Solvent-resistant polyurethane composite and preparation method thereof

A composite material and polyurethane technology, applied in the field of organic compounds, can solve the problems of poor mechanical properties and solvent resistance of polyurethane materials, limit the use of polyurethane materials, and adverse effects of production operations, etc., to achieve good dynamic mechanical properties and slow down damage , the effect of increasing the crosslink density

Inactive Publication Date: 2019-08-13
山西科灜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Rubber rollers are commonly used in the production of colored steel sheets and silicon steel sheets and in the printing industry to coat coatings or inks. The solvent resistance of ordinary polyurethane materials, especially polar solvents, is relatively poor. The existing solvent-resistant polyurethane materials are polyadipate , toluene diisocyanate is the main reaction, there are prepolymer method and one-step method, the operation process has the influence of free toluene diisocyanate on the environment, and the mechanical properties and solvent resistance of the polyurethane material prepared by the one-step method are not good, and the prepolymer method During the process of extracting polyurethane, the viscosity of the system is relatively high, and the proportion of reaction components is relatively large, which will adversely affect the production operation
In recent years, there is also a synthesis process of polyadipate polyol, polysuccinate polyol and diphenylmethane diisocyanate (pure MDI). The reaction is relatively violent, and the fillers added are limited, so casting machines can only be used. Operation, manual and reactor pouring process cannot be realized, which limits the use of polyurethane materials in the field of solvent resistance to a certain extent

Method used

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  • Solvent-resistant polyurethane composite and preparation method thereof
  • Solvent-resistant polyurethane composite and preparation method thereof
  • Solvent-resistant polyurethane composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0039] 1 Preparation of solvent-resistant polyurethane composites.

[0040] 1.1 Preparation of Component A

[0041] Weigh 300g of polyadipate polyol (weight average molecular weight: 2000Mw) in component A in a container with agitator, polysuccinate polyol (weight average molecular weight: 2000Mw) in component A 700g, 0.5g of benzoyl chloride in component A, component B: 300g of dimethoxyethyl phthalate, component C: 150g of molecular sieve, 0.3g of antioxidant in component E, the antioxidant The agent is a phenolic antioxidant, specifically antioxidant-264, chemical name 2,6-di-tert-4-methylphenol, stirred in an environment of 80-100°C, and the mixed material is uniformly dispersed using a colloid mill.

[0042]Weigh 1000g of the dispersed mixed material in a closed container with a stirrer and vacuum dehydrate it for 2.5 hours under the environment of 115±5°C. The vacuum degree of dehydration is between 0.095-0.01mpa. When the temperature is lowered below 60°C, add 200g of...

Embodiment example 2

[0055] 1 Preparation of solvent-resistant polyurethane composites.

[0056] 1.1 Preparation of Component A

[0057] Weigh polyadipate polyol (weight average molecular weight 2000Mw) in A component in a container with stirrer, 500g, polysuccinate polyol (weight average molecular weight 2000Mw) 500g, benzoyl chloride / Phosphoric acid mixture 0.5g, B component dimethoxyethyl phthalate 100g, C component: inorganic filler white carbon black 145g, titanium dioxide 5g, E component antioxidant 0.3g (same as

Embodiment 1

[0058] Example 1), stirring in an environment of 80-100° C., and using a colloid mill to evenly disperse the mixed material.

[0059] Weigh 1000g of the dispersed mixed material in a closed container with a stirrer and vacuum dehydrate it for 2.5 hours under the environment of 115±5°C. The vacuum degree of dehydration is between 0.095-0.01mpa. When the temperature drops below 60°C, add 232g of F component (F component is liquefied diphenylmethane diisocyanate), slowly heat to 80±5°C, and keep it warm for 1.5 hours, which is the prepared prepolymer. Analyze the prepolymer The NCO% content of the body can be used.

[0060] 1.2 Preparation of component B

[0061] Weigh component D in a closed container with a stirrer: butanediol 31g, trimethylolpropane 11g, component B: dimethoxyethyl phthalate 300g, component E: catalyst 0.5g , defoamer 0.5g (same as embodiment 1), antioxidant 0.5g (same as embodiment 1), catalyzer is a lead catalyst, vacuum dehydration 2.5 hours under the env...

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Abstract

The invention discloses a solvent-resistant polyurethane composite. The composite is prepared from two components, namely the primary component and the secondary component. The primary component comprises an ingredient A, an ingredient B, an ingredient C, an ingredient E and an ingredient F, and the secondary component comprises an ingredient D, the ingredient B, the ingredient E and the ingredient F, wherein the ingredient A refers to a mixture of polyols and retarders, the ingredient B refers to a plasticizer, the ingredient C refers to inorganic filler, the ingredient D refers to a chain extender, the ingredient E refers to a mixture of a defoamer, an antioxidant and a catalyst auxiliary agent, and the ingredient F refers to polyisocyanate. The invention further discloses a preparationmethod of the solvent-resistant polyurethane composite, the service life of a rubber roll made from the solvent-resistant polyurethane composite is double of that of a rubber roll made from toluene diisocyanate, the processing performance of the rubber roll made from the solvent-resistant polyurethane composite is improved obviously, and the composite has a wider operating environment and better mechanical processing performance.

Description

technical field [0001] The invention belongs to the field of organic compounds, and in particular relates to a solvent-resistant polyurethane composite material and a production process. Background technique [0002] Rubber rollers are commonly used in the production of colored steel sheets and silicon steel sheets and in the printing industry to coat coatings or inks. The solvent resistance of ordinary polyurethane materials, especially polar solvents, is relatively poor. The existing solvent-resistant polyurethane materials are polyadipate , toluene diisocyanate is the main reaction, there are prepolymer method and one-step method, the operation process has the influence of free toluene diisocyanate on the environment, and the mechanical properties and solvent resistance of the polyurethane material prepared by the one-step method are not good, and the prepolymer method In the process of taking polyurethane, the viscosity of the system is relatively high, and the proportio...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/42C08G18/32C08G18/12C08K5/12C08K7/24C08K5/13C08K3/36C08K3/22
CPCC08G18/12C08G18/3206C08G18/4202C08G18/6644C08G18/7671C08K3/22C08K3/36C08K5/12C08K5/13C08K7/24C08K2003/2241
Inventor 白绍敏程立惠孙奉瑞王文锐朱岳郭秀鹏张文新赵廷午贾林才
Owner 山西科灜科技有限公司
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