Modified graphite flame retardant, all-water-blown polyurethane foam prepared from modified graphite flame retardant, and preparation method of all-water-blown polyurethane foam

A technology of polyurethane foam and full water foaming, which is applied in the field of polyurethane foam to achieve the effect of increased oxygen index, less additive amount and good flame retardant performance

Inactive Publication Date: 2019-12-31
WEIHAI YUNSHAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the modification of expandable graphite is mainly through the surface modification of organic silicon, and the chemical grafting modification of the functional groups of expandable graphite itself has not been involved.

Method used

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  • Modified graphite flame retardant, all-water-blown polyurethane foam prepared from modified graphite flame retardant, and preparation method of all-water-blown polyurethane foam
  • Modified graphite flame retardant, all-water-blown polyurethane foam prepared from modified graphite flame retardant, and preparation method of all-water-blown polyurethane foam
  • Modified graphite flame retardant, all-water-blown polyurethane foam prepared from modified graphite flame retardant, and preparation method of all-water-blown polyurethane foam

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Experimental program
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Effect test

preparation example Construction

[0025] A kind of all-water foaming polyurethane foam containing modified graphite flame retardant, it is characterized in that described this all-water foaming polyurethane foam is made of polyether polyol, polyester polyol, catalyst, silicone oil, modified graphite flame-retardant agent, synergistic flame retardant, foaming agent, stabilizer, and polymerized isocyanate, the mass parts of the above components are: 20-40 parts of polyether polyol, 15-45 parts of polyester polyol, 2-6 parts of catalyst 1.5-2.5 parts of silicone oil, 20-40 parts of modified graphite flame retardant, 6-20 parts of synergistic flame retardant, 3-7 parts of foaming agent, 5-8 parts of stabilizer, 0.8-1.5 parts of polymerized isocyanate , the polyether polyol refers to a polyether polyol with an average hydroxyl functionality of 2-8 and a hydroxyl value of 200-800 mgKOH / g; the polyester polyol refers to an average hydroxyl functionality of 2-5, A polyester polyol with a hydroxyl value of 150-400 mgKO...

Embodiment 1

[0033] (1) Preparation of modified expandable graphite: a. Shaping process: put the expandable graphite into a mechanical impact mill for shaping, then classify with a vibrating screen, return to re-production if it is less than 80 mesh, and only enter 80-150 mesh In the next modification section, more than 150 mesh will be processed separately; b. Modification process: put the 80-150 mesh expandable graphite obtained in step a into the mixer, and perform low-speed stirring at a speed of 50-85r / min. Molecular surface modifier, after stirring for 10-15 minutes, increase the speed to 150-200r / min, stir for 20-30 minutes, and then sieve through 80 meshes to obtain modified expandable graphite. The polymer surface modification Polyvinylpyrrolidone is used as an agent;

[0034] (2) Preparation of expandable graphite flame retardant: add the modified expandable graphite in step (1) to a dispersing suspending agent, and mix evenly in a stainless steel stirrer at a low speed below 500...

Embodiment 2

[0042] (1) Preparation of modified expandable graphite: a. Shaping process: put the expandable graphite into a mechanical impact mill for shaping, then classify with a vibrating screen, return to re-production if it is less than 80 mesh, and only enter 80-150 mesh In the next modification section, more than 150 mesh will be processed separately; b. Modification process: put the 80-150 mesh expandable graphite obtained in step a into the mixer, and perform low-speed stirring at a speed of 50-85r / min. Molecular surface modifier, after stirring for 10-15 minutes, increase the speed to 150-200r / min, stir for 20-30 minutes, and then sieve through 80 meshes to obtain modified expandable graphite. The polymer surface modification Polyethylene glycol for agent;

[0043] (2) Preparation of expandable graphite flame retardant: add the modified expandable graphite in step (1) to a dispersing suspending agent, and mix evenly in a stainless steel stirrer at a low speed below 500r / min to ob...

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Abstract

The invention relates to the technical field of polyurethane foam, and more specifially relates to a modified graphite flame retardant, all-water-blown polyurethane foam prepared from the modified graphite flame retardant, and a preparation method of the all-water-blown polyurethane foam. The modified graphite flame retardant is characterized by consisting of modified expandable graphite and a dispersion suspending agent, wherein the modified expandable graphite is formed by adsorbing one or more layers of a high molecular surface modifier with special functional groups on the surface of expandable graphite; the all-water-blown polyurethane foam is composed of a polyether polyol, a polyester polyol, a catalyst, silicone oil, the modified graphite flame retardant, a synergistic flame retardant, a foaming agent, a stabilizer and a polyisocyanate. The all-water-blown polyurethane foam is prepared by the following steps: (1) preparing modified expandable graphite; (2) preparing the expandable graphite flame retardant; and (3) preparing the all-water-blown polyurethane foam. The obtained all-water-blown polyurethane foam has the advantages of favorable flame retardancy, long-lasting flame-retardant effect, low addition amount, greatly increased oxygen index, greatly reduced heat release rate peak value and the like.

Description

technical field [0001] The invention relates to the technical field of polyurethane foam, in particular to a modified graphite flame retardant with reasonable formula, good flame retardant performance, long-lasting flame retardant effect, less addition, greatly increased oxygen index, and greatly reduced peak heat release rate And use the flame retardant to prepare full water foaming polyurethane foam and its preparation method. Background technique [0002] As we all know, polyurethane foam has outstanding characteristics such as low density, good insulation, high compressive strength, excellent mechanical properties and simple molding process, and is widely used in various fields. The traditional blowing agents for preparing polyurethane foam include hydrochlorofluorocarbon blowing agents, hydrocarbon blowing agents represented by cyclopentane, water and hydrofluorocarbons. Hydrocarbon blowing agent itself is flammable and explosive, so it is not suitable for on-site cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/12C08K7/24C08G18/48C08G18/42C08J9/12C08G101/00C08L75/06C08L75/08
CPCC08G18/4018C08G18/42C08G18/4825C08J9/125C08J2203/10C08J2375/06C08J2375/08C08K7/24C08K9/12C08G2110/0083
Inventor 程瑾宁韩啸龙燕包彦彦
Owner WEIHAI YUNSHAN TECH
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