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CN-121975465-A - Flexible folding-resistant polyester emulsion special for household square carpet and preparation method thereof

CN121975465ACN 121975465 ACN121975465 ACN 121975465ACN-121975465-A

Abstract

The invention discloses a flexible folding-resistant polyester emulsion special for a household carpet tile and a preparation method thereof, and relates to the field of emulsion special for household carpet tile. According to the flexible folding-resistant polyester emulsion special for the household carpet tile and the preparation method thereof, the tributyl itaconate, the glycidyl methacrylate and the N-methylolacrylamide ternary composite modified monomer are adopted, wherein the long-chain alkyl of the dibutyl itaconate can improve the flexibility of the emulsion after film formation, the epoxy group of the glycidyl methacrylate can carry out a crosslinking reaction with the hydroxyl on the surface of a substrate to improve the adhesive force, the N-methylolacrylamide can enhance the crosslinking density of the emulsion, the synergistic effect of the dibutyl itaconate, the glycidyl methacrylate and the N-methylolacrylamide can obviously improve the flexible folding-resistant performance of the polyester emulsion, and the technical scheme of the polyester emulsion is obviously different from that of the existing single modified monomer.

Inventors

  • CUI SHASHA
  • LV SHUKUI
  • LIU JINMING
  • LI JING

Assignees

  • 河北昊泽化工有限公司

Dates

Publication Date
20260505
Application Date
20260318

Claims (7)

  1. 1. The flexible folding-resistant polyester emulsion special for the household square blanket comprises dihydric alcohol, dibasic acid, a modified monomer, a chain extender, an emulsifier, an initiator, a neutralizer, deionized water, a film forming auxiliary agent and an antifreeze agent, and is characterized in that the dihydric alcohol comprises, by mass, 28-32 parts of poly (1, 4-butylene glycol) glycol, 10-12 parts of polypropylene glycol with the molecular weight of 1000 and 5-6 parts of 2, 2-dimethylolpropionic acid; the dibasic acid comprises 15-18 parts of dimethyl terephthalate and 6-8 parts of adipic acid in parts by mass; The modified monomer comprises, by mass, 5-6 parts of dibutyl itaconate, 3-4 parts of glycidyl methacrylate and 2-2.5 parts of N-methylolacrylamide; the emulsifier comprises 2.5-3 parts by weight of isooctylphenol polyoxyethylene ether and 1-1.5 parts by weight of sodium dodecyl benzene sulfonate; comprises 3.5 to 4 parts of chain extender, 0.7 to 0.8 part of initiator, 4 to 4.5 parts of neutralizer, 85 to 90 parts of deionized water, 2.5 to 3 parts of film forming auxiliary agent and 2 to 2.5 parts of antifreeze agent.
  2. 2. The flexible folding-resistant polyester emulsion special for household carpet tiles, which is characterized in that the chain extender is 1, 4-butanediol, the initiator is ammonium persulfate, the neutralizer is triethylamine, the film-forming auxiliary agent is propylene glycol methyl ether acetate, and the antifreeze agent is ethylene glycol.
  3. 3. The flexible folding-resistant polyester emulsion special for home carpet as claimed in claim 1, wherein the polyester emulsion comprises the following components in parts by weight: 28 parts of dihydric alcohol, 12 parts of polypropylene glycol, 5 parts of 2, 2-dimethylolpropionic acid, 15 parts of dimethyl terephthalate and 8 parts of adipic acid, 3 parts of modified monomer, 6 parts of dibutyl itaconate, 3 parts of glycidyl methacrylate and 2 parts of N-methylolacrylamide, 4 parts of chain extender, 2.5 parts of isooctylphenol polyoxyethylene ether, 1.5 parts of sodium dodecyl benzene sulfonate, 0.8 part of initiator, 4 parts of neutralizing agent, 85 parts of deionized water, 3 parts of film forming aid, 3 parts of propylene methyl ether acetate and 2 parts of antifreeze agent, wherein the antifreeze agent is ethylene glycol.
  4. 4. The flexible folding-resistant polyester emulsion special for home carpet as claimed in claim 1, wherein the polyester emulsion comprises the following components in parts by weight: 32 parts of polyadipic acid-1, 4-butanediol glycol, 10 parts of polypropylene glycol, 6 parts of 2, 2-dimethylolpropionic acid, 18 parts of dimethyl terephthalate and 6 parts of adipic acid, 4 parts of modified monomer, 2.5 parts of dibutyl itaconate, 4 parts of glycidyl methacrylate, 2.5 parts of N-methylolacrylamide, 3.5 parts of chain extender, 3 parts of emulsifier, 1 part of sodium dodecyl benzene sulfonate, 0.7 part of initiator, 4.5 parts of neutralizing agent, 90 parts of deionized water, 2.5 parts of film forming additive, 2.5 parts of propylene methyl ether acetate and 2.5 parts of antifreeze agent.
  5. 5. A method for preparing a flexible folding-resistant polyester emulsion special for a home carpet, which is characterized in that the flexible folding-resistant polyester emulsion special for the home carpet is adopted according to any one of the claims 1-4, and is characterized in that: the method specifically comprises the following operation steps: S1, preparing a polyester prepolymer, namely adding poly (1, 4-butanediol adipate) glycol, polypropylene glycol and 2, 2-dimethylolpropionic acid into a reaction kettle, heating to 110-115 ℃, adding dimethyl terephthalate and adipic acid, heating to 180-185 ℃ for reacting for 2.5-3 hours, continuously stirring during the period, keeping the stirring speed at 120-130r/min, heating to 220-225 ℃, keeping the vacuum degree at-0.095 MPa to-0.09 MPa, continuously reacting for 3.2-4 hours, obtaining the polyester prepolymer, sampling and detecting the acid value of the prepolymer, controlling the acid value to be less than or equal to 5mgKOH/g, and if the acid value does not reach the standard, prolonging the reaction for 30 minutes; S2, chain extension of the modified prepolymer, namely cooling the polyester prepolymer obtained in the step S1 to 160-165 ℃, adding a chain extender 1, 4-butanediol, stirring and reacting for 1.2-1.5 hours, and keeping the stirring speed at 120-130r/min; S3, preparing a pre-emulsion system, namely adding deionized water, isooctylphenol polyoxyethylene ether and sodium dodecyl benzene sulfonate into a container, heating to 60-65 ℃, stirring and dissolving for 25-30 minutes at a stirring rate of 150-160r/min, then adding N-methylolacrylamide, and continuing stirring for 15-20 minutes to obtain uniform pre-emulsion; S4, carrying out composite emulsification and segmented polymerization, namely cooling the modified prepolymer obtained in the step S2 to 90-95 ℃, adding triethylamine, stirring and neutralizing for 25-30 minutes, controlling the neutralization degree to 95% -100%, then slowly adding the first part of pre-emulsion prepared in the step S3, stirring while adding, increasing the stirring speed to 200-220r/min, emulsifying for 25-30 minutes to obtain a primary emulsion, cooling the primary emulsion to 65-68 ℃, adding 1/3 of the initiator ammonium persulfate, stirring and reacting for 1-1.2 hours, keeping the temperature at 65-68+/-2 ℃, then heating to 75-78 ℃, slowly dropwise adding the rest initiator and the second part of pre-emulsion, keeping the dropwise adding speed to 1.2-1.5mL/min, keeping the temperature and reacting for 1.8-2 hours at 75-78+/-2 ℃, finally heating to 85-88 ℃, and keeping the temperature and curing for 45-60 minutes; S5, carrying out post-treatment to obtain a finished product, cooling the polymerization product obtained in the step S4 to 45-48 ℃, adding a film forming additive propylene glycol methyl ether acetate and an antifreeze agent ethylene glycol, stirring and mixing for 25-30 minutes, wherein the stirring speed is 120-130r/min, filtering by a 200-mesh filter screen to remove impurities and unreacted tiny particles, detecting the solid content of the emulsion after the filtering is finished, controlling the solid content to 38-42%, adding deionized water to adjust if the solid content is too high, and concentrating in vacuum at 45-48 ℃ until reaching the standard if the solid content is too low, thus finally obtaining the flexible folding-resistant polyester emulsion special for the household square blanket.
  6. 6. The preparation method of the flexible folding-resistant polyester emulsion special for the home carpet as claimed in claim 5, wherein in the step S1, after the temperature is raised to 110-115 ℃, vacuum dehydration is started for 1.2-1.5 hours, and the vacuum degree is controlled at-0.09 MPa to-0.08 MPa.
  7. 7. The preparation method of the flexible folding-resistant polyester emulsion special for the home carpet as claimed in claim 5, wherein in the step S2, the hydroxyl value of the modified prepolymer is detected, the hydroxyl value is controlled to be 45-55 mgKOH/g, and the hydroxyl value is adjusted by adding the chain extender and the modified monomer if the hydroxyl value is unqualified.

Description

Flexible folding-resistant polyester emulsion special for household square carpet and preparation method thereof Technical Field The invention relates to the field of special emulsion for household carpet tiles, in particular to a special flexible folding-resistant polyester emulsion for household carpet tiles and a preparation method thereof. Background The square blanket is used as a common household decoration article, has the advantages of convenient laying, various styles and the like, and is widely applied to families, office places and the like. During the production of the carpet tile, the polyester emulsion is used as an important adhesive, and the properties of the polyester emulsion directly affect the quality of the carpet tile, such as adhesion, water resistance, flexibility, wear resistance and the like. Currently, the global carpet backing market has formed a pattern of coexistence of multiple material systems. The novel polyester emulsion mainly comprises three technical routes, namely traditional emulsion type back adhesive represented by styrene-butadiene latex still occupies a main market share, PVC, EVA and the like are used as back adhesive materials, growth is rapid, and the novel polyester emulsion combines environmental protection and performance. The technical diversity reflects continuous efforts made by the industry for balancing performance, cost and environmental protection requirements, and simultaneously lays a foundation for the technical breakthrough of the next stage. After the 21 st century, the improvement of environmental awareness promotes the transformation of the back glue technology to the green direction. The traditional styrene-butadiene latex gradually exposes the problems of Volatile Organic Compound (VOC) emission, formaldehyde release, difficult recovery and the like in the production and use processes. The material has low VOC characteristics and environmental friendliness, but the product faces technical bottlenecks of unstable bonding performance, high moisture absorption rate, poor water resistance and the like. Therefore, it is necessary to provide a flexible and folding-resistant polyester emulsion special for home carpet tiles and a preparation method thereof to solve the above problems. Disclosure of Invention The invention mainly aims to provide a flexible folding-resistant polyester emulsion special for a home carpet tile and a preparation method thereof, which can effectively solve the problems in the background technology. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: A special flexible folding-resistant polyester emulsion for a household square blanket and a preparation method thereof comprise dihydric alcohol, dibasic acid, a modified monomer, a chain extender, an emulsifier, an initiator, a neutralizer, deionized water, a film forming auxiliary agent and an antifreeze agent, wherein the dihydric alcohol comprises, by mass, 28-32 parts of poly (1, 4-butylene glycol), 10-12 parts of polypropylene glycol with a molecular weight of 1000 and 5-6 parts of 2, 2-dimethylolpropionic acid; the dibasic acid comprises 15-18 parts of dimethyl terephthalate and 6-8 parts of adipic acid in parts by mass; The modified monomer comprises, by mass, 5-6 parts of dibutyl itaconate, 3-4 parts of glycidyl methacrylate and 2-2.5 parts of N-methylolacrylamide; the emulsifier comprises 2.5-3 parts by weight of isooctylphenol polyoxyethylene ether and 1-1.5 parts by weight of sodium dodecyl benzene sulfonate; comprises 3.5 to 4 parts of chain extender, 0.7 to 0.8 part of initiator, 4 to 4.5 parts of neutralizer, 85 to 90 parts of deionized water, 2.5 to 3 parts of film forming auxiliary agent and 2 to 2.5 parts of antifreeze agent. Preferably, the chain extender is 1, 4-butanediol, the initiator is ammonium persulfate, the neutralizer is triethylamine, the film-forming auxiliary agent is propylene glycol methyl ether acetate, and the antifreeze agent is ethylene glycol. Preferably, the method comprises the following steps of: 28 parts of dihydric alcohol, 12 parts of polypropylene glycol, 5 parts of 2, 2-dimethylolpropionic acid, 15 parts of dimethyl terephthalate and 8 parts of adipic acid, 3 parts of modified monomer, 6 parts of dibutyl itaconate, 3 parts of glycidyl methacrylate and 2 parts of N-methylolacrylamide, 4 parts of chain extender, 2.5 parts of isooctylphenol polyoxyethylene ether, 1.5 parts of sodium dodecyl benzene sulfonate, 0.8 part of initiator, 4 parts of neutralizing agent, 85 parts of deionized water, 3 parts of film forming aid, 3 parts of propylene methyl ether acetate and 2 parts of antifreeze agent, wherein the antifreeze agent is ethylene glycol. Preferably, the method comprises the following steps of: 32 parts of polyadipic acid-1, 4-butanediol glycol, 10 parts of polypropylene glycol, 6 parts of 2, 2-dimethylolpropionic acid, 18 parts of dimethyl terephthalate and 6 parts of adipic acid, 4 pa