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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 reduced performance of polyurethane foam insulation, so as to improve temperature resistance, increase crosslinking degree, reduce The effect of poor temperature resistance

Active Publication Date: 2021-04-23
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
  • High-temperature-resistant creep-resistant pipeline thermal insulation material and preparation method thereof

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preparation example Construction

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

[0031] Stir and vacuum dehydrate the hydroxyl-terminated fluorine-containing polyester polysiloxane and hydroxyl-terminated polysiloxane at 100°C, then cool down to 50°C and add polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate , react at a temperature of 85°C to prepare a modified isocyanate, which is packaged for future 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 to diphenylmethane diisocyanate is 1:0.8, and the modification is controlled. The isocyanate NCO content is 25%.

[0032] The manufacturer of polyester polyol PS-3152 adopted in the embodiment is Nanjing Jinling Stepan Chemical Co., Ltd.; the manufacturer of foam stabilizer B84817 is Evonik Degussa Company of Germany; the manufacturer of poly...

Embodiment 1

[0034] (1) Component A: Weigh sucrose polyether polyol A (functionality: 5.7, hydroxyl value: 410±5mgKOH / g, viscosity at 25°C: 13500±100mpa·s, use sucrose and glycerin as composite initiators ) 44.4 parts, epoxy resin modified polyether polyol B30 parts, polyester polyol PS-3152 10 parts, 1,4 butanediol 4 parts, dodecyl glycol 3 parts, deionized water 3.6 parts, foam 3 parts of stabilizer B84817, 0.2 parts of trimethylhydroxyethylethylenediamine, 1 part of N,N-bis(dimethylaminopropyl)isopropanolamine, 2,4,6-tris(dimethylaminomethyl) ) 0.8 part of phenol, stirred evenly at normal temperature to obtain component A;

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

[0036] (3) Mixing and curing: When in use, mix and foam components A and B at a mass ratio of 1:1.5 to obtain high temperature and creep resistant pipeline insulation materials.

Embodiment 2

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

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

[0040] (3) Mixing and curing: when in use, mix and foam component A and component B at a mass ratio of 1:1.4 to obtain high temperature and creep resistant pipeline insulation materials.

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Abstract

The invention relates to the technical field of polyurethane thermal insulation materials, and particularly relates to a high-temperature-resistant creep-resistant pipeline thermal insulation material and a preparation method thereof. The high-temperature-resistant creep-resistant pipeline thermal insulation material is formed by mixing a component A and a component B according to the mass ratio of 1:(1.4-1.6), and the component A is composed of sucrose polyether polyol A, epoxy resin modified polyether polyol B, polyester polyol, a cross-linking agent, deionized water, a foam stabilizer and a catalyst; and the modified isocyanate is prepared by modifying a mixture of polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate by adopting one or two of hydroxyl-terminated fluorine-containing polyester polysiloxane and hydroxyl-terminated polysiloxane. The high-temperature-resistant creep-resistant pipeline thermal insulation material disclosed by the invention not only has excellent high-temperature dimensional stability, relatively low heat conductivity coefficient and good adhesive property, but also has good high-temperature resistance and creep resistance, and can meet the requirement of long-term high-temperature transportation. The invention also provides a preparation method of the high-temperature-resistant creep-resistant pipeline thermal insulation material.

Description

technical field [0001] The invention relates to the technical field of polyurethane thermal insulation materials, in particular to a heat-resistant and creep-resistant pipeline thermal insulation material and a preparation method thereof. Background technique [0002] Polyurethane 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 clean energy heating in cities, the new mode of centralized heating with large temperature difference and long-term transmission of heat and power is developing rapidly. High temperature and creep resistance put forward higher requirements. 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 pol...

Claims

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Application Information

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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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