Solvent-resistant polyurethane composite and preparation method thereof

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...

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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

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