Preparation method for polyurethane adhesive with high initial bonding strength for fire hose

A technology of initial bonding strength and polyurethane adhesive, which is applied in the field of polyurethane adhesive preparation, can solve the problems of degumming of braided layer and polyurethane inner tube, difficult bonding of polyester filaments, and low bonding strength, and achieves difficult degumming and melt index High, strong bonding effect

Inactive Publication Date: 2015-07-01
洛阳吉明化工有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difficulty of bonding polyester filaments, the existing adhesives for fire hoses have low bonding strength, which is likely to cause degumming of the braided layer and the polyurethane inner tube, and the adhesives on the market are all solution-processed, and the adhesive needs to be dissolved in a solvent. For a certain period of time, the production cycle is long, the transportation is inconvenient, and it is easy to cause environmental pollution

Method used

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Embodiment Construction

[0016] Production of polyurethane adhesives for fire hoses, the components of which are: 89.5% polycaprolactone with an average molecular weight of 4000, 1.3% 1,4-butanediol, 8.4% diphenylmethane diisocyanate, naphthene Bismuth acid catalyst 0.2%, antioxidant 0.2%, light stabilizer 0.2%, ultraviolet absorber 0.2%. Among them, polycaprolactone, 1,4-butanediol and diphenylmethane diisocyanate are the reaction components, and the rest are compounding agents. The synthesis is carried out according to the following conditions and steps: add the measured polycaprolactone, 1,4-butanediol, antioxidant, light stabilizer, and ultraviolet light absorber to the reaction kettle, heat it to 120 ° C, and keep it in the kettle The vacuum degree is above 0.095MPa. After stirring for 6 hours, take a sample to measure its moisture until the moisture content is lower than 0.05%. Add the above mixture and bismuth naphthenate into tank A of the pouring machine, stir evenly, and call it component A...

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Abstract

The invention discloses a preparation method for a polyurethane adhesive with high initial bonding strength for a fire hose. The polyurethane adhesive is composed of the following components in percentage by weight: 70-90% of oligomer polyols, 1-5% of micromolecular diol, 8-20% of diisocyanate, 0.1-0.2% of bismuth naphthenate, 0.1-0.5% of an antioxidant, 0.1-0.5% of a light stabilizer and 0.1-0.5% of an ultraviolet absorber, and formed by synthesising and granulating under certain sequential steps. The solid polyurethane adhesive prepared by the preparation method disclosed by the invention is high in initial bonding strength, firm in bonding, excellent in weather resistance and heat resistance, high in melt index, high in tensile strength, suitable for hot-melt processing, convenient to process, safe to transport, easy to use, free from use of an organic solvent, and free from causing pollution to environment.

Description

technical field [0001] The invention relates to a preparation method of a polyurethane adhesive, in particular used for bonding a polyurethane inner pipe whose braided layer of a fire hose is polyester filament and adhered to the inner surface of the braided layer. Background technique [0002] As a main and commonly used fire-fighting equipment, fire-fighting hose is necessary for fire-fighting vehicles, public places, factories, schools, warehouses, high-rise buildings, etc. Its performance and quality must be absolutely guaranteed. At present, the widely used fire hose is mainly composed of polyester filament braided layer, polyurethane inner tube attached to the inner surface of the braided layer, and adhesive for bonding the two. The adhesive acts as a bridge between the braided layer and the polyurethane inner tube. important. Since the fire hose is a pressure-bearing flexible pipe fitting, considering its high-pressure, humid, and outdoor use environment, the adhesiv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J175/06C08G18/76C08G18/75C08G18/66C08G18/42C08G18/32
Inventor 梁晓光牛杰峰曲少伟
Owner 洛阳吉明化工有限公司
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