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A kind of polyurethane rigid foam composite material and preparation method thereof

A technology of polyurethane rigid foam combination material and polyester polyol, applied in the field of polyurethane, can solve the problems of increased usage of isocyanate, high thermal conductivity, large molecular weight, etc., and achieve the effects of reduced usage, low thermal conductivity and good dimensional stability

Active Publication Date: 2018-03-06
LIMING RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the price of HFC-365 / 227 is relatively high, and the molecular weight ratio of HFC-365 / 227 is larger than that of HCFC-141b. For the same quality of blowing agent, the amount of HFC-365 / 227 is smaller than that of HCFC-141b. With the same foaming density as HCFC-141b, more amount of HFC-365 / 227 needs to be added as a blowing agent, which is costly and unacceptable to people in the industry; if water is used to replace part of HFC-365 / 227, and It will cause an increase in the use of isocyanate, and the price of isocyanate is usually higher than that of combined polyether
[0006] Patent CN101787203B discloses a composite material for solar water heaters using pentafluorobutane (HFC-365mfc) as a foaming agent and a preparation method thereof. Pentafluorobutane is used instead of HCFC-141b to obtain a composite material for solar water heaters, but the thermal conductivity Higher, due to the complete use of HFC-365mfc as the blowing agent, the cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of component A:

[0038] Accurately metered polyether polyol A (functionality 4.5, molecular weight 670) 56 parts, polyester polyol B (2 functionalities, number average molecular weight 350) 5 parts, epoxy soybean oil polyol (hydroxyl value 450) 15 parts 0.05 part of catalyst triethylenediamine, 0.3 part of pentamethyldiethylenetriamine, 0.65 part of N, N-dimethylcyclohexylamine (Air Products Company), surfactant AK-8808 (Nanjing Mesid Company) 1 part, 20 parts of foaming agent HFC-365mfc / 227ea (83:17) (Solvay Company), 2 parts of water, put into the reaction kettle, stir and mix for 2h discharging, and seal the package;

[0039] The materials of components A and B are mixed and reacted according to the weight ratio of A:B=100:100 to prepare foam, and the quality of the product is tested.

[0040] Molded core density: 36.2kg / m 3

[0041] Compressive strength: 223kPa

[0042] Thermal conductivity: 17.6mW (m K) -1

[0043] Dimensional Stability:

[0044...

Embodiment 2

[0048] Preparation of component A:

[0049] 50 parts of accurately metered polyether polyol A (functionality 4.3, molecular weight 500), 7 parts of polyester polyol B (2 functionalities, number average molecular weight 500), 20 parts of vegetable oil polyol C (hydroxyl value 310), Catalyst: 0.3 parts of pentamethyldiethylenetriamine (Air Products, USA), 0.5 parts of N, N-dimethylbenzylamine (Air Products, USA), 1,3,5-tris(dimethylaminopropyl) Base) 0.2 parts of hexahydrotriazine (Air Products, USA), 1 part of N,N-dimethylcyclohexylamine (Air Products, USA), 1.5 parts of surfactant AK-8801 (Nanjing Mesid) 17 parts of blowing agent HFC-365 / 227 (Solvay Company) (93:7), 2.5 parts of water, put into the reaction kettle, stir and mix for 2 hours and then discharge and seal the package;

[0050] The materials of components A and B are mixed and reacted according to the weight ratio of A:B=100:100 to prepare foam, and the quality of the product is tested.

[0051] Molding core densi...

Embodiment 3

[0059] Preparation of component A:

[0060] Accurately metered polyether polyol A (functionality 5.2, molecular weight 850) 44 parts, polyester polyol B (2 functionalities, molecular weight 670) 10 parts, vegetable oil polyol C (hydroxyl value 210) 30 parts, catalyst N , 0.8 part of N-dimethylcyclohexylamine (Air Chemicals Company of the United States), 0.4 part of N, N-dimethylbenzylamine (Air Chemicals Company of the United States), 0.2 part of bis(2-dimethylaminoethyl) ether 1.6 parts of surfactant L-5466 (Momentive Advanced Materials Group Co., Ltd.), 10 parts of foaming agent HFC-365mfc / 227ea (Solvay Company) (83:17), 3 parts of water put into the reaction kettle, stir and mix for 2 hours, then discharge and seal the package;

[0061] The materials of components A and B are mixed and reacted according to the weight ratio of A:B=100:100 to prepare foam, and the quality of the product is tested.

[0062] Molding core density: 37.1kg / m 3

[0063] Compressive strength: 20...

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Abstract

The invention discloses a polyurethane hard foam composite material and a preparation method thereof. The polyurethane hard foam composite material is composed of a component A and a component B. The component A is composed of 40-60 parts of polyether glycol A, 5-10 parts of polyester polyol B, 15-30 parts of vegetable oil polyalcohol, 1.0-2.0 parts of surfactant, 0.8-2.2 parts of catalyst, 2.0-3.0 parts of water and 10-20 parts of foaming agent HFC-365 mfc / 227ea. The component B is polymethylene polyphenyl polyisocyanate. The ratio of the component A to the component B is 1 / 1. The polyether glycol A is polyoxypropylene polyalcohol of which the functionality is 4-6 and the number-average molecular weight is 300-1000. The polyester polyol B is phthalic anhydride polyester polyol of which the functionality is 2 and the molecular weight is 300-700. The vegetable oil polyalcohol C is epoxy soybean oil polyalcohol of which the hydroxyl value is 200-500. The foam obtained by the composite material has the advantages of low heat conductivity coefficient, high compression strength, favorable dimensional stability and low cost.

Description

technical field [0001] The invention relates to the field of polyurethane, in particular to a polyurethane rigid foam composite material for solar water heaters. Background technique [0002] Polyurethane rigid foam is widely used to fill the interlayer cavity of the solar water heater tank because of its excellent thermal insulation performance. [0003] HCFC-141b is used in more than 90% of polyurethane foam insulation in the solar water heater industry. With the implementation of the third phase of the Montreal Convention, the phase-out of HCFC-141b will be accelerated. At present, there is no suitable alternative route in the field of solar water heaters, and it is imminent to develop a new generation of alternative technologies. [0004] At present, the potential alternatives to HCFC-141b are mainly three categories: all-water blowing agents, alkane blowing agents and hydrofluorocarbons (HFCs) blowing agents. [0005] Due to the high gas-phase thermal conductivity (λ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/42C08G18/36C08J9/08C08J9/14
CPCC08G18/36C08G18/4018C08G18/4208C08G18/4829C08G18/6629C08G18/7664C08J9/08C08J9/146C08J2203/10C08J2203/142C08J2203/202C08G2110/0025C08G2110/0033C08G2110/005
Inventor 李同续周鹏赵修文董火成
Owner LIMING RES INST OF CHEM IND