Enhanced explosion-proof coating and preparation method and application thereof

An enhanced coating technology, applied in coatings, fireproof coatings, polyurea/polyurethane coatings, etc., can solve the problems of poor tear strength of polyurea coatings, difficulty in meeting explosion-proof requirements, poor hydrolysis resistance, etc., to achieve Good adhesion, improved tear resistance, good flame retardant performance

Pending Publication Date: 2021-11-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyester synthetic prepolymer components are used, which have poor hydrolysis resistance and low temperature flexibility. Polyester polyols have large cohesive energy and are mostly waxy solids at room temperature. The viscosity after heating and melting is relatively high. The miscibility of polyol is far less good than that of polyether polyol, which affects its mechanical properties
In summary, the polyurea coatings in the prior art have poor tear strength and are difficult to meet explosion-proof requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0072] According to a preferred embodiment of the present invention, the method includes:

[0073] Preparation of component A: Add polyol into the reaction kettle, heat and stir under vacuum condition, vacuum -0.09~-0.1MPa, stirring speed 600~1000 rpm, heat to 95℃~115℃ for dehydration; then remove the vacuum, And fill with nitrogen protection, add isocyanate and flame retardant after cooling down, stir evenly, and react at 80°C-90°C for 2-3 hours; after the reaction is complete, cool down, add diluent and stir evenly, cool and discharge to obtain component A ;

[0074] Preparation of component B: Add the amino-terminated polyether into the reaction kettle, stir evenly, add the chain extender, pass nitrogen protection while stirring, control the temperature in the kettle to less than 40°C, and then reduce the stirring speed to 200 rpm; Afterwards, grind the flame retardant and additives evenly on the three-roller grinder to a fineness of ≤50 μm, mix them evenly, add them into ...

Embodiment 1

[0095] The preparation method of component A: Add 46 parts of polytetrahydrofuran ether diol and 14 parts of 1,4-butanediol into a reaction kettle protected by nitrogen, and stir under the condition of vacuum degree -0.095MPa, and the stirring speed is 600 rpm / minute. Heat at 100°C for dehydration, then remove the vacuum, fill with nitrogen for protection, add 24 parts of hexamethylene diisocyanate after cooling down, heat to 80°C for 3 hours after stirring evenly, and add 8 parts of 2-chloroethyl after the reaction is complete base ester, after stirring evenly, add 3 parts of dimethyl methyl phosphate, and then discharge after stirring evenly.

[0096] The preparation method of component B: add 15 parts of amino-terminated polyether T5000, 35 parts of amino-terminated polyether D2000, and 10 parts of amino-terminated polyether D230 into the reactor in sequence, stir well and then add 28 parts of diethyltoluenediamine, Nitrogen protection was introduced while stirring, and a...

Embodiment 2

[0100] The preparation method of component A: Add 22 parts of polytetrahydrofuran ether diol and 18 parts of polybutadiene polyol into a reaction kettle protected by nitrogen, and stir at a vacuum degree of -0.095MPa at a stirring speed of 800 rpm minute. Heat at 115°C for dehydration, then remove the vacuum, fill with nitrogen for protection, add 16 parts of polymethylene phenyl polyisocyanate after cooling down, heat to 90°C to react for 2 hours after the reaction is complete, add 8 parts of toluene phosphate after cooling down - Diphenyl ester, after stirring evenly, add 2 parts of acetone, stir evenly, then discharge.

[0101] The preparation method of component B: Add 10 parts of amino-terminated polyether T5000, 25 parts of amino-terminated polyether D2000, and 25 parts of amino-terminated polyether D400 into the reactor in sequence, stir well and then add 20 parts of diethyltoluenediamine, Nitrogen protection was introduced while stirring, and after the temperature in ...

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Abstract

The invention provides an enhanced explosion-proof coating and a preparation method and application thereof. The coating is formed by spraying a material containing a polyurea material and a fiber material, the polyurea material comprises a component A and a component B. The component A is a prepolymer obtained by prepolymerizing raw materials containing isocyanate, polyol, a flame retardant and an optional diluent, and the component B contains amine-terminated polyether, a chain extender, a flame retardant and optional other auxiliaries. Compared with other anti-explosion coatings, the explosion-proof coating has the advantages that the tearing strength is greatly improved; the coating has good adhesive force with substrates such as concrete and steel, and is not layered; the coating can adapt to the low-temperature environment of -36 DEG C, and the service life exceeds 20 years.

Description

technical field [0001] The invention belongs to the field of combined coatings, and in particular relates to an enhanced anti-explosion coating and its preparation method and application. Background technique [0002] The cabinet room, control room, monitoring room and other buildings in the area adjacent to the production equipment in petrochemical and refining production enterprises are facing explosion hazards (60-150kpa anti-explosion impact load). To cause personal injury, it is necessary to conduct a safety assessment of the above-mentioned buildings, then strengthen the frame of the building, and spray anti-blast coating on the wall of the building to prevent damage from explosion hazards and protect personnel safety. As the main component of explosion-proof coatings, polyurea has excellent tear resistance and impact resistance. The tear strength of existing explosion-proof coatings is generally 105N / mm-120N / mm, but after adding chopped carbon fiber to the coating, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D175/14C09D7/61C09D7/63C09D7/65C09D5/18C08G18/66C08G18/69C08G18/50C08G18/48C08G18/42C08G18/32B05D7/24
CPCC09D175/02C09D175/14C09D5/18C09D7/61C09D7/63C09D7/65C09D7/70C08G18/6674C08G18/6685C08G18/5024C08G18/4854C08G18/482C08G18/3206C08G18/324C08G18/69C08G18/4277C08G18/3808C08G18/6651C08G18/3882C08G18/4825C08G18/3228B05D7/24C08K2003/2241C08L33/04C08K13/04C08K7/06C08K5/521C08K3/22C08K5/1345C08L29/14C08K5/523C08K5/132C08K3/04
Inventor 卢卫王全国白永忠党文义辛保泉
Owner CHINA PETROLEUM & CHEM CORP
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