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A box-type foaming combined polyether and polyurethane foam and its preparation method

A combination of polyether and box-type foaming technology, applied in the field of materials, can solve the problems of high fluidity and density distribution of polyurethane raw materials, poor foam products, shrinkage of products, etc., to achieve excellent density distribution, performance balance, foam The effect of fine and uniform holes

Active Publication Date: 2019-12-31
SHANGHAI DONGDA POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Slab foam production molds generally have a length of 2-4m, a width of 0.5-1.5m, and a height of 40-70cm. Since the size of the mold is generally large and the height of the raw material to be climbed is also high, the fluidity and The density distribution is required to be high, and excessive density distribution will also lead to the appearance of defective products in the foam, especially the performance of the foam in the three directions of length, width and height will be quite different, which will lead to shrinkage of the product after the foam is cut into a shell, Deformation and other phenomena

Method used

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  • A box-type foaming combined polyether and polyurethane foam and its preparation method
  • A box-type foaming combined polyether and polyurethane foam and its preparation method
  • A box-type foaming combined polyether and polyurethane foam and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Prepare the first component according to the ingredients in the table below

[0059] raw material name Mass parts / parts PN400 10 Ixol B251 20 CF-8240 70 PP30 8 TCD tricyclic diol 4 B8462 4 Dabco DMDEE 0.8 Dabco TMR-31 1.7 Dabco TMR-35 2.5 TCPP 50 Deionized water 2 HCFC-141b 35

[0060] Pour the raw materials mentioned in the above table into the container according to the specified ratio, and mix them evenly with an electric mixer to make the first component; then pour the first component and the second component into the container according to the weight ratio of 1:1.6 , then use an electric mixer to stir for 8 seconds, pour the evenly mixed liquid into a mold with a constant temperature of 45-50°C, close the mold, place it at a constant temperature of 45°C for 6 hours, and then open the mold to obtain the Polyurethane slabstock foam.

Embodiment 2

[0062] Prepare the first component according to the ingredients in the table below

[0063] raw material name Mass parts / parts PN400 20 Ixol B251 20 CF-8240 60 PP50 6 Dodecyl cycloalkanediol 4 AK8809 2 Jeffcat ZF-10 0.9 Dabco BDMA 1 PC CAT NP40 2.3 DEEP 25 Deionized water 1.5 HFC-365mfc 47

[0064] Pour the raw materials mentioned in the above table into the container according to the specified ratio, and mix them evenly with an electric mixer to make the first component; then pour the first component and the second component into the container according to the weight ratio of 1:1.8 , then use an electric mixer to stir for 8 seconds, pour the evenly mixed liquid into a mold with a constant temperature of 45-50°C, close the mold, place it at a constant temperature of 45°C for 6 hours, and then open the mold to obtain the Polyurethane slabstock foam.

Embodiment 3

[0066] Prepare the first component according to the ingredients in the table below

[0067]

[0068]

[0069] Pour the raw materials mentioned in the above table into the container according to the specified ratio, and mix them evenly with an electric mixer to make the first component; then pour the first component and the second component into the container according to the weight ratio of 1:1.9 , then use an electric mixer to stir for 8 seconds, pour the evenly mixed liquid into a mold with a constant temperature of 45-50°C, close the mold, place it at a constant temperature of 45°C for 6 hours, and then open the mold to obtain the Polyurethane slabstock foam.

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Abstract

The present application relates to a box-type foaming combined polyether. The foaming combined polyether is prepared from a first polyether polyol; a second polyether polyol; polyester polyols; a cross-linking agent; a chain extender; a foam stabilizer; a composite catalyst; a chemical foaming agent; a physical foaming agent and an optional flame retardant. The application also provides polyurethane foam prepared from the box-type foaming combined polyether. The present application also provides a method for preparing the polyurethane foam. According to the invention, the beneficial effects are that the polyurethane block foam product provided by the application has excellent density distribution and uniform performance in various directions, and can be used for heat preservation of civiland industrial pipelines after numerical control cutting, the foam pores of the product are fine and uniform, the heat preservation effect is good, deformation does not occur after long-term placing,and the weather resistance is strong.

Description

technical field [0001] This application relates to the field of materials technology. Specifically, the present application relates to a box-type foaming combination polyether, a polyurethane foam prepared by using the box-type foaming combination polyether, and a method for preparing the polyurethane foam. Background technique [0002] With the acceleration of the development of my country's infrastructure and large-scale engineering construction projects, people pay more and more attention to facility protection and thermal insulation, especially in petrochemical thermal insulation projects, pipelines and tanks need to be thermally insulated, which can reduce the heat of the system losses and save energy. Polyurethane is a new type of thermal insulation material, which has the characteristics of light weight, low thermal conductivity and good weather resistance, and stands out in the petroleum and petrochemical thermal insulation industry. [0003] Generally speaking, pip...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/14C08K5/521C08G18/48C08G18/42C08G18/32C08G18/66
CPCC08G18/32C08G18/3212C08G18/4018C08G18/4208C08G18/4829C08G18/6611C08J9/0038C08J9/144C08J9/146C08J2203/142C08J2203/162C08K5/521C08G2110/005
Inventor 于楠徐军郭磊信延垒魏路
Owner SHANGHAI DONGDA POLYURETHANE
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