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Economic and environment-friendly polyurethane thermal insulation foam and preparation method thereof

A polyurethane, environmentally friendly technology, applied in the field of polyurethane, can solve the problems of expensive foaming agent, unfavorable product development and application, etc., and achieve the effects of excellent foam dimensional stability and low cost

Inactive Publication Date: 2021-01-22
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such foaming agents are very expensive, which is not conducive to the development and application of products.

Method used

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  • Economic and environment-friendly polyurethane thermal insulation foam and preparation method thereof
  • Economic and environment-friendly polyurethane thermal insulation foam and preparation method thereof
  • Economic and environment-friendly polyurethane thermal insulation foam and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0056] In the second aspect, the present application provides a method for preparing the above-mentioned economical and environment-friendly polyurethane thermal insulation foam, which is characterized in that the method comprises the following steps: combining the polyether polyol and the isocyanate under high pressure Mix in a foam machine, and obtain the polyurethane thermal insulation foam after foaming.

[0057] In an embodiment of the second aspect, the foaming temperature is room temperature, and the injection flow rate of the combined polyether polyol and the isocyanate is 30 g / s during foaming.

[0058] On the basis of not violating common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain preferred examples of the present invention.

[0059] The reagents and raw materials used in the present invention are all commercially available.

[0060] Percentages in the present invention are the mass percentages of each comp...

Embodiment 1-5

[0080] The types and amounts of raw materials for the combined polyether polyols of Examples 1-5 are shown in Table 1 below.

[0081] Table 1 Components and contents of the combined polyether polyols of Examples 1-5.

[0082]

[0083]

[0084] The steps of preparing combined polyether polyols include: weighing polyether polyols, polyester polyols, catalysts, silicone oil, water, flame retardants, and foaming agents in a reaction kettle, and stirring evenly to obtain combined polyether polyols. Polyol.

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Abstract

The invention relates to economic and environment-friendly polyurethane thermal insulation foam which is prepared from combined polyether polyol and isocyanate, and the combined polyether polyol comprises the following components in parts by weight: 20-80 parts of polyether polyol; 20-80 parts of a polyester polyol; 3-4 parts of a catalyst; 2-3 parts of a foam stabilizer; 10-15 parts of a foamingagent; 1.5-2 parts of water; and 10-20 parts of a flame retardant. wherein the polyether polyol is prepared from one or more of Donol 4037, Donol 6207, Donol 6049, Donol 8238 and FR901B, and the polyester polyol is prepared from one or more of AK 7004, PS 3020, PEB 503L and PEB 175; the foaming agent is a pentane foaming agent; and the mass ratio of the combined polyether polyol to the isocyanateis 1 : (1.15-1.25). The invention further relates to a preparation method of the economical and environment-friendly polyurethane thermal insulation foam. The flame retardant property of the polyurethane foam meets B2-grade requirements, the size stability is good, the heat conductivity coefficient is low, and the 24-hour energy consumption value is superior to the value 0.7 required by the national standard.

Description

technical field [0001] The present application relates to the field of polyurethane technology. Specifically, the application relates to a combined polyether polyol for electric water heaters, an economical and environment-friendly polyurethane thermal insulation foam and a preparation method thereof. Background technique [0002] Starting from the second half of 2019, the entire electric water heater industry has undergone a full-scale transformation. The rigid polyurethane foam used for electric water heaters has been changed to a flame-retardant material, thereby improving the safety performance of household electric water heaters. [0003] As we all know, polyurethane rigid foam is widely used in many fields because of its excellent thermal insulation performance. The traditional polyurethane rigid foam material is non-flame retardant, and its oxygen index is about 19%. It is easy to burn after encountering an open flame. The toxic gas released during the combustion pro...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/42C08J9/14C08K5/521C08G101/00C08L75/04
CPCC08G18/4018C08G18/48C08G18/42C08G18/4804C08G18/4202C08J9/141C08K5/521C08G2101/00C08J2203/14C08J2375/04
Inventor 魏路周剑平李学庆李翔
Owner SHANGHAI DONGDA POLYURETHANE
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