Hot melt adhesive containing water-soluble nanoscale silica sol and preparation method thereof

Abstract

The invention discloses a hot melt adhesive containing a water-soluble nanoscale silica sol and a preparation method thereof. The hot melt adhesive comprises the following raw materials by weight part: 30-40 of a thermoplastic polyurethane elastomer, 30-35 of isotactic polypropylene resin, 13-18 of chlorinated EVA, 33-38 of ethylene-ethyl acrylate resin, 30-35 of the water-soluble nanoscale silica sol, 15-17 of mixed powder, 25-35 of kaolin, 1.5-1.7 of 4, 4-methylenebis(2, 6-di-tert butylphenol), 0.7-0.9 of vinyl triethoxy silane, 0.2-0.4 of dibutyl phthalate, and 2.5-3.0 of triethanolamine. The hot melt adhesive provided in the invention has a reasonable formula, adopts the thermoplastic polyurethane elastomer, the isotactic polypropylene resin, the chlorinated EVA and the ethylene-ethyl acrylate resin as main materials together, their respective excellent performances are combined. Also, the mixed powder is added in the raw materials, so that the softening point temperature of the prepared hot melt adhesive is raised. Meanwhile, the water-soluble nanoscale silica sol and kaolin are added to increase the bonding strength of the hot melt adhesive, which can have good fluidity. The hot melt adhesive disclosed in the invention has the advantages of environmental protection, safety, weatherability and low cost.

Description

technical field [0001] The invention relates to the field of polymer material processing, in particular to a hot melt adhesive containing water-soluble nano-scale silica sol and a preparation method thereof. Background technique [0002] Hot melt adhesive is a solvent-free solid adhesive with thermoplastic resin as the main component. Because hot melt adhesive has fast bonding speed, non-toxicity, simple bonding process and good bonding strength and flexibility, etc. Advantages, it can bond various materials such as wood, paper, fiber, metal, plastic stools, and has a wide range of applications, especially in the fiber industry, packaging industry and binding industry, but most hot melt adhesives are used Polyester, polyamide and other hot-melt resins, due to the poor strength and elasticity of polyester hot-melt adhesives, can not withstand too much external force, and because of the high melting point and hardness of polyamide hot-melt adhesives, so in use aspects are res...

AI Technical Summary

Problems solved by technology

[0002] Hot melt adhesive is a solvent-free solid adhesive with thermoplastic resin as the main component. Because hot melt adhesive has fast bonding speed, non-toxicity, simple bonding process and good bonding strength and flexibility, etc. Advantages, it can bond various materials such as wood, paper, fiber, metal, plastic stools, and has a wide range of applications, especially in the fiber industry, packaging industry and binding industry, but most hot melt adhesives are used Polyester, polyamide and other hot-melt resins, due to the poor strength and elasticity of polyester hot-melt adhesives, can not withstand too much external force, and because of the high melting point and hardness of polyamide hot-melt adhesives, so in use Restricted