Himtrust SKN-40/141 G3

Spraying rigid polyurethane foam density of 40 kg/m3 for seamless insulation of residential and industrial buildings, roofs and other structures prone to infrequent walking, insulation of pipelines, cold insulation of industrial refrigerators and cold rooms by spraying, the foundation for backfilling no deeper than 3 meters with mandatory waterproofing of the finished foam.


Blowing Agent: Freon.

Flammability class – G3 (normal combustibility).

Ambient temperature during spraying is from +10°C to +30°C.

Component A: Himtrust KAN-40/ 141 G3 (tare: 220 kg, 50 kg).


Component B: (container: 250 kg, 50 kg)


Product description

Polyol (Component A) is a transparent liquid from yellow to brown colors.

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

Parameter Value Testing method
Density (in the core) 45-50 kg/m3 GOST 17177-94
Compressive strength 0.2 – 0.23 N/mm2 GOST 17177-94
Bending strength 0.33 -0.37 N/mm2   GOST 17177-94
Closed Cells content 91-93% ISO 4590
Vapor permeability coefficient    0.05 Mg/(m*h*PA)         GOST 25898-2012
Water absorption by volume in 7 days no more than 5% GOST 20869 -75
Thermal conductivity 0.021-0.024 W/(m*S) GOST 7076-99

Preparation and Processing

  1. To ensure reactivity and viscosity of the components, it is necessary to bring the temperature of the A component to 28-30°C, B component to 40-50°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.

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.
  6. Do not spray with if the wind speed is above 7 m/s.

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 30-35°C, component B 45-55°C, the temperature of the hoses 30-45°C. Apply 3-5 mm primer layer of PPU. After the primer layer ceases to crumble when exposed to the surface and becomes elastic, apply a layer of foam in one pass not more than 25 mm.
  2. If the ambient temperature is 20-30°C, then the temperature of the flow heaters should be: component A 30°C, component B 40-45°C, hoses temperature 25-30°C. Apply a layer of foam in one pass with a thickness of not more than 25 mm.
  3. If the ambient temperature is 30-40°C, then the temperature of the flow heaters should be: component A 25-30°C, component B 40-45°C, turn off the heating of the hoses. Apply a layer of foam in one pass with a thickness of not more than 25 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 10-20°C, then the barrel with the A component need to be warmed to 28-30°C with the component B to 50-55°C. The hoses with a length of less than 10 m should be insulated. Apply a primer layer of PPU 3-5 mm, leave for 5 hours until the primer layer becomes elastic. Apply a layer of foam in one pass with a thickness of not more than 25 mm.
  2. If the ambient temperature 25-40°C, then the temperature of the component A should be 25-30°C, component B 35-40°C. Apply a layer of foam in one pass no more than 25 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 2 m 2 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. Spraying is carried out from a distance of 0.6-1.0 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. Insulation of polyurethane foam is applied in 3-4 layers Do not apply another layer of material, if the previous layer is not foamed. If case of rain, stop spraying and continue after the previous layer fully dried. Start spraying with hard-to-reach places (Gables, chimneys, vents, etc.).

System consumption per 1 m2

System consumption per 1 m2 with component temperature of +15 to 30°C and a 5 cm layer of thickness is 2.25 -2.5 kg or a set output of 9-10 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 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.

Differences between freon and water blowing agents

Comparative Characteristics Blowing Agent
Freon Water
Price 10-15% more expensive than domestic water systems and 40-50% more expensiv
e than imported systems.
10-15% cheaper than freon systems of domestic components and 40-50% cheaper than imported systems
Processing conditions Summer systems - spraying at temperatures from +10°C to +30°C. processing Conditions are limited at high temperatures.
Winter systems – spraying at temperatures from -10°C to +15°C. Processing conditions are limited at high temperatures. When processing winter freon systems at low temperatures from +10 to -10°C, it is necessary to apply a primer (dust) layer. The next layer of polyurethane primer is applied after at least 5 hours.
Spraying can be done at temperatures from +10°C to +40°C. There are no winter systems for spraying foam at low temperatures.
Storage Freon is more sensitive to temperature changes, partially flies away during its storage. When storing barrels on the street, in a hot weather, the barrels can swell. Temperature changes are not critical for storage.
Adhesion Adhesion to the base and between layers is better than in water systems Adhesion to the base and between the layers is worse than that of freon systems.
Thermal conductivity 10-15% lower than in water systems, so the foam thickness can be made 10-15% less. 10-15% higher than in freon systems, therefore the insulation thickness should be made by 10-15% more.
 
Density There are no freon systems for spraying foam with density lower than 25 kg/m3 There are components for spraying with density of 8-20 kg/m3
Actual density for systems with a density of 30 kg/m3 The actual density of the finished foam 33-36 kg/m3 or 13-14 cubes with 1 set with a mass of 470 kg and with a thickness of 5 cm for components with a density of 30 kg/m3 at the ambient temperature of 25-30°C and applied two layers of 2,5 cm on the high-pressure vessel. The actual density of the finished foam 40-43 kg/m3, or 10.9 11.75 cubes with 1 set with a mass of 470 kg and with a thickness of 5 cm for components with a density of 30 kg/m3 at the ambient temperature of 25-30°C and applied two layers of 2,5 cm on the high-pressure vessel.

Another products

Himtrust SKN-10 G3

Component A: Himtrust KAN-10 G3 (tare: 220 kg, 50 kg). Component B: (container: 250 kg, 50 kg)

Foaming Agent: Water
Foaming density: 10-15
The output of foam per set: 12-16

Himtrust SKN-20 G3

Rigid polyurethane foam spraying with density of 20 kg/m3 and combustibility class G3 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 18-22
The output of foam per set: 16-18
Consumption per 1m2 at 50 mm thickness: 1,1-1,35

Himtrust SKN-30 G2

Rigid polyurethane foam spraying with density of 30 kg/m3 and combustibility class G2 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 30-35
The output of foam per set: 12-13
Consumption per 1m2 at 50 mm thickness: 2,0-2,25

Himtrust SKN-30 G3

Rigid polyurethane foam spraying with density of 30 kg/m3 and combustibility class G3 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 30-35
The output of foam per set: 12-13
Consumption per 1m2 at 50 mm thickness: 1,8-2,5

Himtrust SKN-30 G4

Rigid polyurethane foam spraying with density of 30 kg/m3 and combustibility class G4 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 30-35
The output of foam per set: 12-13
Consumption per 1m2 at 50 mm thickness: 1,8-2,5

Himtrust SKN 30/141 G3

Rigid polyurethane foam spraying with density of 30 kg/m3 and combustibility class G3 for seamless thermal insulation.

Foaming Agent: Freon
Foaming density: 25-30
The output of foam per set: 12-14
Consumption per 1m2 at 50 mm thickness: 1,75-2,25

Himtrust SKN-30/141 G3 (winter)

Rigid polyurethane foam spraying with density of 30 kg/m3 and combustibility class G3 for seamless thermal insulation.

Foaming Agent: Freon
Foaming density: 30-35
The output of foam per set: 12-14
Consumption per 1m2 at 50 mm thickness: 1,8-2,25

Himtrust SKN-40 G1

Rigid polyurethane foam spraying with density of 40 kg/m3 and combustibility class G1 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 38-43
The output of foam per set: 9-10
Consumption per 1m2 at 50 mm thickness: 2,5-2,75

Himtrust SKN-40 G2

Rigid polyurethane foam spraying with density of 40 kg/m3 and combustibility class G2 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 38-43
The output of foam per set: 9-10
Consumption per 1m2 at 50 mm thickness: 2-2,25

Himtrust SKN-40 G3

Rigid polyurethane foam spraying with density of 40 kg/m3 and combustibility class G3 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 38-43
The output of foam per set: 9-10
Consumption per 1m2 at 50 mm thickness: 2,25-2,5

Himtrust SKN-40/141 G3(winter)

Rigid polyurethane foam spraying with density of 40 kg/m3 and combustibility class G3 for seamless thermal insulation.

Foaming Agent: Freon
Foaming density: 38-43
The output of foam per set: 9-10
Consumption per 1m2 at 50 mm thickness: 2,25-2,5

Himtrust SKN-60 G1

Rigid polyurethane foam spraying with density of 60kg/m3 and combustibility class G1 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 50-60
Consumption per 1m2 at 50 mm thickness: 3,0-3,5

Himtrust SKN-60 G2

Rigid polyurethane foam spraying with density of 60kg/m3 and combustibility class G2 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 50-60
Consumption per 1m2 at 50 mm thickness: 3,0-3,5
Himtrust SKN-60 G3

Himtrust SKN-60 G3

Rigid polyurethane foam spraying with density of 60kg/m3 and combustibility class G3 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 50-60
Consumption per 1m2 at 50 mm thickness: 3,0-3,5
Himtrust SKN-100 G3

Himtrust SKN-100 G3

Rigid polyurethane foam spraying with density of 100kg/m3 and combustibility class G3 for seamless thermal insulation.

Foaming Agent: Water
Foaming density: 90-100
Consumption per 1m2 at 50 mm thickness: 5,0-5,5

Himtrust SKN-100/141 G3

Rigid polyurethane foam spraying with density of 100kg/m3 and combustibility class G3 for seamless thermal insulation.

Start time, (sec): 2-5
Foaming density: 90-100
Consumption per 1m2 at 50 mm thickness: 5,0-5,5

Himtrust SKN-80/141G3

Rigid polyurethane foam spraying with density of 80kg/m3 and combustibility class G3 for seamless thermal insulation.

Start time, (sec): 2-5
Foaming density: 70-80
Consumption per 1m2 at 50 mm thickness: 4.0-4.5
Himtrust SKN-60/141G3

Himtrust SKN-60/141G3

Rigid polyurethane foam spraying with density of 60kg/m3 and combustibility class G3 for seamless thermal insulation.

Start time, (sec): 2-5
Foaming density: 50-60
The output of foam per set: 7-8
Consumption per 1m2 at 50 mm thickness: 3,0-3,5