Application of Emulsion Powder in Mortar


Release time:

2016-11-23

Author:

New Earth Group

Source:

Application of Emulsion Powder in Mortar

Material Definition
redispersible latex powderThe product is a water-soluble redispersible powder, which is made of high molecular polymer emulsion by spray drying, polyvinyl alcohol as protective colloid, and a powder thermoplastic resin made of subsequent treatment. This powder in contact with water can be quickly re-dispersed into emulsion, re-dispersible emulsion powder with high bonding capacity and unique film-forming properties, so it has good water resistance, construction and heat insulation, etc., in the mortar The scope of application is extremely wide.
Main varieties
1. Vinyl acetate and ethylene copolymer rubber powder (VAC/E)
2. Ethylene, vinyl chloride and lauric acid ethylene ester ternary copolymer rubber powder (E/VC/VL)
3. Vinyl acetate and ethylene and higher fatty acid ethylene copolymer powder (VAC/E/VeoVa)
Composition
Redispersible latex powder is usually white powder, but there are a few other colors. Its ingredients include:
Polymer resin: located in the core part of the rubber powder particles, but also the main component of the role of redispersible latex powder.
Additive (internal): together with the resin, it plays the role of modifying the resin.
Additives (external): to further expand the performance of redispersible latex powder and add another material.
Protective colloid: a layer of hydrophilic material wrapped on the surface of redispersible latex powder particles, most of the protective colloid of redispersible latex powder is polyvinyl alcohol.
Anti-caking agent: Fine mineral filler, mainly used to prevent rubber powder from caking during storage and transportation and to facilitate the flow of rubber powder (dumped from paper bags or tanker).
Role
The redispersible emulsion powder forms a film after dispersion and plays a reinforcing role as a second adhesive;
The protective colloid is absorbed by the mortar system (it will not be destroyed by water after the film is formed, or "secondary dispersion");
The film-forming polymer resin is distributed as a reinforcing material throughout the mortar system, thereby increasing the cohesion of the mortar;
In wet mortar
Improve construction performance;
Improved flow performance;
Increase thixotropy and sagging resistance;
Improved cohesion;
extended opening hours;
Enhanced water retention.
After curing of mortar
Increase tensile strength; increase bending strength;
reduce elastic modulus; improve deformability;
Increase material compactness; increase wear resistance;
improve the cohesive strength; reduce the carbonation depth;
Reduce the water absorption of the material; make the material have excellent water increase (add water powder)
Application areas
Adhesive mortar for external thermal insulation system of external wall
Exterior wall external insulation system plastering mortar
Ceramic tile adhesive
self-flowing cement mortar
Flexible putty for internal and external walls
flexible anti-crack mortar
Rubber powder, polystyrene particles, thermal insulation mortar
dry powder coating
Polymer mortar products with higher requirements for flexibility
 
physical and chemical index
Performance
Indicators
Appearance
White powder, free flowing
Solid content (wt%)
≥ 98.0
Ash (wt%)
10±2%
Bulk density (g/L)
300-500
protective colloid
polyvinyl alcohol
particle size
≤ 4%> 400um
PH value
6-8
Glass transition temperature Tg(DSC)℃
Indefinite
Minimum film forming temperature (℃)
0~5 ℃
 
Shandong Xindadi Redispersible Emulsion Powder Model and Performance Index Correspondence Table

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