Polyurethane for solvent-free foot pad leather and preparation method thereof

Abstract

The invention relates to the field of polyurethane, and particularly discloses polyurethane for solvent-free foot pad leather and a preparation method of the polyurethane. The invention discloses polyurethane for solvent-free foot pad leather. The polyurethane is prepared from a component A, a component B and a component C, the component A is prepared from the following raw materials: PBPHA polyhydric alcohol, a chain extender, a flatting agent, a foam stabilizer and a pore opening agent; the component B is prepared from the following raw materials: aromatic diisocyanate and polyester polyol; the component C comprises a catalyst; and the molar ratio of the sum of the hydroxyl groups in the component A and the hydroxyl groups in the component B to the isocyanato in the component B is 1: 1. The preparation method comprises the following steps: S1, respectively preparing the component A, the component B and the component C; s2, mixing and stirring the component A, the component B and the component C to obtain the product. The product provided by the invention can be used for producing the foot pad leather, and has the advantage of reducing environmental pollution during production and use of the product.

Description

technical field [0001] The present application relates to the field of polyurethane, more particularly, it relates to a polyurethane for solvent-free footpad leather and a preparation method thereof. Background technique [0002] Polyurethane is a material made of liquid isocyanate and liquid polyether or glycol polyester polycondensation, which is commonly used in different fields such as footbed leather, coatings and adhesives. [0003] The polyurethane used for foot pad leather is soft to the touch and has a strong leather-like appearance, which is the most ideal substitute for natural leather, and the polyurethane used for foot pad leather is generally made of solvent-based polyurethane through a dry production process or a wet production process. have to. [0004] However, the solvent-based polyurethane resin contains a large amount of toxic and harmful chemical solvents such as dimethylformamide and toluene. During the production and use of the footpad leather, a larg...

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Problems solved by technology

[0004] However, solvent-based polyurethane resin contains a large amount of toxic and harmful chemical solvents such as dimethylformamide and toluene. During the production and use of foot pad leather, a large amount of chemical solvents will volatilize into the surrounding environment, which will easily cause environmental pollution.

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