Optimized production process of terminal hydroxy liquid polybutadiene

Abstract

An optimized process for preparing liquid-phase hydroxy-terminated polybutadiene from butadiene includes such steps as washing the butadiene with alkali solution and then water, adding the butadiene and H2O2 as trigger to organic solvent, polymerizing reaction, cooling to 60-85 deg.C, degassing, filtering, deposition for layering, washing oil phase with hot water, dewatering and filter. Its advantages are short process, high output rate and high quality of product.

Description

technical field

[0001] The invention relates to a production process of hydroxyl-terminated liquid polybutadiene. Background technique

[0002] Hydroxyl-terminated liquid polybutadiene, also known as polybutadiene diol, referred to as HTPB, is a liquid polymer developed in the 1960s. It can be made into a three-dimensional network structure through chain extension and cross-linking. Elastomer, because it has the same properties as solid rubber, is also called liquid rubber. In 1971, ARCO in the United States built an industrialized production device, and then the former Soviet Union, France, and Japan also had corresponding industrialized devices put into production. It was first used as a solid rocket propellant and a rocket engine lining. In addition to military use, it also has many uses in civilian use: (1) Modifier of rubber and plastic; (2) Electrical potting material; (3) Sealing material; (4) Adhesive; (5) Casting tires and repairing ...