Coating classification: adhesion enhancement of Waterborne Coatings

It is suggested that one end of the silicon coupling agent is a hydrolyzable alkoxy group and the other end is an organic functional group The former is hydrolyzed to form a silanol group which will condense with the hydroxyl group on the substrate, while the latter will react with the film-forming material This covalent binding force is stronger than van der Waals force, even force and hydrogen bond binding force So the adhesion also increased In water-based coatings, siloxane is condensed between siloxane groups, and highly condensed products are insoluble in water and fail Therefore, the oligomer must be stable enough Condensation and hydrolysis between silanol groups are reversible The hydrolysis equilibrium constant is related to the alkoxy number on the silicon atom, as follows: Which is the price of Dajin diatom mud Recommended brief introduction: which is the price of Dajin diatom mud? How to buy genuine diatom mud? Guangdong diatom mud agent suggests placing a basin of cold water in the air conditioning room, so that the diatom mud wall can breathe effectively The feature of the breathing wall is obvious When the indoor air is dry, the diatom mud wall will release the absorbed water quickly Put it out to help regulate the indoor dry humidity It is suggested to place a basin of cold water in the air conditioning room, so that the wall of diatom mud can breathe effectively The feature of the wall that can breathe is obvious When the indoor air is relatively dry, the wall of diatom mud will absorb the water Coating House News: one end of the silicon coupling agent molecule is the hydrolyzable alkoxy group, the other end is the organic functional group The former is hydrolyzed to form a silanol group which will condense with the hydroxyl group on the substrate, while the latter will react with the film-forming material This covalent binding force is stronger than van der Waals force, even force and hydrogen bond binding force So the adhesion also increased In water-based coatings, siloxane is condensed between siloxane groups, and highly condensed products are insoluble in water and fail Therefore, the oligomer must be stable enough Condensation and hydrolysis between silanol groups are reversible The hydrolysis equilibrium constant is related to the alkoxy group on the silicon atom, as follows: the less the epoxy group, the more stable it is For example, glycidyl ether oxypropyltrimethylsilane is gelled (600 PA · s) after hydrolysis at 50 ℃ for 4 weeks, while methyldiethanol silane can keep water-soluble, and its viscosity rises from the initial 180 PA · s to 230 PA · s After hydrolysis, the water-soluble oligomer condensed by silane coupling agent has more silanol group and organic functional group than the hydrolyzed monomer molecule, and has larger binding area on the interface between substrate and paint film, so it has greater bonding strength Moreover, it can dissipate the stress from high modulus substrate to low modulus paint film, thus reducing the probability of stress concentration and enhancing the adhesion Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,