Low-temperature curing catalyst for water-based and solvent-based baked coatings.
PM-21 is a curing catalyst used for polyester, acrylic, and alkyd resin systems that crosslink with HMMM-type resins in solvent-based and water-based paints containing high solids. ----------------------------------------------------------------------- 【Main Components and Properties】 A solution of a special stable block-type para-toluenesulfonic acid Specific gravity at 20/4℃: 1.02 Appearance: White liquid Para-toluenesulfonic acid content: 19.5–21% -----------------------------------------------------------------------
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basic information
**Features** 1. PM-21 promotes the crosslinking reaction between resins containing hydroxyl groups and amino resins. In particular, low-reactivity melamine resins of the HMMM type require curing accelerators that lower the baking temperature and shorten the baking time, and PM-21 is effective as an accelerator. 2. PM-21 has significantly lower viscosity increase during storage compared to free para-toluenesulfonic acid, making it superior for storage. 3. PM-21 lowers the baking temperature by an additional 10°C to 20°C compared to other block-type para-toluenesulfonic acids such as morpholine and aminomethylpropanol. **Addition Amount and Method** The addition amount varies depending on the reactivity of the main resin, the proportion of melamine resin, and the amount of pigment used, but generally, it is added at around 1.5% to 6% of the total resin solids. It can be added during the redown or dilution stage. It is advisable to add 10% to 20% of polar solvents such as alcohols, glycols, or esters into the mixed solvent.
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Hardening catalyst
Company information
Meiyu Sangyo Co., Ltd. is engaged in the manufacturing and sales of chemical products. We have a manufacturing plant for para-toluenesulfonic acid in Wakayama and handle contract manufacturing of sodium p-toluenesulfonate and various curing agents. Please feel free to contact us if you have any requests. *Notice* (2022/1/28) Some of our products have been designated as pharmaceutical-grade toxic substances under the Poisonous and Deleterious Substances Control Law. For more details, please refer to the announcements on our official website. https://www.meiyusangyo.co.jp/news/
