1、 Consuming raw materials and methods

The raw materials for consuming synthetic resins come from abundant sources. Initially, coal tar and calcium carbide were the main commodities, but now they are mostly dominated by crude oil and natural gas commodities such as ethylene, propylene, benzene, indoor formaldehyde, and urea solution. The consumption methods of synthetic resin include self polymer, floating polymer, lotion polymerization, solution polymerization, melting polymer and interfacial polycondensation.

2、 Synthetic resin

Synthetic resins are high molecular weight compounds that are separated from low molecular weight raw materials such as monomers (such as ethylene, propylene, vinyl chloride, etc.) through strong polymer reactions and consumed as biomacromolecules. The common polymer methods in industrial production include self polymer, floating polymer, lotion polymerization and solution polymerization.

3、 Polymer method itself

The polymer itself is a polymer process that is terminated by monomers under the action of initiators or sources of heat, light, and radiation, without the need for other media. The characteristic is the childlike innocence of the product, without the need for complicated separation and purification, with simple practical operation and high utilization rate of consumer machinery and equipment. It can immediately consume high-quality products such as pipe fittings and boards, so it is also called small piece polymer. The disadvantage is that the viscosity of the raw materials often increases with the termination of aggregation and strong reactions, making mixing and heat conduction difficult, and the temperature of the strong reaction vessel difficult to control. The polymer method itself is commonly used for the consumption of methyl methacrylate (also known as organic glass panels), polyethylene, low-density polyethylene, polypropylene, polyester, and acyl esters.

4、 Floating polymer method

Floating polymer refers to the polymer process in which monomers are dispersed into a liquid by mechanical equipment mixing or shaking and dispersing agents, and generally float in water, thus also known as bead like polymer. The characteristics are: there is a lot of water in the strong reactor, the viscosity of the raw material is low, and it is very easy to conduct and manipulate heat; After polymerization, only simple separation, washing, and tedious processes are required to obtain epoxy resin products, which can be immediately used for molding, production, and processing; The product is relatively pure and average. The disadvantage is that the consumption of strong responders may not be as pure as the polymer method itself, and the continuous method cannot be used to terminate consumption. Floating polymers are widely used in industrial production. 75% of polyvinyl chloride epoxy resin is produced using the floating polymer method, and polyethylene is also primarily consumed using the floating polymer method. Strong responders are gradually becoming larger.

5、 Lotion polymerization