Polyurethane flame-retardant material and preparation method thereof

Abstract

The invention discloses a polyurethane flame-retardant material and a preparation method. The polyurethane flame-retardant material is prepared by virtue of the following steps: in the presence of nitrogen, fetching 10-30ml of isophorone diisocyanate and 10-30ml of dehydrated polyether diol to react for 2 hours at 90 DEG C; cooling to 60 DEG C; adding 3-5ml of dimethylolpropionic acid, 3-5ml of 1,4-butanediol, 3-5ml of trimethylolpropane and 3-5ml of 15% boron phenolic acetone liquid, and sequentially adding 1ml of stannous octoate and dibutyltin dilaurate, and reacting for 4 hours; adding 3ml of acetone to adjust the viscosity; continuously reacting until isocyanate does not change; cooling to below 30 DEG C, and adjusting the viscosity with 1ml of acetone; adding 3ml of triethylamine for neutralization for 5 minutes; adding water and emulsifying and dispersing for 3 minutes; performing reduced-pressure distillation to remove acetone to obtain the polyurethane flame-retardant material. The material prepared by the method is smoke-less in the burning process, and the flame-retardant level of the sample can reach the level UL-94V-1 which is a relatively high flame-retardant level.

Description

technical field [0001] The invention relates to a polyurethane flame retardant material and a preparation method thereof. Background technique [0002] Polyurethane (PU) is a synthetic material composed of hard segments of urethane and soft segments of polyether chains or polyester ether chains. It is a kind of material with relatively comprehensive properties, with good physical properties and excellent weather resistance. , elasticity, and soft and hard segments do not change much with temperature, and can be made into a series of products such as pagomi plastics, rubber, coatings, adhesives, fibers, and synthetic leather waterproof materials. It is a relatively popular building material and industrial product packaging. materials, furniture cushion materials and refrigeration equipment materials. [0003] However, the disadvantage of polyurethane is that it is easy to burn. When the temperature is higher than 60 degrees, it is easy to soften. When the temperature is high...

AI Technical Summary

Problems solved by technology

[0005] In view of the main problems existing in the combination of polyurethane rigid foam insulation systems at home and abroad, combined with the current research progress of polyurethane rigid foam fire and flame retardant technology, polyurethane insulation materials have reached the national standard B1 or higher fire protection level, and the single addition of flame retardant technology The problem cannot be solved, and there is a problem that the fire-proof and flame-retardant performance of the polyurethane rigid foam insulation material is contradictory to the mechanical performance. At the same time, a systematic solution is proposed in combination with the addition of flame retardants and flame retardant curing agents