Low-shrinkage quick-forming TPU for rubber wheel injection molding and preparation method thereof

Abstract

The invention discloses a low-shrinkage quick-forming TPU for rubber wheel injection molding. The low-shrinkage quick-forming TPU is mainly prepared from the following raw materials by mass: 700-800 parts of polyester diol, 50-100 parts of dichloromethane, 50-80 parts of benzaldehyde, 10-20 parts of a wear-resistant reinforcing agent, 5-15 parts of nano silicon dioxide, 5-10 parts of nano graphene, 20-30 parts of sodium borohydride, 5-10 parts of long glass fiber, 2-10 parts of a lubricant, 2-10 parts of a catalyst and a proper amount of a solvent. The low-shrinkage quick-forming TPU for rubber wheel injection molding and the preparation method thereof well maintain the environmental protection characteristic of polyurethane, enable a polyurethane elastomer rubber wheel to meet the requirements for environmental protection, bearing capacity and wear resistance, at the same time improves the rubber wheel production efficiency, reduces the rejection rate of rubber wheel production, shortens the injection molding period, and reduces the shrinkage rate.

Description

technical field [0001] The invention belongs to the field of chemical materials, and more specifically relates to a low-shrinkage rapid prototyping TPU used for injection molding of rubber tires and a preparation method thereof. Background technique [0002] Injection molding is a method of producing shapes for industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding technology is the fastest growing of all plastic processing technologies because it can form products with complex shapes quickly, in batches, and at low cost. With the expansion of industry demand and the broadening of product application scope, my country's injection molding industry has made great progress, but there are still places that need to be improved, such as more pollution and lower production technology. [0003] Polyurethane elastomer has a large load-bearing capacity, wear resistance, oil resistance, and is firmly bonded to the metal ske...

AI Technical Summary

Problems solved by technology

With the expansion of industry demand and the expansion of product application range, my country's injection molding industry has made great progress, but there are still places that need to be improved, such as more pollution and lower production technology.