Low-toxicity solvent adhesive for bonding of rigid PVC plastic pipeline system

Abstract

The invention discloses a low-toxic solvent adhesive used in unplasticised polyvinyl chloride plastic duct system for adhesion. The adhesive of this invention consists of best matches of polychloroethylene basic resin, flexible polymer toughened and modified resin and low-toxic mixed solvent, also can include auxiliary agents auxiliary agent such as adhesion-promotion resin, anti-oxidant, thixotropic agent and bulk additive. Using the adhesive of this invention can make the adhesive site of the PVC-U pipe system possess good preliminary strength and final strength and have good sanitary performance. The invention is of simple process for preparing and low cost of manufacture.

Description

technical field [0001] The invention relates to the field of macromolecular materials, in particular to a low-toxicity solvent-based adhesive used for bonding pipes and fittings, and fittings and fittings in rigid polyvinyl chloride (PVC-U) plastic piping systems. Background technique [0002] There have been many reports about PVC-U solvent-based adhesives and preparation methods thereof. "Preparation of Adhesives for PVC-U Pipes" (Xu Guoping, Chemical Building Materials, 1997, (2): 66-67) introduced the use of a mixed solvent containing dichloroethane and trichloroethylene to dissolve and disperse perchlorethylene powder, modify Adhesives for PVC-U pipes prepared with additives and fillers have excellent bonding strength; The PVC-U pipe and pipe fitting adhesive prepared by dissolving and dispersing the main resin and additives in a mixed solvent of dichloroethane has the characteristics of high initial bonding strength, low cost, easy construction, and rapid curing; "mod...

AI Technical Summary

Problems solved by technology

Animal experiments on trichlorethylene have confirmed its carcinogenicity. Although the population epidemiological data are not enough to determine it as a human carcinogen, the International Cancer Research Center (IARC) has classified it from category III (non-human carcinogen) in 1995. substances) are classified as Class IIA (possible human carcinogens); at the same time, the Australian Industrial Chemistry Demonstration and Evaluation Project also classifies it as Class II (possible human carcinogens); although cyclohexanone is less irritating in an atmosphere of 25ppm, it is When it is above 50ppm, it is unbearable. Due to the slow volatilization, the drips and leaks in production, storage and transportation will be strongly and persistently irritating, and the IARC carcinogenicity comment is: positive for animals, suspicious for humans

The defect of solvent carcinogenicity restricts the popularization and application of this kind of adhesive