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High-wear-resistance organic silicon modified polyurethane elastomer and preparation method thereof

A polyurethane elastomer and polyurethane prepolymer technology, applied in the field of polyurethane application, can solve the problems of increasing compatibility, limited improvement of wear resistance, and not greatly increasing reaction temperature and reaction time.

Pending Publication Date: 2022-03-04
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method to improve the wear resistance of polyurethane elastomers is to introduce fillers or anti-wear additives, such as the introduction of inorganic fillers, organic fillers such as polytetrafluoroethylene powder, and the introduction of additive silicone products. There are obvious defects, not only will greatly reduce the mechanical strength of the elastomer, cause settlement, affect the specific gravity of the elastomer, change the appearance of the elastomer, etc., the most important thing is that the improvement of the wear resistance is limited
In recent years, with the abundance of reactive silicone products, research on its application in the preparation of wear-resistant polyurethane elastomers has gradually attracted attention. At the same time, the problem of silicone migration has been avoided, but how to do so without greatly increasing the reaction temperature and reaction time Under such circumstances, it is one of the difficult problems in the industry to accelerate the reaction of organic silicon raw materials with lower reactivity and greater steric hindrance into the main chain of polyurethane, increase compatibility and minimize its impact on the performance of polyurethane elastomers one

Method used

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  • High-wear-resistance organic silicon modified polyurethane elastomer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0037] A highly wear-resistant organosilicon-modified polyurethane elastomer and a preparation method thereof, comprising the following steps:

[0038] (1) Preparation of Silicone Modified Polyurethane Prepolymer

[0039] Step 1: React 11.3g of PE-2020, 45.2g of hydroxyl-terminated polysiloxane with a hydroxyl value of 74.8mgKOH / g, 4.5g of KH560, and 43.5g of TDI-100 at 85°C for 40min;

[0040] Step 2: After the isocyanate content reaches the design value of 18%, the temperature of the reaction system is lowered to 60°C, and after adding 133.7g of PE-2020, the temperature is raised to 85°C again, and the reaction is continued for 180 minutes under the same reaction conditions. The vacuum degree for removing air bubbles is ≤-0.095MPa, and an organosilicon-modified polyurethane prepolymer with an isocyanate content of 4.3% is obtained.

[0041] (2) Preparation of silicone-modified polyurethane elastomer

[0042] 100g of polyurethane prepolymer and 12.5g of melted MOCA were mix...

Embodiment 2

[0044] A highly wear-resistant organosilicon-modified polyurethane elastomer and a preparation method thereof, comprising the following steps:

[0045] (1) Preparation of Silicone Modified Polyurethane Prepolymer

[0046] Step 1: React 46.0g of PE-4040, 20.0g of hydroxyl-terminated polysiloxane with a hydroxyl value of 28mgKOH / g, 1.0g of KH550, and 34.0g of TDI-100 at 87°C for 60 minutes;

[0047]Step 2: After the isocyanate content reaches 15% of the design value, the temperature of the reaction system is lowered to 65°C, and after adding 22.9g of PE-4040, the temperature rises to 85°C again, and the reaction is continued for 180 minutes under the same reaction conditions. The vacuum degree for removing air bubbles is ≤-0.095MPa to obtain a silicone-modified polyurethane prepolymer with an isocyanate content of 3.0%.

[0048] (2) Preparation of silicone-modified polyurethane elastomer

[0049] 100g of polyurethane prepolymer and 8.6g of melted MOCA were mixed evenly at 85°C...

Embodiment 3

[0051] A highly wear-resistant organosilicon-modified polyurethane elastomer and a preparation method thereof, comprising the following steps:

[0052] (1) Preparation of Silicone Modified Polyurethane Prepolymer

[0053] The first step: 9.6g of PE-2020, 22.4g of hydroxyl-terminated polysiloxane with a hydroxyl value of 112.2mgKOH / g, 1.7g of 1076 antioxidant, 2.2g of KH560, 54.4g of MDI-100 and 13.6g of liquefied MDI was reacted at 75°C for 60min;

[0054] Step 2: After the isocyanate content reaches 20% of the design value, the temperature of the reaction system is lowered to 60°C, and after adding 80.6g of PE-2020, the temperature is raised to 85°C again, and the reaction is continued for 120 minutes under the same reaction conditions. The vacuum degree for removing air bubbles is ≤-0.095 MPa to obtain a silicone-modified polyurethane prepolymer with an isocyanate content of 9.0%.

[0055] (2) Preparation of silicone-modified polyurethane elastomer

[0056] 100g of polyur...

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Abstract

The invention relates to a high-wear-resistance organic silicon modified polyurethane elastomer and a preparation method thereof, and belongs to the technical field of polyurethane application. According to the high-wear-resistance organic silicon modified polyurethane elastomer disclosed by the invention, polyester polyol, reaction type organic silicon, isocyanate, a silane coupling agent and an antioxidant are used as raw materials to carry out pre-reaction, and then the polyester polyol is supplemented to prepare a polyurethane prepolymer; and reacting the polyurethane prepolymer with a chain extender to obtain the high-wear-resistance organic silicon modified polyurethane elastomer. The polyurethane elastomer disclosed by the invention not only has excellent mechanical strength, but also has relatively high wear resistance, and meets the requirements of the market on the high-wear-resistance polyurethane elastomer; meanwhile, the invention provides a simple and convenient preparation method.

Description

technical field [0001] The invention relates to a highly wear-resistant organosilicon-modified polyurethane elastomer and a preparation method thereof, belonging to the technical field of polyurethane application. Background technique [0002] Polyurethane is a polymer synthetic material with properties between rubber and plastic. Because of its excellent wear resistance, mechanical properties and resilience properties, it has become one of the fastest-growing polymer materials. In recent years, with the in-depth application of polyurethane elastomers and the improvement of industry requirements, the wear resistance of mining sieve plates, grinding machine linings, industrial casters, grinding blocks, conveyor belts and other wear-resistant products made of polyurethane elastomers needs to be improved urgently to meet A higher level of use is required. The traditional method to improve the wear resistance of polyurethane elastomers is to introduce fillers or anti-wear addit...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/61C08G18/42C08G18/38C08G18/32C08G18/28C08G18/12
CPCC08G18/61C08G18/4238C08G18/289C08G18/3893C08G18/6633C08G18/12C08G18/42C08G18/3814C08G18/3206
Inventor 房玉俊盖志科韩胜奎王维龙
Owner SHANDONG INOV POLYURETHANE
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