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All-water one-step flexible thermal insulation pipe material and preparation method thereof

A thermal insulation pipe and step method technology, which is applied in the field of all-water one-step flexible thermal insulation pipe material and its preparation, can solve the problems of destroying the ozone layer of the atmosphere, deteriorating thermal insulation performance, high foam brittleness, etc., so as to improve production stability and reduce reaction heat. , the effect of fine cell structure

Inactive Publication Date: 2020-04-07
SHANDONG INOV NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the combined polyether used for flexible one-step pipelines has the problem of high foam brittleness. The foam is easily damaged during installation and transportation, resulting in a decrease in insulation performance. When producing a thicker insulation layer, there is a risk of heartburn and cracking. Happened, conventional products usually use HCFC-141B (a fluorodichloroethane) blowing agent, which destroys the atmospheric ozone layer and has begun to be phased out

Method used

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  • All-water one-step flexible thermal insulation pipe material and preparation method thereof
  • All-water one-step flexible thermal insulation pipe material and preparation method thereof
  • All-water one-step flexible thermal insulation pipe material and preparation method thereof

Examples

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Effect test

preparation example Construction

[0032] Preparation of modified isocyanates:

[0033] Stir butanediol and polyethylene glycol at a temperature range of 100±10°C, vacuum dehydrate for 3 hours, cool down to 55°C, add a mixture of polymethylene polyphenyl polyisocyanate and diphenylmethane diisocyanate, at 85 ℃ reaction to prepare modified isocyanate, which is packaged for later use.

[0034] All used in the examples are parts by mass.

Embodiment 1

[0036] (1) Preparation of component A: Weigh sucrose polyether polyol A (functionality 5.1, hydroxyl value 340mg KOH / g, viscosity at 25°C 2360mPa.s, starting with sucrose and glycerin) agent) 50 parts, R403715 parts, C310 14 parts, PS-3152 10 parts, deionized water 4.0 parts, B8534 3 parts, pentamethyldiethylenetriamine 1 part, triethylenediamine 1.5 parts, potassium acetate 1.1 part, 0.4 part of 1,3,5-tris(dimethylaminopropyl)hexahydrotriazine, stir and mix at room temperature, stir for 1 hour, take it out for inspection, and if it meets the set foaming parameters, it can be packed into a bucket for later use;

[0037] (2) Preparation of component B: weigh 70 parts of polymethylene polyphenyl polyisocyanate and 30 parts of modified isocyanate, stir evenly, and package for later use;

[0038] (3) Mixing and curing: Mix A component and B component in a foaming machine according to the mass ratio of A:B=1:1.5.

[0039] The indicators of test foam products are as follows:

[00...

Embodiment 2

[0048] (1) Preparation of component A: Weigh sucrose polyether polyol A (functionality 5.3, hydroxyl value 330mg KOH / g, viscosity at 25°C 2260mPa.s, starting with sucrose and propylene glycol agent) 43 parts, R403710 parts, C310 20 parts, PS-3152 15 parts, deionized water 3.5 parts, B8534 5 parts, bis(dimethylaminoethyl) ether 0.2 parts, N,N-dimethylcyclohexylamine 0.7 parts, 1.3 parts of dimethylbenzylamine, and 1.3 parts of potassium isooctanoate are stirred and mixed at room temperature, stirred for 0.5-1.5 hours, taken out for inspection, and can be packed into barrels for later use if they meet the set foaming parameters;

[0049] (2) Preparation of component B: weigh 90 parts of polymethylene polyphenyl polyisocyanate and 10 parts of modified isocyanate, stir evenly, and package for later use;

[0050] (3) Mixing and curing: Mix A component and B component in a foaming machine according to the mass ratio of A:B=1:1.3.

[0051] The indicators of test foam products are as...

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Abstract

The invention belongs to the technical field of polyurethane synthetic materials, and particularly relates to an all-water one-step flexible thermal insulation pipe material and a preparation method thereof. The all-water one-step flexible thermal insulation pipe material comprises a component A and a component B, wherein the component A comprises the following raw material in parts by mass: 45-55parts of sucrose polyether polyol A, 5-15 parts of aromatic amine polyether polyol B, 10-20 parts of low-functionality polyether polyol C, 10-20 parts of polyester polyol D, 3.5-4.1 parts of deionized water, 3-5 parts of a foam stabilizer and 2.9-20 parts of a catalyst;and the component B comprises the following raw materials in parts by mass: 70-90 parts of polymethyl polyphenyl polyisocyanate and 10-30 parts of modified isocyanate. On the premise that certain strength is guaranteed, a prepared thermal insulation pipe further has flexibility, and the problems of internal core burning and cracking are avoided; the invention also provides a simple and feasible preparation method.

Description

technical field [0001] The invention belongs to the technical field of polyurethane synthetic materials, and in particular relates to an all-water one-step flexible insulation pipe material and a preparation method thereof. Background technique [0002] Polyurethane insulation pipes are widely used in heat pipe network transportation. The working pipes in the secondary pipe network are basically made of steel and hard plastic materials without flexibility. During the construction process, a large number of joints and elbows are required, which increases the difficulty of construction. At the same time, the steel pipe is easy to corrode, which seriously affects the service life of the insulation pipe. The flexible pipe material has the characteristics of convenient transportation and flexible operation. The maximum pipe diameter is DN250, and the operating temperature of the pipe is within 90°C, which can meet the use of the secondary pipe network. This kind of pipeline has ...

Claims

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Application Information

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IPC IPC(8): C08G18/48C08G18/50C08G18/42C08G101/00
CPCC08G18/42C08G18/48C08G18/482C08G18/4825C08G18/4829C08G18/5021C08G2110/0083
Inventor 刘玄李欣李晓芳王许
Owner SHANDONG INOV NEW MATERIALS CO LTD
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