The main classification of rubber powder on the market


Release time:

2016-08-12

Author:

New Earth Group

Source:

The main classification of rubber powder on the market

The main applications on the market todayredispersible latex powderThere are: vinyl acetate and ethylene copolymer powder (Vac/E), ethylene and vinyl chloride and vinyl laurate copolymer powder (E/VC/VL), vinyl acetate and ethylene and higher fatty acid vinyl ester copolymer powder (VAC/VeoVa), acrylate and styrene copolymer powder (A/S), vinyl acetate and acrylate and higher fatty acid vinyl ester copolymer powder (Vac/A/VeoVa), polyvinyl acetate styrene and butadiene copolymer powder (SBR) and so on, the first three account for 80% of the market, especially the first one.
Vinyl acetate is a thermoplastic adhesive prepared by polymerization of acetic acid monomer under the action of initiator. It is usually called white latex or PVAC emulsion for short, and its chemical name is polyvinyl acetate emulsion. It uses water as dispersant, is safe to use, non-toxic, non-flammable, easy to clean, room temperature curing, has good adhesion to wood, paper and fabric, has high bonding strength, colorless and transparent adhesive layer after curing, and good toughness, no contamination of the bonded material; good emulsion stability, storage period of up to more than half a year. Therefore, widely used in printing and binding and furniture manufacturing, used as paper, wood, cloth, leather, ceramics and other adhesives, but also as a phenolic resin, urea-formaldehyde resin and other adhesives modifier, used to make polyvinyl acetate latex paint and so on.
  
The disadvantage of polyvinyl acetate emulsion adhesive is water resistance and moisture resistance, easy to moisture absorption in the humid air, the use of high temperature will produce creep phenomenon, so that the bonding strength decreased; in -5 ℃ storage is easy to freeze, so that the emulsion is damaged. The new type of white latex uses the polymer compound formed by the polymerization of polyvinyl alcohol and formaldehyde as a modifier, which improves the water resistance and freeze-thaw resistance of the emulsion, and expands the application range of the emulsion.
 
Redispersible powder: is a modified emulsion powder obtained by spray drying of polymer emulsion, the main component is vinyl acetate, ethylene or acrylate binary or ternary copolymer. It has good dispersibility, re-dispersed into emulsion in contact with water, can form a film, and has good flexibility.
Resin powder: the main component is containing DBP, dispersion is not good, harmful to the human body, has a pungent smell, the xps board corrosion is very serious. Is a new type of product rubber, high molecular polymer, ground fine rubber powder.

Key words:

Redispersible latex powder