Aqueous binder for vulcanized shoe and preparation method of aqueous binder

Abstract

The invention discloses an aqueous binder for a vulcanized shoe and a preparation method of the aqueous binder. The aqueous binder comprises a binder component and a curing agent component. The binder component comprises, by weight, 20-60 parts of aqueous polyurethane dispersoids and 40-80 parts of natural emulsion. An assistant comprises 1-5 parts of tackifying resin, 0.2-0.5 part of a surface active agent, 0.02-0.06 part of a defoaming agent, 0.1-0.3 part of a wetting agent, 1.0-3.0 parts of vulcanization grinding bodies, 3-9 parts of water dispersive closed aliphatic polyisocyanate and 0.02-0.05 part of a thickening agent. The curing agent component comprises, by weight, 20-60 parts of water dispersive aliphatic polyisocyanates, 20-60 parts of aziridine cross-linking agents and 10-30 parts of co-solvents. The aqueous binder is used for manufacturing the vulcanized shoe, good adhesion and water resistance can be obtained, and meanwhile environment protection and physical and psychological health of workers are facilitated due to the characteristic of low odor.

Description

technical field [0001] The invention relates to an adhesive, in particular to a water-based two-component adhesive for low-odor vulcanized shoes and a preparation method thereof. Background technique [0002] my country is the world's largest shoe producer, consumer and exporter. In recent years, my country's annual production of various footwear has exceeded 15 billion pairs. According to the classification of the manufacturing process, it is mainly divided into two categories: cold-bonded shoes and vulcanized shoes. The so-called cold-bonded shoes refer to the soles and vamps that have been brushed, dried, pasted, and finally cooled to establish bonding strength. shoe ; while vulcanized shoes are made by brushing the sole and upper, drying, laminating, and vulcanizing under a certain temperature and pressure. shoe . In terms of output, most of the footwear products produced in my country each year belong to the category of cold sticky shoes, such as Nike, Adidas, Anta's ...

AI Technical Summary

Problems solved by technology

Solvent-based products use organic solvents to dissolve high-molecular materials such as natural rubber and synthetic rubber, and then use them with vulcanizing agents, commonly known as gasoline rubber. During use, a large amount of toxic solvents will be emitted into the surrounding environment, which will not only directly damage the health of employees. Physical and mental health, increase fire safety hazards, and also have a huge impact on the ecosystem

However, the water-based vulcanizates currently on the market use natural latex directly with a vulcanizing agent. Ammonia is added to the natural latex as a stabilizer. The strong irritating smell of ammonia will also have adverse effects on human health during use. Natural latex can only be well bonded to ordinary canvas, but not suitable for hard-to-stick shoe materials such as genuine leather and synthetic leather

[0004] In view of the solvent emission problem of solvent-based products and the limitations of natural latex, some researchers have developed a compound product of water-based polyurethane emulsion and natural latex, which is used together with a vulcanizing agent. Since the vulcanizing agent only has a cross-linking effect on natural latex, but does not have any cross-linking reaction on water-based polyurethane, the cross-linking of the film is not sufficient to obtain a good bonding effect, and there is still no problem with the bonding applicability of various shoe materials. get well resolved

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