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High temperature resistant creep resistant pipeline thermal insulation material and preparation method thereof

A pipeline insulation and creep resistance technology, applied in the field of polyurethane insulation materials, can solve the problems of decreased shear strength, waste of resources, and decreased performance of polyurethane foam insulation, to improve the degree of crosslinking, reduce poor temperature resistance, and improve The effect of temperature resistance

Active Publication Date: 2022-07-19
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After aging, the thermal conductivity of polyurethane foam will increase, and the shear strength will decrease. At the same time, under the action of external pressure, large creep deformation will occur, resulting in a significant decrease in the thermal insulation performance of polyurethane foam, which will greatly affect the heating effect and cause resource loss. waste

Method used

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  • High temperature resistant creep resistant pipeline thermal insulation material and preparation method thereof
  • High temperature resistant creep resistant pipeline thermal insulation material and preparation method thereof

Examples

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preparation example Construction

[0030] The preparation method of the modified isocyanate adopted in the embodiment is:

[0031] First, the hydroxyl-terminated fluorine-containing polyester polysiloxane and hydroxyl-terminated polysiloxane were stirred and vacuum dehydrated at a temperature of 100 °C, and then cooled to 50 °C, and polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate were added. , the modified isocyanate was prepared by reacting at a temperature of 85° C., and the package was encapsulated for later use. Among them, the addition amount of hydroxyl-terminated fluorine-containing polyester polysiloxane and hydroxyl-terminated polysiloxane is 15%, and the mass ratio of polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate is 1:0.8. The isocyanate NCO content was 25%.

[0032] The polyester polyol PS-3152 used in the examples is produced by Nanjing Jinling Stepan Chemical Co., Ltd.; the foam stabilizer B84817 is produced by German Evonik Degussa; Novo New Ma...

Embodiment 1

[0034] (1) Component A: Weigh sucrose polyether polyol A (functionality is 5.7, hydroxyl value is 410±5mgKOH / g, viscosity at 25°C is 13500±100mpa·s, and sucrose and glycerol are used as composite initiators ) 44.4 parts, 30 parts of epoxy resin modified polyether polyol B, 10 parts of polyester polyol PS-3152, 4 parts of 1,4 butanediol, 3 parts of dodecanediol, 3.6 parts of deionized water, foam 3 parts of stabilizer B84817, 0.2 part of trimethylhydroxyethylethylenediamine, 1 part of N,N-bis(dimethylaminopropyl)isopropanolamine, 2,4,6-tris(dimethylaminomethyl) ) 0.8 part of phenol, stir evenly at normal temperature to obtain A component;

[0035] (2) B component: weigh 70 parts of polymethylene polyphenyl polyisocyanate and 30 parts of modified isocyanate, and stir evenly at normal temperature to obtain B component;

[0036] (3) Mixing and curing: When in use, the A component and the B component are mixed and foamed according to the mass ratio of 1:1.5, that is, the high temp...

Embodiment 2

[0038] (1) Component A: Weigh sucrose polyether polyol A (functionality is 5.6, hydroxyl value is 400±5mg KOH / g, viscosity at 25°C is 13000±100mpa·s, and sucrose and glycerol are used as compound starter agent) 55 parts, epoxy resin modified polyether polyol B12 parts, polyester polyol PE-B503L 15 parts, 1,3 butanediol 4 parts, dodecanediol 5 parts, deionized water 3.8 parts, 3 parts of foam stabilizer B84817, 0.4 part of trimethylhydroxyethylethylenediamine, 0.9 part of N,N-bis(dimethylaminopropyl)isopropanolamine, 2,4,6-tris(dimethylaminomethyl) base) 0.9 part of phenol, stir evenly at room temperature to obtain component A;

[0039] (2) B component: weigh 80 parts of polymethylene polyphenyl polyisocyanate and 20 parts of modified isocyanate, and stir evenly at normal temperature to obtain B component;

[0040] (3) Mixing and curing: When in use, the A component and the B component are mixed and foamed according to the mass ratio of 1:1.4, that is, the high temperature res...

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Abstract

The invention relates to the technical field of polyurethane thermal insulation materials, in particular to a high temperature-resistant creep-resistant pipeline thermal insulation material and a preparation method thereof. The high temperature resistant and creep resistant pipeline insulation material is composed of A component and B component mixed in a mass ratio of 1:1.4-1.6, and A component is composed of sucrose polyether polyol A, epoxy resin modified polyether Polyol B, polyester polyol, cross-linking agent, deionized water, foam stabilizer, catalyst; modified isocyanate is one of hydroxyl-terminated fluorine-containing polyester polysiloxane and hydroxyl-terminated polysiloxane. It is prepared by modifying one or two mixtures of polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate. The high-temperature-resistant and creep-resistant pipeline insulation material of the present invention not only has excellent high-temperature dimensional stability, low thermal conductivity, and good bonding performance, but also has good high-temperature resistance and creep resistance, and can meet the requirements of long-term high-temperature transportation. requirements; the present invention also provides its preparation method.

Description

technical field [0001] The invention relates to the technical field of polyurethane thermal insulation materials, in particular to a high temperature-resistant creep-resistant pipeline thermal insulation material and a preparation method thereof. Background technique [0002] Polyurethane thermal insulation materials are widely used in heat pipe network transportation due to their low thermal conductivity and simple processing technology. With the demand and development of urban clean energy heating, the new mode of central heating with large temperature difference and long-term transmission and cogeneration has developed rapidly. High temperature and creep resistance put forward higher requirements. After aging, the thermal conductivity of the polyurethane foam will increase, and the shear strength will decrease. At the same time, it will be subjected to external pressure, resulting in a large creep deformation, which will lead to a significant decrease in the thermal insu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/77C08G18/76C08G18/66C08G18/48C08G18/42C08G18/32C08G18/18C08G101/00
Inventor 徐军刘玄边宪磊魏光曦殷守相
Owner SHANDONG INOV NEW MATERIALS CO LTD
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