How to improve the initial tack of solvent based pressure sensitive adhesives

Improve solvent-based pressure-sensitive adhesives.

The initial adhesion: the most direct way to improve the glue content, resin content, etc., followed by to improve the viscosity of the rubber compound.

Pressure Sensitive Adhesive.

Abbreviation. It is a class of adhesives that are sensitive to pressure. It is mainly used for the preparation of pressure-sensitive tapes.

In general, the peeling force of the pressure-sensitive adhesive (the peeling force of the adhesive tape and the surface to be adhered after pressurization), the cohesion of the adhesive (the force between the molecules of the pressure-sensitive adhesive), and the adhesive base force (the adhesion between the adhesive and the substrate). Such pressure-sensitive adhesives will not be degummed during use.

1. With the same formula, the initial adhesion can be improved by adjusting the process. This is especially true for glues containing hard monomers (with a large difference in competitiveness).

2. The soft monomer uses acrylate-2-ethylhexyl ester.

3. In order to ensure the stickiness, do not rely on the dosage of crosslinker. Metal salts can be used. Such as titanate, acetone aluminum, etc. A small amount of addition can greatly improve the cohesion of the glue, and the peeling force and initial tack are not too reduced.

By adding water-based rosin tackifying emulsion to improve the initial tack and glass strength, the effect is obvious.

The main thing is to generate a relatively wide molecular weight distribution, so several monomers are selected to be synthesized in a certain proportion, not necessarily saying that the more octyl ester and butyl ester, the better.

Reduce the moisture content of the glue and improve the cleanliness of the surface.

Just increase the proportion of soft monomers.

Pressure-sensitive adhesives work by making full contact with the substrate through flow, glue interacting with the substrate, utilizing pretreatment steps such as mixing. The amount of glue is uniform, easy to use and fast. It can be die-cut into various shapes, and the long-lasting viscoelasticity can avoid embrittlement, breakage, etc.

Surface energy adhesion is the mutual attraction between molecules of different materials, and the surface energy of the material determines the magnitude of this attraction.

Its production process is as follows:

The use of segmented plastic refining to reduce the temperature of the rubber is to divide the plastic refining process into several sections to complete, and ensure that the rubber is fully cooled after each stage of plastic refining. Generally, it is divided into 2 3 sections, and each section is parked for 4 8 hours. The mechanical force can be increased by adjusting the speed ratio of the two rollers, and the larger the speed ratio of the two rollers, the stronger the shear effect, so the better the plasticizing effect, but with the increase of the speed ratio, the temperature rise of the raw rubber accelerates, and the power consumption increases, so the speed ratio is generally (1::.

Reducing the distance between the rollers can also increase the mechanical force and improve the plasticizing effect. The thickness b of the raw rubber after passing through the roller is always greater than the roller distance e, and its ratio b e is called the lead coefficient. The larger the lead coefficient, the greater the shear stress of the raw rubber in the two rollers, and the greater the plasticity of the rubber.

For open mixers, the lead factor is mostly between 2 and 4. The production capacity of the internal mixer plastic refining is large, the labor intensity is low, and the power consumption is low; However, because it is a closed system, it is difficult to clean up, and it is suitable for occasions with little change in rubber grade.

The structure of the mixer is more complex, and the raw rubber is used blindly in the mixing chamber under shear stress and friction between the rotor and the empty wall on the one hand, and the external pressure of the upper jacking bolt on the other hand. The heat generated during mixing is very large, and the material has no time to cool, so it belongs to high-temperature plastic refining, and the temperature is usually higher than 120, or even between L60 and 180. In the internal mixer, the plasticity of the rubber is mainly improved by the strong oxidation chain breaking at high temperature, so the choice of temperature is the key to the mixing.

The molding effect increases with the increase of temperature. However, too high a temperature will also lead to a decrease in the physical bonding and mechanical properties of rubber. When natural rubber is blended, the temperature is generally not more than 150, and 110 120 is the best.

JA-2000F is an acrylic multi-component copolymer emulsion using water as the dispersion medium. The product has excellent properties such as high solid content, low viscosity, good fluidity, strong adhesion to the substrate and water resistance. At the same time, the product is also free of formaldehyde, toluene and other harmful toxins and is also biodegradable and environmentally friendly chemical products.

It is mainly used for the manufacture of aluminum-plastic composite profiles, aluminum profiles and PVC profiles and other smooth surface protective films. The prepared protective film products have a wide range of plate adaptability and environmental temperature adaptation, and can be long-lasting and long-term without degumming on the surface of the protective object and have good tearability, and do not leave glue marks after unmasking.

1 Technical parameters appearance: milky white liquid.

Over-content: 45% 48%.

pH value: viscosity: 100-400

Peel strength: 2 n 25mm

Storage stability: 6 months from 0 to 35.

2.How to use:

According to the formula standard, the JA-2000F emulsion and an appropriate amount of water are weighed in a clean container, and a certain amount of curing agent is slowly added under stirring, and stirred for 10 to 15 minutes to ensure that the curing agent is evenly dispersed in the emulsion before it can be coated on the machine.

3.Packed for storage.

The product is packaged in 200kg plastic drums, and the storage period is 6 months from the date of production, and it can still be used if there are no precipitated impurities after 6 months.

4.Product Transportation.

It is transported as a water-based substance and is not a dangerous goods to prevent liquid leakage.

5.Precautions.

The emulsion and curing agent should be weighed accurately, the dispersion should be uniform, and the drying should be sufficient; Emulsions with hardener should be used within 10 to 12 hours, usually with the formulation.

Answer: a water-based adhesive and its preparation method and application, the weight of which is divided into 1 8% acrylic acid or methacrylic acid, methyl methacrylate 5 20%, acrylate 10 40%, compound emulsifier initiator. 5%, deionized water 40 80%.

The preparation method of water-based adhesive is:

1. Dissolve the emulsifier in water first, and then add acrylic acid or methacrylic acid, methyl methacrylate and acrylate to the emulsifier solution for pre-emulsification;

2. Pour the emulsion of 1 4 1 3 of step a into the reaction kettle and stir and heat to 65 75, add the initiator solution, and react until the solution is transparent;

3. The solution in step B is heated up for synthesis reaction, and the remaining emulsion is gradually dropped into the reaction system, and the remaining initiator solution is added after dropping, and then the pH value is adjusted. The adhesive is suitable for MLCC capacitors, with low cost, good performance and good environmental protection.

Preparation method of ultraviolet light-curing pressure-sensitive adhesive.

2 Acrylic polymer composition, acrylic pressure-sensitive adhesive tape and preparation method thereof 3 Acrylic pressure-sensitive adhesive composition and pressure-sensitive tape.

4 Preparation of silicone modified acrylate high temperature resistant, insulating pressure-sensitive adhesive and adhesive tape 5 Hydrophilic polyurethane pressure-sensitive adhesive and preparation method thereof.

6 Pressure-sensitive adhesive mark cleaner.

7 Modified natural rubber latex pressure-sensitive adhesive and production method thereof 8 High temperature resistant and antistatic pressure-sensitive adhesive tape.

9 Hot melt pressure sensitive adhesives.

10. A kind of high-temperature pressure-sensitive tape and preparation method thereof.

11 Hot melt acrylic medical pressure sensitive adhesive.

12 tackifying emulsion hydraulitous adhesive.

13 Heat-resistant pressure-sensitive adhesive structure.

14 Curable adhesives for pressure-sensitive adhesives and sealants.

15 Multi-layer construction of repulpable pressure-sensitive adhesive.

16 Multi-layer pressure-sensitive adhesive construction.

17 Method and equipment for applying hot melt pressure sensitive adhesive to heat-sensitive fabric 18 Hydrogenated rosin modified acrylic pressure sensitive adhesive.

19 Soft belt with conductive particles forming a bridge along the pressure sensitive adhesive layer 20 Hot melt pressure sensitive adhesive.

Hello dear, the purpose of the present invention is to provide water-soluble pressure-sensitive adhesive, so that it can be applied to the equipment that can be cured by ultraviolet light with high speed and high performance, give the greatest protection to the equipment of the model, prolong the service life of the equipment, reduce the maintenance cost of the equipment, and provide a clean wear protection mode for the equipment that can be cured by ultraviolet light. Technical scheme: In order to achieve the purpose of the invention, the present invention adopts the following technical scheme:

The water-soluble pressure-sensitive adhesive was obtained by the reaction of the following parts: vinyl acetate-N-n-butoxymethacrylamide butyl ester co-state slag polymer, 2 5 parts of rosin sodium salt, 5 10 parts of glycerol, 2 5 parts of isopropanol, 5 15 parts of methanol, 1 3 parts of benzoyl peroxide and 8 12 parts of viscosity regulator; Described vinyl acetate-N-n-butoxymethacrylamide butyl ester copolymer is made up of 30 40 parts ethyl acetate and 40 50 parts naphthenyl vinyl acetate-N-n-butoxymethacrylamide butyl ester copolymer; Described isopropanol is any one of sodium metal-based acid, metal-based calcium or metal-based magnesium. Described rosin sodium salt is a mixture of zinc dithiophosphate, phosphate ester and sulfide lipid any one or several kinds.

Summary. Hello 1Preparation method of ultraviolet light-curing pressure-sensitive adhesive.

2. Acrylic polymer composition, acrylic pressure-sensitive adhesive tape and preparation method thereof.

3 Acrylic pressure-sensitive adhesive composition and pressure-sensitive tape.

4. Preparation of silicone-modified acrylate high-temperature, insulating pressure-sensitive adhesive and adhesive tape.

5. Hydrophilic polyurethane pressure-sensitive adhesive and preparation method thereof.

6 Pressure-sensitive adhesive mark cleaner.

7. Modified natural rubber latex pressure-sensitive adhesive and production method thereof.

8 High temperature and antistatic pressure-sensitive adhesive tape.

9 Hot melt pressure sensitive adhesives.

10. A kind of high-temperature pressure-sensitive tape and preparation method thereof.

11 Hot melt acrylic medical pressure sensitive adhesive.

12 tackifying emulsion hydraulitous adhesive.

13 Heat-resistant pressure-sensitive adhesive structure.

14 Curable adhesives for pressure-sensitive adhesives and sealants.

15 Multi-layer construction of repulpable pressure-sensitive adhesive.

16 Multi-layer pressure-sensitive adhesive construction.

17 Method and apparatus for applying hot melt pressure sensitive adhesive to heat-sensitive fabric.

18 Hydrogenated rosin modified acrylic pressure sensitive adhesive.

19. There is a soft belt of conductive particles forming the bridge along the pressure-sensitive adhesive layer.

20 Hot melt pressure sensitive adhesives.

Hello, I am sorting out the answer according to your question, please wait a moment Hello 1Preparation method of ultraviolet light or sen-curing pressure-sensitive adhesive 2 Acrylic polymer composition, acrylic pressure-sensitive adhesive tape and preparation method thereof 3 Acrylic pressure-sensitive adhesive composition and pressure-sensitive tape 4 Preparation of silicone modified acrylate high-temperature, insulating pressure-sensitive adhesive and adhesive tape 5 Hydrophilic polyurethane pressure-sensitive adhesive and preparation method thereof 6 Pressure-sensitive group or sensitive adhesive mark cleaner 7 Modified natural rubber latex pressure-sensitive adhesive and production method thereof 8 Pressure-sensitive adhesive tape with high temperature resistance and antistatic electricity 9 Hot melt pressure-sensitive adhesive 10 High-temperature pressure-sensitive tape and preparation method thereof11 Hot-melt acrylic medical pressure-sensitive adhesive12 Tackifying emulsion hydraulic sensitive adhesive13 Heat-resistant pressure-sensitive adhesive structure14 Curable adhesive for pressure-sensitive adhesive and sealant15 Multi-layer structure of repulpable pressure-sensitive adhesive16 Multi-layer pressure-sensitive adhesive structure17 Method and equipment for applying hot-melt pressure-sensitive adhesive to heat-sensitive fabric18 Hydrogenated rosin modified acrylic pressure-sensitive adhesive19 Soft belt with conductive particles forming a bridge in the pressure-sensitive adhesive layer20 Hot-melt pressure-sensitive wide adhesive.

Cheongdam Dragon. Medium lift.

It is a class of adhesives that are sensitive to pressure. It is mainly used for the preparation of pressure-sensitive tapes. The adhesion of the pressure-sensitive adhesive (the peeling force exhibited by the adhesive tape after pressurized application to the adhesive surface) must be greater than the adhesion force (i.e., the so-called tackled tackle that is shown when the adhesive tape is lightly touched with a finger).

According to its main components, it can be divided into two categories: rubber type and resin type. In addition to the main ingredients, other auxiliary ingredients should be added, such as tackifying resins, plasticizers, fillers, viscosity adjusters, vulcanizing agents, antioxidants, solvents, etc.

It can be divided into oil-based pressure-sensitive adhesive and water-based pressure-sensitive adhesive.

The essential difference between the two is the polarity of the resin.

The molecule itself carries different groups.

Therefore, the dissolved substances are different.

The water-based pressure-sensitive adhesive you said is that thing, hehe, get it! o(∩_o...