Rubber and plastic industry

Methacrylate butadiene styrene(MBS)

Product Description:
Butadiene styrene methacrylate is an excellent PVC modifier. Butadiene styrene methacrylate (MBS) is an important copolymer that is often used as a modifier for PVC (polyvinyl chloride). This article will introduce the basic characteristics and parameters of MBS, and discuss why MBS has an outstanding effect in PVC modification, and provide practical cases to illustrate.

Butadiene methacrylate (MBS) is a copolymer of butadiene methacrylate (MBA), styrene (Styrene) and butadiene styrene (Butadiene). MBS material has good transparency, weather resistance and chemical corrosion resistance.


The main parameters

  • Appearance: light straw yellow transparent solid particles

  • Density: 1.09~1.11

  • Product light transmittance: up to 90%

  • Refractive index: 1.538

  • Elongation: >12%

  • Tensile strength: >38.42MPa

  • Notched impact strength (23°C): >28.03kJ/㎡

  • Rockwell hardness: 100

  • Heat distortion temperature: 84°C (1.82MPa)

  • Chemical properties: high strength. High rigidity, can maintain sufficient rigidity at 85-90 ℃. It has good low temperature resistance and still has good toughness at -40 °C. Excellent transparency, light transmittance can reach 80%-90%, oil resistance, weak acid resistance, weak alkali resistance, transparency and UV aging resistance are its outstanding advantages.

  • Solubility: soluble in acetone, benzene, toluene, dichloroethane and other organic solvents

  • Storage conditions: Store in a cool, ventilated, dry warehouse, fire-proof, moisture-proof

Main feature

  • a. Impact resistance: MBS material can significantly improve its impact resistance in PVC, making it more able to withstand external impact without breaking easily.

  • b. Transparency: MBS has high transparency, which can make PVC products have good light transmission, and is suitable for applications that require transparent or translucent appearance.

  • c. Weather resistance: MBS modified PVC material has good weather resistance and can resist the erosion of external environmental factors such as ultraviolet rays, oxidation and temperature changes.

  • d. Machinability: MBS has good compatibility with PVC, is easy to process and shape, and can adapt to various production process requirements.

Advantages of MBS as PVC modifier:

MBS has several outstanding advantages as a PVC modifier, making it a widely adopted choice:

  • a. Improve impact resistance: Adding MBS can significantly improve the impact resistance of PVC products, making it less likely to crack or break when impacted by force. This makes MBS-modified PVC materials very popular in applications that require impact resistance, such as construction materials, automotive parts, etc.

  • b. Maintain transparency: Compared with some other modifiers, MBS has less effect on the transparency of PVC and can maintain good transparency of PVC products. This makes MBS modified PVC materials widely used in products that require transparency, such as transparent pipes, window frames, etc.

  • c. Improve weather resistance: MBS modified PVC material has good weather resistance and can maintain stable performance in outdoor environment for a long time. It can resist the erosion of factors such as ultraviolet radiation, oxidation and temperature changes, and prolong the service life of PVC products.

  • d. Good processability: MBS has good compatibility with PVC, can be evenly mixed with PVC, and is easy to melt, flow and form during processing. This makes MBS-modified PVC materials suitable for various processing techniques, such as extrusion, injection molding and calendering.

Usage and Dosage

Butadiene styrene methacrylate (MBS) is used as a PVC modifier, and its usage and dosage will vary according to specific applications and needs. The following are general usage and dosage guidelines:


Pre-mixing method: MBS and PVC resin are pre-mixed, and then processed by extrusion, injection molding or calendering.

Synthesis method: Copolymerize MBS and PVC resin in a reactor to form modified PVC.


The amount of MBS can be determined according to the desired modification effect and the requirements of the final product. Generally speaking, the dosage range of MBS is between 5% and 30% of the mass of PVC resin. The specific dosage should be adjusted and optimized according to the actual situation.

Here are some common usage examples:

PVC window frame

MBS is used as a modifier for PVC window frames, and the recommended dosage is 10% to 20% of the mass of PVC resin. This amount significantly improves the impact resistance of the window frame while maintaining clarity and weather resistance.

PVC pipes

For PVC pipes, the amount of MBS is generally between 5% and 15% of the mass of PVC resin. Appropriate addition of MBS can improve the impact resistance and weather resistance of the pipeline while maintaining good processing performance.

PVC sheet

In the preparation process of PVC sheet, the recommended dosage of MBS is usually between 15% and 30% of the mass of PVC resin. This amount can significantly improve the impact resistance and transparency of the board, while improving weather resistance.


It should be noted that the specific dosage should be determined according to the requirements of the product, the type and brand of PVC resin used, and the processing technology. It is recommended to conduct experiments and optimization in practical applications to determine the best MBS dosage and effect. Also, always follow the product instructions and recommendations provided by the supplier to ensure the proper use of MBS as a PVC modifier.

Example description:

Taking PVC window frames as an example, MBS has played an important role as a PVC modifier. In the traditional unmodified PVC window frame, due to the brittleness of the PVC material, it is easy to break, especially under the impact of external force or low temperature environment. However, 10% to 20% of the amount of PVC resin is added during the reproduction process, so that by adding MBS as a modifier, the impact resistance of PVC window frames can be significantly improved. When an external impact force acts on the window frame, the high elasticity of MBS absorbs energy and alleviates the impact of the impact, thereby greatly reducing the risk of window frame cracking.

In addition, MBS modified PVC window frames can also maintain good transparency. This allows light to filter through the window frames, providing plenty of natural light while creating a bright interior environment.

In addition, the weather resistance of MBS enables PVC window frames to resist the erosion of ultraviolet rays, oxidation and temperature changes for a long time, and is not prone to problems such as color fading, aging or damage. This enables the MBS modified PVC window frame to maintain stable performance under various harsh climate conditions and prolong its service life.

In summary, butadiene styrene methacrylate as a PVC modifier has outstanding performance in improving impact resistance, maintaining transparency, improving weather resistance and improving processability. Its wide application in PVC products, such as construction materials, auto parts and electronic products, endows these products with higher quality and reliability.