wetting agent Wetting and wetting agents Wetting is usually a phenomenon in which a liquid substance has the ability to adhere to a solid and infiltrate, spread and penetrate the surface of a solid. The wettability is related to the surface tension of the solid and liquid, the smaller the surface tension of the liquid, the greater the surface tension of the solid, the better the wettability of the liquid to the solid, and the liquid can form a large distribution area on the solid surface.In the process of industrial production, many procedures are inseparable from wetting. Surfactants are the key to wetting, by adding such additives to reduce the surface tension of the liquid, and promote the liquid to better wet solid substances, this surfactant is the wetting agent. According to the object of wetting, wetting agent is mainly divided into substrate wetting agent and pigment wetting dispersant, the former focuses on the wetting of the substrate and the coated surface, for the wetting of the cloth, the latter's role is to promote the wetting and dispersion of pigments and fillers in the substrate, for the impregnation wetting. Substrate wetting agent When coating the substrate with low surface energy, the substrate wetting agent needs to be added to the coating, which can not only improve the wetting and spreading property of the coating on the substrate, enhance the smoothness of the coating surface, but also prevent the undesirable phenomena such as shrinkage hole and shrinkage edge caused by the low surface tension of the substrate, and improve the adhesion of the coating film. Dispersant for pigment wetting The wetting of pigment particles is actually a surface displacement process, that is, the wetting agent molecules will remove the air displacement on the surface of the pigment filler, thereby reducing the interfacial tension between the liquid/solid, enhancing the liquid affinity of the pigment filler, in order to improve the dispersion efficiency and dispersion stability. In fact, the wetting, dispersion and stability of the pigment filler are three inseparable processes, and the prerequisite for the pigment particles to be fully dispersed and stable in the paint is to be well wetted by the liquid medium. There are two key indicators for wetting agent selection: the HLB value of the wetting agent (the hydrophilic lipophilic balance value) and the ability of the wetting agent to reduce surface tension. The key to the selection of wetting agent is to select the auxiliaries that match the HLB value of the pigment. The better the HLB value of the selected wetting agent (hydrophilic and lipophilic balance value) matches the HLB value of the dispersed pigment and filler, the better the dispersion effect. The role of wetting agent: 1.Can change the surface tension and permeability of the coating, can better wet the substrate, used to improve the adhesion of the coating. 2. It can assist in dispersing and assisting in dust prevention of fillers a...

Composition of adhesive Adhesives are adhesives that can bond two objects together, referred to as glue. There are different types of adhesives according to different divisions, the use of adhesives is also quite extensive, and now it has been filled in our lives, for adhesives, do you know how it is composed? How adhesives are composed: Synthetic adhesive Synthetic adhesive is composed of main agent and auxiliary agent, main agent is also called main material, base material or adhesive; Additives are curing agent, diluent, plasticizer, filler, coupling agent, initiator, thickener, antioxidant, inhibitor, stabilizer, complex agent, emulsifier, etc., according to the requirements and uses can also include flame retardant, foaming agent, defoamer, coloring agent and anti-mold agent and other components. Base resin The main agent is the main component of the adhesive, leading the adhesive bonding performance, but also an important sign to distinguish the type of adhesive. The main agent is generally composed of one or two, or even three kinds of polymers, requiring good adhesion and wettability. Substances that can be used as adhesives are: 1.Natural polymers, such as starch, cellulose, tannin, gum Arabic, sodium alginate and other plant adhesives, as well as bone glue, fish glue, blood protein glue, casein and shellac and other animal adhesives. 2.Synthetic resin, divided into thermosetting resin and thermoplastic resin two categories. Thermosetting such as epoxy, phenolic, unsaturated polyester, polyurethane, silicone, polyimide, bismaleimide, allyl resin, furan resin, amino resin, alkyd resin, etc.; Thermoplastic resins such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, acrylic resin, nylon, polycarbonate, polyformaldehyde, thermoplastic polyester, polyphenylene ether, fluorine resin, polyphenylene sulfide, polysulfone, polyketone, polyphenyl ester, liquid crystal polymer, and its modified resin or polymer alloy. It is the largest type of adhesive used. 3.Rubber and elastomer. The rubber mainly includes neoprene rubber, butyl nitrile ethylene propylene rubber, fluorine rubber, polyisobutylene, polysulfide rubber, natural rubber, chloro-sulfonated polyethylene rubber, etc. Elastomers are mainly thermoplastic elastomers and polyurethane elastomers. 4.In addition, there are inorganic adhesives, such as silicate, phosphate and phospho-copper oxide. Additives In order to meet the specific physical and chemical characteristics, the various auxiliary components added are called auxilaries, such as: in order to make the main adhesive form a network or body structure, increase the cohesion strength of the adhesive layer and add curing agents (they react with the main adhesive and produce cross-linking); Adding curing accelerators or catalysts in order to accelerate curing and reduce reaction temperature; In order to improve the resistance to atmospheric aging, thermal aging, arc aging, ozone aging and other properties, add antioxidant; ...

Surfactants play the role of wetting, dispersing, emulsifying and solutizing in pesticide processing, and have become one of the indispensable components of pesticide preparations, and are often called auxiliaries, emulsifiers, dispersants, auxiliary agents, etc., they can be a combination of a variety of surfactants.At present, pesticide formulations are developing in the direction of waterborne, granular, multi-functional, slow-release, labor-saving and fine, and some new formulations that are efficient, safe, economical and environmentally compatible, such as micro-emulsion, water emulsion, suspended emulsion, water dispersion granule, dry suspension agent, slow-release and other new formulations are emerging, and will be the mainstream of pesticide formulation development in the 21st century. The demand of surfactants for new dosage forms of pesticides will promote the production and development of surfactants for pesticides. Trends and directions of surfactants in agrochemicals in the next few years: (1)According to the active characteristics of the original drug, the suspension agent no longer pursues high content, but turns to medium content, but the product must be given high wetting, high spreading and synergic properties. Put forward higher requirements for surfactants. (2)Water emulsion products in the premise of ensuring the stability of the period, the pursuit of greatly reducing the surface tension of the spray solution, and give a moisturizing function. Pesticide water agents represented by glyphosate are developing products with higher content, and for this reason, the types of salts and supporting wetting penetrants are being further updated. (3)The development and promotion of dispersible oil suspension products are growing rapidly, but at present, most products are unstable in suspension stability and self-dispersion quality, which must be solved as soon as possible. (4)The development of suspended emulsions is beginning to heat up, and new drug combinations require surfactants that are more consistent with structural characteristics. (5)The development of biopesticides and preparation varieties (WP, SC, WG) has accelerated, and the original fermentation product preparations containing protein and sugar, the existing agricultural surfactant product structure is no longer suitable, and the development must be accelerated. The old pesticide varieties with benzene ring as the parent are replaced faster, and the newly developed pesticides are mostly heterocyclic compounds. Nowadays, low melting point pesticides are decreasing and high melting point pesticides are increasing. The number of preparations using light aromatic hydrocarbons as solvent is decreasing, and the structure of solvent is changing. The development of dosage forms such as high-content and solvent-free creams is accelerating. All these challenges to the old system of pesticide surfactants formed with benzene ring as the main structure and light aromatic hydrocarbo...

Specialty tapes have a variety of uses, such as automotive, construction and medical. Each application has different requirements, and for the tape industry, we have developed polymer dispersions for different specialty tape pressure-sensitive adhesive coatings, direct coating adhesive formulations and UV curable acrylic hot melt adhesives.From polymer design to odor removal technology, we focus on reducing VOC content and odor in our products to maximize product performance. Advanced UV curable hot melt adhesive Bring the advantage of sustainable development The product series uses advanced UV curing acrylic hot melt adhesive technology. Significant sustainability benefits: Variable adhesion is achieved through adjustable UV crosslinking Excellent aging resistance, water resistance and heat resistance Low atomization and VOC Safe in contact with food, no potential risk of skin irritation Water-based pressure sensitive adhesive system Efficient solution In addition to UV-curable hot melt adhesives, the product line can also produce high efficiency tapes for customers. The product is water-based acrylic pressure sensitive adhesive system,It provides: Excellent bonding properties Solvent-free discharge Low VOC, low odor Does not contain APEO Can be coated at high speed Energy conservation The Coating Centre offers a range of coating solutions, samples and demonstrations, as well as advice and support on adhesive technology.Continuous optimization of coating technology and new plant concepts. With our coating equipment, product development can be carried out to simulate the production conditions of our customers.Our team is able to help clients make decisions about updating technology or new investments. Continuous efforts in research and development keep our dispersion and resin products at the forefront of performance. With expertise in formulation, application and processing, we look forward to being your partner! Looking for more technical information about high efficiency adhesive tape? Or do you want to test it for yourself? Please feel free to contact us!