A kind of intumescent flame retardant and its preparation method and application

A technology of intumescent flame retardant and silane coupling agent, used in coatings, polyester coatings, fire retardant coatings, etc. Obtain and other problems, to achieve the effect of easy coating and bright appearance, excellent flame retardant effect

Active Publication Date: 2020-04-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are also bottlenecks associated with applying flame retardant coatings to engineering plastic surfaces
There are mainly the following two reasons. One is that the surface polarity of engineering plastics is low, which leads to a decrease in the bonding force between the coating and the substrate and insufficient adhesion.
Second, the flexibility of the coating is difficult to obtain, and it is necessary to add a variety of components to maintain good flexibility of the coating
The composition is complex, the solvents used are not environmentally friendly solvents, and the flame retardant rating of the coating only reaches the V1 level, and there is no mention of how to treat the plastic surface so that the coating adheres to it
Chinese patent CN106189566A discloses "an intumescent flame retardant coating for the surface of engineering plastics and its preparation method", which uses a wetting agent to treat the surface of engineering plastics. This method is not suitable for continuous and rapid processing of a large number of samples. surface treatment
Chinese patent CN101597307 discloses "A UV-curable phosphorus-nitrogen-containing halogen-free flame retardant and its preparation method". In the resin, the flexibility is insufficient, and the application to plastics will be limited

Method used

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  • A kind of intumescent flame retardant and its preparation method and application
  • A kind of intumescent flame retardant and its preparation method and application
  • A kind of intumescent flame retardant and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049]First, at a temperature of 80° C., 40 parts of ammonium polyphosphate were ultrasonically dispersed in 150 parts of absolute ethanol, and then poured into a single-necked flask for magnetic stirring. Then add 1 part of silane coupling agent dropwise to 10 parts of absolute ethanol, then add 4 parts of glacial acetic acid dropwise to adjust the pH to 3.5, and then dropwise dropwise into the above-mentioned one-necked flask containing ammonium polyphosphate. At a temperature of 75° C., after fully stirring at a speed of 300 r / min for 2 h, the crude product of ammonium polyphosphate modified by a silane coupling agent was obtained. Then the above-mentioned crude product was suction-filtered, washed several times with absolute ethanol, and dried overnight at 80° C. to obtain a pure product. Dissolve 15 parts of hyperbranched polyester (char-forming agent) in the solvent, add 1 part of catalyst, pour it into a three-necked flask, react at room temperature for half an hour, ta...

Embodiment 2

[0055] The modified ammonium polyphosphate prepared in Example 1 was used.

[0056] First, add 50 parts of ethanol to the beaker, add 2.5 parts of hyperbranched polyester (char-forming agent, film-forming agent) under the condition of magnetic stirring and heating until it is completely dissolved, then slowly add polyvinyl formaldehyde in small amounts After adding 1 part of aldehyde, keep stirring at high speed for 10 minutes until the solution is transparent. Under the situation that temperature is 130 ℃, add 3.75 parts of modified ammonium polyphosphates successively again. And fully stirred at the speed of 500-600r / min for 5 minutes to obtain a uniformly dispersed emulsion. At this speed and temperature of 130°C, stop heating and stirring until the solution reaches a viscous state. Then take the polypropylene sample strip and place it in the magnetron sputtering equipment. According to 0.5h. Finally, this viscous coating was applied to the magnetron sputtered polypropy...

Embodiment 3

[0058] The modified ammonium polyphosphate prepared in Example 1 was used.

[0059] First, add 50 parts of ethanol to the beaker, add 3 parts of hyperbranched polyester (char-forming agent, film-forming agent) under the condition of magnetic stirring and heating until it is completely dissolved, then slowly add polyvinyl formal After adding 1 part of aldehyde, keep stirring at high speed for 10 minutes until the solution is transparent. When the temperature is 130°C, add 3 parts of modified ammonium polyphosphate successively. And fully stirred at the speed of 500-600r / min for 5 minutes to obtain a uniformly dispersed emulsion. At this speed and temperature of 130°C, stop heating and stirring until the solution reaches a viscous state. Then take the polypropylene sample strip and place it in the magnetron sputtering equipment. According to 0.5h. Finally, this viscous coating was applied to the magnetron sputtered polypropylene strip. This example is referred to as sample ...

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Abstract

The invention discloses an intumescent flame retardant and a preparation method and application thereof. The intumescent flame retardant is prepared from the following raw materials in parts by weight: 4-6 parts of modified ammonium polyphosphate, 3-4 parts of hyperbranched polyester, 0-1 part of polyvinyl alcohol and 45-50 parts of absolute ethanol. The hyperbranched polyester in the intumescentflame retardant serves as a char forming agent and also a film forming agent. The invention provides the application of the intumescent flame retardant in engineering plastics, and during application,the surface of the engineering plastics is treated by magnetron sputtering, surface energy can be improved without the need of complicated surface wetting agents or chemical deposition treatment, theintumescent flame retardant is easy to coat and the adhesive force reaches grade 5B. The hyperbranched polyester in the fire retardant has excellent char forming property, improves the adhesion firmness of the coating and also achieves excellent flame retardant effects; and the limit oxygen index LOI on polypropylene reaches 32% and reaches grade V0 in a UL-94 test, and the coating has excellentflexibility, can adapt to deformation of a matrix without falling and has wide applicable environments.

Description

technical field [0001] The invention discloses an intumescent flame retardant, a preparation method and application thereof, and belongs to the technical field of flame retardant coatings. Background technique [0002] With the development of society, the consumption of various engineering plastic products is increasing rapidly, and polymer materials can be seen everywhere in our lives. Among them, engineering plastics are extremely flammable, which can easily cause fire and cause loss of life and property. Therefore, it is of great significance to carry out flame-retardant treatment on engineering plastics to delay the spread of fire and reduce the loss of life and property. However, in the way of flame retardant engineering plastics, the traditional method is to add flame retardants to the matrix material by blending. If you want to achieve the ideal flame retardant performance, you need a large amount of addition, which is bound to The mechanical properties of engineeri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/00C09D129/14C09D5/18C09D7/20C08J7/05C08J7/043C08L23/12C08L25/06
CPCC08J7/0427C08J2323/12C08J2325/06C08J2429/14C08J2467/00C08K2003/323C08L2201/02C09D5/18C09D7/20C09D167/00C08L29/14C08K9/06C08K9/08C08K3/32
Inventor 张猛李飞张乃恩晏泓李香平刘春莲王晧郭晓荣
Owner TAIYUAN UNIV OF TECH
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