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A kind of thermosetting polyester polymer flame retardant containing phosphorus and nitrogen elements and its preparation method and application

A polymer flame retardant, thermosetting technology, applied in the field of polymer flame retardants, can solve the problems of low thermal decomposition temperature, decline in material mechanical properties, moisture absorption of flame retardant components, etc., to achieve high decomposition temperature and flame retardant performance Excellent, low water solubility effect

Active Publication Date: 2020-03-31
JIANGSU LISIDE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water solubility will make the flame retardant component absorb moisture and reduce the insulation of the material, which will limit the application in the electrical and electronic fields; since most polymer matrix materials are non-polar materials, the water solubility of the flame retardant component will make the flame retardant Component migration and precipitation to the surface, on the one hand, affects the appearance, on the other hand, it leads to uneven distribution of flame retardant components in the material, which gradually reduces the flame retardant effect and affects the long-lasting flame retardant performance of the material; some polymers that can be used as charring agents Compounds, such as thermoplastic polyester compounds, due to compatibility problems with the matrix material, the mechanical properties of the material are greatly reduced and the application value is lost; polyols or low molecular weight polyols also have low thermal decomposition temperatures , so it is not suitable for application in substrates with high processing temperature, such as nylon, polyester, etc.

Method used

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  • A kind of thermosetting polyester polymer flame retardant containing phosphorus and nitrogen elements and its preparation method and application
  • A kind of thermosetting polyester polymer flame retardant containing phosphorus and nitrogen elements and its preparation method and application
  • A kind of thermosetting polyester polymer flame retardant containing phosphorus and nitrogen elements and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In a 1L flask, add 522 grams (2 moles) of trihydroxyethyl isocyanurate, protect it with nitrogen, heat to 150°C to melt trihydroxyethyl isocyanurate, and then add 3.0 grams of tetrabutyl Ammonium bromide and 642g (3 moles) CEPPA, stir the mixture vigorously, heat it from 150°C to 220°C within 6 hours, discharge the water in the reaction process, and condense and measure it, keep it at 220°C for 1 hour, then cool down to 150°C , the melt is discharged to a metal tray, and the melt is cooled to obtain a light yellow brittle solid with a melting point ranging from 100 to 120°C and a residual acid value of 5 mg KOH / g.

[0036] Put the prepolymer together with the tray in a vacuum oven, pump a vacuum, keep the vacuum at 40KPa, heat up to 270°C, keep it for 2 hours, complete the curing, cool down and discharge. Crush the material to an average particle size D50<5 microns for use.

[0037] The polymer flame retardant prepared in this embodiment, after analysis: the phosphorus...

Embodiment 2

[0039] Embodiment 2 flame retardant is applied in glass fiber reinforced PBT

[0040] According to the ingredients in Table 1, mix the components uniformly in a high-speed mixer, extrude the uniformly mixed material through a twin-screw extruder, prepare a standard sample, and test the flame retardant performance, which can reach UL 94V2 ( 1mm thick). The migration and precipitation were tested under constant temperature and humidity conditions, and the results showed no migration.

Embodiment 3

[0041] Embodiment 3 is compounded with aluminum diethyl hypophosphite and applied in glass fiber reinforced PBT

[0042] According to the formula list in Table 1, mix each component uniformly in a high-speed mixer, extrude the uniformly mixed material through a twin-screw extruder, prepare a standard sample, and test the flame retardant performance, which can reach UL 94V0 ( 1mm thick). Compounded with aluminum diethyl hypophosphite, it can achieve better flame retardant grade with less addition amount, and has better synergy. The migration and precipitation were tested under constant temperature and humidity conditions, and the results showed no migration.

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Abstract

The invention discloses a nitrogen and phosphorus-containing thermosetting polyester polymeric flame retardant. A cross-linking point structure is as shown in the formula (I); the invention disclosesa novel polymeric flame retardant which integrates an acid source, a gas source and a char forming function; and the polymeric flame retardant has the characteristics of high flame resistance, high molecular weight, migration resistance, moisture resistance and high temperature resistance, does not affect mechanical properties of a substrate material, can be used independently and can also cooperate with a phosphorus-nitrogen-series flame retardant, and is applied to the materials, such as nylon, polyester and polyurethane.

Description

technical field [0001] The invention relates to the technical field of polymer flame retardants, in particular to a thermosetting polyester polymer flame retardant containing phosphorus and nitrogen elements and its preparation method and application. Background technique [0002] Most polymer materials are flammable, but in many application fields, flame retardant requirements are put forward for materials, such as electrical and electronic fields, wire and cable, furniture, construction, automotive interiors, textiles, etc., that is, flammable and combustible polymers are required The material is flame retardant. Usually, the flame retardancy of combustible polymer materials is achieved by adding flame retardants to the materials. Traditionally, brominated flame retardants are the main flame retardants, but a large number of studies have found that when flame-retardant polymer materials added with brominated flame retardants are burned in a fire, a large amount of dense s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/692C08L67/02C08L67/00C08L77/06C08L75/04C08K7/14C08K5/5313
CPCC08G63/6924C08L67/02C08L75/04C08L77/06C08L2201/02C08L2205/02C08L67/00C08K7/14C08K5/5313
Inventor 李金忠雷华
Owner JIANGSU LISIDE NEW MATERIAL