Preparation process of electron beam curing Wooden furniture coatings

1. Formulation design

2. Preparation process

1) Acrylic acid, styrene, methyl methacrylate ternary copolymerization esterification reaction

13.2 g of acrylic acid, 190.3 g of styrene, 180.3 g of methyl methacrylate, and 7.73 g of benzoyl peroxide (BPO) were added to a separatory funnel. Add 366 mL of xylene into the four-neck flask, start the stirrer, heat to 138 °C, start adding the mixed monomers in the separatory funnel dropwise, keep the temperature at 138 °C for 2 h, and complete the addition in 3 h to complete the reaction. Add 1 g of BPO and dissolve it in 34 mL of xylene at 138 °C and 4 h respectively, and drop each time at 138 °C for about 1 h to form a ternary random copolymer. After the above reaction for 5 h, the temperature of the reaction system was lowered to 100 °C, and N2 was introduced to fill the reactor with N2, then 120 g of phthalic anhydride was added, heated to 230 °C for 2 h, and the reaction was completed.

2) Synthesis of polyurethane

116g of toluene-2,4-diisocyanate (TDI) was placed in a four-necked flask, and 78 g of hydroxyethyl acrylate (EBA) was slowly added dropwise with a pager funnel, and the dripping was completed under constant stirring at 50 °C for 1 h, and finally at 60 °C Keep warm for 1 h.

3) Synthesis of modified acrylic resin

Lower the temperature of acrylic acid, styrene, and methyl methacrylate terpolymer to 50 °C, then slowly add the polyurethane with the molar number of moles, and complete the dropwise addition within 1 h under electric stirring, to obtain soybean oil fatty acid modified acrylic acid ester.

4) Preparation of paint

Take about 877g of the reaction product, adjust the temperature to 150°C, add 526g of cross-linking agent HDDA, lower the temperature to 60°C, and use 177g of ethyl acrylate to adjust the viscosity when the viscosity is high.

3. Main performance

High curing rate, suitable for high-speed mass industrial production.

4. Purpose

Electron beam cured wood coatings can be used as EB cured coatings for wood panels.