High elasticity environmentally friendly silane modified polymer waterproof coating

After years of development of waterproof coatings, the currently marketed products are mainly divided into polyurethane waterproof coatings, acrylic waterproof coatings, polymer cement waterproof coatings and so on
.
Among them, polyurethane waterproof coatings have good waterproof performance and excellent mechanical properties, but generally have poor weather resistance, and contain free isocyanates that are harmful to the human body, and there are problems such as air bubbles during construction
.
Acrylic paint has good weather resistance and environmental protection, but the water resistance of the coating film is poor, and it is difficult to construct under low temperature conditions .
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The polymer cement waterproof coating is easy to bond with the wet base layer, and the construction is convenient.
However, it also has problems such as difficult construction at low temperature and slow drying speed in a humid environment
.
With the development of economy and the diversification of buildings, the waterproof environment has become more and more diversified.
People have also put forward newer and higher requirements for waterproof coatings, such as more environmentally friendly, more weather-resistant, high elongation, and easy construction
.

Silane-modified polymers have been widely used in the field of sealants and adhesives due to their advantages of environmental protection, easy use, wide use, and good adhesion
.
A few days ago, German Wacker Chemie successfully developed a new type of silane-modified polymer GENIOSIL®XT, which has the advantages of convenient use, wide range of uses, and good adhesion.
The single-component high-elasticity waterproof coating formulated with it perfectly overcomes the current market.
The pain points of the above have the following typical advantages:

• Low odor, solvent-free, more environmentally friendly

• Outstanding elongation and weather resistance

• Low viscosity, easy construction, can be directly applied on the wet base surface, no carbon dioxide will be released during curing, avoiding bubbling during construction

• Excellent bonding performance and waterproof performance.
  It can be directly applied to many substrate surfaces without primer during construction.
  It has good adhesion to concrete, cement blocks, glass, ceramic tiles, wood, etc.
  

Waterproof coatings formulated with silane-modified polymers can be directly applied on the surface of many substrates without primer

Molecular structure of silane-modified polymer GENIOSIL®XT

Molecular structure diagram of new silane-modified polymer

The main chain of the polymer is macromolecular polyether, and both ends of the main chain are blocked by isocyanate silane

Preparation of High Elastic Silane Modified Polymer Waterproof Coating

High elasticity environment-friendly silane-modified polymer waterproof coating formulation

Raw materials

The new silane-modified polymer GENIOSIL®XT in the formula is used as the main film-forming substance, which determines the main mechanical properties and weather resistance of the coating film
.
As one of the main formulations, fillers also have a greater impact on the mechanical properties of the coating film
.
The addition of plasticizers is mainly used to reduce the viscosity of the coating formulation, so that the coating has excellent construction performance
.
Aminosilane can strengthen the adhesion of the coating to the substrate, and the surface drying time and curing time of the coating can also be adjusted according to requirements
.
Additives mainly include defoamers, leveling agents and stabilizers, etc.
, which can be added in appropriate amounts according to requirements to optimize the overall performance of the coating
.

Easy to produce, efficient and environmentally friendly

• Cold process production, no heating required, greatly reducing production energy consumption and production costs

Based on the unique structural design of GENIOSIL®XT, the one-component, high-elastic, environmentally-friendly silane-modified polymer waterproof coating can be produced by a cold process.
The raw materials are sequentially added to the stirred tank and vacuumed and fully stirred.
The entire production process does not require heating
.

• Short production cycle, effectively improving production efficiency
  

It only takes 1 hour to fully stir all the materials, and the finished paint can be produced

• No organic tin, no solvent addition, environmentally friendly production
  

No metal organotin, no solvents are added to the entire formulation system, and no free isocyanate is introduced.

Wide range of applications and outstanding performance

• Green
  

After the construction and maintenance of the waterproof coating prepared with GENIOSIL®XT is completed, it can be directly moved in, without harmful substances that will affect your health

• Wide range of applications
  

Silane-modified polymer waterproof coatings are suitable for the interior and surroundings of houses, especially for high-end environmental protection household waterproofing and building waterproofing fields that have higher requirements for elasticity

Silane-modified polymer waterproof coatings are especially suitable for high-end environmental protection household waterproofing and building waterproofing fields that have higher requirements for elasticity

• Outstanding performance
  

The performance indicators of the waterproof coating prepared according to the above formula are as follows:

The product has excellent weather resistance.

Comparison of high elasticity and environmentally friendly silane-modified polymer waterproof coating QUV before and after aging for 5000h