Rigid polyurethane foam culture stone and production method thereof
A technology of rigid polyurethane and production method, which is applied in the field of cultural stone, can solve the problems of insufficient thermal insulation performance, poor adhesion, short service life, etc., and achieves excellent thermal performance, good water vapor resistance, and closed cell ratio. high effect
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Embodiment 1
[0035] (1) Use natural stone plates as templates to make molds and reproduce molds;
[0036] (2) Mix 80Kg of polyether, 3Kg of monoethanolamine, 2.5Kg of silicone oil, 5Kg of triethylenediamine and 9.5Kg of 141B and water into a composite material and let it stand for defoaming. The mixing mass ratio of 141B and water is 2:1 .
[0037] (3) Add the above-mentioned combined material and polymerized MDI into the two storage tanks of the foaming machine respectively, and choose to heat up or cool down the materials in the two storage tanks according to the ambient temperature, and control the temperature of the materials at 20-25°C The foaming machine adopts the model PU20F-Y4 foaming machine purchased on the market, and the output of the material after it is added to the storage tank of the foaming machine is controlled by the flow speed valve at the front of the machine.
[0038] (5) Heat up the temperature of the mold finished in step (1), and control the mold temperature at 4...
Embodiment 2
[0046] (1) Use natural stone plates as templates to make molds and reproduce molds;
[0047] (2) Mix 90Kg of polyether, 0.5Kg of small molecule polyether, 1.5Kg of silicone oil, 2Kg of triethylenediamine and 6Kg of blowing agent into a composite material and let it stand for defoaming. The foaming agent is a mixture of 141B and water, and their mass mixing ratio is 3:1.
[0048] (3) Add the above-mentioned combined material and polymerized MDI into the two storage tanks of the foaming machine respectively, and choose to heat up or cool down the materials in the two storage tanks according to the ambient temperature, and control the temperature of the materials at 20-25°C The foaming machine adopts the model PU20F-Y4 foaming machine purchased on the market, and the output of the material after it is added to the storage tank of the foaming machine is controlled by the flow speed valve at the front of the machine.
[0049] (5) Heat up the temperature of the mold finished in ste...
Embodiment 3
[0057] (1) Use natural stone plates as templates to make molds and reproduce molds;
[0058] (2) 85.5Kg polyether, 1.5Kg diethanolamine, 2Kg silicone oil, 3Kg triethylenediamine and 8Kg foaming agent are mixed into a combined material and left to defoam, wherein the auxiliary small molecules are commercially available products, and the foaming agent is 141B and water mixture, their mass mixing ratio is 4:1.
[0059] (3) Add the above-mentioned combined material and polymerized MDI into the two storage tanks of the foaming machine respectively, and choose to heat up or cool down the materials in the two storage tanks according to the ambient temperature, and control the temperature of the materials at 20-25°C The foaming machine adopts the model PU20F-Y4 foaming machine purchased on the market, and the output of the material after it is added to the storage tank of the foaming machine is controlled by the flow speed valve at the front of the machine.
[0060] (5) Heat up the t...
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