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Polyurethane rigid foam material for water storage electric water heater and preparation method thereof

A polyurethane rigid foam and electric water heater technology, applied in the field of polyurethane, can solve the problems of high thermal conductivity of cyclopentane and water, reduced water storage capacity of water tank, and failure to meet ODP requirements, etc., to achieve good airtightness, increased water storage capacity, and low odor Effect

Active Publication Date: 2019-10-25
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, various manufacturers have successively launched 141b, whole water, cyclopentane and other combined polyethers. However, 141b still cannot meet the ODP requirements
Up to now, domestic and foreign large-scale brand water heaters generally use cyclopentane or water as the foaming material. Although they meet the ODP requirements, the thermal conductivity of cyclopentane and water are relatively high.
In order to achieve a good thermal insulation effect, many manufacturers have to increase the thickness of the thermal insulation layer. However, this directly leads to a reduction in the water storage capacity of the water tank. Users can only use bulky water heaters and perform multiple heatings to meet the demand for hot water consumption.

Method used

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  • Polyurethane rigid foam material for water storage electric water heater and preparation method thereof
  • Polyurethane rigid foam material for water storage electric water heater and preparation method thereof
  • Polyurethane rigid foam material for water storage electric water heater and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of component A:

[0033] The raw material composition of component A is shown in Table 1.

[0034] A component raw material composition in the embodiment 1 of table 1

[0035]

[0036]

[0037] Add the above-mentioned raw materials (except foaming agent) weighed into the reaction kettle, stir at room temperature for 0.5h, mix thoroughly, then add foaming agent, and mix thoroughly for 1h, and weigh 100kg after mixing. The foaming agent is a mixed foaming agent of cyclopentane, isopentane, and HFC-245fa at a ratio of 50:15:35.

[0038] (2) Preparation of component B: Weigh 120 kg of Yantai Wanhua PM200.

[0039] (3) The components A and B are uniformly mixed and foamed by a high-pressure machine according to the mass ratio of 1:1.2, and injected into a 300mm×300mm×100mm mold, and the molded foam density is 38.6kg / m 3 , the polyurethane rigid foam material was obtained, and the product quality index obtained is shown in Table 4.

Embodiment 2

[0041] (1) Preparation of component A:

[0042] The raw material composition of component A is shown in Table 2.

[0043] A component raw material composition in the embodiment 2 of table 2

[0044]

[0045] Add the above-mentioned raw materials (except foaming agent) weighed into the reaction kettle, stir at room temperature for 0.5 hours, mix thoroughly, then add foaming agent, and mix thoroughly for 1 hour. Weigh 100kg after mixing. The foaming agent is a mixed foaming agent of cyclopentane, isopentane, and HFC-245fa at a ratio of 50:15:35.

[0046] (2) Preparation of component B: Weigh 120 kg of 44V20 from Bayer, Germany.

[0047] (3) The components A and B are uniformly mixed and foamed by a high-pressure machine according to the mass ratio of 1:1.2, and injected into a 300mm×300mm×100mm mold, and the molded foam density is controlled at 36.6kg / m 3 , the polyurethane rigid foam material was obtained, and the product quality index obtained is shown in Table 4.

Embodiment 3

[0049] (1) Preparation of component A:

[0050] The raw material composition of component A is shown in Table 3.

[0051] A component raw material composition in the embodiment 3 of table 3

[0052]

[0053] Add the above-mentioned raw materials (except foaming agent) weighed into the reaction kettle, stir at room temperature for 0.5 hours, mix thoroughly, then add foaming agent, and mix thoroughly for 1 hour. Weigh 100kg after mixing. The foaming agent is a mixed foaming agent of cyclopentane, isopentane, and HFC-245fa at a ratio of 50:15:35.

[0054] (2) Preparation of component B: Weigh 120 kg of Yantai Wanhua PM200.

[0055](3) The components A and B are uniformly mixed and foamed by a high-pressure machine according to the mass ratio of 1:1.2, and injected into a 300mm×300mm×100mm mold, and the molded foam density is controlled at 35.4kg / m 3 , the polyurethane rigid foam material was obtained, and the product quality index obtained is shown in Table 4.

[0056] Th...

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Abstract

The invention belongs to the technical field of polyurethane, and particularly relates to polyurethane combined polyester of a water storage type electric water heater and a preparation method and application thereof. The combined polyester consists of a component A and a component B according to a mass ratio of 1:(1 to 1.3), wherein the component A is prepared from the following raw materials in percentage by mass: 21 to 27% of polyether polyol I, 11 to 22% of polyether polyol II, 10 to 15% of polyether polyol III, 7 to 15% of polyether polyol IV, 15 to 20% of polyester polyol, 1 to 1.5% of foam stabilizer, 13 to 15% of foamer, 2 to 3% of catalyst, and 0.5 to 2.0% of water; the component B is polymethylene polyphenyl isocyanate. The combined polyester product has the advantages that the destruction to an ozone sphere is avoided, the environment-friendly property is excellent, the preparation method is simple, the prepared polyurethane foam has a low heat conduction coefficient, the sealing property is good, the strength is high, and the water absorbing rate and use stability are good.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a rigid polyurethane foam material for a water storage electric water heater and a preparation method thereof. Background technique [0002] According to the heating power, electric water heaters can be divided into three types: water storage type (also known as volumetric or heat storage type), instant heating type, and rapid heating type (also known as semi-water storage type). Water storage type electric water heaters are more commonly used. From the perspective of electric water heater products, the product structure continues to be adjusted, showing an upgrading trend: first, high-end, the market share of water heaters above 3,000 yuan has increased to 18%; second, the volume is large, and the proportion of 60L water storage products is growing rapidly. ; The third is beautiful, the square machine of water storage water heater occupies more than 10% of the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C08G18/50C08G18/42C08J9/14C08G101/00
CPCC08G18/4018C08G18/4208C08G18/4816C08G18/482C08G18/4883C08G18/5027C08G18/7664C08G2101/00C08J9/141C08J9/146C08J9/149C08J2203/14C08J2203/142C08J2203/202C08J2375/06C08J2375/08
Inventor 周生鹏徐业峰李欣殷晓峰杜孝林
Owner SHANDONG INOV NEW MATERIALS CO LTD
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