Water-swellable single-component prepolymer as well as preparation method and application thereof

A water-swelling, one-component technology, applied in the field of plastic materials, can solve problems such as insufficient adhesion, and achieve the effects of preventing ultraviolet and acid-base damage, uniformly dispersing force, and preventing diseases

Pending Publication Date: 2022-04-12
优麦化学(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a water-swellable one-component prepolymer and its preparation method and application, so as to overcome the shortcomings of insufficient cohesiveness in the existing plastic track made of non-foaming polyurethane elastomer

Method used

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  • Water-swellable single-component prepolymer as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A water-swellable one-component prepolymer comprises the following synthesis method:

[0023] Step 1: Dehydrate the two-functional polyethylene glycol C at 110°C for 4-8 hours, and then keep it in a constant temperature drying container at 40°C;

[0024] Step 2: Add 451.7 parts of isomers of methylene diphenyl diisocyanate into the reaction kettle, raise the temperature to about 60-70°C, and put 548.3g of polyethylene glycol C in step 1 into the reaction kettle in batches , control the reaction temperature not to exceed 75°C, and react for 2-4 hours. At this time, the theoretical NCO of the reactant is 7.7, and the actual measured NCO=7.58, and the appearance is light yellow viscous liquid;

[0025] Step 3: Add 100 parts of propylene glycol methyl ether acetate into the reactor and stir the reactant obtained in Step 2 evenly at 40° C., and the obtained product is the reactant of Example 1.

[0026] In this embodiment, polyethylene glycol C is an adduct of ethylene oxid...

Embodiment 2

[0028] A water-swellable one-component prepolymer comprises the following synthesis method:

[0029] Step 1: Mix 109 parts of polyether polyol A and 530 parts of polyether polyol B evenly, dehydrate at 110°C for 4-8 hours, then cool and place in a constant temperature drying container;

[0030] Step 2: Add 201 parts of isomers of methylene diphenyl diisocyanate into the reactor, raise the temperature to about 60-70°C, put the polyether polyol mixture in step 1 into the reactor in batches, Control the reaction temperature not to exceed 75°C, and react for 2-4 hours. At this time, the theoretical NCO of the reactant is 5%, and the actual measured NCO=5.12. The appearance is a colorless to light yellow liquid, and the obtained product is the reactant of Example 2;

[0031] Step 3: Add 100 parts of the product of Step 2, 10 parts of liquefied methylene diphenyl diisocyanate, and 10 parts of propylene glycol methyl ether acetate into the reaction kettle and stir evenly at 40°C. The...

Embodiment 3

[0034] A water-swellable one-component prepolymer comprises the following synthesis method:

[0035] Step 1: Dehydrate 409 parts of polyether polyol D under vacuum 5 Torr below 100°C for 4-8 hours until the water content of the system reaches below 200ppm, and leave it for 24 hours to cool to room temperature;

[0036] Step 2: Add 102 parts of TDI-80 into the reactor and stir evenly, raise the temperature to 65-60°C, add the result of step 1 into the reactor, and react for 4-8 hours. The theoretical NCO of the obtained reactant is 6.9%. The NCO% is 6.83, the free TDI is 1.7%, the appearance is light yellow liquid, and the obtained product is the reactant of Example 3.

[0037] In this embodiment, polyether polyol D is a copolymerized adduct of propylene oxide and ethylene oxide starting from glycerin, propylene oxide accounts for 25% of the total substance content, and the molecular weight is about 4000.

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Abstract

The invention relates to the technical field of plastic materials, in particular to a water-swellable single-component prepolymer as well as a preparation method and application thereof. The water-swellable single-component prepolymer is mainly composed of polyol A, isocyanate B, an auxiliary agent and a solvent, and the polyol A comprises polyether polyol C containing a hydrophilic chain segment and long-chain polyether polyol D, and can also contain hydroxyl-terminated polybutadiene. The polyether polyol C is a mixture of one or more polyethers containing ethylene oxide chain segments, and the polyether polyol C is selected from polyether with the functionality less than or equal to 3 and the molecular weight of 200-6000. And the long-chain polyether polyol D is one or a mixture of a plurality of polyether polyols with the molecular weight of 1000-6000. The prepared water-swellable single-component prepolymer is high in foaming ratio, foam wraps but does not adhere to rubber particles, so that the deformation displacement of the rubber particles is smaller, and when the water-swellable single-component prepolymer is applied to a plastic track material, the overall bending fracture condition of a plastic track is good.

Description

technical field [0001] The invention relates to the technical field of plastic materials, in particular to a water-swellable one-component prepolymer and its preparation method and application. Background technique [0002] Plastic track, also known as all-weather track and field track, is usually composed of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM rubber particles or PU particles, pigments, additives, and fillers. The plastic runway has the characteristics of good flatness, high compressive strength, appropriate hardness and elasticity, and stable physical properties. It is conducive to athletes' speed and technical performance, effectively improving sports performance and reducing the rate of falls. [0003] The existing plastic track is generally made of non-foaming polyurethane elastomer, but the connection method of the plastic track produced by the traditional polyurethane elastomer manufacturing method is "point bonding", and only the polyure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/69C08L21/00C08L75/08C08L75/14
Inventor 赵辉郑可心王超李晔许龙龙
Owner 优麦化学(山东)有限公司
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