Low voc abrasion resistant coating and method of making same

Abstract

The application discloses a kind of low VOC wear-resistant coatings, the coating is prepared from the following substances and weight parts: water 10 parts by weight, propylene glycol 10-20 parts by weight, adipic acid-glycidyl terephthalate adduct 20-30 parts by weight, acrylate monomer 10-30 parts by weight, unsaturated carboxylic acid monomer 15-20 parts by weight, hydroxyl-containing acrylate monomer 10-20 parts by weight, epoxy-based organosiloxane 5-10 parts by weight, styrene 1-4 parts by weight, initiator 1-5 parts by weight.The coating of the application improves the hardness, wear resistance and chemical resistance of the coating, while reducing the water absorption and expansion coefficient of the coating.

Description

Technical Field

[0001] This disclosure relates to a low-VOC wear-resistant coating and its preparation method. Background Technology

[0002] Traditional coatings typically contain high concentrations of volatile organic compounds (VOCs), which are released into the atmosphere during application and drying, polluting air quality and the environment. Therefore, the development of low-VOC coatings is closely related to reducing negative environmental impacts and improving indoor air quality.

[0003] Meanwhile, government departments have implemented regulations and standards to limit VOC emissions in many areas to reduce the negative impact of coatings on the atmosphere. Therefore, coating manufacturers are subject to these regulations and need to develop and produce low-VOC coatings to meet these requirements.

[0004] In addition, low-VOC coatings also need to have good abrasion resistance and durability to meet the needs of various applications, including floors, walls, and furniture. Summary of the Invention

[0005] To address the aforementioned problems, this disclosure provides a low-VOC wear-resistant coating, which is prepared from the following substances and parts by weight:

[0006] 10 parts by weight of water, 10-20 parts by weight of propylene glycol, 20-30 parts by weight of adipic acid-tert-carbonyl glycidyl adduct, 10-30 parts by weight of acrylate monomer, 15-20 parts by weight of unsaturated carboxylic acid monomer, 10-20 parts by weight of hydroxyl-containing acrylate monomer, 5-10 parts by weight of epoxy organosiloxane, 1-4 parts by weight of styrene, and 1-5 parts by weight of initiator.

[0007] The preparation method of the adipic acid-tert-tert-carbon glycidyl ester adduct is as follows:

[0008] Under nitrogen protection, adipic acid and glycidyl tert-carbonate were added to the reactor, and the temperature was raised to 145-155℃ under stirring to carry out the ring-opening reaction. The reaction was maintained at 145-155℃ for 3-6 hours to obtain the adipic acid-glycidyl tert-carbonate adduct.

[0009] The acrylate monomer is selected from one or more of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl methacrylate.

[0010] The unsaturated carboxylic acid monomer is selected from one or more of acrylic acid, methacrylic acid, and maleic anhydride.

[0011] The hydroxy acrylate monomer is selected from one or more of ethyl hydroxyacrylate, butyl hydroxyacrylate, and trimethylolpropane triacrylate.

[0012] A method for preparing a low-VOC wear-resistant coating, the method comprising the following steps:

[0013] Add 10 parts by weight of water, 10-20 parts by weight of propylene glycol, and 20-30 parts by weight of adipic acid-tert-carbonyl glycidyl ester adduct to the reactor and heat to 80-90℃.

[0014] 10-30 parts by weight of acrylate monomer, 15-20 parts by weight of unsaturated carboxylic acid monomer, 10-20 parts by weight of hydroxyl-containing acrylate monomer, 5-10 parts by weight of epoxy organosiloxane, 1-4 parts by weight of styrene, and 1-5 parts by weight of initiator are added to a reactor. Under stirring conditions, the reaction temperature is maintained in the range of 140-150℃. After the addition is completed, the mixture in the reactor is kept at 140-150℃ for 1-3 hours to ensure that the reaction proceeds fully; finally, waterborne acrylic resin is obtained.

[0015] The preparation method of the adipic acid-tert-tert-carbonyl glycidyl ester adduct is as follows:

[0016] Under nitrogen protection, adipic acid and glycidyl tert-carbonate were added to the reactor, and the temperature was raised to 145-155℃ under stirring to carry out the ring-opening reaction. The reaction was maintained at 145-155℃ for 3-6 hours to obtain the adipic acid-glycidyl tert-carbonate adduct.

[0017] The acrylate monomer is selected from one or more of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl methacrylate.

[0018] The unsaturated carboxylic acid monomer is selected from one or more of acrylic acid, methacrylic acid, and maleic anhydride.

[0019] The hydroxy acrylate monomer is selected from one or more of ethyl hydroxyacrylate, butyl hydroxyacrylate, and trimethylolpropane triacrylate.

[0020] In this invention, the epoxy-based organosiloxane in the coating reacts with the carboxyl groups in the acrylic resin to form a cross-linked structure. This cross-linked structure improves the coating's hardness, abrasion resistance, and chemical resistance, while reducing its water absorption and coefficient of expansion. The epoxy-based organosiloxane exhibits excellent abrasion resistance and weather resistance, forming a tough siloxane network structure in the coating, effectively improving its abrasion resistance. Simultaneously, raw materials such as styrene in the coating also contribute to improving the coating's hardness and abrasion resistance.

[0021] The above and other features, aspects and advantages of this application will be more easily understood by referring to the following detailed description. Detailed Implementation Plan

[0022] This invention provides a low-VOC wear-resistant coating, which is prepared from the following substances and parts by weight:

[0023] The ingredients are: 10 parts by weight of water, 10-20 parts by weight of propylene glycol, 20-30 parts by weight of adipic acid-tert-tert-carbonyl glycidyl adduct, 10-30 parts by weight of acrylate monomer, 15-20 parts by weight of unsaturated carboxylic acid monomer, 10-20 parts by weight of hydroxyl-containing acrylate monomer, 5-10 parts by weight of epoxy-based organosiloxane, 1-4 parts by weight of styrene, and 1-5 parts by weight of initiator. This invention utilizes a relatively large amount of epoxy-based organosiloxane, ensuring the reaction proceeds and exhibiting excellent wear resistance.

[0024] As a preferred embodiment, the preparation method of the adipic acid-tert-carbonyl glycidyl ester adduct is as follows:

[0025] Under nitrogen protection, adipic acid and glycidyl tert-carbonate were added to the reactor, and the temperature was raised to 145-155℃ under stirring to carry out the ring-opening reaction. The reaction was maintained at 145-155℃ for 3-6 hours to obtain the adipic acid-glycidyl tert-carbonate adduct.

[0026] In a preferred embodiment, the acrylate monomer is selected from one or more of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl methacrylate.

[0027] In a preferred embodiment, the unsaturated carboxylic acid monomer is selected from one or more of acrylic acid, methacrylic acid, and maleic anhydride.

[0028] In a preferred embodiment, the hydroxy acrylate monomer is selected from one or more of ethyl hydroxyacrylate, butyl hydroxyacrylate, and trimethylolpropane triacrylate.

[0029] As a preferred embodiment, a method for preparing a low-VOC wear-resistant coating includes the following steps:

[0030] 10 parts by weight of water, 10-20 parts by weight of propylene glycol, and 20-30 parts by weight of adipic acid-tert-carbonyl glycidyl ester adduct were added to the reaction vessel and the temperature was raised to 80-90℃. The use of 10 parts by weight of water and 10-20 parts by weight of propylene glycol ensured the reaction proceeded and reduced the use of volatile solvents.

[0031] 10-30 parts by weight of acrylate monomer, 15-20 parts by weight of unsaturated carboxylic acid monomer, 10-20 parts by weight of hydroxyl-containing acrylate monomer, 5-10 parts by weight of epoxy organosiloxane, 1-4 parts by weight of styrene, and 1-5 parts by weight of initiator are added to a reactor. Under stirring conditions, the reaction temperature is maintained in the range of 140-150℃. After the addition is completed, the mixture in the reactor is kept at 140-150℃ for 1-3 hours to ensure that the reaction proceeds fully; finally, waterborne acrylic resin is obtained.

[0032] The preparation method of the adipic acid-tert-tert-carbonyl glycidyl ester adduct is as follows:

[0033] Under nitrogen protection, adipic acid and glycidyl tert-carbonate were added to the reactor, and the temperature was raised to 145-155℃ under stirring to carry out the ring-opening reaction. The reaction was maintained at 145-155℃ for 3-6 hours to obtain the adipic acid-glycidyl tert-carbonate adduct.

[0034] In a preferred embodiment, the acrylate monomer is selected from one or more of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl methacrylate.

[0035] In a preferred embodiment, the unsaturated carboxylic acid monomer is selected from one or more of acrylic acid, methacrylic acid, and maleic anhydride.

[0036] In a preferred embodiment, the hydroxy acrylate monomer is selected from one or more of ethyl hydroxyacrylate, butyl hydroxyacrylate, and trimethylolpropane triacrylate.

[0037] The specific experiment is as follows:

[0038] Source of materials:

[0039] The compounds involved in the embodiments of this invention are all obtained through commercial purchase.

[0040] Example 1

[0041] Add 10 parts by weight of water, 10 parts by weight of propylene glycol, and 20 parts by weight of adipic acid-tert-carbonyl glycidyl ester adduct to the reactor and heat to 80-90℃.

[0042] 20 parts by weight of acrylate monomer, 20 parts by weight of unsaturated carboxylic acid monomer, 10 parts by weight of hydroxyl-containing acrylate monomer, 8 parts by weight of epoxy organosiloxane, 4 parts by weight of styrene, and 3 parts by weight of initiator are added to a reactor. Under stirring conditions, the reaction temperature is maintained in the range of 140-150℃. After the addition is completed, the mixture in the reactor is kept at 140-150℃ for 1-3 hours to ensure that the reaction proceeds fully; finally, waterborne acrylic resin is obtained.

[0043] The preparation method of the adipic acid-tert-tert-carbonyl glycidyl ester adduct is as follows:

[0044] Under nitrogen protection, 1.1 mol of adipic acid and 2 mol of glycidyl tert-carbonate were added to the reactor. The temperature was raised to 145-155℃ under stirring to carry out the ring-opening reaction. The reaction was maintained at 145-155℃ for 3-6 hours to obtain the adipic acid-glycidyl tert-carbonate adduct.

[0045] Example 2

[0046] Add 10 parts by weight of water, 15 parts by weight of propylene glycol, and 30 parts by weight of adipic acid-tert-carbonyl glycidyl ester adduct to the reactor and heat to 80-90℃.

[0047] 20 parts by weight of acrylate monomer, 15 parts by weight of unsaturated carboxylic acid monomer, 10 parts by weight of hydroxyl-containing acrylate monomer, 8 parts by weight of epoxy organosiloxane, 3 parts by weight of styrene, and 3 parts by weight of initiator are added to a reactor. Under stirring conditions, the reaction temperature is maintained in the range of 140-150℃. After the addition is completed, the mixture in the reactor is kept at 140-150℃ for 1-3 hours to ensure that the reaction proceeds fully; finally, waterborne acrylic resin is obtained.

[0048] The preparation method of the adipic acid-tert-tert-carbonyl glycidyl ester adduct is as follows:

[0049] Under nitrogen protection, 1.1 mol of adipic acid and 2 mol of glycidyl tert-carbonate were added to the reactor. The temperature was raised to 145-155℃ under stirring to carry out the ring-opening reaction. The reaction was maintained at 145-155℃ for 3-6 hours to obtain the adipic acid-glycidyl tert-carbonate adduct.

[0050] Example 3

[0051] Add 10 parts by weight of water, 10 parts by weight of propylene glycol, and 20 parts by weight of adipic acid-tert-carbonyl glycidyl ester adduct to the reactor and heat to 80-90℃.

[0052] 20 parts by weight of acrylate monomer, 20 parts by weight of unsaturated carboxylic acid monomer, 10 parts by weight of hydroxyl-containing acrylate monomer, 9 parts by weight of epoxy organosiloxane, 3 parts by weight of styrene, and 3 parts by weight of initiator are added to a reactor. Under stirring conditions, the reaction temperature is maintained in the range of 140-150℃. After the addition is completed, the mixture in the reactor is kept at 140-150℃ for 1-3 hours to ensure that the reaction proceeds fully; finally, waterborne acrylic resin is obtained.

[0053] The preparation method of the adipic acid-tert-tert-carbonyl glycidyl ester adduct is as follows:

[0054] Under nitrogen protection, 1.1 mol of adipic acid and 2 mol of glycidyl tert-carbonate were added to the reactor. The temperature was raised to 145-155℃ under stirring to carry out the ring-opening reaction. The reaction was maintained at 145-155℃ for 3-6 hours to obtain the adipic acid-glycidyl tert-carbonate adduct.

[0055] Abrasion resistance was determined according to GB / T1768-79(89). The waterborne acrylic resins of Examples 1-3 did not show the substrate after 200 cycles. Similar to Example 1, 4 parts by weight of epoxy-based organosiloxane were used; less than 5 parts by weight resulted in substrate exposure after 110 cycles, indicating poor abrasion resistance. Without epoxy-based organosiloxane, substrate exposure occurred after only 80 cycles.

[0056] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a low-VOC wear-resistant coating, characterized in that, The preparation method includes the following steps: Add 10 parts by weight of water, 10-20 parts by weight of propylene glycol, and 20-30 parts by weight of adipic acid-tert-carbonyl glycidyl ester adduct to the reactor and heat to 80-90℃. 10-30 parts by weight of acrylate monomer, 15-20 parts by weight of unsaturated carboxylic acid monomer, 10-20 parts by weight of hydroxyl-containing acrylate monomer, 8-10 parts by weight of epoxy organosiloxane, 1-4 parts by weight of styrene, and 1-5 parts by weight of initiator are added to a reactor. Under stirring conditions, the reaction temperature is maintained in the range of 140-150℃. After the addition is completed, the mixture in the reactor is kept at 140-150℃ for 1-3 hours to ensure that the reaction is fully carried out, and finally waterborne acrylic resin, namely the low VOC wear-resistant coating, is obtained. The acrylate monomer is selected from one or more of methyl acrylate, ethyl acrylate, butyl acrylate, methyl methacrylate, ethyl methacrylate, and butyl methacrylate; The unsaturated carboxylic acid monomer is selected from one or more of acrylic acid, methacrylic acid, and maleic anhydride; The hydroxy acrylate monomer is selected from one or more of ethyl hydroxyacrylate, butyl hydroxyacrylate, and trimethylolpropane triacrylate; The preparation method of the adipic acid-tert-tert-carbonyl glycidyl ester adduct is as follows: Under nitrogen protection, 1.1 mol of adipic acid and 2 mol of glycidyl tert-carbonate were added to the reactor. The temperature was raised to 145-155℃ under stirring to carry out the ring-opening reaction. The reaction was maintained at 145-155℃ for 3-6 hours to obtain the adipic acid-glycidyl tert-carbonate adduct.