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A thermal insulation material, polyurethane technology, applied in the field of solar polyurethane thermal insulation materials, to achieve the effects of uniform molecular weight distribution, simple process, and simple preparation process
Active Publication Date: 2011-11-02
SHANDONG LINUO PARADIGMA
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Problems solved by technology
[0004] In the prior art, there are many solar thermal insulation materials that use water as a foaming agent, but there are many shortcomings in the all-water foaming technology, such as poor thermal insulation performance of foam, The viscosity of the system is too high, the fluidity is not good, the diffusion of CO2 is too fast, and the dimensional stability of the foam is not good, which restricts the popularization and application of the all-water foaming technology
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Embodiment 1
[0025] A component is the MDI that NCO content is 30wt%,
[0026] Component B is an all-water combined polyether, consisting of the following components by weight:
[0027] Bio-based polyether polyol 25 parts,
[0028] 2.5 parts of deionized water,
[0029] 35 parts of sorbitan,
[0030] Sucrose 28 parts,
[0031] 2 parts of polyether modified organopolysiloxane,
[0032] 2.7 parts of N, N-dimethylcyclohexylamine,
[0033] The molecular weight distribution of the bio-based polyether polyol is 1000-1200, the hydroxyl value is 490mgKOH / g, and the viscosity at 25°C is 3600mPa·s.
[0034] Preparation method: pump each component in component B from the material tank to a small material tank for stirring and mixing to obtain component B. The temperature of component A and component B is controlled at 23-25°C. After being mixed at high speed in the high-pressure gun, it is poured into the cavity of the solar water tank for foaming. After high-temperature curing, a solar thermal...
Embodiment 2
[0036] A component is the MDI that NCO content is 32wt%,
[0037] Component B is an all-water combined polyether, consisting of the following components by weight:
[0038] Bio-based polyether polyol 30 parts,
[0039] 4 parts deionized water,
[0040] 38 parts of sorbitan,
[0041] 30 parts of sucrose,
[0042] 2.3 parts of polyether modified organopolysiloxane,
[0043] 3 parts of N,N-dimethylcyclohexylamine,
[0044] The bio-based polyether polyol has a molecular weight distribution of 1000-1200, a hydroxyl value of 490 mgKOH / g, and a viscosity of 3600 mPa·s at 25°C.
[0045] Preparation method: pump each component in component B from the material tank to a small material tank for stirring and mixing to obtain component B. The temperature of component A and component B is controlled at 23-25°C. After being mixed at high speed in the high-pressure gun, it is poured into the cavity of the solar water tank for foaming. After high-temperature curing, a solar thermal insul...
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Abstract
The invention relates to a solar polyurethane thermal insulation material which belongs to the technical field of solar thermal insulation materials. MDI (methyl diphenylene diisocyanate) containing 30-32wt% of NCO (isocyanate group) is mixed with full-water combined polyether according to a weight ratio of 1.294:1, thereby acquiring the solar polyurethane thermal insulation material. The full-water combined polyether comprises bio-polyether polyol, deionized water, sorbierite polyether, cane sugar polyether, foam evening agent and catalyst, wherein the molecular weight distribution of the bio-polyether polyol is 1000-1200; a hydroxyl value is 490mgKOH / g; a viscosity at 25 DEG C is 3600mPa.s; the foam evening agent is polyether modified organic siloxane; and the catalyst is N,N-dimethyl cyclohexane. The solar polyurethane thermal insulation material has the advantages that the preparation process is simple, the operation is convenient and the automatic continuous production is realized; the environment is protected, an ODP (Ozone Damaging Potential) value is zero and the toxic side effect does not exist; and the phenomena of contraction, transformation and expansion at normal temperature, 100 DEG C or 25 DEG C are avoided, the size stability is high, the strength is high, the brittleness is small and the heat-conducting coefficient is small.
Description
technical field [0001] The invention relates to the technical field of solar thermal insulation materials, in particular to a solar polyurethane thermal insulation material. Background technique [0002] At present, the principle of solar thermal insulation materials is to use high-pressure infusion equipment to combine polyether and isocyanate through 100Bar high-pressure impact, and mix polyurethane thermal insulation materials. Polyurethane thermal insulation material is a very important synthetic material, with excellent physical and mechanical properties and chemical resistance, especially low thermal conductivity, is a high-quality thermal insulation material, widely used in refrigerators, freezers, automobile industry, construction industry . In polyurethane rigid foam, the commonly used blowing agent is chlorofluorocarbon (CFC) blowing agent, but because chlorofluorocarbon (CFC) blowing agent has a destructive effect on the atmospheric ozone layer, in order to mai...
Claims
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Application Information
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