Method for preparing phenolic resin from phenols residues and application thereof to production of coating

[0037] Embodiment 1, the preparation of phenolic resin

[0038]Accurately weigh 100 parts of cresol residues, 200 parts of rosin, 20 parts of water, 0.5 parts of zinc oxide, and 1 part of ammonia water, add them to the reaction kettle, heat up, and when the system reaches 80 ° C, add 60 parts of formaldehyde dropwise; , and kept at this temperature for 5 hours to make it fully react; after detecting complete dissolution (detecting oil solubility and solubility, resin: linseed oil = 1: 4, fully dissolved; resin: toluene = 1: 1, fully dissolved), Add 20 parts of xylene, continue to heat up to 100°C, and dehydrate. After the removal, 100 parts of soybean oleic acid, 60 parts of glycerol, 40 parts of phthalic anhydride, 3 parts of zinc oxide, and 0.1 part of silicone oil were added to the reaction kettle in sequence, and the temperature was continued. , measure the viscosity and acid value, when the viscosity of the system is 5-10s (Grignard tube 25 ℃), the solid acid value is ≤ 20mgKOH/g, and the temperature is lowered to below 200 ℃; # The solvent oil is diluted to the viscosity of 10-20s (Grignard tube at 25°C), the solid acid value is ≤20mgKOH/g, the solid content is 70±2%, filtered and packaged to obtain the phenolic resin to cool down. The measurement of each of the above-mentioned raw materials is in parts by weight.

[0039] After measurement, the performance indicators of phenolic resin are as follows:

[0040] The performance index of phenolic resin liquid is viscosity 10-20s (Grignard tube 25°C), solid acid value ≤20mgKOH/g, solid content 70±2%; directly brush the resin liquid (equivalent to making the corresponding novolac), Its workability is good, surface dry ≤ 5h, solid dry ≤ 15h, after drying to form a film, its gloss (20°) ≥ 130%, flexibility 1mm, tackiness ≤ grade 2, resistance to boiling water for 0.5h without foaming and falling off, resistant to 120 # Solvent oil ≥48h. It can be used to prepare phenolic blend paint, phenolic enamel paint, alkyd blend paint, ester glue blend paint, etc. It can also be used for phenolic antirust paint and phenolic primer.

[0041] Embodiment 2, the preparation of phenolic resin

[0042] Accurately weigh 100 parts of phenol residues, 80 parts of rosin, 70 parts of petroleum resin, 50 parts of water, 1 part of zinc acetate, and 1 part of ammonia water, add them to the reaction kettle, heat up, and when the system reaches 100 ° C, add 40 parts of formaldehyde dropwise; After dripping, keep it at this temperature for 5 hours to make it fully react; after detecting complete dissolution (detecting oil solubility and solubility, resin: linseed oil = 1: 4, fully dissolved; resin: toluene = 1: 1, fully dissolved; dissolve), add 30 parts of xylene, continue to heat up to 100°C, and dehydrate. After the removal, 100 parts of linseed oil and 50 parts of pentaerythritol were added to the reaction kettle in turn, and the temperature was raised to 240 ° C and kept for 2 hours, and then the alcohol solubility was detected. When the temperature reaches 200 °C, add 60 parts of phthalic anhydride, 3 parts of zinc acetate, and 0.1 part of silicone oil, continue to heat up, when the system reaches 230 °C, keep it for 2 hours, start sampling, measure the viscosity and acid value, when the system viscosity is 8-12s, solid Acid value ≤20mgKOH/g, cool down to below 200℃, use 200 # Solvent oil and heavy aromatics are diluted to a viscosity of 10-20s (Grignard tube 25°C), solid acid value ≤20mgKOH/g, solid content 70±2%, filtered and packaged to obtain phenolic resin to cool down. The measurement of each of the above-mentioned raw materials is in parts by weight.

[0043] After measurement, the performance indicators of phenolic resin are as follows:

[0044] The performance index of phenolic resin liquid is viscosity 10-20s (Grignard tube 25°C), solid acid value ≤20mgKOH/g, solid content 70±2%; directly brush the resin liquid (equivalent to making the corresponding novolac), Its workability is good, surface dry ≤ 5h, solid dry ≤ 15h, after drying to form a film, its flexibility is 1mm, tackiness ≤ grade 2, water resistance ≥ 48h, resistance to 120 # Solvent oil ≥48h. It can be used to prepare phenolic antirust paint, alkyd antirust paint, phenolic rust primer and other coatings.

[0045] Embodiment 3, the preparation of phenolic resin

[0046] Accurately weigh 100 parts of tert-butylphenol residue, 80 parts of rosin, 100 parts of coumarone resin, 50 parts of water, 1 part of copper sulfate, and 1 part of ammonia water, add it to the reaction kettle, heat up, when the system reaches 90 ℃, drop Add 60 parts of formaldehyde; after dripping, keep it at this temperature for 5 hours to make it fully react; after testing qualified (detect oil solubility and solubility, resin: linseed oil=1:4, fully soluble; resin: toluene=1 : 1, fully dissolved), add 40 parts of xylene, continue to heat up to 100°C, and dehydrate. After the removal, 150 parts of soybean oil and 50 parts of pentaerythritol were sequentially added to the reaction kettle, and the temperature was raised to 240° C. After holding for 2 hours, the alcohol solubility was detected. 200 °C, add 50 parts of phthalic anhydride, 10 parts of benzoic acid, 5 parts of maleic anhydride, 3 parts of copper sulfate, and 0.1 part of polyether, continue to heat up, when the system reaches 240 °C, keep it for 2 hours, start sampling, measure the viscosity and acid value, When the viscosity of the system is 8-12s, the solid acid value is ≤20mgKOH/g, cool down to below 200℃, use 200 # and 120 # Solvent oil is diluted to viscosity 10-20s (Grignard tube 25°C), solid acid value is ≤20mgKOH/g, solid content is 70±2%, filtered and packaged to obtain phenolic resin to cool down. The measurement of each of the above-mentioned raw materials is in parts by weight.

[0047] After measurement, the performance indicators of phenolic resin are as follows:

[0048] The performance index of phenolic resin liquid is viscosity 10-20s (Grignard tube 25°C), solid acid value ≤20mgKOH/g, solid content 70±2%; directly brush the resin liquid (equivalent to making the corresponding novolac), Its workability is good, surface dry ≤ 5h, solid dry ≤ 15h, after drying to form a film, its flexibility is 1mm, tackiness ≤ grade 2, water resistance ≥ 48h, resistance to 120 # Solvent oil ≥48h. It can be used to prepare phenolic antirust paint, alkyd antirust paint, phenolic rust primer and other coatings.