The invention relates to a process for preparing modified
acrylic resin coating agent.
Acrylic resin belongs to a film forming material, which is used most widely in leather
coating materials and characterized by strong
adhesive force, smooth
film coating, brightness, bending resistance, good
extensibility and stable structure. The
acrylic resin has the disadvantages of 'hot sticking, cold
brittleness',
solvent intolerance, poor
weather resistance and the like. The invention utilizes ethyl
orthosilicate and
acrylate monomers as raw materials, synchronously employs
sol-
gel method and non-soup
emulsion polymerization under the condition that low molecular
oligomer is taken as a stabilizing agent. In the process of preparing, no emulsifying agent is added, thereby avoiding the effects of isolation, elasticity,
ageing resistance, exudation and the like of the emulsifying agent, achieving single and dispersed latex particles of which the surface is clean, enabling film build to have high
water resistance and good physical-mechanical properties.
Nanometer particle SiO2 generated by synchronously employing
sol-
gel method is capable of improving intensity, elasticity,
ageing resistance and transparency of
coating and endows leathers with good hand feeling.