PVC Paste Resin

  • Abbreviation: PVC Emulsion Resin
  • Appearance: White powder
  • Main Types: P-440, P-450
  • CAS No.: 9002-86-2
  • HS Code: 3904109001
  • Molecular Formula: (C2H3CL)n

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    PVC paste resin, also called pvc emulsion resin, is made of vinyl chloride monomer (VCM) under the action of initiator, emulsifier and water, and at a certain temperature, a white emulsion will be obtained through polymerization reaction, and then spray-dried to obtain a white powder. Due to the fine particle size, it has no fluidity. After mixing with a plasticizer, it is stirred to form a stable suspension, which is then made into a PVC paste (or called PVC plastisol, PVC sol), and it is in this form that people use it to process it into the final product. In the pasting process, various fillers, diluents, heat stabilizers, foaming agents and light stabilizers are added according to the needs of different products.

    PVC paste resin has the characteristics of good chemical stability, easy control, convenient use, excellent product performance, stable performance, certain mechanical strength, easy coloring, etc., so it is widely used in artificial leather, toys, soft trademarks, wallpapers, paints and coatings, foamed plastics, etc.

    ItemPVC P-440PVC P-450
    Average polymerization degree1450±2001000±150
    Number of impurity particles ≤2020
    Volatile %≤0.40.4
    Brookfield viscosity 10-3Pa.S (50r/min, Resin : DOP=100:60) ≤50007000
    Sieving rate (greater 0.063μ m mesh) %≤11
    VCM Residue (μg/g) ≤1010

    With the continuous development of processed products, the development of polyvinyl chloride paste resin is very rapid. At present, the demand for it in the international market is increasing, and its development and utilization prospects are also very broad.

    PVC paste resin can produce some special products, such as plastic products, foam artificial leather, microporous plastic, steel plate plastic layer, automotive decorative materials, electrical materials, etc.

    It is widely used in artificial leather, decorative materials, floor leather, wall paper, industrial conveyor belts, sports grounds, paints, adhesives, toys, medical disposable gloves, daily decorative materials, electrical instruments and electrical tools and other fields.

    Compared with traditional suspension resins, PVC paste resins have the following advantages:

    • Less investment in equipment and simple processing technology.
    • Simple and cheap mold.
    • can be made into special shapes.
    • easy to foam.
    • The product has the characteristics of less heating times, and can be produced in a small amount and in many varieties.

    1. Microsuspension method

    First of all, make a part of VCM (5%) into a stable emulsion (with a particle size of about 1.0 μm) by mechanical homogenization, and then carry out polymerization (an oil-soluble initiator must be selected). The PVC paste resin produced by this method has excellent fluidity, less emulsifier consumption, and improved thermal stability and water resistance of the resin.

    2. Emulsion method

    The emulsion polymerization formula mainly includes VCM, water, water-soluble initiator and emulsifier. In particular, emulsion polymerization requires very strict stirring, and the initiation is carried out in the water phase, and the commonly used initiator is water-soluble persulfate. Generally, the latex particle size obtained by emulsion polymerization is less than 0.2 μm. In order to achieve the purpose of increasing the latex particle size, the emulsion seed polymerization method was developed to increase the latex particle size to about 1.0 μm.

    In emulsion polymerization, if there is already generated high polymer latex, control the material ratio and conditions. In principle, VCM only polymerizes on the generated latex particles, and no longer forms new particles; this generated high polymer latex The polymer latex is like a seed crystal, hence the name “emulsion seed polymerization”. But only a reasonable particle size is not enough, it must have an appropriate particle size distribution in order to obtain a PVC paste resin with excellent performance.

    3. The mixed method

    The mixed production process mainly integrates emulsion polymerization and microsuspension polymerization. In the whole reaction process, seeds after emulsion polymerization, other emulsifiers, initiators, various auxiliary agents and VCM are added to participate in the reaction. The mixing method uses C16 and C18 mixed linear alcohols and sodium lauryl sulfate or lauric acid amine to form an emulsifier to form a micro-emulsion, and the polymerization reaction is mainly carried out in micro-droplets. Adding seeds after emulsion polymerization makes the overall particle size distribution bimodal.

    Why Choose Fengbai

    • With more than 15+ years of export experience in plastic chemicals industry.
    • We can guarantee sufficient supply and fast delivery.
    • Free samples for testing and different packages to meet customers’ requirements.
    • Fengbai has a good cooperation with cargo agents and shipping companies.
    • Various certifications, good quality and services, competitive PVC paste resin price.

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