Vinyl resin

Nov. 06, 2019

Vinyl chloride vinyl acetate copolymer, also known as vinyl resin, is abbreviated as PVVA. Vinyl chloride (VC) is the main chain segment, vinyl chloride and vinyl acetate copolymers resins, and a small amount of the third or fourth monomers are added to get the multi-component modified copolymers, which are collectively called vinyl chloride copolymers.

Vinyl resin is widely used in floor tile, card based sheet, coating, ink, adhesive and other fields due to its excellent properties such as internal plasticization and low melting temperature. Vinyl resin is one of the most important varieties of vinyl chloride copolymer.

The polymer of PVVA copolymer has amorphous structure, which enlarges the distance between polymer chains and increases the flexibility of the polymer. Therefore, PVVA copolymer resin keeps the advantages of vinyl resin and improves the performance of PVC from the aspect of internal plasticization, which can meet the needs of some special purposes. It is mainly reflected in that PVVA copolymer resin has lower melting temperature than PVC homopolymer resin with similar molecular weight, thus improving processing performance; at the same time, it also improves impact resistance and transparency of products, but the heat resistance decreases.

Vinyl Chloride And Vinyl Acetate Copolymer

Vinyl Chloride And Vinyl Acetate Copolymer

The synthesis technology of PVVA copolymer resin has been studied since 1960s and 1970s in China. But most of the products are suspension PVVA binary copolymers, and the products are constantly improving in solubility, cohesiveness, particle shape, solution viscosity stability and other indicators. With the increasing demand for vinyl resin in China, these enterprises of chloroacetate resin are forced to develop continuously in technology, and the production of domestic vinyl resin is also growing continuously. In terms of market segmentation, it is not only increasing in the low-end market, but also changing the scene of dependence on imports in the high-end market. Kunshan PG Chem Co., Ltd. seized the market opportunity and became a first-class manufacturer of vinyl resins to meet the international demand for this product.

With the development of polymer rheology, resin processing aids and processing equipment, PVC post-processing blending modification technology can make up for the shortcomings of copolymerized resin in solution and melt molding. However, the demand for adhesion materials such as coatings and inks is increasing, and the advantages of PVVA resin are reflected in these fields. Therefore, the proportion of PVVA resin used in adhesion materials is increasing.

The manufacture of coatings, inks and binders requires high molecular weight, solubility, solution viscosity stability, adhesion and heat resistance of vinyl resin. Among them, the problems of molecular weight, solubility and solution viscosity stability are related to the uniformity of PVVA copolymerization chain segment distribution and resin particle shape. The low content of VAC in the copolymers or the non-uniformity of two-component copolymerization chain segment can affect these properties. The influence law of VAC monomer and chain transfer agent on vinyl resin particles is not known, which will also cause quality fluctuation. Some application requirements of binary vinyl resin are difficult to meet, so it must be modified, such as hydroxyl modified vinyl chloride terpolymers, carboxyl modified PVVA resin, Sulfonate Modified vinyl resin, epoxy modified PVVA resin, water-based vinyl resin, etc. the performance of modified products has been improved, and the shortcomings of binary resin have been solved.

The binary and ternary vinyl chloride vinyl acetate copolymers manufactured by PG Chem company with suspension polymerization technology and micro suspension technology can completely replace the same model products of Dow in the United States. Some products have even better service performance and are highly praised by the market.

In recent years, in the development of vinyl resin, PG chemical industry is not only following the import, but also complying with the current environmental pressure and constantly improving. In recent years, in many overseas exhibitions, we show new and old customers the superior properties of ester soluble hydroxyl products, such as ester solubility, dispersion and adhesion.

The development of vinyl resin witnessed the development of human industrial civilization. We are looking forward to the development of domestic products as a benchmark.