The use of polyvinyl butyral resin

In the 1930s, industrialized production of PVB was achieved abroad. In China, the industrialization of polyvinyl butyral began in the early 1950s. It should be known that polyvinyl alcohol and n-butyraldehyde are one of the methods for producing polyvinyl butyraldehyde PVB resin. PVB resin is formed by the condensation reaction of polyvinyl alcohol (PVA) resin with n-butyraldehyde under acid catalysis. The specific reaction process involves the removal of 2 hydroxyl groups from each 2 segments of polyvinyl alcohol and the combination of oxygen in the aldehyde group of butyraldehyde (butyraldehyde includes n-butyraldehyde and isobutyraldehyde) to form water. The remaining carbon in the aldehyde group is then connected to 2 oxygen, and converted into polyvinyl butyraldehyde. PVB has good film-forming properties, and the film formed by PVB has superior properties such as high transparency, elasticity, toughness, strength, oil resistance, flexibility, and resistance to low-temperature impact. PVB has special chemical structures, such as glass, metal, ceramic powder, plastic, leather, and wood, which have excellent adhesion; In addition, it has good dispersibility to pigments and dyes, and good compatibility with other resins.
The condensation reaction equation of polyvinyl alcohol and n-butanal is as follows:

_ CH-CH β_ CH-CH-CH-CH β_ CH-CH β 2x22y2z||||OHOHOHO-C-COCH3+nCHCHCHCHO322_ CH-CH β_ CH-CH-CH-CH β_ CH-CH β 2...

What is the application purpose of PVB

1. Epoxy resin additive

PVB can be used as an additive for epoxy resins such as composite adhesives, which can improve the rheological properties of epoxy resins and enhance their ductility.

2. Copper foil adhesive

3. Phosphating primer

4. Packaging cardboard with immersion

PVB dissolved in alcohol solvents can be used as a coating or spray paint for packaging cardboard, which can enhance the water resistance and bending resistance of the cardboard. Commonly used, such as cigarettes, wine boxes, etc.

5. Automotive repair paint

For the repair primer of automotive steel plates, a coating formula composed of PVB resin/phenolic resin/epoxy resin can be selected to achieve good bonding compressive strength.

6. Powder coating flow additive

7. BindersforCeramics

8. Textile Sizing Agent, Alcoholic

9. Iron can coating/baking paint, metal foil coating

10. SoncretePaints

11. Gear coating/oil resistant coating

12. Tape adhesive

13. Masterbatch adhesive

Low viscosity PVBB03HX can be used for the production of dispersed pigments.

14. Leather Coatings

15. Reflecting SheetBinder

16. Hot melt adhesive, metal bonding

17. PaperLacquer

18. Candle Coating

PVB and appropriate plasticizers can be blended to produce candle containing immersion glue, which can reduce the vertical flow of wax oil; In addition, adding pigments can make candle colored paint.

19. Plastic product topcoat/gloss protective coating

20. Nitrocellulose Lacquers

The compatibility between PVB and nitrocellulose is also a part of it, so the combination of PVB and nitrocellulose can improve the hardness standard of PVB film and improve the adhesion of nitrocellulose.

21. Pressure sensitive adhesive adhesive

22. Temporary protective film