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Low-temperature impact-resistant heat-insulating coating and preparation method thereof

A heat-insulating coating, impact-resistant technology, applied in coatings, powder coatings, polyester coatings, etc., can solve problems such as easy wear and peeling, adverse effects on pipes, and insufficient impact resistance of coatings

Inactive Publication Date: 2019-08-30
SHANGHAI NAXU IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, in outdoor applications, the impact resistance of the coating is not enough, it is easy to wear and peel off, which will have an adverse effect on pipeline transportation. Therefore, it is necessary to strengthen the low-temperature impact resistance of the coating through toughening to improve the life of the coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A low-temperature impact-resistant heat-insulating coating, prepared by the following method:

[0025] 1) Grind 1000g of polyester, 100g of polypropylene, 10g of toughener and 1g of antioxidant at low temperature until the fineness is enough to pass through a 40-mesh sieve, then mix the four kinds of powders and add them to the twin-screw extruder For co-extrusion, the screw length-to-diameter ratio L / D=42, the temperature in the main processing area is 180°C, and the screw speed is 150rpm; the obtained slices are mixed with 50g of curing agent and then crushed at low temperature, and the obtained powder is passed through a 200-mesh sieve.

[0026] 2) Electrostatic spraying molding: Take 200 mesh powder and carry out electrostatic spraying on the aluminum plate to obtain a dry powder coating with a certain adhesion thickness. Put the powder plate in an oven and start heating up to 190°C. It is observed that when the surface of the powder layer starts to melt, the powder...

Embodiment 2

[0029] A low-temperature impact-resistant heat-insulating coating, prepared by the following method:

[0030] 1) Grind 1000g of polyester, 600g of polypropylene, 150g of toughening agent and 12g of antioxidant at low temperature until the fineness is enough to pass through a 40-mesh sieve, then mix the four kinds of powders and add them to the twin-screw extruder For co-extrusion, the length-to-diameter ratio of the screw is L / D=42, the temperature in the main processing zone is 220°C, and the screw speed is 250rpm. The obtained chips are mixed with 100g of curing agent and then pulverized at low temperature, and the obtained powder is passed through a 200-mesh sieve;

[0031] 2) Electrostatic spraying molding: Take 200 mesh powder and carry out electrostatic spraying on the aluminum plate to obtain a dry powder coating with a certain thickness. Put the powder plate in an oven and start heating up to 220°C. When it is observed that the surface of the powder layer starts to me...

Embodiment 3

[0033] A low-temperature impact-resistant heat-insulating coating, prepared by the following method:

[0034] 1) Grind 1000g of polyester, 400g of polypropylene, 90g of toughening agent and 10g of antioxidant at low temperature until the fineness is enough to pass through a 40-mesh sieve, then mix the four kinds of powders and add them to the twin-screw extruder Carry out co-extrusion, screw length-to-diameter ratio L / D=42, main processing zone temperature 200°C, screw speed 220rpm, the obtained slices are mixed with 80g of curing agent and then crushed at low temperature, and the obtained powder passes through a 200-mesh sieve.

[0035] 2) Electrostatic spraying molding: Take 200 mesh powder and carry out electrostatic spraying on the aluminum plate to obtain a dry powder coating with a certain thickness. Put the powder plate in an oven and start heating up to 210°C. When the surface of the powder layer begins to melt, the vacuum is drawn, and the powder layer begins to foam....

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PUM

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Abstract

The invention discloses a low-temperature impact-resistant heat-insulating coating and a preparation method thereof. The coating is a low-temperature impact-resistant foam coating, and the coating comprises the following components: 100 parts of a polyester, 5-10 parts of a curing agent, 10-60 parts of polypropylene, 1-15 parts of a toughening agent and 0.1-1.2 parts of an antioxidant, wherein thepolyester is a carboxyl-terminated polyester, and the curing agent is triglycidyl isocyanurate (TGIC). The preparation method comprises the following steps: firstly, mixing the polyester, the polypropylene, the toughening agent and the antioxidant, performing extrusion by using a twin-screw extruder, adding the curing agent, performing electrostatic spraying, performing heating and vacuumizationby utilizing a negative-pressure foaming mechanism, and controlling sizes of pores in the resin to obtain the foam heat-insulating coating with a certain pore size. The method provided by the invention improves the heat-insulating effect through the foaming process, and the coating has good low-temperature impact resistance through toughening.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a low-temperature impact-resistant and heat-insulating coating and a preparation method thereof. Background technique [0002] In recent years, as the attention to energy-saving and environment-friendly buildings continues to heat up, building thermal insulation coatings have also received more and more attention. Excellent building thermal insulation coatings can effectively prevent heat conduction, reduce the temperature of the surface coating and the internal environment, thereby achieving the purpose of improving the working environment and reducing energy consumption. Therefore, it is widely used in steel structure doors and windows, petrochemical oil and gas storage tanks, and communication base stations , granaries, ship decks, automobile shells and other fields. [0003] As one of the major categories, barrier heat-insulating coatings are passive co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D123/14C09D7/65C09D5/03
CPCC08L2205/03C09D5/033C09D167/00C08L23/14C08L23/0815
Inventor 何丹农陈超王敬锋林琳金彩虹
Owner SHANGHAI NAXU IND