Modified acrylonitrile-styrene copolymer and preparation method thereof

Abstract

The invention discloses a modified acrylonitrile-styrene copolymer and a preparation method thereof. The preparation method comprises steps as follows: a blend is obtained by mixing an acrylonitrile-styrene copolymer, filler and a processing aid; the blend is added to an extruder via a main charging port, and glass fiber is added under traction of an auxiliary charging port of the extruder; the modified acrylonitrile-styrene copolymer is generated through mixing extrusion of the extruder at a preset main machine rotating speed and extruding processing temperature. A technology used in the whole preparation process is simple, and the prepared modified acrylonitrile-styrene copolymer has excellent use performance, tensile strength, impact resistance, bending strength and size stability and can meet the severe application environment requirements.

Description

technical field

[0001] The invention relates to the technical field of preparation of acrylonitrile-styrene copolymers, in particular to a modified acrylonitrile-styrene copolymer and a preparation method thereof. Background technique

[0002] Acrylonitrile-styrene copolymer, also known as AS resin (acrylonitrile-styrene copolymer), is a thermoplastic polymer obtained by copolymerization of styrene (ST) and acrylonitrile (AN). AS resin has excellent mechanical properties, its tensile strength, flexural strength, flexural modulus, hardness, and dimensional stability are relatively good, and it has high transparency and excellent chemical resistance. The resin with the best drug resistance.

[0003] However, existing acrylonitrile-styrene copolymers cannot be used in some special occasions due to their own performance limitations. For example, air-conditioning fan blades need to work in a harsh environment with alternating cold and heat, and the fan blades are often in high-...

Examples

preparation example Construction

[0040] The invention also provides a preparation method for the modified acrylonitrile-styrene copolymer. Such as figure 1 As shown, the method includes the following steps:

[0041] 101: A blend is obtained by mixing an acrylonitrile-styrene copolymer, a filler, and a processing aid.

[0042] In the actual production process, the blend of the above raw materials can be obtained by various suitable methods, for example, by a high-speed mixer at a temperature of 40-60° C., and mixed for 3-6 minutes until a homogeneous blend is obtained.

[0043] Specifically, acrylonitrile-styrene copolymers, fillers and processing aids described in one of the above examples or multiple components and / or ratios described in the examples may be combined for mixing. Of course, other suitable ratios or specific ingredients may also be used.

[0044] 102: The blend is fed into the extruder through the main feeding port, and the glass fiber is drawn into the extruder through the auxiliary feeding...

Embodiment 1

[0052] S1. In parts by weight, weigh the following raw material components: 73.7 parts of AS resin, 20 parts of glass fiber, 3 parts of compatibilizer, 0.3 part of antioxidant, 0.5 part of lubricant, 0.5 part of coupling agent and 2 parts of filler .

[0053] S2. Add the raw material components except glass fiber into the high-speed mixer, and mix for 3-7 minutes at 40-60° C. to obtain a blend.

[0054] S3. Place the blend in the feed hopper of the twin-screw extruder and mix again.

[0055] S4. Add the homogeneously mixed blend into the barrel, and extrude and granulate through the twin-screw extruder. During the extrusion and granulation process, the glass fiber is drawn and added through the auxiliary feeding port of the twin-screw extruder.

[0056] Wherein, the main engine of the twin-screw extruder is 300-380RPM, and the extrusion processing temperature is respectively: 160-180°C in the first zone, 160-180°C in the second zone, 170-190°C in the third zone, and 180-200°C...

Embodiment 2

[0058] S1. In parts by weight, weigh the following raw material components: 81.7 parts of AS resin, 12 parts of glass fiber, 3 parts of compatibilizer, 0.3 part of antioxidant, 0.5 part of lubricant, 0.5 part of coupling agent and 2 parts of filler .

[0059] S2. Add the raw material components except glass fiber into the high-speed mixer, and mix for 3-7 minutes at 40-60° C. to obtain a blend.

[0060] S3. Place the blend in the feed hopper of the twin-screw extruder and mix again.

[0061] S4. Add the homogeneously mixed blend into the barrel, and extrude and granulate through the twin-screw extruder. During the extrusion and granulation process, the glass fiber is drawn and added through the auxiliary feeding port of the twin-screw extruder.

[0062] Wherein, the main engine of the twin-screw extruder is 300-380RPM, and the extrusion processing temperature is respectively: 160-180°C in the first zone, 160-180°C in the second zone, 170-190°C in the third zone, and 180-200°C...

technical field

[0001] The invention relates to the technical field of preparation of acrylonitrile-styrene copolymers, in particular to a modified acrylonitrile-styrene copolymer and a preparation method thereof. Background technique

[0002] Acrylonitrile-styrene copolymer, also known as AS resin (acrylonitrile-styrene copolymer), is a thermoplastic polymer obtained by copolymerization of styrene (ST) and acrylonitrile (AN). AS resin has excellent mechanical properties, its tensile strength, flexural strength, flexural modulus, hardness, and dimensional stability are relatively good, and it has high transparency and excellent chemical resistance. The resin with the best drug resistance.

[0003] However, existing acrylonitrile-styrene copolymers cannot be used in some special occasions due to their own performance limitations. For example, air-conditioning fan blades need to work in a harsh environment with alternating cold and heat, and the fan blades are often in high-...

Examples

preparation example Construction

[0040] The invention also provides a preparation method for the modified acrylonitrile-styrene copolymer. Such as figure 1 As shown, the method includes the following steps:

[0041] 101: A blend is obtained by mixing an acrylonitrile-styrene copolymer, a filler, and a processing aid.

[0042] In the actual production process, the blend of the above raw materials can be obtained by various suitable methods, for example, by a high-speed mixer at a temperature of 40-60° C., and mixed for 3-6 minutes until a homogeneous blend is obtained.

[0043] Specifically, acrylonitrile-styrene copolymers, fillers and processing aids described in one of the above examples or multiple components and / or ratios described in the examples may be combined for mixing. Of course, other suitable ratios or specific ingredients may also be used.

[0044] 102: The blend is fed into the extruder through the main feeding port, and the glass fiber is drawn into the extruder through the auxiliary feeding...

Embodiment 1

[0052] S1. In parts by weight, weigh the following raw material components: 73.7 parts of AS resin, 20 parts of glass fiber, 3 parts of compatibilizer, 0.3 part of antioxidant, 0.5 part of lubricant, 0.5 part of coupling agent and 2 parts of filler .

[0053] S2. Add the raw material components except glass fiber into the high-speed mixer, and mix for 3-7 minutes at 40-60° C. to obtain a blend.

[0054] S3. Place the blend in the feed hopper of the twin-screw extruder and mix again.

[0055] S4. Add the homogeneously mixed blend into the barrel, and extrude and granulate through the twin-screw extruder. During the extrusion and granulation process, the glass fiber is drawn and added through the auxiliary feeding port of the twin-screw extruder.

[0056] Wherein, the main engine of the twin-screw extruder is 300-380RPM, and the extrusion processing temperature is respectively: 160-180°C in the first zone, 160-180°C in the second zone, 170-190°C in the third zone, and 180-200°C...

Embodiment 2

[0058] S1. In parts by weight, weigh the following raw material components: 81.7 parts of AS resin, 12 parts of glass fiber, 3 parts of compatibilizer, 0.3 part of antioxidant, 0.5 part of lubricant, 0.5 part of coupling agent and 2 parts of filler .

[0059] S2. Add the raw material components except glass fiber into the high-speed mixer, and mix for 3-7 minutes at 40-60° C. to obtain a blend.

[0060] S3. Place the blend in the feed hopper of the twin-screw extruder and mix again.

[0061] S4. Add the homogeneously mixed blend into the barrel, and extrude and granulate through the twin-screw extruder. During the extrusion and granulation process, the glass fiber is drawn and added through the auxiliary feeding port of the twin-screw extruder.

[0062] Wherein, the main engine of the twin-screw extruder is 300-380RPM, and the extrusion processing temperature is respectively: 160-180°C in the first zone, 160-180°C in the second zone, 170-190°C in the third zone, and 180-200°C...

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