Open up the track of "specialization and innovation" of polyurethane materials - remember the key technologies and industrialization projects of the preparation of new polyurethane elastomers

Polyurethane elastomers are new material products
in strategic emerging industries.
Recently, Shandong Yinuowei Polyurethane Co.
, Ltd.
cooperated with Qingdao University of Science and Technology and East China University of Science and Technology to complete the project of "key technology and industrialization of new polyurethane elastomer preparation" won the first prize of scientific and technological progress of the Chinese Chemical Industry Society, and the product filled a number of domestic technical gaps, and the comprehensive technology reached the international advanced level
.

According to Chen Hailiang, executive deputy general manager of the company, polyurethane elastomers have the characteristics of high strength, good toughness and excellent wear resistance, and have both high elasticity of rubber and rigidity of plastics, and have a wide range
of applications.
At present, China's polyurethane elastomer preparation technology still has the following difficulties
.
For example, the conventional preparation process of polyurethane elastomer has a high reaction molding temperature and long time, and needs to be vulcanized after high temperature, with high energy consumption and low production efficiency; The preparation technology has fast gel in the foaming process, poor fluidity and reaction controllability, and prolongation of foaming time, which is prone to bubble collapse and uneven cells, which is difficult to meet the preparation needs of large-scale products.
The product has insufficient acid and alkali resistance and low temperature resistance, and the performance loss in corrosive and cold environments is serious, which is difficult to meet the needs of
special application fields.

In view of the above problems, the project team, with the support of the National Key Industry Revitalization and Technological Transformation Central Special Plan and the Zibo Innovation and Development Key Project Plan, developed a series of polyurethane elastomer preparation new technologies and realized industrialization
.

The results of this project mainly include three core preparation technologies
of polyurethane elastomer.
The first is the preparation technology
of rapid reaction molding polyurethane elastomer.
The project team realized the efficient preparation of polyurethane elastomer by using a self-developed high-efficiency composite catalyst, which solved the problems
of high energy consumption and low production efficiency caused by high reaction molding and post-vulcanization temperature and long time in the existing technology.
The second is the controllable preparation technology
of slow gel polyurethane microcellular elastomer.
This technology realizes controllable gel time, good product fluidity and uniform cell distribution of polyurethane elastomer, and solves the technical bottleneck
of short gel time, poor fluidity, uneven cell distribution, and difficulty in pouring to prepare large products in the preparation process of conventional polyurethane microcellular elastomer.
The third is the preparation technology
of low temperature resistance, high resilience, acid and alkali resistance polyurethane elastomer.
The strength maintenance rate of acid-resistant and alkali-resistant products developed by this technology is increased by more than 30% after soaking in acid and lye, and the glass transition temperature of low-temperature resistant products is reduced by more than 15 °C, which solves the problems of low rebound of conventional polyurethane elastomers, insufficient acid and alkali resistance and low temperature resistance, and expands the application range
of products in special fields such as corrosive and cold environments.

Chen Hailiang said that the project team has developed elastomer products with adjustable hardness, tensile strength, rebound and other properties, as well as low temperature resistance, acid and alkali resistance, and slow gel, which are widely used in intelligent manufacturing, medical treatment, sports and fitness and other fields
。 Among them, the polyurethane material products for medical CT slip rings developed by this project have the advantages of temperature resistance, heat conductivity and flame retardancy, which is the first in the domestic CT industry, breaking the monopoly of products of multinational companies and improving the independent production right of materials in the field of medical devices in China; The developed semiconductor CMP polishing dunnage, products are applied to silicon wafers, memory and other ultra-precision surface polishing, to realize the application of prepolymer products in the semiconductor industry; High-performance three-component MDI products are used in logistics, intelligent manufacturing and other fields with their advantages of high strength, low internal heat generation and high load, and their products are exported to Germany
.
In addition, the bio-based polyester TPU developed by the project team has superior performance, hardness range of 70A~64D, bio-based content of 30%~70%, excellent hydrolysis resistance and good mechanical properties, related products have been used in brand shoe factories, products are exported to Southeast Asia
.

Chen Hailiang said that China has become the world's largest production base of polyurethane raw materials and products and the most complete application fields
.
In the future, the scale of China's polyurethane market will continue to expand, bringing broad market space and huge development opportunities
to polyurethane manufacturers.
In the next step, Yinuowei will continue to focus on advantageous products and cutting-edge technologies, accelerate the transformation of scientific research achievements in the fields of wind power generation, solar photovoltaic, and new energy vehicle batteries, and realize product upgrading
.