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Formula and set for preparing rigid polyurethane foam, preparation method of the same, rigid polyurethane foam, as well as preparation method and application of the rigid polyurethane foam

A polyurethane rigid foam and polyurethane technology, applied in the field of polyurethane rigid foam and its preparation, can solve problems such as poor dimensional stability, inability to produce, and limited selectivity, and achieve good thermal conductivity, reliable quality, and good stability.

Active Publication Date: 2020-09-11
天长市伯士的环保新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] As the international environmental protection requirements are getting higher and higher, many blowing agents F11 and 141B with ODP and GWP not equal to 0 cannot be used. Cyclopentane is flammable and explosive, while environmentally friendly blowing agents such as LBA and Chemours 1100, etc. high price
Therefore, there are few blowing agents available for selection at present, and the selectivity is limited.
[0005] And there are many low-boiling environmentally friendly blowing agents, such as R134a, R600a, 245fa, R-152a, R404a, R410a, R-290, R-507, etc., due to their very low boiling point, when they are used as components of component A, It is not easy to overflow when the temperature of the material reaches ultra-low temperature, and when the temperature is low, due to the high viscosity of polyether, the viscosity is higher at low temperature, so it cannot be produced
[0006] According to the temperature of component A (15℃~25℃) and component B (15℃~25℃) of the current formula, low-temperature foaming agent cannot be used
[0007] Existing environmentally friendly foaming agents such as cyclopentane, LBA, Chemours 1100, etc. have high pressure bubble density (≥ 33kg / m3), poor dimensional stability>0.6(-30℃ / 48h)>1.0(70℃ / 48h), High foam thermal conductivity (≥0.020w / m.k), many bubbles

Method used

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  • Formula and set for preparing rigid polyurethane foam, preparation method of the same, rigid polyurethane foam, as well as preparation method and application of the rigid polyurethane foam
  • Formula and set for preparing rigid polyurethane foam, preparation method of the same, rigid polyurethane foam, as well as preparation method and application of the rigid polyurethane foam
  • Formula and set for preparing rigid polyurethane foam, preparation method of the same, rigid polyurethane foam, as well as preparation method and application of the rigid polyurethane foam

Examples

Experimental program
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preparation example Construction

[0041] The formulation, kit and preparation method of the polyurethane rigid foam provided by the present invention, as well as the polyurethane rigid foam and its preparation method and application are described in detail below.

[0042] The embodiment of the present invention provides a formula for preparing rigid polyurethane foam, which includes a first component and a second component. The first component includes: 90% to 96% of polyether, 2% to 5% of catalyst and 2% to 5% of silicone oil. The second component includes: 70%-94.9% of isocyanate, 5%-29.9% of low-temperature foaming agent and 0.05%-0.1% of desiccant. The boiling point of the low-temperature foaming agent is less than or equal to 15.3°C.

[0043] When using the above formula for preparing rigid polyurethane foam, the first component can be mixed evenly at a higher temperature such as about 50°C, and the second component can be mixed evenly at a low temperature such as below 0°C, and then the two components ca...

Embodiment 1

[0064] The preparation method of the rigid polyurethane foam provided by the present embodiment is specifically:

[0065] The first component: 93wt% polyether (Yadong 4110), 3wt% catalyst cyclohexylamine and 4wt% silicone oil.

[0066] The second component: 85wt% isocyanate (BASF M20S), 7.4wt% 245fa, 7.4wt% R600a, 0.1wt% desiccant phosphite and 0.1wt% polyurethane anti-crystallization agent perchloric acid.

[0067] Mix and stir the first component at 40°C to react uniformly to obtain the first mixture;

[0068] The second component was placed in a mixing tank, and mixed and reacted for 180 minutes under the conditions of vacuum pressure of 0.05 MPa, temperature of -15° C., and stirring speed of 500 r / min to obtain the second mixed material.

[0069] The first mixed material and the second mixed material are mixed and reacted at a mass ratio of 1:1.3 to fully obtain rigid polyurethane foam.

Embodiment 2

[0071] The first component: 90wt% polyether (Yadong 4110), 5wt% catalyst triethanolamine and 5wt% silicone oil.

[0072] The second component: 70wt% isocyanate (BASF M20S), 29.9wt% R134a, 0.05wt% desiccant phenol and 0.05wt% polyurethane anti-crystallization agent perchloric acid.

[0073] The first component was mixed and stirred at 60°C to react uniformly to obtain the first mixture;

[0074] The second component was placed in a mixing tank, and mixed and reacted for 30 minutes under the conditions of vacuum pressure of 0.15 MPa, temperature of 0° C., and stirring speed of 5000 r / min to obtain the second mixed material.

[0075] The first mixed material and the second mixed material are mixed and reacted at a mass ratio of 1:1.8 to fully obtain rigid polyurethane foam.

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Abstract

The invention relates to the technical field of polyurethane foam preparation, and discloses a formula and a set for preparing rigid polyurethane foam, a preparation method of the formula and the set,the rigid polyurethane foam, and a preparation method and application of the rigid polyurethane foam. According to the formula, the first component is prepared from, by mass, 90%-96% of polyether, 2%-5% of a catalyst and silicone oil; a second component comprises the following components in percentage by mass: 70-94.9% of isocyanate, 5-29.9% of a low-temperature foaming agent and a drying agent.The preparation method of the kit comprises the following steps: fully mixing and reacting the components in the first component at 40-60 DEG C to obtain a first mixture; fully mixing and reacting allthe components in the second component sufficiently at the temperature of -20 DEG C to 0 DEG C to obtain the set. The preparation method of the rigid foam comprises the step of mixing and foaming thefirst mixture and the second mixture. The rigid polyurethane foam is prepared by adopting the preparation method. The foam is good in heat conductivity coefficient stability, good in attenuation andsuitable for being applied to a low-temperature heat preservation environment.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam preparation, in particular to a formula for preparing rigid polyurethane foam, a set and a preparation method thereof, rigid polyurethane foam, a preparation method and application thereof. Background technique [0002] The existing rigid foam polyurethane formula is as follows: [0003] [0004] As the international environmental protection requirements are getting higher and higher, many blowing agents F11 and 141B with ODP and GWP not equal to 0 cannot be used. Cyclopentane is flammable and explosive, while environmentally friendly blowing agents such as LBA and Chemours 1100, etc. The price is high. Therefore, there are few blowing agents available for selection at present, and the selectivity is limited. [0005] And there are many low-boiling environmentally friendly blowing agents, such as R134a, R600a, 245fa, R-152a, R404a, R410a, R-290, R-507, etc., due to their very low bo...

Claims

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Application Information

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IPC IPC(8): C08J9/04C08G18/48C08K5/521C08K3/16C08K5/13C08G101/00
CPCC08J9/04C08J9/0038C08J9/0023C08J9/0095C08J9/0066C08J9/0033C08G18/48C08J2375/08
Inventor 冯运成关志强麦景恒梁秋明
Owner 天长市伯士的环保新材料有限公司
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