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Conjugate polyether for hard polyurethane foam and using method thereof

A combination of rigid polyurethane and polyether technology, applied in lighting and heating equipment, fluid heaters, etc., can solve the problems of poor foam surface effect, high explosion risk, high transformation cost, etc., and achieve excellent dimensional stability and safe production and operation Effect

Inactive Publication Date: 2012-06-20
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Shanghai Dongda Polyurethane Co., Ltd. through the adjustment of the polyether system, the polyurethane with HFC-245fa, HC, HFC-365mfc as foaming agent can all meet the insulation requirements of electric water heater products; but the boiling point of HFC-245fa is only 15 ℃, In the replacement process, the foaming equipment needs to be modified, and the surface effect of the foam produced is poor. Although HC is liquid at room temperature, it is a flammable and explosive volatile organic compound, which has a very high risk of explosion. Existing storage, metering and foaming equipment undergoes safety renovation, and the operating technical requirements are strict. HFC-365mfc is also a flammable and explosive volatile organic compound, so the cost of equipment renovation is relatively high

Method used

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  • Conjugate polyether for hard polyurethane foam and using method thereof
  • Conjugate polyether for hard polyurethane foam and using method thereof
  • Conjugate polyether for hard polyurethane foam and using method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) HFC-365mfc / HFC-227ea type combined polyether

[0029] 5 parts of polyether polyol SA460, 5 parts of polyether polyol SA380, 0.2 part of silicone foam stabilizer L-6900, N, N, N', N", N"-pentamethyldiethylenetriamine 0.02 parts, 0.15 parts of N, N-dimethylcyclohexylamine, 0.04 parts of 1,3,5-tris(dimethylaminopropyl)-hexahydrotriazine, 2.4 parts of the mixture of HFC-365mfc and HFC-227ea and 0.22 parts of deionized water.

[0030] According to the above formula, add each component into a stainless steel mixing tank, stir at room temperature at a speed of 500 rpm for 1 hour, and discharge to obtain HFC-365mfc / HFC-227ea type combined polyether.

[0031] (2) Preparation of rigid polyurethane foam insulation material:

[0032] The HFC-365mfc / HFC-227ea type combined polyether and isocyanate are foamed at 20°C with a high-pressure machine according to the mass ratio of 1:1.15, and injected into the mold to obtain a core density of 33.4Kg / m 3 Rigid polyurethane foam insu...

Embodiment 2

[0042] (1) HFC-365mfc / HFC-227ea type combined polyether

[0043] 4 parts of polyether polyol SA460, 6 parts of polyether polyol SA380, 0.2 part of silicone foam stabilizer L-6900, N, N, N', N", N"-pentamethyldiethylenetriamine 0.02 parts, 0.16 parts of N, N-dimethylcyclohexylamine, 0.04 parts of 1,3,5-tris(dimethylaminopropyl)-hexahydrotriazine, 2.4 parts of the mixture of HFC-365mfc and HFC-227ea and 0.21 parts of deionized water.

[0044] According to the above formula, add each component into a stainless steel mixing tank, stir at room temperature at a speed of 500 rpm for 1 hour, and discharge to obtain HFC-365mfc / HFC-227ea type combined polyether.

[0045] (2) Preparation of rigid polyurethane foam insulation material:

[0046] The HFC-365mfc / HFC-227ea type combined polyether and isocyanate are foamed at 20°C with a high-pressure machine according to the mass ratio of 1:1.1, and injected into the mold to obtain a core density of 33.2Kg / m 3 Rigid polyurethane foam insul...

Embodiment 3

[0056] (1) HFC-365mfc / HFC-227ea type combined polyether

[0057] 6 parts of polyether polyol SA460, 4 parts of polyether polyol SA380, 0.2 part of silicone foam stabilizer L-6900, N, N, N', N", N"-pentamethyldiethylenetriamine 0.02 parts, 0.13 parts of N, N-dimethylcyclohexylamine, 0.04 parts of 1,3,5-tris(dimethylaminopropyl)-hexahydrotriazine, 2.3 parts of the mixture of HFC-365mfc and HFC-227ea and 0.23 parts of deionized water.

[0058] According to the above formula, add each component into a stainless steel mixing tank, stir at room temperature at a speed of 500 rpm for 1 hour, and discharge to obtain HFC-365mfc / HFC-227ea type combined polyether.

[0059] (2) Preparation of rigid polyurethane foam insulation material:

[0060] The HFC-365mfc / HFC-227ea type combined polyether and isocyanate are foamed at 20°C with a high-pressure machine according to the mass ratio of 1:1.25, and injected into the mold to obtain a core density of 33.5Kg / m 3 Rigid polyurethane foam insu...

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Abstract

The invention belongs to the field of chemical synthesis and relates to a conjugate polyether for hard polyurethane foam and a using method thereof. The hard polyurethane foam made of the conjugate polyether prepared by using a mixture of HFC-365mfc / HFC-227 as foaming agent has excellent dimension stability, compression strength and conductivity coefficient. The invention has the advantages that: the mixture of HFC-365mfc and HFC-227ea, which serves as the foaming agent, has a zero ozone depletion potential (ODP) value and therefore completely meets the environment-protection requirement on substitutive HCFC-141B in the electric water heater industry; and the mixture of HFC-365mfc and HFC-227ea is liquid at normal temperature and has no flashing point, so equipment reconstruction is not needed and the production is safe.

Description

technical field [0001] The invention belongs to the field of chemical synthesis, and in particular relates to a combination polyether for rigid polyurethane foam and a use method thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection, substances that deplete the ozone layer have been phased out. In the field of polyurethane rigid foam, the blowing agent CFC-11 has been replaced because it has a great destructive effect on ozone; and the substitute HCFC -141B also has a certain destructive effect on the ozone layer. Therefore, all countries participating in the Montreal Convention will phase out the use of HCFC-141B according to the plan. In Europe, the United States, Japan and other countries, the use of HCFC-141B has been stopped. As a country participating in the Montreal Convention, China is also facing the replacement work of HCFC-141B, especially when exporting hard foam products to developed countries, such proble...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08J9/14B29C44/00C08L75/08F24H9/00C08G101/00
Inventor 信延垒李心强董建国任丽刘延良
Owner SHANGHAI DONGDA POLYURETHANE
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