Development trend of leather finishing agent-Iota

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Service > Development trend of leather finishing agent

Development trend of leather finishing agent

Development trend of leather finishing agent for waterborne polyurethane finishing agent gradually occupy the dominant position, solvent type to a environmental protection type, single finishing agent to complex and multi-functional finishing agent development.

Waterborne polyurethane finishing agent non-toxic, no pollution to the environment, energy saving, easy processing, and is independent of the viscosity and flow properties and polymer relative molecular mass, relative molecular quality adjusted to want the highest level. Therefore, the comprehensive properties of the film. With the rapid development of polyurethane industry, learn from the advanced achievements of waterborne polyurethane coatings, waterborne polyurethane finishing agent performance will be perfect day by day, the species will also be diversified, including not only single component thermoplastic resin, single group divided into UV curing, and there will be a two-component waterborne polyurethane leather finishing agent.

Waterborne polyurethane finishing agent of recent research will in the continuous improvement of emulsion storage stability and film water resistance based on, increase the solid content of the emulsion, improve polyurethane finishing agents varieties such as the production of aliphatic polyurethane emulsion finishing agent (such as IPDI type polyurethane finishing agent), to complete the polyurethane finishing agent of diversification, serialization and specialization.

With the implementation of environmental regulations, solvent type finishing agent everywhere restricted, water development of finishing agent is imperative, solvent to water conversion must deal with the related technologies are: membrane water chemical, paint rheological properties, surface tension, viscosity formula, drying, a total of solvent as, water evaporation and the effect of moisture, finishing agent of recoating and spraying, rolling coating equipment need, these technologies must strictly control, to ensure the product construction, coating performance and appearance.

The stability of waterborne nitrocellulose emulsion finishing agent, short storage period, the appearance of coating than solvent based, while China's top leather finishing most of the solvent type nitrocellulose binder, waterborne nitrocellulose finishing agent has certain technical content; radiation curable leather finishing agent with short curing time, production high efficiency, low pollution and low energy consumption, is the international research focus, Ali and Islam reported the continuous aromatic polyurethane / acrylic acid oligomer UV curing system on a single functional monomer (EHA), two (TPGDA) functional monomer and hard monomer (MMA), plasticizer and a reactive diluent (N- vinyl pyrrolidone and two three glycol reduction two acrylate) effect on coating gloss, abrasion resistance and tensile strength.

The effect of the formulation of the polyurethane / acrylate UV curing system and the reactive diluent on the properties of the leather coating was studied.. The so-called composite finishing agent, will be two or more into the film by chemical modified synthesis of a good comprehensive properties of leather finishing agent, single leather finishing agent, exist in most certain defects, through the complementary properties of various types of finishing agent, in order to protect the coating has good comprehensive properties, such as the combination of acrylic polyurethane ionomer and casein and a variety of conventional base material and a curing agent combined can provide a coating of a more comprehensive performance. Multifunctional finishing agent general in the coating film introduced organic silicon and fluorine polymer, make leather finishing agent has special functions such as super weatherability, waterproof, anti fouling and anti oil performance.

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