The Difference between Redispersible Polymer Powder and Resin Powder

In recent years, many resin powders have become available, including cheap high-strength water-resistant glue powders 

that can serve as alternatives to traditional VAE emulsions (vinyl acetate-ethylene copolymers). What are the differences between them? 

Can resin powder truly replace redispersible polymer powder?

Redispersible Polymer Powder

Currently, the most widely used redispersible polymer powders globally include vinyl acetate-ethylene copolymer powder (VAC/E), 

ethylene-vinyl chloride-vinyl laurate terpolymer powder (E/VC/VL), and vinyl acetate-ethylene-higher fatty acid vinyl ester terpolymer powder (VAC/E/VeoVa). 

Among these, VAC/E holds a leading position in the global market, showcasing significant technological advantages.

Experience in applying polymers for mortar modification indicates that the most effective technical solutions possess the following characteristics:

1. Extensive application experience in the construction sector.

2. Recognition as one of the most commonly used polymers worldwide.

3. Capability to meet the necessary rheological properties for optimal mortar workability.

4. Low levels of volatile organic compounds (VOCs) and minimal emission of irritant gases when combined with polyresins from other monomers.

5. Excellent UV resistance, good heat resistance, and long-term stability.

6. High resistance to saponification.

7. A broad range of glass transition temperatures (TG).

8. Strong overall adhesion, flexibility, and mechanical properties.

9. Extensive experience in chemical production, ensuring consistent quality and reliable storage stability.

10. Compatibility with protective colloids, such as polyvinyl alcohol, for enhanced performance.

Many "resin" gum powders available in the market contain DBP, a chemical that can negatively impact male sexual function. 

Large quantities of these powders accumulate in warehouses and laboratories, and they are known to be volatile. 

A solvent-soaked "glue powder" has recently gained popularity in the Beijing market, noted for its abundance.

Various Names

Commonly referred to as high-strength water-resistant glue powder, resin glue powder, and similar terms.

Typical Characteristics

1. Emits a very pungent odor.

2. Exhibits poor dispersion; some samples feel wet, while others are flocculent (resembling seafoam porous material). 

Some appear white and slightly dry, but still have an unpleasant smell.

3. Some powders are colored, with current variations including white, yellow, gray, black, and red.

4. The dosage required is minimal, ranging from 5 to 12 kg per ton.

5. Exhibits impressive initial strength; cement can show no strength after three days, causing corrosion and adhesion to insulation boards.

6. It is claimed that XPS boards cannot use an interface agent.

From the samples analyzed so far, it appears that this is a solvent resin adsorbed by light porous material. 

However, suppliers deliberately avoid using the term "solvent," opting instead for "rubber powder."

Disadvantages

1. Aging resistance is poor; the solvent is not temperature-resistant.

2. The solvent's weatherability is a significant concern; it evaporates quickly under sunlight, and even in shade, 

the bonding interface can decompose more rapidly due to its porous structure.

3. The bonding mechanism involves dissolving the interface of the insulation board, which can inadvertently weaken the bonding interface.

 If issues arise later, the consequences can be severe.

4. There is no precedent for its application abroad. Given the extensive experience in basic chemicals internationally, 

the absence of this material in foreign markets raises concerns.

Redispersible Polymer Powder

1. The film formed exhibits a certain level of flexibility and water resistance, meeting national standards.

2.It is a water-soluble redispersible polymer powder made from a copolymer of ethylene and vinyl acetate,

with polyvinyl alcohol serving as the protective colloid.

3.It possesses film-forming properties; a 50% aqueous solution creates an emulsion that can form a plastic film when applied to glass and left for 24 hours.

4.High performance: It offers excellent bonding capabilities, unique characteristics, and outstanding waterproofing. 

It provides strong bonding strength, enhances mortar’s alkali resistance, and improves adhesion, flexural strength, plasticity, 

abrasion resistance, and overall constructability. Additionally, it offers increased flexibility in crack-resistant mortar applications.

Resin rubber powder

1. This is a new type of modifier composed of rubber, resin, polymer, rubber powder, and other substances.

2. Generally durable and wear-resistant, it tends to be poorly dispersed. Some variants may feel flocculent (similar to seafoam porous material) 

and appear as a white powder, often with a pungent, kerosene-like odor.

3. Certain resin powders can be corrosive to boards, and their water resistance is often subpar.

4. Both weather resistance and water resistance are inferior to those of latex powder, with significant issues regarding weather resistance. 

It may volatilize quickly when exposed to sunlight, and even in the absence of sunlight, the bonding interface can degrade more rapidly due to its porous structure.

5. It lacks molding properties and flexibility. According to exterior insulation mortar testing standards, only the breakage rate of polystyrene boards meets the criteria, 

while other performance indicators fall short.

6. It is suitable solely for bonding polystyrene boards and cannot be used for bonding glass beads or fireproof boards.

Name: Molly.Wang

E-Mail:molly.wang@jtdf-rdp.com

Mobile:+86 156 5045 0156(Whatsapp)