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15

2025-04

Public Notice of Baishide Clean Production Audit Information

2025-04-15

17

2025-03

Jiangsu Baiside Environmental Information Disclosure Form

2025-03-17

06

2021-12

What are the main raw materials used in the production of polyester resin? What performance indicators are involved?

The main raw materials for producing polyester resins include phthalic anhydride, maleic anhydride, fumaric acid, propylene glycol, ethylene glycol, diethylene glycol, and styrene. Polyester resin is the abbreviated term for unsaturated polyester adhesives. Unsaturated polyester adhesives are primarily composed of unsaturated polyester resin, an initiator, a promoter, fillers, thixotropic agents, and other additives. A linear‑structured polyester resin containing –CH=CH– double bonds in its backbone can be blended with olefinic monomers such as styrene, acrylates, and vinyl acetate; under the action of initiators and promoters, it polymerizes at room temperature to form an insoluble, non‑melting product. The English abbreviation for unsaturated polyester is UP. It is mainly used in the production of coil coatings.

2021-12-06

06

2021-12

Saturated polyester resin

Saturated polyester resins (oil-free alkyd resins) are primarily used in the production of coil coatings. Depending on their properties and structure, they can serve as topcoats, primers, or backcoats for coil coatings, and are also employed in inks and in saturated polyester resins for thermal lamination films. Our 312C oil-free alkyd resin is a high‑molecular‑weight linear saturated polyester resin successfully developed by our plant, mainly applied in adhesives for thermal lamination films and as a primer in coil coatings, offering excellent adhesion along with a well‑balanced combination of hardness and toughness. Epoxy‑based primers are characterized by strong substrate adhesion and excellent compatibility with topcoats; moreover, they exhibit outstanding corrosion resistance and chemical resistance.

2021-12-06

06

2021-12

Basic Classification of Polyester Resins

By using different polybasic acids and polyols, it is possible to synthesize saturated polyester resins of various types and with distinct properties. If only linear diols and dicarboxylic acids are employed, the resulting resin contains exclusively linear chains; if the polybasic acids include aromatic rings—such as phthalic anhydride, terephthalic acid, or trimellitic anhydride—the product will feature aromatic ring structures. Furthermore, when additional components are introduced via chemical reactions beyond polyols and polybasic acids, the resulting resin is classified as a modified polyester. When synthesizing polyester resins with linear polyols and polybasic acids, the resulting polymer exhibits a linear architecture and excellent flexibility, making it suitable primarily for certain applications.

2021-12-06

06

2021-12

What is the difference between epoxy resin and polyester?

I. Differences in Composition 1. Epoxy Resin: A condensation product of epichlorohydrin and bisphenol A or polyols. 2. Polyester: A general term for polymers obtained through the polycondensation of polyols and polyacids. It primarily refers to polyethylene terephthalate (PET), and conventionally also includes polybutylene terephthalate (PBT) and aromatic polyesters, among other linear thermoplastic resins. II. Differences in Application Areas 1. Epoxy Resin: Epoxy resin is mainly used in the coatings and electronics industries. Approximately one quarter of its applications are in composite material molding, with a particular emphasis on printed circuit boards in the electronics sector. 2. Polyester: PET can be processed into fibers, films, and plastic products.

2021-12-06

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