethane elastomer (TPU) composition and a preparation method thereof. The TPU composition has very excellent compression strength, compression permanent deformation, wear resistance and fatigue resistance. The TPU composition mainly comprises the following raw materials: (1) 33-72 parts by mass of polyhydric alcohol, (2) 3-20 parts by mass of a chain extender, and (3) 18-56 parts of diisocyanate. The TPU composition can be prepared by a one-step method. The TPU provided by the invention is suitable for high-pressure hydraulic sealing elements, high-performance elevator rollers, escalator rollers, lifting door rollers and the like.

Description

technical field [0001] The invention relates to the technical field of thermoplastic polyurethane elastomers. It specifically relates to a thermoplastic polyurethane elastomer with high compressive strength, low compression set, excellent wear resistance and fatigue resistance, and its preparation method and application. Background technique [0002] Thermoplastic polyurethane elastomer (TPU) is a multi-block polymer containing soft segments and hard segments. The soft segment is provided by polyol chains, and the hard segment is provided by isocyanate and chain extender chain unit. This feature endows TPU with excellent elasticity, high mechanical strength, low compression set, wear resistance and fatigue resistance, etc., so it is important and widely used in the industrial field. [0003] At present, the main goal of improving the compressive strength of TPU and reducing the compression set performance is to increase the physical or chemical crosslinking point. The speci...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/32C08G18/42C08G63/199C08G63/42C08G63/672C08G63/85
Inventor 孙鹏举黄岐善
Owner WANHUA CHEM GRP CO LTD
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