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Halogen-free fire retardant containing benzoxazine and polymer material comprising same

A technology of benzoxazine and flame retardant, which is applied in the field of halogen-free flame retardants, can solve the problems of low cost and high production cost, and achieve the effects of good flame retardancy, good compatibility and good barrier effect

Inactive Publication Date: 2011-11-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its production cost is high
[0006] This field lacks a halogen-free flame retardant system with low cost, easy processing, good flame retardancy and wide applicability

Method used

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  • Halogen-free fire retardant containing benzoxazine and polymer material comprising same
  • Halogen-free fire retardant containing benzoxazine and polymer material comprising same
  • Halogen-free fire retardant containing benzoxazine and polymer material comprising same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0058] The preparation process of Comparative Examples 1-2 and Examples 1-8: After a certain amount of ABS or HIPS is plasticized on a double-roll mill at 170-180°C, antioxidants (mass Antioxidants 1076 and 168 with a ratio of 1:1), benzoxazine resin, microcapsule red phosphorus and other raw materials, after mixing evenly, put them in the mold after discharging, and heat press on a flat vulcanizing machine at 180°C for 10 Minutes, then cold press at room temperature for 10 minutes, and then molded boards for performance testing. The test standard is shown in Table 6.

[0059] The physical properties of the benzoxazine-based halogen-free flame-retardant ABS in the comparative examples and examples are shown in Table 2, and the test standards are shown in Table 6. In Example 1, 9 parts of bisphenol A-type benzoxazine was used to replace 9 parts of microencapsulated red phosphorus, and the tensile strength, impact strength and flame retardancy of the material prepared were all ...

Embodiment 9~10

[0065] After mixing all the components in proportion (see Table 3), put them into a twin-screw extruder for melt extrusion, and the extrusion temperature is 200~250°C. The extruded material is granulated and post-processed, and then injection molded to obtain test specimens. Antioxidants are selected from antioxidant 1076 and 168 composite antioxidants with a mass ratio of 1:1. Table 3 flame retardant PC / ABS alloy formula / (weight part)

[0066]

[0067] The physical properties of the benzoxazine-based halogen-free flame-retardant PC / ABS alloys in the comparative examples and examples are shown in Table 4, and the test standards are shown in Table 6.

[0068] Table 4 Physical Properties of Flame Retardant PC / ABS Alloy

[0069] project Comparative example Example 9 Example 10 Tensile strength (MPa) 52 46 42 Notched impact strength (KJ m -2 ) 42 38 32 Flame retardant (1.6mm) combustion V-1 V-0

Embodiment 11

[0071] Mix 10 parts of BPOZ with 10 parts of red phosphorus powder and 0.2 parts of magnesium hydroxide evenly, and then add them to a twin-screw extruder with a temperature set at 120°C to extrude and granulate to obtain a non-toxic compound containing benzoxazine and red phosphorus. Halogen flame retardant A.

[0072] Mix 10 parts of ABS with 1.8 parts of the above-mentioned halogen-free flame retardant A containing benzoxazine and red phosphorus, extrude and granulate on a twin-screw extruder at 200°C, and then put the obtained flame-retardant ABS on an injection molding machine at Sample preparation by injection molding at 220°C. The properties of the obtained samples are shown in Table 5

[0073] Table 5 Example 11 sample properties

[0074] project Example 11 Tensile strength (MPa) 35 Notched impact strength (KJ m -2 ) 6.3 Flame retardant (1.6mm) V-0

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Abstract

The invention relates to a halogen-free fire retardant containing benzoxazine and polymer material comprising same. A small quantity of metallic oxide or hydroxide can be simultaneously added to serve as a fire-retardant synergy agent. Phosphorus oxide, phosphoric acid, metaphosphoric acid, polyphosphoric acid and the like generated by burning red phosphorus is dewatered through reacting with a great quantity of phenolic hydroxyl generated by solidifying benzoxazine resin to produce an inorganic-organic hybridized barrier layer, the barrier layer has good wettability to a matrix polymer, and barrier property is improved. Meanwhile, an organic part has an adsorption function on organic smoke gas so as to greatly improve fire-retardant efficiency. A small quantity of metallic oxide or hydroxide can enhance the stability of the barrier layer to further improve fire-retardant effect. The composite is applied to polymers, polymer based composites and products of the polymers and the polymer based composites, and fire-retardant effect is good. The halogen-free fire retardant disclosed by the invention has the characteristics of low cost, wide application range and good fire-retardant property.

Description

technical field [0001] The invention relates to a flame-retardant non-halogen flame retardant for polymers and a polymer material containing the non-halogen flame retardant. Background technique [0002] Most of the polymer materials used in large quantities in our daily life are extremely flammable. For example, the limiting oxygen index of ABS is 18.3-20, and the limiting oxygen index of high-impact polystyrene (HIPS) is 18, which are extremely flammable materials, and polyolefin materials are also flammable in the air. In practical applications, it is necessary to add flame retardants to make them flame retardant. [0003] At present, traditional halogenated flame retardants are mainly used in the domestic market, among which bromine-containing organic compounds have the best flame retardant effect. Although the flame retardant effect of halogenated flame retardants is good, more smoke, harmful gases and corrosive gases are produced during combustion, which will cause h...

Claims

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Application Information

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IPC IPC(8): C08K5/357C08K3/02C08K9/10C08K3/22C08L25/04C08L23/00
CPCC08L23/00C08K9/10C08K3/02C08L23/02C08K3/22C08L25/04C08K5/357C08L2201/02
Inventor 王光开林晓丹杨兵范志山
Owner SOUTH CHINA UNIV OF TECH
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