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Guangdong Pengde polyurethane coating film on the surface is not as effective as the inside

Guangdong Pengde polyurethane coating film on the surface is not as effective as the inside

  • Categories:News
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  • Time of issue:2020-08-22 11:00
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(Summary description) The defects on the surface of polyurethane coating film are more serious than those inside the film. It is difficult to obtain dry film with coating thickness over 80 m without air bubbles by single construction method at room temperature. Forced drying can help to overcome the above problems. However, the foam problem of two-component polyurethane coating is not completely caused by the formation of carbon dioxide, but may also be caused by the mixing of bubbles during the process of construction. In particular, the polyol component also has the function of foam stabilization, which makes the foam in the coating difficult to be eliminated. The mixture of emulsion particles is very important to optimize the properties of polyurethane coating. The ideal emulsion particle size is uniform, which is conducive to the particle coalescence and the spread of polyisocyanate to polyol particles, and finally to form a uniform film. A certain amount of shear is often required in mixing. If the two components are very close in viscosity, it's easy to mix them. Association thickener was used for the polyol component and appropriate solvent for the isocyanate component was helpful for the polymerization of the emulsion in the formulation of waterborne polyurethane. Products recommended by Guangdong Pengde Rubber & Plastic Co., LTD. : Polyurethane round belt polyurethane V-shaped belt polyurethane rubber roller Polyurethane rubber wheel Polyurethane non-standard parts polyurethane adhesive polyurethane tripod polyurethane patterned belt polyurethane cushion pad www.pengde-pu.com

Guangdong Pengde polyurethane coating film on the surface is not as effective as the inside

(Summary description)

The defects on the surface of polyurethane coating film are more serious than those inside the film. It is difficult to obtain dry film with coating thickness over 80 m without air bubbles by single construction method at room temperature. Forced drying can help to overcome the above problems.
However, the foam problem of two-component polyurethane coating is not completely caused by the formation of carbon dioxide, but may also be caused by the mixing of bubbles during the process of construction. In particular, the polyol component also has the function of foam stabilization, which makes the foam in the coating difficult to be eliminated.
The mixture of emulsion particles is very important to optimize the properties of polyurethane coating. The ideal emulsion particle size is uniform, which is conducive to the particle coalescence and the spread of polyisocyanate to polyol particles, and finally to form a uniform film. A certain amount of shear is often required in mixing. If the two components are very close in viscosity, it's easy to mix them.
Association thickener was used for the polyol component and appropriate solvent for the isocyanate component was helpful for the polymerization of the emulsion in the formulation of waterborne polyurethane. Products recommended by Guangdong Pengde Rubber & Plastic Co., LTD. : Polyurethane round belt polyurethane V-shaped belt polyurethane rubber roller Polyurethane rubber wheel Polyurethane non-standard parts polyurethane adhesive polyurethane tripod polyurethane patterned belt polyurethane cushion pad www.pengde-pu.com

  • Categories:News
  • Author:
  • Origin:
  • Time of issue:2020-08-22 11:00
  • Views:
Information

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The defects on the surface of polyurethane coating film are more serious than those inside the film. It is difficult to obtain dry film with coating thickness over 80 m without air bubbles by single construction method at room temperature. Forced drying can help to overcome the above problems.
However, the foam problem of two-component polyurethane coating is not completely caused by the formation of carbon dioxide, but may also be caused by the mixing of bubbles during the process of construction. In particular, the polyol component also has the function of foam stabilization, which makes the foam in the coating difficult to be eliminated.
The mixture of emulsion particles is very important to optimize the properties of polyurethane coating. The ideal emulsion particle size is uniform, which is conducive to the particle coalescence and the spread of polyisocyanate to polyol particles, and finally to form a uniform film. A certain amount of shear is often required in mixing. If the two components are very close in viscosity, it's easy to mix them.
Association thickener was used for the polyol component and appropriate solvent for the isocyanate component was helpful for the polymerization of the emulsion in the formulation of waterborne polyurethane. Products recommended by Guangdong Pengde Rubber & Plastic Co., LTD. : Polyurethane round belt polyurethane V-shaped belt polyurethane rubber roller Polyurethane rubber wheel Polyurethane non-standard parts polyurethane adhesive polyurethane tripod polyurethane patterned belt polyurethane cushion pad www.pengde-pu.com

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