B1/B2 grade polyurethane rigid foam spray combination material for building exterior walls

Product Introduction

The foaming agent of the polyurethane rigid foam spraying combinations for building exterior walls is an environmentally – friendly foaming agent with an ultra – low thermal conductivity. When used in combination with WANNATE®2208, it can be constructed on cement surfaces, brick surfaces, wood surfaces, and other substrates. It has strong adhesion and good product dimensional stability. There are differences in flame – retardant performance between different grades:

Grade	Flame – Retardant Performance	Standard
B1 – grade	Excellent, reaching B1 – level	GB 8624 – 2012
B2 – grade	Good, reaching B2 – level	GB 8624 – 2012

Product Applications

The product is applied to spraying insulation fields such as cold storage, food factories, chemical plants, industrial buildings, civil buildings, various pipelines, and storage tanks. It is a fast – curing system that can bear loads immediately and is suitable for most spraying insulation construction requirements. Before using the polyurethane rigid foam spraying combinations for building exterior walls, it is necessary to conduct tests first to ensure the reliability of the combination system for use in specific projects.

Physical and Chemical Properties

Project	Index
Viscosity at 25°C, mPa•s	40 – 250
Density, g/cm³	1.10±0.10
Color	Light yellow or yellow (for B1 – grade); Light – colored or light yellow (for B2 – grade)

Free Foaming Parameters

Project	Index
Cream Time, s	2-3
Gel Time, s	B1 – grade: 9 – 10; B2 – grade: 8 – 10
Tack – Free Time, s	B1 – grade: 11 – 18; B2 – grade: 10 – 13
Free Foaming Density, kg/m³	B1 – grade: 32 – 45; B2 – grade: 27 – 33

Physical Properties

Project	Index
Mechanism Foam Density (B1 – grade), kg/m³	≥45
Density (B2 – grade), kg/m³	≥35
Thermal Conductivity, W/(m·k)	≤0.024
Compression Performance (10% Deformation), kPa	B1 – grade: ≥200; B2 – grade: ≥150
Tensile Bond Strength (with Cement Mortar, at Room Temperature) (B1 – grade), MPa	≥0.10
Dimensional Stability (70°C, 48h), %	≤1.5
Water Absorption Rate, %	≤3
Closed – Cell Rate (B2 – grade), %	≥90

Foaming Requirements

The foaming of the polyurethane rigid foam spraying combinations for building exterior walls requires a material temperature of 25°C, a material volume ratio of 1:1, and manual mixing with an electric stirrer (2500r/min).
When operating in accordance with the precautions in this document, the overall density of the foam product obtained by the high – pressure spraying machine is: greater than 45 kg/m³ for B1 – grade; greater than 35 kg/m³ for B2 – grade.
The values provided in this document are typical test values. Specific data may vary slightly due to environmental conditions. For our company’s products, the listed data have no legal binding force.

Precautions for Use

The construction equipment for the polyurethane rigid foam spraying combinations for building exterior walls is a high – pressure spraying machine. Before construction, please check and calibrate the conveying ratio of black and white materials and the mixing pressure of the high – pressure spraying machine.
The suitable temperature for spraying operations is 10 – 40°C, the wind speed should not exceed 5m/s (grade 3 wind), the relative humidity should be less than 75%, and construction is not allowed in rainy days. When the construction environment temperature is lower than 10°C, reliable technical measures should be taken to ensure the spraying quality.
During spraying operations, control the temperature of black and white materials entering the spray gun to be >30°C, and ensure that the substrate is dry and clean. Control the thickness of each gun of foam within the range of 1 – 1.5 cm (excluding the primer layer). During construction, the next layer can be sprayed only when the surface of the previously sprayed polyurethane rigid foam is no longer sticky. Other relevant standards shall be implemented in accordance with national standards. If the above conditions are not met, all responsibilities shall be borne by the buyer.
Spraying operations shall be carried out in accordance with GB 50404 – 2017 “Technical Specification for Rigid Polyurethane Foam Insulation and Waterproof Engineering”.
The construction site should be a fire – prohibited area, well – ventilated, away from fire sources, and smoking is strictly prohibited. When there is hot – work nearby, the hot – work approval system must be strictly implemented, and corresponding safety measures and special – person guardianship should be taken.
Before formal construction of the project, the buyer must conduct tests in an environment consistent with the construction conditions to ensure the reliability of the combination system for use in this specific project. Formal construction is regarded as the buyer’s recognition of the qualified performance inspection of the product. If the above operations are not followed, all responsibilities shall be borne by the buyer.

Packaging Specifications

Packed in 200L green iron drums.

Storage (Use) Precautions

The combination materials should be stored in sealed containers to avoid absorbing water vapor. Therefore, during storage and transportation, it is necessary to ensure that the containers are dry and sealed.
The polyurethane rigid foam spraying combinations for building exterior walls should be stored in a cool and ventilated place at a room temperature between 5 – 35°C, and sealed to avoid direct sunlight or long – term storage above 40°C to prevent a large amount of foaming agent from volatilizing, which may affect storage and product performance.

Shelf Life

Under suitable storage conditions, the shelf – life of the B1 – grade polyurethane rigid foam spraying combinations for building exterior walls is 3 months. After 3 months, it can be used continuously after passing the inspection.
Under suitable storage conditions, the shelf – life of the B2 – grade polyurethane rigid foam spraying combinations for building exterior walls is 6 months. After 6 months, it can be used continuously after passing the inspection.

Safety Precautions

Direct contact with the polyurethane rigid foam spraying combinations for building exterior walls can cause moderate eye irritation and mild skin irritation, and may cause skin allergies. Repeated inhalation of high – concentration vapors can cause respiratory allergies. Seek medical attention immediately and take anti – inflammatory, anti – allergic and other symptomatic treatment measures.
When operating, be careful to prevent direct contact with the skin and splashing into the eyes. Wear necessary protective equipment (gloves, safety glasses, work clothes, etc.).
Once splashed on the skin or in the eyes, immediately rinse with clean water for at least 15 minutes, wash the skin with soapy water, and seek medical attention if necessary. In case of ingestion, seek medical attention immediately for symptomatic treatment.

Fire and Explosion Hazards

This product is not a flammable liquid, explosive, oxidizer, corrosive, toxic, or radioactive hazardous material during storage and transportation, and does not belong to hazardous goods.
Fire – fighting media: Carbon dioxide, foam, or chemical dry powder fire extinguishers can be used for fire – fighting. When there is no other fire – fighting agent, a large amount of atomized water can be sprayed. Once the fire is extinguished, the spilled materials should be cleaned up (see Leakage and Spillage Handling).
Fire – fighting procedures: Normal protection.

Leakage and Spillage Handling

Small amounts of leaked and spilled materials can be washed away with water. In case of a large amount of leakage, collect and recycle, and wash the contaminated ground with water or detergents.
The disposal of waste combination materials must be carried out in accordance with local government environmental protection regulations.

More Information

For more information, please refer to our company’s product safety data sheet or contact our company’s customer service center.

Note

The indicators and data given in this material are based on our existing technical knowledge and practical experience and are for reference only. The specific guaranteed indicators shall be subject to the quality guarantee letter or supply contract.
Users are responsible for testing the products purchased from our company to verify whether they are suitable for their intended processes and uses and to achieve the intended purpose. Our company has no control over the further application and processing of our products. Therefore, our liability for the products provided is limited to the part delivered by us and used by you, and we do not assume indirect losses caused during the production process using our company’s products as raw materials.
Our company’s technical support and customer service center are willing to provide you with product consultation and application technical services. Welcome to contact us by letter or telephone.