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A kind of high solid content SBS emulsion and preparation method thereof

A high solid content, emulsion technology, applied in the field of polymer modification, can solve the problems of unstable SBS emulsion, single choice of emulsifier, restricting efficient production, etc., achieving significant energy consumption benefits, improving production efficiency, and reducing transportation costs. Effect

Active Publication Date: 2021-09-21
WUHAN MUNICIPAL CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the solvents for the preparation of SBS emulsions are toluene, which contains toxic solvents, and the emulsifier is single. The prepared SBS emulsion is unstable and prone to problems such as demulsification, and the solid content is not high, which limits its efficient production.

Method used

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  • A kind of high solid content SBS emulsion and preparation method thereof
  • A kind of high solid content SBS emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of high solid content SBS emulsion, its preparation method comprises the steps:

[0032] 1) Preparation of SBS solution: Dissolve 30g of SBS in 140g of cyclohexane solution, stir evenly to form an SBS solution with a mass concentration of 12.5%;

[0033] 2) Preparation of composite emulsifier: Take 100g of water, add 6g of AC-181, 2g of OP-10, 2g of C 12 h 25 SO 4 Na, stirred evenly to form a compound emulsifier solution;

[0034] 3) Emulsification of high solid content SBS emulsion: shear the emulsifier aqueous solution at a low speed (about 2000rpm) for 3 minutes under a shearing machine, then slowly add the prepared SBS solution to it, add 0.1g of flocculant styrene, and increase the rotation speed To about 8000rpm, emulsify for 30min;

[0035] 4) Distillation and purification of high-solid content SBS emulsion: Purify the emulsified SBS emulsion in step 3) by vacuum distillation (pressure 84mmHg, temperature 45°C, time 8-12 hours), and the environmentally...

Embodiment 2

[0037] A kind of high solid content SBS emulsion, its preparation method comprises the steps:

[0038] 1) Preparation of SBS solution: Dissolve 40g of SBS in 150g of cyclohexane solution, stir evenly to form an SBS solution with a mass concentration of 16.7%;

[0039] 2) Preparation of composite emulsifier: Take 100g of water, add 6g of AC-181, 2g of OP-10, 2g of C 12 h 25 SO 4 Na, stirred evenly to form a compound emulsifier solution;

[0040] 3) Emulsification of high solid content SBS emulsion: shear the emulsifier aqueous solution at a low speed (about 2000rpm) for 3 minutes under a shearing machine, then slowly add the prepared SBS solution to it, add 0.1g of flocculant styrene, and increase the rotation speed To about 8000rpm, emulsify for 30min;

[0041] 4) Distillation and purification of high-solid content SBS emulsion: Purify the emulsified SBS emulsion in step 3) by vacuum distillation (pressure 84mmHg, temperature 45°C, time 8-12 hours), and the environmentally...

Embodiment 3

[0043] A kind of high solid content SBS emulsion, its preparation method comprises the steps:

[0044]1) Preparation of SBS solution: Dissolve 50g of SBS in 160g of cyclohexane solution, stir evenly and prepare a SBS solution with a mass concentration of 20%;

[0045] 2) Preparation of composite emulsifier: Take 100g of water, add 6g of AC-181, 2g of OP-10, 2g of C 12 h 25 SO 4 Na, stirred evenly to form a compound emulsifier solution;

[0046] 3) Emulsification of high solid content SBS emulsion: shear the emulsifier aqueous solution at a low speed (about 2000rpm) for 3 minutes under a shearing machine, then slowly add the prepared SBS solution to it, add 0.1g of flocculant styrene, and increase the rotation speed To about 8000rpm, emulsify for 30min;

[0047] 4) Distillation and purification of high-solid content SBS emulsion: Purify the emulsified SBS emulsion in step 3) by vacuum distillation (pressure 84mmHg, temperature 45°C, time 8-12 hours), and the environmentally...

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Abstract

The invention discloses a high-solid-content SBS emulsion. The preparation method comprises the following steps: dissolving solid SBS in cyclohexane and mixing uniformly to obtain an SBS premix; adding a complex emulsifier into water to prepare a water emulsion; The water emulsion is subjected to low-speed shearing, and then SBS premix and flocculant are added for high-speed shear emulsification. After standing still, cyclohexane is distilled under reduced pressure to obtain high-solid content SBS emulsion. In the present invention, cyclohexane, which enhances system stability, is selected as a solvent to dissolve SBS; and a composite emulsifier with higher surface activity is preferred, so that the obtained SBS emulsion has good stability, high solid content and wide applicability.

Description

technical field [0001] The invention belongs to the technical field of polymer modification, and in particular relates to a high-solid-content SBS emulsion and a preparation method thereof. Background technique [0002] Polymer modified asphalt emulsion has both advantages of modified asphalt and emulsified asphalt, and is widely used in road construction projects. According to the preparation method, it can be divided into emulsified modified asphalt which is first modified and then emulsified; modified emulsified asphalt which is first emulsified and then modified. [0003] Since the preparation of modified asphalt increases with the increase of SBS content and the stability of SBS modified asphalt becomes worse, the emulsification of modified asphalt requires an appropriate amount of SBS. Currently, modified asphalt with a content of less than 3% can be used Very good emulsification, the modified asphalt with SBS content of 3-5% can be emulsified, but the effect is limit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/07C08L53/02
Inventor 李强黄小霞罗宵高萍黄绍龙苗强卢吉唐光涛徐波向劲松代超储昭胜易琳张达江鑫
Owner WUHAN MUNICIPAL CONSTR GROUP
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