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CN-116284592-B - Triphenyl phosphite modified water-based alkyd resin, and preparation method and application thereof

CN116284592BCN 116284592 BCN116284592 BCN 116284592BCN-116284592-B

Abstract

The invention relates to the technical field of water-based acrylic acid modified alkyd resin, in particular to the field of IPC C08F283, and further relates to triphenyl phosphite modified water-based alkyd resin and a preparation method thereof. The raw materials comprise, by mass, 20-30 parts of fatty acid, 10-20 parts of polyol, 12-20 parts of dibasic acid, 2-6 parts of benzoic acid, 0.02-0.08 part of catalyst, 0.05-0.15 part of triphenyl phosphite, 1.5-4.0 parts of dimethylbenzene, 18-25 parts of cosolvent, 2-5 parts of acrylic monomer, 0-15 parts of acrylic monomer, 0.3-1.0 part of initiator and 3-6 parts of neutralizer. The invention adopts triphenyl phosphite as an antioxidant, reduces the color number of the resin, improves the water resistance of the resin to a certain extent, improves the catalytic efficiency of the catalyst and shortens the synthesis time.

Inventors

  • FENG PENGCHENG
  • LEI MUSHENG
  • YOU RENGUO

Assignees

  • 湖北双键精细化工有限公司

Dates

Publication Date
20260505
Application Date
20230222

Claims (7)

  1. 1. The triphenyl phosphite modified water-based alkyd resin is characterized by comprising, by mass, 20-30 parts of fatty acid, 10-20 parts of polyol, 12-20 parts of dibasic acid, 2-6 parts of benzoic acid, 0.02-0.08 part of catalyst, 0.05-0.15 part of triphenyl phosphite, 1.5-4.0 parts of dimethylbenzene, 18-25 parts of cosolvent, 2-5 parts of acrylic monomer, 0-15 parts of acrylic monomer, 0.3-1.0 part of initiator, 3-6 parts of neutralizer and 0-15 parts of styrene; The catalyst is selected from one or a combination of a plurality of dibutyl tin oxide, monobutyl tin oxide, zinc oxide and tetrabutyl titanate; the polyol is a combination of pentaerythritol and trimethylolpropane, and the mass ratio is (0.4-18): 1; the mass ratio of the dibasic acid to the benzoic acid is (3-6) 1; The preparation method of the triphenyl phosphite modified water-based alkyd resin comprises the following steps: (1) Adding fatty acid, polyalcohol, dibasic acid, benzoic acid, catalyst, triphenyl phosphite and dimethylbenzene into a reaction container, starting heating and stirring, heating to 160-170 ℃ firstly, then slowly heating to 220-240 ℃ at constant speed within 2-4 h, carrying out heat preservation esterification, reacting until the acid value is less than 10mgKOH/g, cooling to below 200 ℃, and vacuumizing to remove dimethylbenzene; (2) Cooling to a temperature below the boiling point of the cosolvent, adding 75-85wt% of the cosolvent to fully dissolve and dilute, and then keeping the temperature at 110-150 ℃; (3) Uniformly mixing an acrylic monomer, styrene, an initiator I and 11-13wt% of cosolvent to form a mixed solution, and dropwise adding the mixed solution at a uniform speed within 2-4 hours, dropwise adding the mixed solution of the residual cosolvent and the initiator II within 0.4-0.6 hours, and continuously preserving heat for 2-3 hours; (4) And cooling, adding a neutralizing agent, and dispersing and stirring at a high speed for 20-40 min to obtain the triphenyl phosphite modified water-based alkyd resin.
  2. 2. A triphenyl phosphite modified waterborne alkyd according to claim 1, wherein the fatty acid is selected from one or more of the group consisting of oleic acid, tall oil acid, and dehydrated ricinoleic acid.
  3. 3. The triphenyl phosphite modified waterborne alkyd resin of claim 1, wherein the diacid is selected from the group consisting of phthalic anhydride, maleic anhydride, isophthalic acid, and terephthalic acid.
  4. 4. The triphenyl phosphite modified waterborne alkyd resin according to claim 1, wherein the initiator comprises 0.2-0.5 part by mass of initiator I and 0.1-0.5 part by mass of initiator II.
  5. 5. The triphenyl phosphite modified waterborne alkyd resin according to claim 4, wherein the initiator I is one or more selected from benzoyl peroxide, tert-butyl peroxy-2-ethylhexanoate, tert-butyl peroxybenzoate, di-tert-butyl peroxide and di-tert-amyl peroxide, and the initiator II is one or more selected from tert-butyl peroxybenzoate, di-tert-butyl peroxide and di-tert-amyl peroxide.
  6. 6. A method of preparing a triphenyl phosphite modified waterborne alkyd resin according to claim 5, comprising the steps of: (1) Adding fatty acid, polyalcohol, dibasic acid, benzoic acid, catalyst, triphenyl phosphite and dimethylbenzene into a reaction container, starting heating and stirring, heating to 160-170 ℃ firstly, then slowly heating to 220-240 ℃ at constant speed within 2-4 h, carrying out heat preservation esterification, reacting until the acid value is less than 10mgKOH/g, cooling to below 200 ℃, and vacuumizing to remove dimethylbenzene; (2) Cooling to a temperature below the boiling point of the cosolvent, adding 75-85wt% of the cosolvent to fully dissolve and dilute, and then keeping the temperature at 110-150 ℃; (3) Uniformly mixing an acrylic monomer, styrene, an initiator I and 11-13wt% of cosolvent to form a mixed solution, and dropwise adding the mixed solution at a uniform speed within 2-4 hours, dropwise adding the mixed solution of the residual cosolvent and the initiator II within 0.4-0.6 hours, and continuously preserving heat for 2-3 hours; (4) And cooling, adding a neutralizing agent, and dispersing and stirring at a high speed for 20-40 min to obtain the triphenyl phosphite modified water-based alkyd resin.
  7. 7. Use of the triphenyl phosphite modified waterborne alkyd resin according to any of claims 1-5, for preparing a coating.

Description

Triphenyl phosphite modified water-based alkyd resin, and preparation method and application thereof Technical Field The invention relates to the technical field of water-based acrylic acid modified alkyd resin, in particular to the field of IPC C08F283, and further relates to triphenyl phosphite modified water-based alkyd resin, and a preparation method and application thereof. Background Currently, waterborne coatings are getting higher due to the low VOC (volatile organic compounds) status throughout the coating field. Among them, the aqueous alkyd resin has been paid attention to because of its variety, wide use, good performance, low price and unique advantages. However, the coatings prepared from waterborne alkyd resins have slow drying rates, low hardness, and poor water resistance. The aqueous alkyd resin is modified by the acrylic resin, and the prepared coating has the characteristics of acrylic acid and alkyd resin, and the coating performance, particularly the dryness, the hardness, the water resistance and the gloss and color retention are greatly improved. Chinese patent CN 110655617A discloses a preparation method of self-drying electric shock resistant acrylic acid modified water-based alkyd resin for electric appliances, which comprises the following steps of putting soybean oil, pentaerythritol and hypophosphorous acid into a reaction kettle, heating to 220 ℃, adding lithium hydroxide, heating to 245-250 ℃ for alcoholysis reaction, sampling after 1.5 hours, taking a sample of methanol=1:2, observing transparency, cooling if transparent, keeping the reaction if opaque, and sampling for half an hour until transparent. However, since the esterification reaction temperature in the synthesis process of the acrylic acid modified water-based alkyd resin is up to 220-240 ℃, the oleic acid can be subjected to oxidative discoloration in the process, so that the final color number of the water-based alkyd resin is deepened. However, hypophosphorous acid is decomposed into orthophosphoric acid and phosphine at a temperature of more than 130 ℃, the phosphine is a highly toxic gas, and has a certain potential safety hazard to operators, the hypophosphorous acid is relatively hydrophilic, so that the water resistance of a coating prepared from the aqueous alkyd resin is influenced, in addition, when the aqueous alkyd resin system contains a metal oxide catalyst, a part of metal oxide is consumed by the hypophosphorous acid, the catalytic activity is reduced, and the synthetic reaction time of the aqueous alkyd resin is longer. In order to solve the technical problems, the invention adopts triphenyl phosphite to modify the water-based alkyd resin, which not only can reduce the color number of the modified water-based alkyd resin, but also can avoid side reaction, shorten the synthesis time of the modified water-based alkyd resin, improve the water resistance of the water-based alkyd resin, and can not influence the health of operators. Disclosure of Invention The invention provides triphenyl phosphite modified water-based alkyd resin, which comprises, by mass, 20-30 parts of fatty acid, 10-20 parts of polyol, 12-20 parts of dibasic acid, 2-6 parts of benzoic acid, 0.02-0.08 part of catalyst, 0.05-0.15 part of triphenyl phosphite, 1.5-4.0 parts of dimethylbenzene, 18-25 parts of cosolvent, 2-5 parts of acrylic monomer, 0-15 parts of acrylic monomer, 0.3-1.0 part of initiator and 3-6 parts of neutralizer. In some preferred embodiments, the triphenyl phosphite modified waterborne alkyd resin comprises, by mass, 25-30 parts of fatty acid, 10-15 parts of polyol, 12-15 parts of dibasic acid, 2-4 parts of benzoic acid, 0.04-0.06 part of catalyst, 0.09-0.15 part of triphenyl phosphite, 2.0-4.0 parts of xylene, 18-20 parts of cosolvent, 2-3 parts of acrylic monomer, 0-12 parts of acrylic monomer, 0.3-0.5 part of initiator and 3-4 parts of neutralizer. In some preferred embodiments, the raw materials further comprise 0-15 parts of styrene. Preferably, the raw materials further comprise 0-12 parts of styrene. In some preferred embodiments, the mass ratio of the acrylic monomer to the styrene is (0.7-1.5): 1. In some preferred embodiments, the fatty acid is selected from one or more of the group consisting of oleic acid, tall oil acid, dehydrated ricinoleic acid. Preferably, the fatty acid is selected from the group consisting of a combination of soy oleic acid and dehydrated ricinoleic acid or a combination of tall oil acid and dehydrated ricinoleic acid. Preferably, the mass ratio of the soybean oleic acid to the dehydrated ricinoleic acid is (4-13): 1. Further preferably, the mass ratio of the soybean oleic acid to the dehydrated ricinoleic acid is (10 to 13): 1. Preferably, the mass ratio of the tall oil acid to the dehydrated ricinoleic acid is (4-13): 1. Further preferably, the mass ratio of the tall oil acid to the dehydrated ricinoleic acid is (4 to 7): 1. In some preferred embodiments, the polyol is selected