Multi-purpose high-modulus polyurethane resin and application thereof

Abstract

The invention discloses a multi-purpose high-modulus polyurethane resin and its application. Its components are calculated according to the total mass percentage of the reaction system: including 14%-16% of diphenylmethane-4,4-diisocyanate; polyol composition 6%-8%; small molecule chain extender 5%-5.5%; N,N-dimethylformamide solvent 68%-72%; end-capping agent 0.03%-0.1% and auxiliary agent 1%-2%. The present invention uses mixed polyols and mixed chain extenders to reduce the crystallinity of the system, uses different proportions of polyol compositions and chain extenders to adjust the slender and upright cell structure and superior color development, and is modified by adding polyether Additives make the cell structure more uniform, slender and upright, and feel more comfortable. The polyurethane resin prepared by the invention has the characteristics of high modulus, excellent color development, uniform, slender and upright cells, good anti-curling performance, fast solidification, fast water washing, etc., and has wide application range.

Description

technical field [0001] The invention belongs to the technical field of polyurethane synthetic materials, in particular to a multi-purpose high-modulus polyurethane resin which can be used for air-permeable leather, mirror leather and ordinary super-hard leather, and belongs to the technical field of chemical industry. Background technique [0002] Polyurethane resin is widely used in synthetic leather, mainly in clothing, shoes, bags, furniture, automobiles and other fields. With the increasing market demand, the rapid development of polyurethane resin for leather shows an upward trend, so higher requirements are put forward for the development and update of technology. [0003] Although natural leather has advantages in appearance, air permeability and water absorption, the application range of natural leather is also limited due to the influence of factors such as environmental protection and ecological balance, as well as the limitations of its physical properties. The p...

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Problems solved by technology

[0003] Although natural leather has advantages in appearance, air permeability and water absorption, the application range of natural leather is also limited due to factors such as environmental protection and ecological balance, as well as the limitations of its physical properties.

The polyurethane resins currently on the market have certain limitations in the scope of application, and are limited to a specific process or a certain type of product in the process of leather making, resulting in a wide variety of raw materials and easy to confuse

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