Super-strong explosion-proof impact-resistant composite coating and preparation method thereof

A composite coating and impact-resistant technology, applied in the field of coatings, can solve the problems of poor dispersion of fillers, difficulty in dispersing graphene, and difficulty in reaching the ideal level, so as to achieve excellent tensile strength and avoid expensive effects

Active Publication Date: 2021-06-18
LIAOYANG YIBANG NEW BUILDING MATERIALS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As CN104497823A discloses a kind of anti-explosion energy-absorbing polyurea elastic coating and preparation method, because this method is to directly add common filler carbon black, titanium dioxide in amino-terminated polyether and amino-terminated chain extender, cause the dispersibility of filler to be relatively poor , which directly affects the mechanical properties of the coating
CN 108192493 A discloses a preparation method of graphene and carbon nanotube reinforced anti-corrosion and bulletproof coatings. In order to improve the dispersibility of inorganic nanofillers graphene and carbon nanotubes, the method introduces disperse agent, and in order to reduce the viscosity, an inert diluent silicone oil is also added. Although it is helpful for the dispersion of inorganic nano fillers, the dispersant and inert diluent do not participate in the chemical reaction, which is unfavorable to the film strength and modulus of the coating.
[0004] CN 111548712 A discloses fast-curing polyurea explosion-proof coating for buildings and its preparation method and CN106753151 A discloses an explosion-proof impact polyurea coating and its preparation method. These two coatings meet the explosion-proof impact performance to a certain extent, but In order to take into account low temperature flexibility, the amount of graphene added should not be too much, and the mechanical properties of tensile strength and tear strength cannot be taken into account at the same time. At the same time, graphene is difficult to disperse. Although it has been modified, the actual dispersion is still difficult to reach the ideal level. The strength is less than 145N / mm, which limits its performance improvement and cannot meet the requirements of explosion-proof and impact-resistant applications with both tensile strength and tear strength.

Method used

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  • Super-strong explosion-proof impact-resistant composite coating and preparation method thereof
  • Super-strong explosion-proof impact-resistant composite coating and preparation method thereof
  • Super-strong explosion-proof impact-resistant composite coating and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0047] 1.1) Composition of A component and B component of flexible coating material

[0048] A component:

[0049] MDI50 59kg;

[0050] Polytetrahydrofuran ether glycol (PTMG-1000) 41kg;

[0051] B component:

[0052]

[0053] 1.2) Preparation of component A

[0054] In the reaction flask containing 59kg of MDI-50, feed nitrogen gas, start stirring, raise the temperature to 50°C, and add 41kg of preheated PTMG-1000 in two batches, with an interval of 10 minutes between the two batches. Raise the temperature to 75°C to 95°C, continue to react for 3 hours, take a sample to measure the -NCO end group content in the semi-prepolymer is 16.1%, stop heating to obtain component A of the semi-prepolymer, place it in a closed container, degas and inflate Nitrogen for use.

[0055] 1.3) Preparation of component B

[0056] First add 15kg of polyetheramine CAD2000 and 0.5kg of KH550 silane coupling agent into the dispersion tank, stir at 300 rpm for 5 minutes, increase the speed t...

Embodiment 2

[0084] Repeat the A component, B component, C component, D component preparation steps and the preparation of composite coating of embodiment 1, only change A component, B component, C component, D component raw material allotment amount , other with embodiment 1. Raw material dosage range adjustment:

[0085] 1.1) Composition of A component and B component of flexible coating material

[0086] A component: MDI50 56.5kg, polytetrahydrofuran ether glycol (PTMG-1000) 43.5kg.

[0087] Component B: dimethylthiotoluenediamine (DMTDA) 20kg, N,N'-bis-sec-pentylcyclohexanediamine (Jefflink754) 18.5kg; polyetheramine CAT-5000 15kg, polyetheramine CAD2000 38.6kg ; KH550 silane coupling agent 0.5kg; active whisker silicon (GX-SiO 2 ) 5kg; special carbon black slurry 2.3kg; BYK-0230.05kg; BYK-410 0.05kg.

[0088] 1.2) Preparation of component A

[0089] Into the reaction flask containing 56.5kg of MDI-50, feed nitrogen gas, start stirring, raise the temperature to 50°C, and add 43.5kg ...

Embodiment 3

[0107] Repeat the A component, B component, C component, D component preparation steps and the preparation of composite coating of embodiment 1, only change A component, B component, C component, D component raw material allotment amount , other with embodiment 1. Raw material dosage range adjustment:

[0108] 1.1) Composition of A component and B component of flexible coating material

[0109] A component: MDI-100 66.2kg, polytetrahydrofuran ether glycol (PTMG-1000) 33.8kg.

[0110] Component B: N,N'dialkylphenylenediamine (Unilink 4100) 35kg, N,N'-bis-sec-pentylcyclohexanediamine (Jefflink754) 15kg; polyetheramine CAT-5000 2kg, polyetheramine CAD2000 43.4kg; KH550 silane coupling agent 0.5kg; activated calcium sulfate whisker (NP-M02) 3kg; special carbon black paste 1kg; BYK-0230.05kg; BYK-410 0.05kg.

[0111] 1.2) Preparation of component A

[0112] Into the reaction flask containing 66.2kg of MDI-100, feed nitrogen gas, start stirring, raise the temperature to 50°C, an...

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Abstract

The invention provides a super-strong explosion-proof impact-resistant composite coating and a preparation method thereof, the composite coating provided by the invention is formed by alternately spraying a flexible coating material and a rigid coating material, the number of sprayed coating layers is 2n + 1, and n is a positive integer; the preparation method comprises the following steps that two high-pressure spraying devices alternately work to conduct wet-on-wet laminated spraying, one high-pressure spraying device is used for spraying a flexible coating material, and the other high-pressure spraying device is used for spraying a rigid coating material; the thickness of each spraying film ranges from 0.10 mm to 0.80 mm; a flexible coating material is firstly sprayed to form a first coating, then a rigid coating material is sprayed to form a second coating, then the flexible coating material is sprayed on the second coating, the flexible coating and the rigid coating are alternately sprayed, and the spraying interval time is shorter than the gelation time of the coating. The coating has ultrahigh tensile strength, tearing strength and the like, also has good mechanical properties such as low-temperature flexibility and elongation at break, is good in comprehensive performance, and meets the field requirements with higher explosion-proof and impact-resistant requirements.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a super-strong explosion-proof and impact-resistant composite coating and a preparation method thereof. Background technique [0002] Polyurea elastomer coating organically combines the excellent performance of polyurea with the construction method of rapid spraying and on-site curing, so that it shows incomparable advantages in engineering applications. Compared with traditional coatings, spray polyurea elastomer materials have the characteristics of no solvent, fast curing, insensitivity to humidity and temperature, short construction period, wear resistance, impact resistance and excellent mechanical properties. Shipbuilding, water conservancy, transportation, machinery, mining and other industries have broad application prospects. At present, spraying polyurea elastomer materials are widely used in many fields such as industrial heavy-duty anti-corrosion and wear-resistant,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D7/61B05D7/24B05D7/00B05D5/00
CPCC09D175/02C09D7/61C09D7/70B05D7/24B05D7/58B05D5/00C08K7/08
Inventor 崔桐嘉赵兴顺
Owner LIAOYANG YIBANG NEW BUILDING MATERIALS GRP CO LTD
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