Aqueous primer coating for improving bonding of silicone adhesive and wooden base material and preparation method thereof

Abstract

The invention discloses aqueous primer coating for improving bonding of a silicone adhesive and a wooden base material and a preparation method thereof. The primer coating is composed of components ofA, B, and C in a mass ratio of 1:1:1; the component A is composed of raw materials: 10-30 parts of aqueous epoxy resin, 5-10 parts of aqueous tackifying resin, 0.1-0.5 part of an emulsifier, and 10-15 parts of water; the component B is composed of the raw materials: 10-20 parts of alkaline silica sol, 1-5 parts of a silane coupling agent, and 5-10 parts of ethanol; and the component C is composedof the raw materials: 3-5 parts of silicate ester and 0.1-0.5 part of titanate. The aqueous primer coating is silicone adhesive primer coating which is safe, environmentally friendly and has non-toxic and non-irritating odors; the bonding capability between the wooden base material and the silicone adhesive can be improved; the environmental pollution and harm to a human body of the primer coating are greatly reduced; and the primer coating has good social, ecological and economic benefits.

Description

technical field [0001] The invention relates to the technical field of water-based coatings, in particular to a water-based primer for improving the bonding of silicone glue and wood substrates and a preparation method thereof. Background technique [0002] The vulcanization reaction of one-component room temperature vulcanizing silicone rubber (RTV-1) is to vulcanize into an elastomer by reacting with moisture in the air. One-component room temperature vulcanizing silicone rubber (RTV-1) does not absorb or release heat during curing, has a small shrinkage rate after curing, and has good adhesion to materials. Many formulations of one-component silicone rubber adhesives exhibit self-adhesive properties on a variety of materials such as most metals, glass, ceramics and concrete, but poor adhesion to polar organic substrates such as wood and plastics. very bad. In order to improve the adhesion between one-component RTV silicone rubber and different substrates, a primer is of...

AI Technical Summary

Problems solved by technology

The primer can effectively improve the bonding between the glass sealant (polyurethane sealant) and the automobile windshield substrate, but the problems in this process are: (1) in the process of preparing the primer, it is necessary to first Prepare the prepolymer, and then prepare the primer, and the isocyanate content must be measured many times during the preparation of the prepolymer and the primer, and the process is cumbersome; (2) due to the use of toxic organic solvents, the primer is not environmentally friendly , harmful to human body

[0006] Chinese patent CN103113789A discloses a primer and preparation method for difficult-to-adhesive materials. Mixing agent, adjusting the solid content at 77-110°C to prepare primer, which can effectively improve the bonding strength of difficult-to-bond materials such as polyethylene and polypropylene, but quinoline exists, which has the disadvantages of bad smell and high toxicity

[0007] Most of the silicone glue primers in the prior art use organic toxic solvents as diluents. Although the bonding strength between silicone glue and various materials such as wood substrates and polar organic materials has been improved, it is extremely polluting to the environment. Difficult to achieve industrial production

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