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Preparation method of high-performance solvent-free flame-retardant polyurea coating

A manufacturing method and flame-retardant technology, applied in polyurea/polyurethane coatings, fireproof coatings, coatings, etc., can solve the problems of polyurea resin compositions such as long curing time, large particle size, and formulation differences, and achieve excellent Effects of mechanical properties and operability, excellent mechanical properties, and low production cost

Inactive Publication Date: 2021-10-08
SICHUAN CHUANWEI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] A polyurea resin composition and curing agent are introduced in Chinese Patent No.: 201110403185.7. The composition does not require long-time curing, and is not affected by environmental conditions during curing. Polyurea resin is not exposed to air for a long time. yellowing, however, the curing time of the polyurea resin composition is relatively long
[0018] In Chinese Patent No.: 201210198415.5, a manufacturing process of nano-material modified polyurea resin is introduced. The modified polyurea coating is a polyurea resin synthesized by two components A and B. At the same time, 20-50nm Zinc oxide or titanium dioxide are used as inorganic modified filler materials for polyurea resins, however, in the process of the invention, the particle size of the zinc oxide and titanium dioxide used appears to be larger
[0019] Chinese patent application No.: 201310132859.3 introduces a spray polyurea coating and its preparation method; what is used in this patent is a two-component raw material to prepare polyurea coating, because it needs to be added appropriately in the preparation process of polyurea coating A certain amount of various additives will change the mass ratio of various components in the raw materials of component B after being added, which has obvious formula differences for A and B two-component polyurea coatings

Method used

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  • Preparation method of high-performance solvent-free flame-retardant polyurea coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 1): Add 0.6mol of diethylenetriaminopolyether in the formula of component A into the reactor, and under the condition of passing high-purity dry nitrogen, the temperature of the reactor is raised to 100°C, dehydrated for 4 hours, and the temperature drops to room temperature. Add 0.4mol liquefied MDI to the formula of component A and raise the temperature to 70-110°C, stir and react for 2-5 hours, and cool the obtained mixture to normal temperature under the condition of passing dry nitrogen at normal temperature, and then get the flame-retardant type of component A Polyurea prepolymer;

[0044] 2): Add 0.1mol polyaspartic acid ester and 0.5mol 3,5-dithiotoluenediamine and 3,3'-dichloro4,4'xylylenediamine in the formula of component B; where 3 , the molar ratio of 5-dithiotoluenediamine and 3,3'-dichloro-4,4'-xylenemethanediamine in combination is 1:0.6; and 0.4mol 2,5-dichloro-p-phenylenediamine Put it into a mixing tank, add 0.5wt% polyethylene oxide anti-settling ag...

Embodiment 2

[0048]1): Add 0.4mol of diethylenetriaminopolyether in the formula of component A into the reactor, and under the condition of high-purity dry nitrogen, the temperature of the reactor is raised to 120°C, dehydrated for 2 hours, and the temperature drops to room temperature. Add 0.6mol of trimethyl 1,6-hexamethylene diisocyanate to the formula of component A, raise the temperature to 110°C, stir and react for 2 hours, and cool the obtained mixture to normal temperature under the condition of blowing dry nitrogen at normal temperature, That is, the A-component flame-retardant polyurea prepolymer is obtained;

[0049] 2): Add 0.3mol polyaspartic acid ester and 0.4mol 3,5-diethyltoluenediamine and 3,3'-dichloro4,4'xylylenediamine in the formula of component B; where 3 , the molar ratio of 5-diethyltoluenediamine and 3,3'-dichloro-4,4'-xylenemethanediamine is 1:0.6; and 0.3mol 2,5-dichloro-p-phenylenediamine Put it into the mixing tank, add 2.5wt% polyethylene oxide anti-settling ...

Embodiment 3

[0053] 1): Add 0.5mol xylitol polyether in the formula of component A into the reactor, and under the condition of passing high-purity dry nitrogen, the temperature of the reactor rises to 105°C, dehydrates for 3.5 hours, and the temperature drops to room temperature, then add A 0.5mol trimethyl 1,6-hexamethylene diisocyanate in the component formula, the temperature is raised to 85°C, stirred and reacted for 3.5h, and the obtained mixture is cooled to normal temperature under the condition of blowing dry nitrogen at normal temperature, that is Obtain A-component flame-retardant polyurea prepolymer;

[0054] 2): Add 0.2mol polyaspartic acid ester and 0.45mol 3,3'-dichloro-4,4'-xylylenediamine; and 0.35mol 2,5-dichloro-p-phenylenediamine in the formula of component B Add 1.3wt% carbo resin anti-settling agent to the mixing tank, stir for 11 min at a stirring speed of 1250 rpm, and then add the remaining components in the C component formula. First add 13wt% nano-scale barium s...

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Abstract

The invention discloses a preparation method of a high-performance solvent-free flame-retardant polyurea coating. The preparation method is characterized in that the coating is composed of a component A, a component B and a component C and the preparation method comprises the following steps: firstly, dehydrating and prepolymerizing raw materials of the component A to form a prepolymer; secondly, uniformly mixing raw materials in a component B, namely a liquid amine chain extender, polyaspartic acid ester and 2,5-dichloro-p-phenylenediamine, with an anti-settling agent in the component C in a mixing kettle to form a uniform solution, and then adding a pigment, a flame-retardant filler and an auxiliary agent in the component C; under the condition of a certain stirring speed, conducting mixing to form a component-D mixture; and mixing the component-A prepolymer and the component-D mixture according to a main component ratio of 1: 1 mol / mol to obtain the polyurea coating, thereby completing the preparation of the flame-retardant polyurea coating. The coating has excellent mechanical property and performance, and is a novel solventless coating which is simple to operate and wide in application range; and the coating is applicable to flame-retardant protection of interior decoration of house interior walls, traffic vehicles, airplanes and ships, and is suitable for manual construction or / and spraying.

Description

Technical field: [0001] The invention relates to a method for manufacturing a high-performance solvent-free flame-retardant polyurea coating, which belongs to the application field of high-performance coatings. Background technique: [0002] Spray polyurea elastomer technology has gone through three development stages of polyurethane, polyurethane urea and polyurea. In the three systems, component A is basically the same, all of which are aromatic or aliphatic prepolymers and semi-prepolymers, and the difference lies in component B. Component B of spray polyurethane is composed of hydroxyl-terminated resin and hydroxyl-terminated chain extender, and contains a catalyst for improving reactivity. [0003] Component B of spray polyurethane / urea can be composed of hydroxyl-terminated resin, amine-terminated resin and amine chain extender, and generally contains a catalyst for improving the reaction activity. The B component of spray polyurea must be composed of amino-terminate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/18C09D7/47C09D7/61C09D7/80C09D7/40
CPCC09D175/02C09D5/18C09D7/47C09D7/61C09D7/80C09D7/40C08L2201/02C08K3/34
Inventor 宋大余文洁王琳刘文良
Owner SICHUAN CHUANWEI ELECTRONICS
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