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A kind of halogen-free flame retardant and flame-retardant polyurea elastomer coating

A technology of polyurea elastomer and flame retardant, applied in the field of coatings, can solve the problems of difficult control of component B viscosity, increased resin viscosity, and reduced mechanical properties, so as to improve mechanical properties and heat resistance, and prevent melting Effect of dripping and improving flame retardancy

Active Publication Date: 2020-07-14
长沙盾甲新材料科技有限公司
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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 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 leads to an increase in the viscosity of the resin and a decrease in mechanical properties after curing

Method used

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  • A kind of halogen-free flame retardant and flame-retardant polyurea elastomer coating
  • A kind of halogen-free flame retardant and flame-retardant polyurea elastomer coating
  • A kind of halogen-free flame retardant and flame-retardant polyurea elastomer coating

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preparation example Construction

[0035] The present invention also provides a preparation method of polyurea elastomer coating, including the following steps:

[0036] (1) Mix the dehydrated siloxane polyether diol, diisocyanate, and diluent uniformly in a reactor, and then react at 80-95°C for 2 to 4 hours to obtain component A;

[0037] (2) Mix the dehydrated amino-terminated polyether, dehydrated amine chain extender, organic aluminum hypophosphite, polytetrafluoroethylene, ammonium polyphosphate, dipentaerythritol, and additives in the reaction kettle evenly, at 60~ Stir at 120°C for 1 to 2 hours to obtain component B.

[0038] According to the present invention, in order to optimize the reaction efficiency, before the reaction, the present invention also performs reduced pressure dehydration on the raw materials. Under preferred conditions, the dehydration process of the siloxane polyether glycol is: the temperature is 100-120°C, The pressure is 0.02~0.1MPa, and the time is 1~3h.

[0039] According to the prese...

Embodiment 1

[0044] The content of each raw material in component A and component B in this example is shown in Table 1.

[0045] (1) Dehydrate 40 parts by weight of siloxane polyether diol at a temperature of 110° C. and a pressure of 0.05 MPa for 2 hours, and then combine the dehydrated siloxane polyether diol with 55 parts by weight of 4, 4'-MDI and 5 parts by weight of DOP are mixed uniformly in the reactor, and then reacted at 90°C for 3 hours to obtain component A;

[0046] (2) 50 parts by weight of D-2000 and 30 parts by weight of Ethacure300 were dehydrated for 1.5h at a temperature of 110°C and a pressure of 0.05MPa respectively, and then the dehydrated D-2000, dehydrated Ethacure300 and 8 parts by weight Organic aluminum hypophosphite, 1 part by weight of polytetrafluoroethylene, 8 parts by weight of ammonium polyphosphate, and 3 parts by weight of dipentaerythritol are mixed uniformly in the reactor, and stirred at 90° C. for 1.5 hours to obtain component B.

[0047] Table 1: The cont...

Embodiment 2

[0050] The content of each raw material in component A and component B in this example is shown in Table 2.

[0051] (1) Dehydrate 50 parts by weight of siloxane polyether diol at a temperature of 110° C. and a pressure of 0.02 MPa for 2 hours, and then combine the dehydrated siloxane polyether diol with 45 parts by weight of 4, 4'-MDI and 5 parts by weight of DBP are uniformly mixed in the reactor, and then reacted at 85°C for 3 hours to obtain component A;

[0052] (2) 50 parts by weight of D-2000 and 30 parts by weight of Unilink 4200 were dehydrated for 2 hours at a temperature of 110°C and a pressure of 0.05 MPa, and then dehydrated D-2000, dehydrated Unilink 4200 and 6 parts by weight of organic Aluminum hypophosphite, 1 part by weight of polytetrafluoroethylene, 12 parts by weight of ammonium polyphosphate, and 1 part by weight of dipentaerythritol are uniformly mixed in the reactor, and stirred at 100° C. for 1 hour to obtain component B.

[0053] Table 2: The content of eac...

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Abstract

The invention relates to the technical field of coatings, in particular to a halogen-free flame retardant and a flame-retardant polyurea elastomer coating. The halogen-free flame retardant comprises organic aluminium hypophosphite, polytetrafluoroethylene, ammonium polyphosphate and dipentaerythritol. The halogen-free flame retardant is compounded by organic aluminium hypophosphite, polytetrafluoroethylene powder, ammonium polyphosphate and dipentaerythritol. After the halogen-free flame retardant is combusted, a large amount of carbide is generated, and a carbonization layer is formed to prevent a matrix from continuing to be combusted; the halogen-free flame retardant can also prevent melting and dripping, and further has the advantages of being good in thermal stability and low in smokegeneration amount.

Description

Technical field [0001] The invention relates to the technical field of coatings, in particular to a halogen-free flame retardant and flame-retardant polyurea elastomer coating. Background technique [0002] Spray polyurea elastomer coating is a new material with high protection performance that does not contain any volatile organic compounds (VOC) and is environmentally friendly. It has the advantages of waterproof, anti-corrosion, aging resistance and abrasion resistance through mixed spray construction. [0003] In the prior art, flame-retardant polyurea elastomer coatings are mostly 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 protection performance. Halogen-free flame retardants have received widespread attention due to their low toxicity and environmental protecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/02C09D5/18C08G18/50
CPCC08G18/482C08G18/5021C08G18/5096C08K2003/323C08L2201/02C08L2201/08C08L2201/22C09D5/18C09D175/02C08L27/18C08K13/02C08K3/32C08K5/06C08K5/5313
Inventor 罗世彬裘航盛
Owner 长沙盾甲新材料科技有限公司
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