A kind of polyurethane coating liquid, a kind of paint protective film and preparation method

Abstract

The invention discloses a coating solution, especially a polyurethane coating solution, which is composed of the following raw materials in parts by weight: water-based polyol resin: 30-50 parts; water-based curing agent: 5-12 parts; nano-silver wire Dispersion liquid: 100‑200 parts; 16‑mercaptohexadecane‑1‑alcohol: 0.5‑5 parts; diluent: 50‑100 parts. At the same time, the invention also discloses a paint protection film and a preparation method of the paint protection film. The water-based polyol resin and the water-based curing agent in the coating liquid of the present invention cooperate with the nano-silver wire (ie, infrared reflective particles) in the nano-silver wire dispersion liquid, and the obtained polyurethane coating can reflect part of the infrared rays in sunlight. It can be seen that the present invention solves the technical problem of "enabling the polyurethane coating liquid to have infrared reflection". The present invention can reflect part of the infrared rays in sunlight when coated on the base material (for example, automobile paint protection film), and has good infrared reflection durability.

Description

technical field [0001] The invention relates to a coating liquid, in particular to a polyurethane coating liquid. At the same time, the present invention also relates to a paint protection film and a preparation method of the paint protection film. Background technique [0002] Paint protection film, also known as "invisible car cover", is a layer of transparent protective film attached to the surface of the car body. This product not only has the function of self-repairing scratches, but also can effectively prevent scratches and sand. It also isolates the contact between the car paint and the air, which can prevent acid rain, insects, bird droppings, etc. from corroding the paint surface of the car body. [0003] The existing general paint protection film can block the damage of rainwater, ultraviolet rays and pollutants to the paint surface, but it does not have a protective effect on the damage of infrared rays to automobiles. The temperature of the car body exposed to...

AI Technical Summary

Problems solved by technology

However, there are currently two main methods for blocking infrared rays. One is to sputter a special metal layer on the surface of the film. This method is mostly used on the surface of polyethylene terephthalate (PET) hard substrates, TPU or Soft substrates such as PVC soft substrates are not suitable. During installation, they will be stretched and deformed, causing the uniform and dense metal layer to crack, reducing the infrared reflectivity and affecting the appearance of the product.

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