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A kind of polyurethane elastomer composite material and preparation method thereof, preparation and application of polyurethane elastomer

A polyurethane elastomer and combined material technology, applied in the field of polyurethane elastomer, can solve the problems of not being able to improve the elasticity of fitness equipment and not being environmentally friendly, and achieve the effects of shortening demoulding time and curing time, high production efficiency, and realizing room temperature curing

Active Publication Date: 2020-03-03
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The published patent CN102232092 discloses a method for producing polyurethane. This patent is used as a solvent-based two-component coating for fitness equipment. As a coating, it is only used on the surface of the substrate and mainly protects the substrate itself. And the coating is relatively thin, which cannot improve the elasticity of fitness equipment, and because it is a solvent-based coating, it is not environmentally friendly

Method used

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  • A kind of polyurethane elastomer composite material and preparation method thereof, preparation and application of polyurethane elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Curing agent components: GEP-560S 75%, Uric H-30 2%, HLBH-P 2000 3%, 3,5-dimethylthiotoluenediamine 20%, composed of bismuth isooctanoate and zinc isooctanoate The mixed catalyst 2‰ (the content of bismuth in bismuth isooctanoate is 18%, and the content of zinc in zinc isooctanoate is 22%) is mixed and then dehydrated at 100°C and below -0.1MPa to a water content of ≤500ppm to obtain a curing agent component.

[0041] Prepolymer component: take 54% of DL-1000 polyether polyol and 46% of MDI-50, and react at 75°C for 3 hours to obtain a prepolymer with an isocyanate content of 11%.

[0042] Mix the prepolymer and curing agent components in a mass ratio of 100:100. The temperature of the prepolymer is 45°C, the temperature of the curing agent is 45°C, the mold temperature is 90°C, and the mold is demolded in 10 minutes. The product is vulcanized at room temperature for 72 hours to obtain Shao A85 polyurethane elastomer.

Embodiment 2

[0044] Curing agent components: EP-330N 65%, Uric H-30 2%, HLBH-P 3000 3%, 3,5-dimethylthiotoluenediamine 30%, composed of bismuth isooctanoate and zinc isooctanoate The mixed catalyst 2‰ (the content of bismuth in bismuth isooctanoate is 18%, and the content of zinc in zinc isooctanoate is 22%) is mixed and then dehydrated at 100°C and below -0.1MPa to a water content of ≤500ppm to obtain a curing agent component.

[0045] Prepolymer component: take 54% of DL-1000 polyether polyol and 46% of MDI-50, and react at 75°C for 3 hours to obtain a prepolymer with an isocyanate content of 11%.

[0046] Mix the prepolymer and curing agent components in a mass ratio of 100:100. The temperature of the prepolymer is 45°C, the temperature of the curing agent is 45°C, the mold temperature is 90°C, and the mold is demolded in 10 minutes. The product is vulcanized at room temperature for 72 hours to obtain Shao A83 polyurethane elastomer.

Embodiment 3

[0048] Curing agent components: GEP-560S 75%, Uric H-30 2%, HLBH-P 2000 3%, methylene bis-o-chloroaniline 20%, mixed catalyst composed of bismuth isooctanoate and zinc isooctanoate 2‰ (Wherein, the content of bismuth in bismuth isooctanoate is 18%, and the content of zinc in zinc isooctanoate is 22%). After mixing, dehydrate at 100°C and below -0.1MPa until the water content is less than or equal to 500ppm to obtain the curing agent component.

[0049] Prepolymer component: take DL-2000 polyether polyol 60%, MDI-50 40%, react at 75°C for 3 hours to obtain a prepolymer with an isocyanate content of 11%.

[0050] Mix the prepolymer and curing agent components in a mass ratio of 100:100. The temperature of the prepolymer is 45°C, the temperature of the curing agent is 45°C, the mold temperature is 90°C, and the mold is demolded in 10 minutes. The product is vulcanized at room temperature for 72 hours to obtain Shao A87 polyurethane elastomer.

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Abstract

The invention discloses a polyurethane elastomer composition and its preparation method and application. It comprises an isocyanate prepolymer and a curing agent component. The prepolymer is obtained by reacting diisocyanate and polyether polyol. The curing agent component is composed of It is prepared from polyether polyol with high primary hydroxyl content, castor oil-based polyol, hydroxyl-terminated hydrogenated polybutadiene, small molecule amine crosslinking agent and catalyst. The composite material can shorten the demoulding time of the product to 10min-15min, and the strength rises quickly without the need for high-temperature secondary vulcanization. Its application is mainly for the rubber covering of fitness equipment, such as dumbbells, barbells, etc. The resilience and tear resistance of the fitness equipment using the composite material is 50% higher than that of the fitness equipment using the traditional rubber rubber under the same hardness, and it has good light and weather stability, thermal and oxygen aging resistance, Impact resistance, beating resistance and good processing performance.

Description

technical field [0001] The invention belongs to the field of polyurethane elastomers, and specifically relates to a polyurethane elastomer composite material and a preparation method thereof, and also relates to the preparation of polyurethane elastomers by using the composite material and the polyurethane elastomer can be used to prepare rubber-encapsulated fitness equipment. Background technique [0002] Along with the raising of people's living standard, body-building has become a part of a lot of people's life, as exercise or bodybuilding training with dumbbells, barbells etc. of fitness. Dumbbells or barbells for fitness are composed of dumbbells or barbell bars and dumbbell plates of the same weight on both sides. More and more dumbbells or barbell plates used in gyms are made of steel inside and covered with rubber or polyurethane on the outside, the purpose of which is to protect the floor and other fitness facilities in the gym. Traditional rubber coating materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/69C08G18/67C08G18/66C08G18/48C08G18/32C08G18/10C08G18/76
CPCC08G18/10C08G18/324C08G18/38C08G18/3857C08G18/48C08G18/4829C08G18/6696C08G18/698C08G18/7671
Inventor 罗建勋王凯齐旺顺胡兵波
Owner WANHUA CHEM GRP CO LTD
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