What is the difference between epoxidized linseed oil and solvent?
Epoxy linseed oil as a new type of plasticizer, plasticizing process in plastics can be seen as the resin and plasticizer low molecular compounds dissolve each other in the process, but epoxy linseed oil is different from general solvents, solvents will be volatile in the process, while epoxy linseed oil is required to remain in the polymer over a long period of time, and does not react chemically with the resin, and the resin to form a solid.
The reason why plasticizers play a plasticizing effect, the key is to make the polymer interactions weakened to reduce the melting temperature of the resin to improve the fluidity of the resin in the molten state and product softness, can play such a role in the material are called plasticizers. Plasticizers added to polymer materials, without changing its basic chemical properties, reduce its melt viscosity, glass transition temperature and elasticity of the touch, thereby improving its processability, and improve the flexibility of products and tensile properties.
Epoxy linseed oil added to increase the softness of the plastic, flexural, cold resistance and elongation, reduce the hardness of the plastic, modulus, glass transition temperature, melting point, softening temperature or flow temperature, so that the viscosity of the plastic becomes smaller, increased mobility, thus improving the processing performance. Therefore, epoxy linseed oil has such a high quality performance, is inseparable from its own mechanism.
What is the effect of epoxy linseed oil on coating adhesion?
The production of paint will add a quantitative plasticizer, for example, chlorinated rubber paint in most of the use of chlorinated paraffin as a plasticizer. Plasticity can be understood as flexibility, without plasticizer is difficult to good film formation, adhesion is almost none.
Epoxy linseed oil is used in many paints. Adding a certain percentage of epoxidized linseed oil in the coating will improve the adhesion. Generally speaking, the basic mechanisms of adhesion are mechanical collection, physical adsorption, the formation of hydrogen bonds and chemical bonds, mutual diffusion and other roles, combined with the adhesion generated by these roles, determines the adhesion between the paint film coating and the substrate performance.
Epoxy linseed oil by improving the permeability of the coating on the substrate, wettability makes the coating as far as possible to the substrate holes, crevices in the penetration, to be cured to form a myriad of small anchor points, firmly grasp the substrate, thereby improving the adhesion of the coating on the substrate.
Epoxy linseed oil by improving the wettability of the coating on the substrate, so that the coating can be as much as possible before curing complete wetting, close to the surface of the substrate, thus improving the Van der Waals force and improve the adhesion of the coating on the substrate.
Epoxidized linseed oil can promote the coating and substrate molecules of mutual diffusion, mutual dissolution, and ultimately lead to the disappearance of the interface, thereby improving the adhesion between the coating and the substrate.
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