3results about How to "Improved wet adhesion" patented technology

This invention provides an environmentally friendly, moisture-resistant epoxy coating for substrates, its preparation method, and its application. The epoxy coating is obtained by mixing and curing a mixture of component A and component B. Component A includes a resin matrix, a solvent, and additives, including dispersants, defoamers, thixotropic agents, and fluorosilane coupling agents. Component B includes a curing agent. The resin matrix includes bisphenol F type epoxy resin, and the curing agent includes a ketimine curing agent. This invention utilizes the synergistic effect of bisphenol F type epoxy resin, fluorosilane coupling agent, and ketimine curing agent to actively displace interfacial water films and achieve controllable crosslinking upon contact with moisture, fundamentally solving the problem of moisture interference. This imparts excellent wet adhesion and permeability to the coating, effectively avoiding defects such as whitening of the paint film and incomplete crosslinking.

The invention belongs to the technical field of water conservancy and transportation engineering maintenance, and particularly relates to a ship lock concrete surface repairing coating in a seawater soaking environment and a construction method of the ship lock concrete surface repairing coating. Comprising a permeation anchoring bottom coating, a stress buffering middle coating and a super-weather-resistant protective surface coating which are sequentially arranged from inside to outside, and the permeation anchoring bottom coating is a bi-component epoxy-biomineralization composite system. The construction method of the ship lock concrete surface repairing coating comprises the steps that a base plane is diagnosed and cleaned; constructing a negative pressure microenvironment; carrying out in-situ vacuum dehydration and exclusion; negative-pressure prime coat leading-in is carried out; performing controlled ventilation and re-pressing permeation; and constructing a multi-layer system. According to the method, capillary water wedge resistance can be overcome under the condition that a dry base plane does not need to be stopped for a long time, deep penetration and high-strength anchoring of a repairing material to concrete microcracks are achieved, and the chloride ion penetration resistance and durability of a ship lock structure are greatly improved.

This invention relates to a high-solids protective coating suitable for stainless steel and magnesium alloys, resistant to 800℃, comprising component A and component B; wherein component A comprises, by weight parts: methylphenyl silicone resin, 30-40 parts; E51 epoxy resin, 15-20 parts; high-temperature pigment, 15-20 parts; nano-silica, 8-12 parts; modified phosphate, 10-15 parts; mica powder, 6-10 parts; additives, 2.5-3 parts; solvent, a mixture of xylene and n-butanol, 8- 10 parts; wherein component B includes the following components by mass: alicyclic amine curing agent, 45-60 parts; modified alicyclic amine curing agent, 20-30 parts; solvent, a mixture of xylene and n-butanol, 15-25 parts. The preparation method includes the following steps: step S1, preparing component A; step S2, preparing component B; step S3, mixing component A and component B according to a designed ratio, and finally coating and curing to form a film. The advantages of this invention are high adhesion, good corrosion resistance and high temperature resistance.