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Views:5 Author:Site Editor Publish Time: 2021-01-19 Origin:Site
As a new coating material, polyurea has changed the concept and cognition of previous coatings by engineers and added new knowledge of coatings. Since the polyurea coating can withstand the full impact of a sledgehammer and the most severe abrasion, it also has satisfactory flexibility. When the obvious expansion and contraction causes concrete cracking or steel structure deformation, the coating film will not crack, even Under abnormal conditions such as outstanding pipelines and sinking, it can still cover the entire surface of the workpiece. Let's take a look at the detailed composition of polyurea spraying.
1. Polyurea spraying: It is an elastomer substance produced by the reaction of amino compound component and isocyanate component. Isocyanates can be both aromatic and aliphatic. The amino compound component in between can be monomers, polymers, isocyanate derivatives, prepolymers and semi-prepolymers.
2. Prepolymers and semi-prepolymers are made by reacting amino-terminated or hydroxyl-terminated compounds with isocyanate. The R component must be composed of an amino-terminated resin and an amino-terminated chain extender. The amino-terminated resin must not contain any hydroxyl components and catalysts, but can contain additives that facilitate the dispersion of the pigment.
Polyurethane high-pressure foaming machine is a special equipment for infusion and foaming of polyurethane foam. Polyurethane high-pressure foaming machines are essential in many production areas. Polyurethane high-pressure foaming machine is a kind of precision equipment. In the actual operation pr
High-pressure foaming machine, also known as foam generator, the product of the foaming machine is foam, and what we need in the production process is also foam. In the work, polyurethane foaming has to go through two stages of foaming and curing.The high-pressure foaming machine will present variou
As a common product, high-pressure foaming machine has widely appeared in our real life, and the development trend is increasing:1. Polyurethane products are made of isocyanate and polyether as the main raw materials. Under the action of various additives such as blowing agent, catalyst, flame retar
The high-pressure foaming machine works for a long time, it is easy to heat up too high, what are the ways to cool down?Today, I will talk to you about the temperature reduction of the high-pressure foaming machine.Large flow box type high pressure foaming machineWhen using a high-pressure foaming m
Because foaming relies on heat, if there is no heat, the foaming agent in the system cannot evaporate and foam plastic cannot be formed. The heat comes from two aspects, one is the heat produced by the chemical reaction, and the other is the heat provided by the environment. The heat of chemical rea
A considerable part of auto parts, especially interior parts, are polyurethane foam products. The polyurethane raw material storage system, polyurethane raw material pre-mixing system, high-pressure foaming machine and molded foaming production line used in the production of polyurethane foamed auto
In order to meet the requirements of epidemic prevention and control, on the afternoon of February 6, Hightop Group held its 2020 annual summary and commendation meeting with the theme of "Gathering Strength and Breaking the Convention" at the headquarters of Hightop Group. The conference comprehens
Polyurethane foaming machine is a large-scale equipment, which is used in many production enterprises. The emergence of polyurethane foaming machine production line provides companies with a lot of convenience, and the performance of this equipment is also very good in all aspects. Many people are m
The high-pressure precision foaming machine is carefully designed by the designer according to the user, and there are many models of it. Users can choose the model that suits them according to their needs to purchase. The high-pressure precision foaming machine in the market is economical. It is ve
1. Raw material system. The pressure of the raw material tank should be dry air, and nitrogen should be used as much as possible. Before starting the machine every day, turn the turntable of the raw material filter to the left or right a few times, and remove 200~300ml of raw material from the botto
