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Continuous preparation method of thermoplastic resin polymer

A thermoplastic resin and polymer technology, which is applied in the field of continuous preparation of thermoplastic resin polymers, can solve the problems of complexity of process flow, particularity of toughening agent and low production efficiency, and achieves low equipment cost, low production cost, good production efficiency and so on. The effect of technical effects

Inactive Publication Date: 2005-07-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the complexity of the process flow, the particularity of the toughening agent and the low production efficiency when adopting the continuous method to prepare the impact-grade SMA in the above-mentioned documents, and to provide a new thermoplastic resin polymerization method. continuous preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Semi-continuous startup phase:

[0020] First, dissolve 425 grams of Gaoshun gum PB (Yanshan BR9004) in 3825 grams of styrene and 1200 grams of butanone, add the dissolved glue into the first reaction kettle, and add the solution dissolved in 100 grams of butanone after rising to the reaction temperature. Initiator BPO 0.61 grams, and then add maleic anhydride solution, the preparation of the added solution is 720 grams of maleic anhydride + 1080 grams of methyl ethyl ketone + 1.9 grams of BPO, the reaction was carried out for 6 hours, and the reaction temperature was kept at 91 ° C The supplementary speed is 240 g / h, the stirring speed is 220 rev / min in the first 3 hours, and the stirring speed is 90 rev / min in the last 3 hours.

[0021] Double kettle continuous stage:

[0022] The first kettle adopts an anchor-type stirring paddle with a volume of 7.65 liters, and the second kettle adopts a double-screw ribbon-anchor stirrer with a volume of 9.33 liters. The first k...

Embodiment 2

[0024] Semi-continuous startup phase:

[0025] First 384 grams of high-shun gum PB (Yanshan BR9004) and 16 grams of maleic anhydride are dissolved in 4800 grams of styrene, the dissolved glue is added in the first reaction kettle, and the maleic anhydride solution is prepared after being raised to the reaction temperature. Addition, the preparation of supplementary solution is 196 grams of maleic anhydride + 549 grams of methyl ethyl ketone + 1.03 grams of BPO, the reaction is carried out for 4 hours in total, the reaction temperature is kept at 97 °C, the supplementary speed is 750 grams per hour, and the stirring speed in the first 2 hours The stirring speed was 220 rpm, and the stirring speed was 90 rpm in the last 2 hours.

[0026] Double kettle continuous stage:

[0027] The first kettle uses an anchor-type stirring paddle with a volume of 8.50 liters, and the second kettle uses a screw-drain tube to stir and has a volume of 8.86 liters. The feed composition of the firs...

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PUM

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Abstract

The continuous preparation method of thermoplastic resin polymer is characterized by that it adopts double-reactor still continuous self-body polymerization method. It includes the following steps: firstly, using styrene, rubber, partial maleic anhydride, partial butanene solvent and partial initiator and making them into mixed solution, then introducing the mixed solution into first reactor still with anchor paddle mixer, reacting for 2.5-4.5 hr. at 75-100 deg.c, and flowing out from the first reactor still, using residual maleic anhydride, residual solvent, residual initiator and antioxidant to make them into solution, then making the above-mentioned two solutions feed into second reactor still with screw-craft tube or double ribbon agitator, reacting for 2.5-5.5 hr. at 80-130 deg.C.

Description

technical field [0001] The present invention relates to a continuous preparation method for thermoplastic resin polymers, in particular to a continuous preparation method for thermoplastic resin polymers with good heat resistance and impact resistance. Background technique [0002] R-SMA (SMA for short) is a random copolymer of styrene (St) and maleic anhydride (MA), among which the impact-resistant SMA is a very important variety in this series, which not only maintains the transparent grade SMA (two Yuan) high heat resistance, compatibility and processing performance, and because the introduction of rubber for graft copolymerization overcomes the brittleness of binary SMA, it has a good market prospect. Compared with the binary SMA, the impact-resistant SMA introduces new problems such as phase transition, grafting reaction and system viscosity change due to the introduction of rubber in the polymerization, so the reaction mechanism and po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F2/02C08F2/44C08F212/08
Inventor 夏燕敏石正金王巍尤强陈丽娟王荣伟
Owner CHINA PETROLEUM & CHEM CORP