High heat-resistant crushing-resistant copolymerization composition and continuous preparation method

Abstract

The invention relates to the an impact-resistant co-polymeric composite with high heat resistance and a continuous preparation method thereof. The co-polymeric composite has high heat resistance, thermal stability, impact resistance, compatibility, transparency and processability. The composite contains the following materials with the following weight percent: (A) 1 to 20 percent of elastomer, (B) 25 to 98 percent of ethylene aromatic monomer, (C) 0 to 30 percent of olefinic unsaturated nitrile monomer and (D) 1 to 50 percent of olefinic dibasic acid derivative monomer. The composite can be conveniently prepared by main body or little solvent through the continuous copolymerization method by a main body or a solvent. The continuous preparation technique method is that a plurality of reaction kettles are serially connected with an exhaust double screw extruder, wherein, the polymerization temperature of the reaction kettle is 70 to 150 degrees centigrade DEG C and the percent conversion is 20 to 85 percent. The reaction temperature of the extruder is 130 to 300 DEG Cdegrees centigrade and the detention time is 1 to 10 minutes. The invention is characterized in by high monomer percent conversion and soft manufacture, and can conveniently synthesize the impact-resistant co-polymeric composite with high heat resistance.

Description

technical field

[0001] The invention relates to a high heat-resistant impact copolymer composition and its continuous preparation method. Background technique

[0002] Vinyl aromatic monomer-maleic anhydride copolymer composition is a kind of polymer material with wide application. However, the maleic anhydride group is easily hydrolyzed, and its copolymers are also easily degraded to generate CO 2 , which will affect its molding process and performance stability; at the same time, this type of copolymer composition often has poor impact resistance, which also limits the further expansion of its application field.

[0003] Replacing maleic anhydride groups with substituted maleimide groups can effectively improve the hydrolysis resistance, heat resistance and thermal stability of the copolymer composition. The preparation method of this type of copolymer composition mainly includes direct copolymerization of vinyl aromatic monomer and substituted maleimide monomer, and imi...

Examples

Embodiment 1

[0039] 1) Mix 10 kg of high-cis polybutadiene rubber, 37.5 kg of styrene, 7.5 kg of maleic anhydride, 0.3 kg of dibenzoyl peroxide (BPO), and 20 kg of butanone into the first reaction In the still, react at 130 ℃, the outlet conversion rate of the first reaction still is controlled at 40%;

[0040] 2) 37.5 kilograms of styrene, 7.5 kilograms of maleic anhydride, 0.3 kilograms of BPO, 20 kilograms of butanone and 25.6 kilograms of aniline were mixed and continuously added to the second reactor together with the effluent of the first reactor, reacted at 150 ° C, and The outlet conversion rate of the second reactor is controlled at 70%;

[0041] 3) Add 17.1 kg of aniline and the mixture of the effluent from the second reactor into a vented twin-screw extruder at a temperature of 230° C., a vacuum degree of 0.02 MPa at the vent port, and an average residence time of 10 minutes. , to obtain a high heat-resistant impact copolymer composition. Its composition and properties are rep...

Embodiment 2

[0043] Repeat embodiment 1, the high cis polybutadiene rubber addition in step 1) is reduced to 1 kilogram, and the styrene addition is improved to 68.6 kilograms, and the maleic anhydride addition is reduced to 0.7 kilogram, and the BPO consumption improves to 0.42 Kilogram, the methyl ethyl ketone consumption improves to be 28 kilograms, step 2) in the styrene addition is reduced to 29.4 kilograms, and the maleic anhydride addition is reduced to 0.3 kilogram, and the BPO consumption is reduced to 0.18 kilogram, and the butanone consumption is reduced to 12 kilograms, The amount of aniline added is reduced to 0, and the amount of aniline added in step 3) is reduced to 5.7 kg, and the data and results are recorded in Table 1.

Embodiment 3

[0045] Example 1 was repeated without the addition of BPO, and the data and results are reported in Table 1.

technical field

[0001] The invention relates to a high heat-resistant impact copolymer composition and its continuous preparation method. Background technique

[0002] Vinyl aromatic monomer-maleic anhydride copolymer composition is a kind of polymer material with wide application. However, the maleic anhydride group is easily hydrolyzed, and its copolymers are also easily degraded to generate CO 2 , which will affect its molding process and performance stability; at the same time, this type of copolymer composition often has poor impact resistance, which also limits the further expansion of its application field.

[0003] Replacing maleic anhydride groups with substituted maleimide groups can effectively improve the hydrolysis resistance, heat resistance and thermal stability of the copolymer composition. The preparation method of this type of copolymer composition mainly includes direct copolymerization of vinyl aromatic monomer and substituted maleimide monomer, and imi...

Examples

Embodiment 1

[0039] 1) Mix 10 kg of high-cis polybutadiene rubber, 37.5 kg of styrene, 7.5 kg of maleic anhydride, 0.3 kg of dibenzoyl peroxide (BPO), and 20 kg of butanone into the first reaction In the still, react at 130 ℃, the outlet conversion rate of the first reaction still is controlled at 40%;

[0040] 2) 37.5 kilograms of styrene, 7.5 kilograms of maleic anhydride, 0.3 kilograms of BPO, 20 kilograms of butanone and 25.6 kilograms of aniline were mixed and continuously added to the second reactor together with the effluent of the first reactor, reacted at 150 ° C, and The outlet conversion rate of the second reactor is controlled at 70%;

[0041] 3) Add 17.1 kg of aniline and the mixture of the effluent from the second reactor into a vented twin-screw extruder at a temperature of 230° C., a vacuum degree of 0.02 MPa at the vent port, and an average residence time of 10 minutes. , to obtain a high heat-resistant impact copolymer composition. Its composition and properties are rep...

Embodiment 2

[0043] Repeat embodiment 1, the high cis polybutadiene rubber addition in step 1) is reduced to 1 kilogram, and the styrene addition is improved to 68.6 kilograms, and the maleic anhydride addition is reduced to 0.7 kilogram, and the BPO consumption improves to 0.42 Kilogram, the methyl ethyl ketone consumption improves to be 28 kilograms, step 2) in the styrene addition is reduced to 29.4 kilograms, and the maleic anhydride addition is reduced to 0.3 kilogram, and the BPO consumption is reduced to 0.18 kilogram, and the butanone consumption is reduced to 12 kilograms, The amount of aniline added is reduced to 0, and the amount of aniline added in step 3) is reduced to 5.7 kg, and the data and results are recorded in Table 1.

Embodiment 3

[0045] Example 1 was repeated without the addition of BPO, and the data and results are reported in Table 1.

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