CN1128843C - Flame retardant ABS special material - Google Patents

Abstract

A flame-retardant ABS special material for household appliances, automobile parts and the like is prepared by adding polyvinyl chloride, decabromodiphenyl ether, antimony trioxide, modifier chlorinated polyethylene, stabilizer, lubricant and the like into a high-speed mixer to obtain a flame-retardant master batch for standby, mixing ABS and the flame-retardant master batch and the like in the high-speed mixer at a high speed for 5-10 minutes at room temperature, taking out the mixture, transferring the mixture into a screw extruder, and extruding and granulating the mixture at 160-190 ℃. Therefore, the process is short, the product cost is low, and the comprehensive performance of the product is excellent.

Description

Flame retardant ABS special material

Field: The present invention is a flame-retardant ABS special material used in household appliances and auto parts and the like.

Background technology: the present invention is made by compounding general-purpose ABS and flame retardant masterbatch in different proportions. Its process flow is shown in Figure 1:

The main components of flame retardant masterbatch are: polyvinyl chloride, decabromodiphenyl ether, tetrabromobisphenol A, antimony trioxide, chlorinated polyethylene and other components.

The stabilizers in the flame retardant masterbatch are common tribasic lead sulfate and dibasic lead phosphite

Song Moudao of Nankai University in China and others have developed a ABS/PVC injection molding alloy (CN-1120563A) made of ABS and PVC resin as the main raw materials, adding stabilizers, modifiers, flame retardants, lubricants and pigments. This product has excellent comprehensive performance, but its heat resistance is poor, and its heat distortion temperature is 75-80°C, which limits its application.

American researchers have developed an impact-resistant flame-retardant thermoplastic composition (CN-1034936). The flame retardant performance of this product meets the requirements of UL-94V-0 level. But this product has added certain difficulty to processing owing to needing to add nitrile-based rubber, has also increased cost simultaneously.

The flame-retardant ABS special material developed by the present invention has good heat resistance, and the heat distortion temperature is 80-90°C, and the heat-resistant temperature can be increased by the demand of the product, and the process flow of the product is short, the product cost is low, and the resistance is high. The flammability performance reaches the UL-94V-0 grade index, and the comprehensive performance is relatively excellent.

Contents of the invention

The object of the present invention is to provide a kind of flame-retardant ABS special material used for household electrical appliance housing and auto parts. The product has short technological process, low product price, flame retardant performance up to UL-94V-0 grade index, good heat resistance performance and excellent comprehensive performance.

The product of the present invention consists of: 50-70 parts of general-purpose ABS, 30-50 parts of flame-retardant masterbatch (containing 30-40 parts of polyvinyl chloride, 0.3-1.0 parts of lubricant, 1.5-5 parts of heat-resistant additive, stable agent 0.5-2.5 parts, pigment 0.25-1.5 parts).

The production process steps are:

First prepare the flame retardant masterbatch: polyvinyl chloride (70-90), decabromodiphenyl ether (2-8) or tetrabromobisphenol A (2-8), antimony trioxide (2-5), modified Add chlorinated polyethylene (3~9), stabilizer (2~5), lubricant (1~3) etc. into the high-speed mixer, mix at high speed for 5-10 minutes, and transfer to the screw extruder , Extrude and pelletize at a temperature of 155-175°C to obtain a flame-retardant masterbatch for use. Then mix ABS (50~70) and flame retardant masterbatch (30~50) in a high-speed mixer at room temperature for 5-10 minutes at high speed, take it out and transfer it to a screw extruder, and heat it at 160-190°C Down extrusion granulation, you can get ABS flame retardant special material.

The reason why the product developed by the present invention is excellent in heat resistance and flame retardancy is that a heat-resistant additive and a flame-retardant masterbatch with relatively stable performance are added to the blend. In the technological process of the present invention, only a high-speed mixer and a screw extruder are needed, and no other equipment needs to be added. Therefore, the technological process is short and the product cost is low, but the comprehensive performance of the product is relatively excellent.

The more outstanding features of the invention are: short technological process, good heat resistance of the product, which can be improved according to different uses of the product, and the flame retardancy can reach the index of UL-94V-0 level.

Description of drawings

Fig. 1, Fig. 2 are process flow diagrams of the present invention.

specific implementation

Add the flame retardant and stabilizer into the high-speed mixer according to the ratio shown in Table 1, mix at room temperature for 10 minutes, and then extrude and granulate to make a flame retardant masterbatch. Then an appropriate amount of flame-retardant masterbatch is blended with general-purpose ABS, extruded and granulated to obtain a special material for flame-retardant ABS.

Table 1 Example 1 Flame-retardant ABS special material product raw material ratio Flame retardant ABS special material I II III IV Universal ABS 100 100 100 100 Flame Retardant Masterbatch PVC 40 30 50 40 Decabromodiphenyl ether 5 5 Tetrabromobisphenol A 5 4 Antimony trioxide 2 2 2 1 Chlorinated polyethylene 5 5 8 10 tribasic sulfuric acid 2 2 3 2 Lead dibasic phosphite 1 1 2 1 Stearic acid 1 1 1 1 The main performance indicators of the flame-retardant ABS special material obtained in this example are as follows: Tensile strength (MPA) 42.1-47.6 (GB1040-79) Melt index (220°C, 10KG) (g/10min) 8.1-11.948 (GB3682-83) Notched impact strength (23°C) (J/m) 190-273 (GB1043-79) heat distortion temperature (°C) 86-96 (GB1634-79) flame retardant performance UL-94 VO level

Embodiment 2: the prepared flame-retardant ABS special material is applied to the TV casing, and its formula is as follows: 100 parts (parts by weight) of general-purpose ABS, and the formula of the flame-retardant masterbatch is: 40 parts of polyvinyl chloride, decabromobi 5 parts of phenyl ether, 2 parts of antimony trioxide, 2 parts of chlorinated polyethylene, 2 parts of tribasic lead sulfate, 1 part of dibasic lead phosphite, and 1 part of stearic acid. First, put the flame retardant and stabilizer in the above flame retardant masterbatch into a high-speed mixer for high-speed mixing at room temperature, and then extrude and granulate to prepare the flame retardant masterbatch. The general-purpose ABS is blended with an appropriate amount of flame-retardant masterbatch, and then extruded and granulated to obtain a flame-retardant ABS special material. The main properties of the special material are as follows: flame-retardant UL-94 V-O grade heat distortion temperature ( ° C) 90 Intellectual impact strength (23 ° C) (J/M) 267 melting index (220 ° C, 10kg) (G/10min) 10.56 proportion 1.17 The above -mentioned flame retardant ABS special material is used to make the TV shell, and its performance indicators It fits the bill perfectly.

Implementation reference example:

Flame retardant extrusion grade ABS special material, its formula is: 100 parts of general-purpose ABS, 46 parts of flame retardant masterbatch, 9 parts of lubricant, after drying treatment, extrusion and granulation after blending, flame retardant extrusion can be obtained Grade ABS special material, this material can be used to make products with flame retardant requirements such as household appliance shells and automotive interior parts.

Claims (3)

1. Flame retardant ABS special material, which is made of general ABS raw materials and flame retardant masterbatch, characterized in that: flame retardant masterbatch consists of 70-90 parts of polyvinyl chloride, 2-8 parts of decabromodiphenyl ether Add tetrabromobisphenol A, 2-5 parts of antimony trioxide, 3-9 parts of modifier chlorinated polyethylene, 2-5 parts of stabilizer, and 1-3 parts of lubricant into the high-speed mixer for high-speed mixing After 5-10 minutes, transfer to a screw extruder, extrude and pelletize at a temperature of 155-175°C, and obtain a flame-retardant masterbatch for use. Then add 50-70 parts of general-purpose ABS raw materials and 30-50 parts of the flame-retardant masterbatch prepared above into the high-speed mixer, mix at room temperature for 5-10 minutes at high speed, take it out and transfer it to the screw extruder, at 160 Extrude and granulate at a temperature of ~190°C to obtain special flame-retardant ABS materials. 2. The flame-retardant ABS special material according to claim 1, characterized in that: the stabilizer used is tribasic lead sulfate and/or dibasic lead phosphite. 3. The flame-retardant ABS special material according to claim 1, characterized in that: the lubricant used is stearic acid.

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