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Types of Phenol-Epoxy Adhesives
Release time:
2016-11-08
1. Environmentally Friendly Phenolic Resin Adhesive: Liu Yaodong et al. on Phenolic Resin Adhesive The synthesis was studied using a process in which formaldehyde and phenol were added in batches at different reaction stages. This approach enabled the adhesive to meet bonding performance requirements while effectively reducing both the free formaldehyde content of the product and the formaldehyde emission after manufacturing. The formaldehyde emission from plywood bonded with this adhesive does not exceed— 0.05mg/L which is significantly lower than the national standard. This adhesive is also used for bonding bamboo boards, making it a relatively ideal low-toxicity, environmentally friendly phenolic resin adhesive.
2. Ceramic-modified phenolic resin adhesive: Wang Jigang and colleagues prepared a high-temperature adhesive using phenolic resin as the matrix and boron carbide and silicon powder as modifying additives. They used this adhesive to bond graphite materials and tested the shear strength of the bonded joints after thermal treatment at different temperatures. The study found that the boron carbide-modified phenolic resin adhesive exhibits excellent bonding strength on graphite. 1500 ° C The bonded strength after treatment reaches 8.6–11.2 MPa However, after high-temperature heat treatment, a relatively obvious shrinkage phenomenon was observed at the bonding interface. Wang Jigang and colleagues also conducted modification studies by adding inorganic materials such as silicon powder into phenolic resins. The research found that when the ratio of silicon powder to phenolic resin is... 1:1 At this time, it can effectively reduce the volumetric shrinkage of phenolic resin adhesives and ensure a relatively high resin carbon yield after high-temperature carbonization. This silicon-modified phenolic resin adhesive with a high residual carbon rate... 200 ° C Solidification and 800 ° C It exhibits good bonding strength after heat treatment.
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