Method for modifying ABS resin by coating rubber powder with butadiene styrene rubber

An ABS resin and styrene-butadiene rubber technology, which is applied in the field of styrene-butadiene rubber-coated rubber powder modified ABS resin, can solve the problem of compatibility between rubber powder and waste plastics, strict control of process parameters, and impact of blended materials. The problem of low strength and bending strength can achieve the effect of good reinforcement, improved mechanical properties, and improved compatibility.

CN111171503AInactive Publication Date: 2020-05-19湖南绿色再生资源有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-05-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for modifying ABSresin by coating rubber powder with butadiene styrene rubber, which comprises the following steps: (1) mixing liquid butadiene styrene rubber with therubber powder to react to obtain a modified rubber powder; (2) melting waste ABS resin, adding the modified rubber powder, and premixing to obtain a mixture; and (3) adding an antioxidant and a heat stabilizer into the mixture, and carrying out extrusion granulation to obtain the modified ABS resin. The butadiene styrene rubber is adopted to coatthe rubber powder to form asurface active layer, therubber powder does not need to be subjected to desulfurization treatment, and the active layer can form chemical bonds between the rubber powder and the raw materials to enhance the compatibility between the rubber powder and the ABS resin, so that the reinforcing effect is better achieved, the technological process is simple, and secondary pollution such as waste gas is avoided.
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Description

technical field

[0001] The invention relates to the technical field of polymer materials, in particular to a method for coating rubber powder modified ABS resin with styrene-butadiene rubber. Background technique

[0002] In order to realize the comprehensive utilization of waste rubber and plastics, waste rubber products can be crushed into rubber powder and added to rubber or other products for recycling. Due to the use, reprocessing and other processes of recycled ABS resin, its rubber phase is seriously aged, resulting in a significant decrease in its impact strength, which cannot meet the use requirements. Therefore, in order to adjust its performance, the content of its rubber phase can be adjusted by adding recycled rubber powder, thereby improving its mechanical properties. However, the surface of untreated waste rubber powder particles is uneven and burr-like, which leads to poor combination with the matrix and poor compatibility, which reduces some properties of t...

Examples

experiment example

[0046] (1) Wash the waste tire rubber powder with a particle size of 100-200 mesh with water at room temperature for 20 minutes, dry it and treat it with a silane coupling agent at 20-30°C for 0.5-2 hours, and then mix it with liquid styrene-butadiene rubber for 20 minutes ~30min to obtain modified rubber powder. The types of silane coupling agent, the molecular weight of liquid styrene-butadiene rubber, and the weight parts of silane coupling agent, rubber powder and liquid styrene-butadiene rubber are shown in Table 1.

[0047] (2) The waste ABS resin is pretreated through processes such as sorting, crushing, cleaning, and air-drying, and then melted at 175°C, and then the modified rubber powder prepared in step (1) and waste ABS resin are added at 175°C Pre-mix for 2 to 2.5 hours to obtain a mixture. See Table 1 for the parts by weight of waste ABS resin added.

[0048] (3) Raise the temperature of the mixture to 185-200° C., add an antioxidant and a thermal stabilizer, b...