Solid acrylic resin and preparation method thereof
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A technology of solid acrylic acid and acrylate, applied in the field of coatings, can solve the problems of solvent recovery, large amount of solvent used, unfriendly product smell, etc., and achieve the effect of simple process, excellent water dispersibility and excellent weather resistance
Active Publication Date: 2017-11-24
湖南天氟新材料有限公司
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However, this method uses mercapto acids as the chain transfer agent, and the resulting product has an unfriendly smell, and the amount of solvent used in the production process is large, and there are problems such as solvent recovery.
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Embodiment 1
[0033] Add 47.5g of vinyl tert-carbonate into the reactor, stir and raise the temperature to 150-180°C, start to drop 24g of acrylic acid, 12g of hydroxyethyl acrylate, 30g of styrene, 20g of butyl acrylate, 15g of methyl methacrylate and 5g of di For the mixture of tert-amyl peroxide, control the rate of addition uniformly, drop the mixture within 4-6 hours, keep warm for 1 hour after dropping, add 1 g of di-tert-amyl peroxide, continue to keep warm for 2-3 hours, and cool down to 80°C , out of the pot to get light yellow transparent resin. After testing, the corresponding parameter indexes of this embodiment 1 are shown in Table 1.
Embodiment 2
[0035] Add 47.5g of tertiary vinyl carbonate into the reactor, stir and heat up to 150-180°C, start to dropwise add 18g of acrylic acid, 12g of hydroxyethyl acrylate, 51g of styrene, 20g of butyl acrylate and 10g of di-tert-amyl peroxide Mixture, control the dropping speed evenly, finish dropping the mixture within 4-6 hours, keep warm for 1 hour after dropping, add 1g of di-tert-amyl peroxide, keep warm for 2-3 hours, cool down to 80°C, light yellow and transparent when out of the pot resin. After testing, the corresponding parameter indexes of this embodiment 2 are shown in Table 1.
Embodiment 3
[0037] Add 47.5g of tertiary vinyl carbonate into the reactor, stir and raise the temperature to 150-180°C, start to drop 18g of acrylic acid, 12g of hydroxyethyl acrylate, 20g of butyl acrylate, 51g of methyl methacrylate and 10g of di-tert-amyl peroxide Mixture of oxides, control the rate of addition uniformly, drop the mixture within 4-6 hours, keep warm for 1 hour after dropping, add 1g of di-tert-amyl peroxide, continue to keep warm for 2-3 hours, cool down to 80°C, and get out of the pot Dark yellow transparent resin. After testing, the corresponding parameter indexes of this embodiment 3 are shown in Table 1.
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Abstract
The invention provides a solid acrylic resin and a preparation method thereof, which is composed of the following raw materials in weight percentage: 25-40% of internal plasticizing monomers; 0-35% of acrylate monomers; 10-15% of carboxyl group-containing monomers 6-9% of hydroxyl-containing monomers; 0-35% of vinyl monomers; 3-7% of initiators. The present invention also includes the following steps: (1) putting the internal plasticizing monomer into the reactor, and raising the temperature to 160-180° C.; (2) adding the acrylate monomer, carboxyl-containing monomer, and hydroxyl-containing monomer The mixed monomer composed of monomer and vinyl monomer is dropped within 3 to 10 hours and kept for 1 hour; (3) the remaining initiator is added and kept for 2 to 3 hours; (4) the temperature is lowered to 80°C and discharged, and cooled to obtain Solid acrylic resin. Compared with related technologies, the beneficial effect of the present invention lies in that the present invention relates to the use of reactive monomers for internal plasticization, reduces the viscosity of the resin at the polymerization temperature, and prepares a solvent-free high-performance solid resin at normal pressure, medium and low temperature.
Description
【Technical field】 [0001] The invention relates to the technical field of coatings, in particular to a solid acrylic resin and a preparation method thereof. 【Background technique】 [0002] Compared with solvent-based, emulsion-based, and solvent-to-water-based acrylic resins, solid acrylic resins have unique performance advantages, and are safer and more economical in storage, transportation and use. They are widely used in coatings, printing inks, and packaging industries. At present, domestic solid acrylic resins are mostly prepared by recovery of solvent after suspension polymerization or solvent polymerization. Suspension polymerization is easy to dissipate heat, and the production can be operated intermittently, but some additives are left in the product, the purification process is complicated, and the polymerization reaction is not easy to control, and the production control requirements are strict; a large amount of waste water is generated during the later resin clea...
Claims
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