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Melamine grafting modified polyurethane plastic and preparation method thereof

A technology of melamine and graft modification, applied in the field of plastics, can solve the problems of insignificant flame retardant effect of flame retardants, decline in physical and mechanical properties, loss of polyurethane performance advantages, etc., achieve excellent anti-light aging performance, and obvious flame retardant effect , good elasticity

Active Publication Date: 2018-01-05
海泉风雷新能源发电股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the flame retardant modification of polyurethane generally adopts the method of adding flame retardants, but the addition of flame retardants often causes the physical and mechanical properties of foam collapse, cracking, pulverization, or rebound to be greatly reduced, and the polyurethane itself is lost. The performance advantages of these flame retardants, and the flame retardant effect is not significant when these flame retardants are added alone

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The melamine graft modified polyurethane plastic of the present embodiment is prepared by the following steps:

[0020] (1) Use sodium hydroxide solution to adjust the pH value of formaldehyde to 8-9, transfer it to the reaction kettle, start stirring, add melamine and urea, blow nitrogen, slowly raise the temperature to 85°C, stir and react at constant temperature for 4 hours, and then add polyether polyol , raise the temperature to 98°C, continue to stir the reaction at constant temperature for 6 hours, raise the temperature to 120°C to remove unreacted monomers and moisture in a vacuum, and cool down to obtain polyol compounds; among them, formaldehyde, melamine, urea and polyether polyols The mass ratio is 1:0.4:0.2:8;

[0021] (2) Mix silicone-modified anti-ultraviolet particles with toluene diisocyanate evenly, add the catalyst dibutyltin dilaurate, oscillate ultrasonically at 70°C for 2h, add polyol compound, raise the temperature to 85°C and stir with constant t...

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Abstract

Melamine grafting modified polyurethane plastic is characterized by being prepared from the following steps: firstly grafting melamine with polyether polyol to obtain a polyol compound; prepolymerizing the synthesized polyol compound and toluene diisocynate and filling organosilicone modified uvioresistant particles to obtain a prepolymer; adding a curing agent into the prepolymer, pouring, defoaming, and curing to obtain the melamine grafting modified polyurethane plastic. The polyurethane plastic has good elasticity, excellent wear resistance and illumination aging resistance and good flame-retarding effect.

Description

technical field [0001] The invention belongs to the field of plastics, and in particular relates to a melamine graft-modified polyurethane plastic and a preparation method thereof. Background technique [0002] Polyurethane materials have developed rapidly in my country because of their many excellent properties. Among them, flexible foam plastics, which account for a large part of polyurethane production, have light weight, softness, insulation, breathability, good resilience, small compression deformation, and excellent moisture aging resistance. , and oil resistance, organic solvent resistance, sound insulation, heat preservation and other excellent properties, it has a wide range of uses and has been widely used in various fields. But at the same time, due to the low density and large specific surface area, flexible foams are easily ignited and burned, and the burning problem is prominent. Therefore, replacing non-flame-retardant polyurethane foams with flame-retardant po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/64C08G18/10C08G18/32C08G81/00C08G12/38C08K9/06C08K9/10C08K3/22
Inventor 李振华李岩李菲菲李静高为国刘德生黄波
Owner 海泉风雷新能源发电股份有限公司
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