A kind of preparation method of flame-retardant polyurea elastomer coating

Abstract

The invention relates to the technical field of paint, in particular to a preparation method of flame-retardant polyurea elastomer paint. The polyurea elastomer paint is prepared from a component A and a component B. The preparation method comprises the following steps: (1) dehydrated siloxane polyether glycol, diisocyanate and a diluent are mixed uniformly in a reaction kettle, and then subjectedto a reaction for 2-4 hours at 80-95 DEG C, and the component A is obtained; (2) dehydrated amino-terminated polyether and a dehydrated amine chain extender are uniformly mixed with organic aluminumhypophosphite, polytetrafluoroethylene, ammonium polyphosphate, dipentaerythritol and additives in a reaction kettle, stirring is performed at 60-120 DEG C for 1-2 h, and the component B is obtained.The polyurea elastic resin prepared from a flame retardant and polyurea resin by compounding has excellent flame retardancy and thermal stability.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method of a flame-retardant polyurea elastomer coating. Background technique [0002] Spray polyurea elastomer coating is an emerging material that does not contain any volatile organic compounds (VOC) and is environmentally friendly and has high protective performance. [0003] In the prior art, flame-retardant polyurea elastomer coatings are mostly based on halogen-containing flame-retardant systems and water-based systems. With the enhancement of people's awareness of safety and environmental protection, many fields, such as construction, transportation, ships, etc., have put forward higher requirements for fire performance. Halogen-free flame retardants have received extensive attention due to their low toxicity and environmental protection characteristics, and halogen-free flame retardants are the future development trend of flame retardants. Chinese patent ...

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Problems solved by technology

Chinese patent CN201010606500.1 discloses a polyurea intumescent fireproof coating, component A includes: isocyanate prepolymer, component B includes: amino-terminated polyether, polyamine chain extender, diluent, carbon forming catalyst, forming Charcoal agent, foaming agent, flame retardant, smoke suppressant, pigment and filler, additive, mixed solvent, the weight ratio of A and B components is 1:5-1:7, the paint should be burnt into charcoal by paint film, Forming a carbonized layer, hindering the mechanism of combustion and flame retardant, but due to the addition of more carbon-forming substances and fillers, the viscosity of component B is not easy to control, and it is more difficult to use spraying

Chinese patent CN201310709700.3 discloses a spray-on flame-retardant and antistatic polyurethane elastomer. Component A is composed of 40-60 parts of isocyanate and 40-60 parts of phosphorus-containing flame-retardant polyol, and component B is composed of 0-30 parts of expanded polyol. Chain agent, 0-30 parts of polyether polyol, 10-75 parts of amino-terminated polyether, 0-30 parts of carbon nanotube slurry, 0-3 parts of pigment, 0-3 parts of additives, because polyurea contains A large amount of phosphorus-containing flame-retardant polyols improves the flame-retardant properties of polyurea, but causes the viscosity of the resin to increase, and the mechanical properties of the curing are reduced

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