High-hardness polyurethane elastomer and preparation method thereof

A polyurethane elastomer, high-hardness technology, applied in the field of materials, can solve the problems that the product cannot be produced and the process is not very mature, and achieve the effects of tensile strength and wear improvement, high bacteria resistance, and high hydrolysis resistance.

Inactive Publication Date: 2020-06-12
苏州希倍优辊轮有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, high-hardness polyurethane elastomers used in submarine protection devices have not been produced on the market, and the technology is not very mature, and some products with specific requirements cannot be produced.

Method used

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  • High-hardness polyurethane elastomer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A component is a prepolymer component, including by weight:

[0033] Liquid MID50: 150 parts

[0034] Polycarbonate polyol: 80 parts

[0035] Polytetrahydrofuran polyol: 80 parts;

[0036] Component B is a polyol component, including by weight:

[0037] Polycarbonate polyol: 80 parts

[0038] Chain extender MOCA: 70 parts

[0039] Silicone surfactant: 0.3 parts

[0040] Color paste: 0.5 parts

[0041] Organotin catalyst: 0.3 parts

[0042] Toughener: 0.1 parts.

[0043] The preparation steps of high hardness polyurethane elastomer of the present invention comprise as follows:

[0044] (1) Preparation of component A: put polycarbonate polyol and polytetrahydrofuran polyol in a reaction kettle, first dehydrate and vacuumize at 115°C for 30 minutes, cool down to 55°C, add liquid MID50, first freely heat up and then keep warm for reaction 2- After 3 hours, control the content of NCO to be about 20% relative to component B, and discharge it, and keep it sealed for f...

Embodiment 2

[0048] A component is a prepolymer component, including by weight:

[0049] Liquid MID50: 100 parts

[0050] Polycarbonate polyol: 50 parts

[0051] Polytetrahydrofuran polyol: 50 parts;

[0052] Component B is a polyol component, including by weight:

[0053] Polycarbonate polyol: 50 parts

[0054] Chain extender MOCA: 60 parts

[0055] Silicone surfactant: 0.2 parts

[0056] Color paste: 0.2 parts

[0057] Organotin catalyst: 0.2 parts

[0058] Toughener: 0.1 parts.

[0059] The preparation steps of high hardness polyurethane elastomer of the present invention comprise as follows:

[0060] (1) Preparation of component A: put polycarbonate polyol and polytetrahydrofuran polyol in a reaction kettle, first dehydrate and vacuumize at 110°C for 40 minutes, cool down to 50°C, add liquid MID50, first freely heat up and then keep warm for reaction 2- After 3 hours, control the content of NCO to be about 20% relative to component B, and discharge it, and keep it sealed for f...

Embodiment 3

[0064] A component is a prepolymer component, including by weight:

[0065] Liquid MID50: 200 parts

[0066] Polycarbonate polyol: 100 parts

[0067] Polytetrahydrofuran polyol: 100 parts;

[0068] Component B is a polyol component, including by weight:

[0069] Polycarbonate polyol: 100 parts

[0070] Chain extender MOCA: 80 parts

[0071] Silicone surfactant: 0.5 parts

[0072] Color paste: 1 part

[0073] Organotin catalyst: 0.5 parts

[0074] Toughening agent: 0.2 parts.

[0075] The preparation steps of high hardness polyurethane elastomer of the present invention comprise as follows:

[0076] (1) Preparation of component A: put polycarbonate polyol and polytetrahydrofuran polyol in a reaction kettle, first dehydrate and vacuumize at 115°C for 40 minutes, cool down to 60°C, add liquid MID50, first freely heat up and then keep warm for reaction 2- After 3 hours, control the content of NCO to be about 20% relative to component B, and discharge it, and keep it sealed ...

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Abstract

The invention discloses a high-hardness polyurethane elastomer and a preparation method thereof, and belongs to the technical field of materials. Polycarbonate polyol and polyether polyol are used assoft segment parts of the polyurethane elastomer; diphenylmethane diisocyanate is used as a hard segment component of the high-hardness polyurethane elastomer; the high-hardness polyurethane elastomerprepared from the elastomer material has the advantages of high impact resistance, high tensile strength, high hydrolysis resistance, high bacterial resistance and the like, the strength of the polyurethane elastomer can reach 85D (shore) hardness, and the problem of high price required by import is solved by the formulation and process production. The ratio of polycarbonate polyol to polyether polyol is changed and liquid MDI is utilized to achieve the hardness of 85D, and the tensile strength and wear resistance are greatly improved in comparison with the material in the prior art.

Description

technical field [0001] The invention relates to a high-hardness polyurethane elastomer and a preparation method thereof, belonging to the field of material technology. Background technique [0002] The submarine cable protective sleeve, namely the bend limiter, is a polyurethane material with a hardness of Shore 85D applied to the protection device of the submarine cable shell. It mainly uses the excellent mechanical properties such as high hardness, high tensile strength and ultra-high impact resistance of the material to limit the bending of the submarine cable and the damage to the submarine cable by the harsh environment of the seabed, so as to protect the cable. On the one hand, there are polycarbonate-based branched chains in the raw material, so it has excellent hydrolysis resistance; on the other hand, its ultra-high hardness can resist the impact of the seabed environment. [0003] In the existing technology, high-hardness polyurethane elastomers used in submarine ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/44C08G18/48C08G18/32H02G9/00H02G9/06
CPCC08G18/3814C08G18/4018C08G18/44C08G18/4854C08G18/6618H02G9/00H02G9/06
Inventor 王雨露李留罐刘勇
Owner 苏州希倍优辊轮有限公司
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