Intumescent flame retardant used for outer cover of ABS (acrylonitrile-butadiene-styrene) appliance switch as well as preparation and application of intumescent flame retardant

Abstract

The invention relates to an intumescent flame retardant used for an outer cover of an ABS (acrylonitrile-butadiene-styrene) appliance switch as well as a preparation and an application of the intumescent flame retardant. The flame retardant is prepared from components in parts by weight as follows: 40-80 parts of piperazine pyrophosphate, 20-60 parts of melamine or a melamine derivative, 0-15 (except 0) parts of a charring agent, 0-15 (except 0) parts of a synergist, 0.2-1 part of an antioxidant and 0-1 (except 0) part of a smoke inhibitor. During preparation, substances are mixed and stirred uniformly, and the product is obtained; during application, 0.4-0.5 g of the flame retardant is added to every 1 g of ABS resin. Compared with the prior art, the flame retardant is easy to prepare and has good compatibility with an ABS matrix, the surface of a flame-retardant ABS material prepared from the flame retardant does not absorb moisture and does not migrate, and the flame-retardant ABS material can reach the UL94V-0 level, has remarkably reduced specific optical density Ds10 of smoke and can be used for processing and preparation of the outer cover of the ABS appliance switch with an injection molding process and can pass tests of 750 DEG C glowing filaments.

Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and relates to an intumescent flame retardant used for an ABS electrical switch cover and its preparation and application. Background technique

[0002] ABS resin is a general-purpose thermoplastic engineering plastic formed by the ternary copolymerization of acrylonitrile-butadiene-styrene. It has high impact strength, excellent corrosion resistance and low temperature resistance, and good molding processability. It can be used Injection, extrusion, foaming, blow molding, and calendering are used to make various parts and components for use in the automotive industry, electronic and electrical industries, light industrial appliances, textiles, and construction. Among them, in the field of electronic and electrical industries, ABS resin is commonly used in household electrical appliance parts such as electrical switch covers.

[0003] However, since ABS resin is a flammable polymer mat...

Examples

Embodiment 1-8

[0027] The addition amounts listed in the data in the table below are respectively weighed for piperazine pyrophosphate, melamine or melamine derivatives, char-forming agent, synergist, antioxidant and smoke suppressant, and weighed at 500-1000 rpm Fully mix in a high-speed mixer for 15-30 minutes to prepare an intumescent flame retardant for ABS electrical switch covers.

[0028]

[0029]

[0030] Mix the PA-758 ABS resin produced by Taiwan Chimei Co., Ltd. with the above-mentioned flame retardant at a mass ratio of 7:3, and then extrude, cool, and dry at 180-220°C with a twin-screw extruder. Dry and pelletize to obtain halogen-free flame-retardant ABS particles, and then use an injection molding machine to prepare flame-retardant ABS test samples at 190-220°C, and conduct flame-retardant tests. The results are shown in the following table:

[0031]

[0032] It can be seen from the above table that the flame-retardant ABS plastic prepared by the flame retardant prepa...

Embodiment 9

[0034] An intumescent flame retardant for an ABS electrical switch cover, the flame retardant comprises the following components and content in parts by weight:

[0035]

[0036] Among them, the particle size of piperazine pyrophosphate is D90<30 μm; the carbon forming agent is phenolic resin; the synergist includes montmorillonite; the antioxidant is 2246; the smoke suppressant is magnesium hydroxide.

[0037] The preparation method of the flame retardant is as follows: after mixing piperazine pyrophosphate, melamine or melamine derivatives, a char forming agent, a synergist, an antioxidant and a smoke suppressant, the mixture is stirred at 800 rpm for 15 minutes.

[0038] When applying, add 0.47g flame retardant to every 1g ABS resin.

Embodiment 10

[0040] An intumescent flame retardant for an ABS electrical switch cover, the flame retardant comprises the following components and content in parts by weight:

[0041]

[0042] Among them, the particle size of piperazine pyrophosphate D90<30μm; melamine and melamine derivatives include melamine, melamine phosphate and melamine pyrophosphate; dextrin is the char-forming agent; bentonite is the synergist; 264 is the antioxidant; Aluminum hydroxide.

[0043] The preparation method of the flame retardant is as follows: after mixing piperazine pyrophosphate, melamine or melamine derivatives, a char forming agent, a synergist, an antioxidant and a smoke suppressant, the mixture is stirred at 700 rpm for 20 minutes.

[0044] When applying, add 0.43g flame retardant to every 1g ABS resin.

technical field

[0001] The invention belongs to the technical field of polymer materials, and relates to an intumescent flame retardant used for an ABS electrical switch cover and its preparation and application. Background technique

[0002] ABS resin is a general-purpose thermoplastic engineering plastic formed by the ternary copolymerization of acrylonitrile-butadiene-styrene. It has high impact strength, excellent corrosion resistance and low temperature resistance, and good molding processability. It can be used Injection, extrusion, foaming, blow molding, and calendering are used to make various parts and components for use in the automotive industry, electronic and electrical industries, light industrial appliances, textiles, and construction. Among them, in the field of electronic and electrical industries, ABS resin is commonly used in household electrical appliance parts such as electrical switch covers.

[0003] However, since ABS resin is a flammable polymer mat...

Examples

Embodiment 1-8

[0027] The addition amounts listed in the data in the table below are respectively weighed for piperazine pyrophosphate, melamine or melamine derivatives, char-forming agent, synergist, antioxidant and smoke suppressant, and weighed at 500-1000 rpm Fully mix in a high-speed mixer for 15-30 minutes to prepare an intumescent flame retardant for ABS electrical switch covers.

[0028]

[0029]

[0030] Mix the PA-758 ABS resin produced by Taiwan Chimei Co., Ltd. with the above-mentioned flame retardant at a mass ratio of 7:3, and then extrude, cool, and dry at 180-220°C with a twin-screw extruder. Dry and pelletize to obtain halogen-free flame-retardant ABS particles, and then use an injection molding machine to prepare flame-retardant ABS test samples at 190-220°C, and conduct flame-retardant tests. The results are shown in the following table:

[0031]

[0032] It can be seen from the above table that the flame-retardant ABS plastic prepared by the flame retardant prepa...

Embodiment 9

[0034] An intumescent flame retardant for an ABS electrical switch cover, the flame retardant comprises the following components and content in parts by weight:

[0035]

[0036] Among them, the particle size of piperazine pyrophosphate is D90<30 μm; the carbon forming agent is phenolic resin; the synergist includes montmorillonite; the antioxidant is 2246; the smoke suppressant is magnesium hydroxide.

[0037] The preparation method of the flame retardant is as follows: after mixing piperazine pyrophosphate, melamine or melamine derivatives, a char forming agent, a synergist, an antioxidant and a smoke suppressant, the mixture is stirred at 800 rpm for 15 minutes.

[0038] When applying, add 0.47g flame retardant to every 1g ABS resin.

Embodiment 10

[0040] An intumescent flame retardant for an ABS electrical switch cover, the flame retardant comprises the following components and content in parts by weight:

[0041]

[0042] Among them, the particle size of piperazine pyrophosphate D90<30μm; melamine and melamine derivatives include melamine, melamine phosphate and melamine pyrophosphate; dextrin is the char-forming agent; bentonite is the synergist; 264 is the antioxidant; Aluminum hydroxide.

[0043] The preparation method of the flame retardant is as follows: after mixing piperazine pyrophosphate, melamine or melamine derivatives, a char forming agent, a synergist, an antioxidant and a smoke suppressant, the mixture is stirred at 700 rpm for 20 minutes.

[0044] When applying, add 0.43g flame retardant to every 1g ABS resin.

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