According to the common glue on the market, its composition is basically water, and some polyvinyl alcohol, white latex, sodium stearate, talcum powder, urea, ethylene glycol, sucrose, essence and so on are added. No harm to human body (if used for eating), if used as eye drops, the consequences are estimated to be more serious.
502 adhesive is a one-component cured adhesive synthesized by using advanced production technology with α -cyanoacrylate as the main component, tackifier, stabilizer, toughening agent and polymerization inhibitor added.
Structural formula: CH2 = C(CN)- Chief Operating Officer -C2H5.
Principle: Under the catalysis of trace water in the air, the polyaddition reaction takes place, which quickly solidifies and sticks the adherend firmly.
References:
Glue/News /3527
How to make glue at home?
1. Step 1: Prepare a small bowl in which the ratio of nail polish remover to white vinegar is 1: 1 respectively.
Second, prepare a little foam and break it into small pieces and put it in.
Third, the foam will slowly melt away at this time.
Fourth, the melted white mucus is the viscose we need.
Fifth, you can look at the effect of viscose. I painted a little and found that the hard paper on both sides was stuck.
How to make self-made glue
1. Take a small bowl.
2. squeeze some toothpaste into the bowl.
Put a spoonful of raw flour in the bowl.
4. Add appropriate amount of boiling water, stir well, and make self-made all-purpose glue.
Extended data:
Glue is an intermediate for connecting two materials, which mostly exists in the form of aqua. It belongs to fine chemical industry and has many kinds. Mainly classified according to the adhesive, physical form, hardening method and the material of the adhered object. Common quick-drying adhesive (the common-1203 quick-drying adhesive-ethyl cyanoacrylate strong quick-drying adhesive is one kind), epoxy resin adhesive, anaerobic adhesive water, UV adhesive (ultraviolet curing), hot melt adhesive, pressure-sensitive adhesive, latex, etc.
How to make simple homemade glue at home?
Materials to be prepared: milk, small pot, spoon, vinegar, measuring cup, strainer, jar, paper towel, water, baking powder.
The specific operation includes the following steps:
1. Pour 125ml skim milk into the pot.
Secondly, heat the furnace to120 c (250 f). Let it get hot, but don't cook it.
3. Add a tablespoon of vinegar and stir the mixture. Even if the surface of the mixture begins to form solids, continue to stir.
Fourth, put the strainer on the jar (preferably on it), and then pour the mixture out through the strainer.
5. Press the block into the filter screen with a spoon to release the liquid.
6. Remove the solids from the screen. Put it back in the pot.
Seven, add 100 ml (half a glass of water) and a tablespoon of baking powder to the liquid.
Eight, a casein substance will start to bubble. When it stops, use the remaining liquid as glue.
Nine, when the liquid becomes the state shown in the figure, the glue is completed. Can be packaged and used.
How to make glue
Glue is a substance that can bond two objects.
Glue does not exist independently, it must be applied between two objects to play a bonding role. Chemical composition in glue, in water environment.
The polymers in glue (vinyl acetate in white glue is a petroleum derivative) are all round particles, and the radius of the particles is generally between 0.5 and 5 μ m. The adhesion of objects is achieved by the tension between polymers in glue.
In glue, water is the carrier of medium and high polymers, and water slowly immerses the polymers into the tissues of objects. When the water in the glue disappears, the polymer in the glue will rely on the tension between them to tightly combine the two objects.
In the use of glue, too much glue will make the polymers in the glue squeeze together; There is no good tension between polymers. Polymers are so crowded with each other that the strongest attraction between them cannot be formed.
At the same time, water between polymers is not volatile. This is why "the thicker the adhesive film, the worse the bonding effect of glue" in the bonding process.
If the amount of glue is too much, the glue plays a "filling role" rather than a bonding role. The adhesion between objects depends not on the adhesion of glue, but on the "cohesion" of glue. If it is not water-soluble, the principle is similar, that is, using other solvents instead of water.