Polyurethane material and preparation method thereof
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A technology of polyurethane material and polyether, which is applied in the field of polyurethane material and its preparation, can solve problems such as heat preservation, flame retardancy, and lack of mechanical properties, and achieve the effects of excellent chemical properties, improved compressive strength, and low moisture permeability coefficient
Inactive Publication Date: 2021-01-08
南通濠泰化工产品有限公司
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Problems solved by technology
As a building insulation material, the production and preparation of traditional polyurethane materials have defects, and there are still deficiencies in thermal insulation, flame retardancy, mechanical properties, etc. There is still room for improvement in key indicators such as thermal conductivity, water absorption, and oxygen index.
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Embodiment 1
[0024] Raw materials for polyurethane preparation are proportioned in parts by mass:
[0025] serial number name number of copies 1 Poly(1,4-cyclohexanedimethanol adipate) 32 2 polycarbonate diol 43 3 1,4-Butanediol 4 4 Dibutyltin dilaurate 0.06 5 Low viscosity dimethyl silicone oil, methyl phenyl silicone oil 3 6 Silica powder 2.5
[0026] The preparation method is as follows:
[0027] S1. Add polycarbonate diol into the reaction kettle, stir, and heat at 100°C;
[0028] S2. The polycarbonate diol is vacuumized and dehydrated, and the moisture in the raw material and the system is measured by the Karl Fischer method until the moisture content is lower than 1%,;
[0029] S3. Put poly(1,4-cyclohexanedimethanol adipate), heat to 75°C, add dibutyltin dilaurate, low-viscosity dimethyl silicone oil, methylphenyl silicone oil, and react for 3 hours above, and carry out vacuum degassing;
[0030] S4. Add 1,4-butanediol an...
Embodiment 2
[0034] The preparation method is the same as in Example 1, and the raw materials for polyurethane preparation are proportioned in parts by mass:
[0035] serial number name number of copies 1 Poly(1,4-cyclohexanedimethanol adipate) 37 2 polycarbonate diol 46 3 1,4-Butanediol 5 4 Dibutyltin dilaurate 0.06 5 Low viscosity dimethyl silicone oil, methyl phenyl silicone oil 5 6 Silica powder 4
Embodiment 3
[0037] The preparation method is the same as in Example 1, and the raw materials for polyurethane preparation are proportioned in parts by mass:
[0038] serial number name number of copies 1 Poly(1,4-cyclohexanedimethanol adipate) 40 2 polycarbonate diol 20 3 1,4-Butanediol 3 4 Dibutyltin dilaurate 0.06 5 Low viscosity dimethyl silicone oil, methyl phenyl silicone oil 7 6 Silica powder 5
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Abstract
The invention discloses a polyurethane material which comprises the following components in parts by mass: 32-40 parts of polyisocyanate, 43-50 parts of a polyether polyol, 4-6 parts of a chain extender, 3-7 parts of an organic silicon foam stabilizer, 2.5-5 parts of silica powder and 0.06 part of a catalyst, the polyisocyanate is poly (1, 4-cyclohexanedimethanol adipate), and the polyether polyolis polycarbonate diol. Wherein the chain extender is 1, 4-butanediol, and the catalyst is dibutyltin dilaurate. The preparation method comprises the following specific steps: S1, stirring polycarbonate diol in a reaction kettle, carrying out vacuum dehydration, adding poly (1, 4-cyclohexanedimethanol adipate), and adding dibutyltin dilaurate and the organic silicon foam stabilizer; adding 1, 4-butanediol and silica powder, and quickly stirring for 1 hour; aging and cooling. The performance of the prepared polyurethane thermal insulation material can completely meet various requirements in theapplication process, and the polyurethane material is high in compression strength, resistant to hydrolysis stability, resistant to aging and not prone to combustion.
Description
technical field [0001] The invention belongs to the production field of polyurethane polymer materials, and in particular relates to a polyurethane material and a preparation method thereof. Background technique [0002] At present, commonly used building insulation materials are mainly divided into two categories: organic materials and inorganic materials. Organic materials include expanded polystyrene board, extruded polystyrene board, phenolic, expanded polystyrene, etc., and inorganic materials include foamed ceramics, foam Cement, rock wool and glass wool etc. Combined with the current application status and development bottleneck of building energy-saving technology, it is urgent to develop and prepare a high-efficiency and energy-saving composite thermal insulation board to replace traditional homogeneous thermal insulation materials such as EPS board, XPS board, PU board and rock wool board. [0003] At present, polyurethane has the characteristics of low thermal co...
Claims
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