A compound toughened bisphenol A epoxy resin planting glue with strong bonding ability in high temperature environment and preparation method

Abstract

The invention discloses compound toughening bisphenol-A epoxy resin inserted-bar glue high in adhesive capability in the high-temperature environment and a preparation method of the bispheonl-A epoxy resin inserted-bar glue. The compound toughening bisphenol-A epoxy resin inserted-bar glue is characterized by being made of raw materials comprising a component A and a component B, wherein the component A includes, by weight, 40-60 parts of bisphenol-A epoxy resin, 30-40 parts of end carboxyl nitrile modified bisphenol-A epoxy resin, 20-30 parts of polyurethane modified bisphenol-A epoxy resin and 3-5 parts of silane coupling agents, and the component B includes, by weight, 20-30 parts of polyether amine and 10-20 parts of phenolic aldehyde modified amine, and the component A and the component B are subjected to mixture construction after being evenly mixed according to the weight ratio of 3 to 1. The outstanding characteristic of the glue is that steel-steel tensile shear strength can be up to 38Mpa, so that embedding length-to-diameter ratio can be reduced during bar inserting. A-grade adhesive bonding effect can be achieved when reinforcing steel bars are embedded shallowly, use in the high temperature environment of 120 DEG C can be achieved, and the glue is applicable to the occasion that the reinforcing steel bars limited in embedding depth are still kept high in bonding strength.

Description

technical field [0001] The invention relates to a planting glue and a preparation method thereof, in particular to a preparation method of a planting glue suitable for high-temperature environments with high bonding capacity. Background technique [0002] As a structural adhesive, bisphenol A epoxy resin has the disadvantages of high brittleness, stretchability during curing, and large internal stress. Elastomers have long been used to toughen bisphenol A epoxy adhesives to improve their bonding ability and impact resistance. For example, using acrylic acid and polyurethane to modify bisphenol A epoxy resin, the above methods are mostly bisphenol A epoxy resin mixed with rubber, and the poor compatibility of this kind of toughening method may lead to phase separation. Another method is to react reactive rubber with bisphenol A epoxy resin to introduce rubber into the chain of bisphenol A epoxy resin to produce strong chemical crosslinks, which can not only improve compatibi...

AI Technical Summary

Problems solved by technology

[0006] The present invention mainly solves the problem of poor bonding strength, poor service stability and multi-functionality of existing rubber and bisphenol A epoxy resin blend modification and common bisphenol A epoxy resin and reactive rubber reaction modified epoxy glue. The problem of poor compatibility of bisphenol A epoxy resin and nitrile rubber blending modification