Himtrust SKN-10 G3

Product description

Polyol (Component A) is a white or yellowish exfoliating liquid.

Isocyanate component (component B) is a polymer of diphenylmethane diisocyanate brands: "Lupranat M 20 S", "Millionate MR-200", "Wannate PM-200", "Desmodur VKS 20 F", "Suprasec 5005", "Сosmonate M-200", "Ongronat 2100" - not stratifying transparent brown liquid.

Physical and mechanical parameters

Preparation and Processing

1. To ensure reactivity and viscosity of the components, it is necessary to bring the temperature of the A component to + 35 to +40°C, B component to +45 to +55°C before processing.
2. Use paddle stirrer to stir the component A for thirty minutes at 500-1000 rpm.
3. The isocyanate component (component B) is not required to be mixed if it was stored at a temperature no lower than +15°C. If the isocyanate component was stored at a temperature below +15°C, then slowly heat it to a temperature not higher than +50°C. Then roll the barrel in a horizontal position to a homogeneous state of the component B.
4. Equipment preparation for polyurethane spraying foam is done accordingly to the equipment manufacturer rules.

Surface requirements:

1. Application surface should be strong, uniform, clean, dry, free of oils, fats, crumbling, exfoliating residues of the old coating, and dirt.
2. Epoxy and polymethylmethacrylate surfaces should be pre-treated with abrasive equipment (belt or disc grinders) and cleared from the dust.
3. Metal surfaces should be decreased and cleaned from rust.
4. Moisture from the ambient air should not condense on the surface of the insulated structures.
5. The surface’s temperature must be at least 3°C above the measured dew point. If necessary, the surface should be heated with heaters or other available and safe methods.

Processing rules

For high-pressure machines:

1. If the ambient temperature is 10-20°C, then the temperature of the flow heaters should be: component A +40 to +45°C, component B +45 to +55°C, the temperature of the hoses +35 to +45°C. Apply a layer of polyurethane foam in a single pass not more than 80 mm.
2. If the ambient temperature is +20 to +30°C, then the temperature of the flow heaters should be: component A +35 to +40°C, component B +40 to +45°C, hoses temperature +30 to +35°C. Apply a layer of foam in one pass with a thickness of not more than 80 mm.
3. If the ambient temperature is +30 to +40°C, then the temperature of the flow heaters should be: component A +30 to +35°C, component B +40 to +45°C, turn off the heating of the hoses. Apply a layer of foam in one pass with a thickness of not more than 80 mm.
4. If the ambient temperature is above 40°C or the surface temperature is above 60°C, we recommend no spraying.

For low pressure machines:

1. The ambient temperature is +15 to +20°C, then barrel with the A component need to be warmed to +40 to +45°C with the component B to +50 to +55°C. The hoses with a length of less than 10 m should be insulated. Apply a layer of foam in one pass with a thickness of not more than 80 mm.
2. If the ambient temperature +20 to +40°C, then the temperature of the component A should be +30 to +40°C, component B +40 to +50°C. Apply a layer of foam in one pass no more than 80 mm.
3. If the ambient temperature is above 40°C or the surface temperature is above 60°C, we recommend no spraying.

Trial spraying

Before applying PPU, a trial spraying should be performed on a similar to the insulated surface. During the trial, start time and coming off time are the control variables, which must correspond to the values specified in the technical conditions.

After 10 minutes of spraying, the sample is cut and the structure is visually evaluated. Normal quality foam should have a fine-mesh structure without any visible defects (shells, air bubbles, etc.). If the composition is not foamed, the foam is brittle or elastic, then you should check the components (brand, shelf life), the dosage, the temperature parameters, and pressure of the components. After all re-spray.

Spraying recommendations

Spraying is carried out from a distance of 0.5-1.0 m. When spraying the material, the operator directs the sprayer perpendicularly to the insulated surface. Foam mass to be applied evenly, without pauses in the movement of the sprayer. The optimal thickness of the foamed layer of the composition applied in one pass is not more than 80 mm. The next layer is sprayed 10 minutes after the formation of the previous layer. Do not apply another layer of material, if the previous layer is not foamed. If during spraying rain has started, then the work should be stopped and to be continued after the previous layer fully dried.

If a large area is required to be sprayed, then the work of spraying all layers has to be completed in one day. In case of a break in the spraying work, all measures should be taken to achieve a good adhesion to the previous layers (cleaning, drying, etc.).

System consumption per 1 m²

System consumption per 1 m² at +10°C-+30°C and a layer thickness of 5 cm is 0.5-0.8 kg. Output with a set of 30-40 m³.

Health effects and precautions

When spraying, use a gas mask BKF or B, goggles with side pads, impervious gloves made of synthetic rubber, special clothing and shoes.

Storage recommendations

The shelf life of the polyol component is 12 months at 20°C and without opening the barrels.

Problems and solutions

To learn more about specific problems and solutions, please refer to the article Instructions for Solving Problems in the Spraying of Polyurethane Foam.

Rights

Production of polyurethane materials and foamed polymeric materials is protected by patents and patent applications. This publication does not grant the right to carry out patented technological processes. The information and recommendations contained in this publication fully reflect Himtrust’s knowledge of the product to the date. All the information is accurate to the best of our knowledge at the time of the publication. Nothing in this publication should be construed as a warranty. In all circumstances, it is the user’s responsibility to determine the applicability of such information or the product itself to the user's specific purpose.