Modified epoxide resin adhesive with high strength and preparing method thereof

Abstract

The invention discloses a modified epoxide resin adhesive with high strength and a preparing method thereof. The modified epoxide resin adhesive is prepared from, by weight, 80-100 parts of epoxide resin, 3-21 parts of carboxylic acrylonitrile butadiene rubber latex, 1.1-7.7 parts of polyacrylate latex, 5-10 parts of quartz powder, 1.1-1.5 parts of aluminium silicate, 2-3 parts of anti-settling agent, 1-3 parts of aminopropyltriethoxysilan; the ratio of carboxylic acrylonitrile butadiene rubber latex to polyacrylate latex is 2.7:1; the modified epoxide resin adhesive with high strength has good properties of ablation resistance, acid and alkali resistance, moisture absorption and thermal stability, aging resistance, anti-shearing force, high insulation and high sealing, and in terms of electrical insulation property, due to quartz powder added in the formula, and the product after solidification has stronger insulation property and ablation resistance property.

Description

Technical field [0001] The invention relates to the technical field of epoxy resin adhesives, in particular to a high-strength modified epoxy resin adhesive and a preparation method thereof. Background technique [0002] The current high-performance modified epoxy resin adhesives have good bonding strength and durability for bonding metals and non-metals that have undergone strict surface treatment. The joint strength is low, and the durability is poor. For example, the commonly used high-performance epoxy resin adhesive modified E51 epoxy resin is the main resin, and the adhesive prepared by 200# polyamide curing agent has good bonding strength and durability. It is bonded to phosphoric acid anodized LY2CZ. Aluminum alloy surface, the shear strength at room temperature can reach 37MPa, 55 degrees RH98-100% damp heat aging for 1000 hours and 90 degrees salt spray aging for 300 hours, the shear strength is improved compared with the bonding performance at room temperature, durabi...

AI Technical Summary

Problems solved by technology

[0002] The current high-performance modified epoxy resin adhesives have good bonding strength and durability when bonding metals and non-metals that have undergone strict surface treatment, but bonding metals and non-metals that have not been strictly surface-treated is not only adhesive Low bonding strength and poor durability

For example, the commonly used high-performance epoxy resin adhesive modified E51 epoxy resin is the main resin, and the adhesive prepared by 200# polyamide curing agent has good bonding strength and durability. Aluminum alloy surface, the normal temperature shear strength can reach 37MPa, 55 degrees RH98-100% damp heat aging for 1000 hours and 90 degrees salt spray aging for 300 hours, the shear strength is improved compared with the bonding performance at room temperature, and the durability Good, but the shear strength at room temperature is only 19.23MPa when bonding sandpaper-polished aluminum alloy, or even the cross-section of the plate without deliberate surface treatment, 55 degrees RH98-100% damp heat aging for 1000 hours and 90 degrees salt spray aging for 300 hours After the shear strength is almost zero

At present, there is no adhesive in China that has good bonding strength and durability for metal or non-metal surfaces or cross-sections that have not been strictly surface-treated.