RF-9065: A High-Performance Acrylic Polymer for Flexible Waterproofing Solutions

Reliable waterproofing is a fundamental requirement in modern construction. Whether a coating is used to protect a building surface, concrete substrate, or other construction components, the waterproofing layer must remain intact when exposed to water, temperature changes, substrate movement, and other environmental conditions.

For manufacturers, the challenge is to develop a coating that combines water resistance with flexibility, adhesion, mechanical strength, and formulation stability. The polymer emulsion selected for the formulation plays a central role in achieving this balance.

RF-9065 is a high-performance styrene/acrylate copolymer emulsion developed for one-component flexible waterproofing applications. It provides a combination of high elasticity, good substrate adhesion, excellent powder encapsulation, high thickening response, water resistance, and anti-swelling performance under water immersion.

Advanced Polymer Technology for Waterproofing

RF-9065 is based on styrene/acrylate copolymer technology. The product is supplied as a milky white liquid with approximately 48 ± 1% solid content and a pH value of 8 ± 1 at 25°C. Its particle diameter is specified at 0.10–0.30 μm, while its minimum film-forming temperature is below 0°C.

These characteristics provide a suitable polymer foundation for developing flexible waterproofing coating systems.

In a waterproof coating, the polymer needs to form a continuous film after application. The quality of this film directly influences the coating's flexibility, adhesion, mechanical properties, and resistance to water. RF-9065 has been developed to provide a balanced performance profile for these requirements.

High Elongation for Flexible Film Formation

One of the most important advantages of RF-9065 is its flexibility.

Waterproofing films may be exposed to movement and deformation during service. A flexible coating can better accommodate such movement than a rigid film. RF-9065 provides good elasticity durability and demonstrates high elongation at break.

According to the reported test results, the RF-9065-based coating achieved an elongation at break of 406% under untreated conditions. After alkali treatment, the value increased to 520%. Acid treatment and heat treatment resulted in elongation values of 385% and 340%, respectively.

The coating also passed the reported -15°C low-temperature bending test, demonstrating its flexibility under the specified low-temperature condition.

For formulators, this combination of high elongation and low-temperature flexibility can be valuable when developing flexible waterproofing products.

Excellent Water Resistance

A waterproof coating must remain stable during water exposure. Continuous contact with water can create challenges such as swelling, whitening, and deterioration of coating performance.

RF-9065 is designed with excellent water resistance and excellent anti-swelling properties under water immersion. The product information states that its small molecule migration control technology contributes to excellent interlayer adhesion and water resistance, while also supporting weather resistance and aging resistance.

The reported water impermeability test was conducted at 0.3 MPa for 2 hours, and the RF-9065-based coating was reported as impermeable and passed the test.

This result demonstrates the waterproofing capability of the tested coating system under the specified conditions.

Strong Adhesion Even on Damp Substrates

Adhesion is another essential performance factor in waterproofing.

If the coating does not bond effectively to the substrate, the waterproofing layer may lose its continuity and effectiveness. RF-9065 is designed to provide good adhesion to substrates.

The reported adhesion strength was 1.48 MPa under standard conditions and 1.50 MPa on a damp substrate.

The damp-substrate result provides useful evidence of the product's adhesion performance under the specified testing conditions and is particularly relevant when considering construction environments where moisture may be present.

High Thickening Response and Powder Encapsulation

For waterproof coating manufacturers, formulation behavior is just as important as final film performance.

RF-9065 offers a high thickening response and excellent powder encapsulation, as well as good pigment and filler loading capacity. These characteristics allow the polymer to be considered for formulations containing significant amounts of mineral fillers.

The product document provides a representative formulation containing:

• 45% RF-9065

• 43.5% 800-mesh ground calcium carbonate

• 0.3% dispersant

• 0.2% defoamer

• 0.5% additional defoamer

• 0.3% ethylene glycol

• 0.3% thickener

• 10.7% water

• 0.2% biocide

This formulation example can provide a useful starting point for manufacturers conducting laboratory evaluations and formulation optimization.

Strength and Flexibility in One System

Flexible waterproofing coatings need to achieve a balance between tensile strength and elongation.

RF-9065 achieved a reported tensile strength of 2.45 MPa under untreated conditions. After alkali treatment, the tensile strength was 1.25 MPa, while acid treatment resulted in 1.36 MPa. Following heat treatment, tensile strength reached 2.97 MPa.

These results, together with the high elongation values, show the mechanical performance of the RF-9065-based coating under the specified test conditions.

Rather than focusing on a single property, RF-9065 provides a combination of flexibility and mechanical strength that can support the development of balanced waterproofing formulations.

Key Benefits at a Glance

For manufacturers evaluating polymer emulsions for flexible waterproofing, RF-9065 offers several notable characteristics:

High elasticity — supports flexible waterproofing film development.

Good substrate adhesion — provides strong reported adhesion under both standard and damp conditions.

Excellent water resistance — supports impermeable waterproof coating performance under the reported test conditions.

Anti-swelling performance — helps the waterproof film resist swelling during water immersion.

Excellent powder encapsulation — supports formulations with high powder loading.

High thickening response — provides useful formulation and rheological characteristics.

Good low-temperature flexibility — the reported coating passed the -15°C bending test.

Weather and aging resistance — additional performance characteristics stated in the product information.

The product introduction indicates a construction dosage of approximately 1.5 kg of liquid material per square meter, providing a reference point for application evaluation.

Supporting the Development of Modern Waterproofing Products

The demands placed on construction waterproofing materials continue to evolve. Manufacturers need products that combine reliable waterproofing with flexibility, adhesion, formulation efficiency, and resistance to environmental conditions.

RF-9065 provides a polymer platform designed around these requirements. Its styrene/acrylate copolymer technology, high elongation, good adhesion, excellent powder encapsulation, high thickening response, water resistance, and anti-swelling performance make it a useful option for developing one-component flexible waterproofing systems.

For construction chemical manufacturers looking for a versatile polymer emulsion for flexible waterproofing applications, RF-9065 offers a practical combination of film performance and formulation advantages—helping formulators move toward more durable and flexible waterproofing solutions.