Flame retardant polyurethane composite material and preparation method thereof

Abstract

The invention relates to a flame retardant polyurethane composite material and a preparation method thereof. The traditional flame retardant polyurethane foamed material has a poor use effect. The flame retardant polyurethane composite material provided by the invention is a mixed system comprising 70-99wt% of flame retardant polyurethane and 1-30% of blending type fire retardant, wherein the blending type fire retardant is one or more than one of ammonium polyphosphate, melamine, melamine cyanurate acid, polysiloxane, graphine, a carbon nano tube and kaolin, the fire retardant polyurethane is a random copolymer consisting of a polycarbonate unit, a polyether and an isocyanate unit. The preparation method of the flame retardant polyurethane composite material comprises the following steps of: firstly, preparing fire retardant polyalcohol; then, mixing the fire retardant polyalcohol and the blending type fire retardant into a mixed system; and then adding polyisocyanates into the mixed system and reacting to finally obtain the flame retardant polyurethane composite material. The flame retardant polyurethane composite material prepared by using the preparation method disclosed by the invention has the advantages of excellent fire retardance, low-fogging performance and low-gas-releasing performance.

Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and relates to a polyurethane composite material, in particular to a temperature-resistant, flame-retardant, tough polyurethane composite material and a preparation method thereof. Background technique

[0002] Thermoplastic polyurethane elastomer (TPU) is regarded as an epoch-making new polymer material and one of the most promising synthetic materials at present. TPU has good physical properties, and is now widely used in wire and cable, automobile and other industries. Due to the particularity of the industry, its flame retardant requirements are getting higher and higher.

[0003] The flame retardancy of polyurethane foam materials currently has blending and / or copolymerization methods. The usual blending method is to add melamine, phosphoric acid ester, acrylamide polymer or other halogen-containing flame retardants to the polyol, disperse evenly and react with isocyanate to form ...

Examples

Embodiment 1

[0039] Reactant 7.65Kg chloropropene and 21.2Kg Mix and add to the reaction kettle, then add 40Kg of an aqueous solution with a NaOH content of 10 wt% into the reaction kettle, replace with nitrogen, heat up to 50°C, stir and react at 300KPa for 3 hours, wash the reaction product with water, filter, and dry to obtain a Grade crude product; mix 25Kg of grade 1 crude product and 3.4Kg of hydrogen peroxide into the reactor, replace with nitrogen, stir and react at 0°C and 200KPa for 3 hours, wash the reaction product with water, filter, and dry to obtain grade 2 crude product; Mix 10Kg of secondary crude product and 1g of molecular sieve-loaded Ni-Cu bimetallic catalyst in the autoclave, and then fill the autoclave with CO 2 To 0.1MPa, stirred and reacted at 40°C for 24 hours to obtain a flame-retardant polyol; mix 10Kg of flame-retardant polyol with 50g of ammonium polyphosphate to form a mixed system, and then put 10Kg of lysine diisocyanate into the mixed system, Stir and re...

Embodiment 2

[0041] Reactant 7.65Kg chloropropene and 1.73Kg Mix and add to the reaction kettle, then add 50Kg of an aqueous solution with a NaOH content of 20 wt% into the reaction kettle, replace it with nitrogen, heat up to 55°C, stir and react at 290KPa for 5 hours, wash the reaction product with water, filter, and dry to obtain a first-grade Crude product: 17.4Kg of the primary crude product and 3.4Kg of hydrogen peroxide were mixed into the reactor, replaced with nitrogen, stirred and reacted at 5°C and 195KPa for 5 hours, the reaction product was washed with water, filtered, and dried to obtain the secondary crude product; Mix 5Kg of the secondary crude product, 5Kg of propylene oxide and 50g of silica-loaded Pd-Pt bimetallic catalyst in the autoclave, and then fill the autoclave with CO 2 to 0.2MPa, stirred and reacted at 45°C for 24 hours to obtain a flame-retardant polyol; mix 10Kg of flame-retardant polyol, 2.0Kg of melamine and 0.5Kg of kaolin evenly to form a mixed system, an...

Embodiment 3

[0043] Reactant 7.65Kg chloropropene and 20Kg Mix and add to the reaction kettle, then add 60Kg of an aqueous solution with a NaOH content of 40 wt% into the reaction kettle, replace it with nitrogen, heat up to 60°C, stir and react at 280KPa for 7 hours, wash the reaction product with water, filter, and dry to obtain a first-grade Crude product: 10.9Kg of the primary crude product and 10.2Kg of hydrogen peroxide were mixed into the reactor, replaced with nitrogen, stirred and reacted at 10°C and 190KPa for 4 hours, the reaction product was washed with water, filtered, and dried to obtain the secondary crude product; 5Kg secondary crude product, 1Kg propylene oxide and 30g activated carbon supported CuCl 2 -ZnO bimetallic catalyst is mixed evenly in the autoclave, and the autoclave is vacuumed and filled with CO 2 to 0.3MPa, stirred and reacted at 45°C for 20 hours to obtain a flame-retardant polyol; mix 10Kg of flame-retardant polyol, 1Kg of melamine cyanurate, 0.750 polysi...

technical field

[0001] The invention belongs to the technical field of polymer materials, and relates to a polyurethane composite material, in particular to a temperature-resistant, flame-retardant, tough polyurethane composite material and a preparation method thereof. Background technique

[0002] Thermoplastic polyurethane elastomer (TPU) is regarded as an epoch-making new polymer material and one of the most promising synthetic materials at present. TPU has good physical properties, and is now widely used in wire and cable, automobile and other industries. Due to the particularity of the industry, its flame retardant requirements are getting higher and higher.

[0003] The flame retardancy of polyurethane foam materials currently has blending and / or copolymerization methods. The usual blending method is to add melamine, phosphoric acid ester, acrylamide polymer or other halogen-containing flame retardants to the polyol, disperse evenly and react with isocyanate to form ...

Examples

Embodiment 1

[0039] Reactant 7.65Kg chloropropene and 21.2Kg Mix and add to the reaction kettle, then add 40Kg of an aqueous solution with a NaOH content of 10 wt% into the reaction kettle, replace with nitrogen, heat up to 50°C, stir and react at 300KPa for 3 hours, wash the reaction product with water, filter, and dry to obtain a Grade crude product; mix 25Kg of grade 1 crude product and 3.4Kg of hydrogen peroxide into the reactor, replace with nitrogen, stir and react at 0°C and 200KPa for 3 hours, wash the reaction product with water, filter, and dry to obtain grade 2 crude product; Mix 10Kg of secondary crude product and 1g of molecular sieve-loaded Ni-Cu bimetallic catalyst in the autoclave, and then fill the autoclave with CO 2 To 0.1MPa, stirred and reacted at 40°C for 24 hours to obtain a flame-retardant polyol; mix 10Kg of flame-retardant polyol with 50g of ammonium polyphosphate to form a mixed system, and then put 10Kg of lysine diisocyanate into the mixed system, Stir and re...

Embodiment 2

[0041] Reactant 7.65Kg chloropropene and 1.73Kg Mix and add to the reaction kettle, then add 50Kg of an aqueous solution with a NaOH content of 20 wt% into the reaction kettle, replace it with nitrogen, heat up to 55°C, stir and react at 290KPa for 5 hours, wash the reaction product with water, filter, and dry to obtain a first-grade Crude product: 17.4Kg of the primary crude product and 3.4Kg of hydrogen peroxide were mixed into the reactor, replaced with nitrogen, stirred and reacted at 5°C and 195KPa for 5 hours, the reaction product was washed with water, filtered, and dried to obtain the secondary crude product; Mix 5Kg of the secondary crude product, 5Kg of propylene oxide and 50g of silica-loaded Pd-Pt bimetallic catalyst in the autoclave, and then fill the autoclave with CO 2 to 0.2MPa, stirred and reacted at 45°C for 24 hours to obtain a flame-retardant polyol; mix 10Kg of flame-retardant polyol, 2.0Kg of melamine and 0.5Kg of kaolin evenly to form a mixed system, an...

Embodiment 3

[0043] Reactant 7.65Kg chloropropene and 20Kg Mix and add to the reaction kettle, then add 60Kg of an aqueous solution with a NaOH content of 40 wt% into the reaction kettle, replace it with nitrogen, heat up to 60°C, stir and react at 280KPa for 7 hours, wash the reaction product with water, filter, and dry to obtain a first-grade Crude product: 10.9Kg of the primary crude product and 10.2Kg of hydrogen peroxide were mixed into the reactor, replaced with nitrogen, stirred and reacted at 10°C and 190KPa for 4 hours, the reaction product was washed with water, filtered, and dried to obtain the secondary crude product; 5Kg secondary crude product, 1Kg propylene oxide and 30g activated carbon supported CuCl 2 -ZnO bimetallic catalyst is mixed evenly in the autoclave, and the autoclave is vacuumed and filled with CO 2 to 0.3MPa, stirred and reacted at 45°C for 20 hours to obtain a flame-retardant polyol; mix 10Kg of flame-retardant polyol, 1Kg of melamine cyanurate, 0.750 polysi...