Environment-friendly water-based adhesive

Abstract

The invention relates to the technical field of adhesives, and discloses an environment-friendly water-based adhesive. Comprising the following components in parts by weight: 50-70 parts of waterborne polyurethane resin, 10-15 parts of polyvinyl alcohol, 5-10 parts of acrylate copolymer emulsion, 3-7 parts of lauryl sodium sulfate, 20-30 parts of diisocyanate, 1-5 parts of a thickening agent, 0.5-1.5 parts of a preservative, 5-9 parts of an initiator, 3-6 parts of a modifier, 0.3-1 part of a flatting agent, 3-5 parts of a mildew preventive and 60-90 parts of deionized water. The thickening agent is carboxymethyl cellulose; the preservative is one of sodium benzoate, calcium propionate and benzisothiazolinone; the initiator is one of an ammonium persulfate solution and a potassium persulfate solution; the water is used as a solvent and is non-toxic, harmless and environment-friendly, and the thickening agent and the modifying agent are added, so that the adhesive is stable in performance, high in adhesive force, wide in application range, simple in preparation process and easy for industrial production.

Description

Technical Field

[0001] The invention relates to the technical field of adhesives, in particular to an environmentally friendly water-based adhesive. Background Art

[0002] Adhesives are an indispensable chemical product for the development of the national economy and are widely used in various fields of the national economy. my country has now become a major producer and consumer of adhesives. There are many kinds of adhesives in use at present. Adhesives are widely used in all aspects of life, especially in board manufacturing, home decoration, etc. They are substances that people need to contact every day. However, due to the addition of harmful substances such as benzene, toluene, formaldehyde, etc., they pollute the environment and damage human health. Therefore, the application of environmentally friendly adhesives is very necessary. To this end, we propose an environmentally friendly water-based adhesive. Summary of the invention

[0003] The purpose of the present invention is to provide an environmentally friendly water-based adhesive to solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an environmentally friendly water-based adhesive, comprising the following components in parts by weight: 50-70 parts of waterborne polyurethane resin, 10-15 parts of polyvinyl alcohol, 5-10 parts of acrylic copolymer emulsion, 3-7 parts of sodium lauryl sulfate, 20-30 parts of diisocyanate, 1-5 parts of thickener, 0.5-1.5 parts of preservative, 5-9 parts of initiator, 3-6 parts of modifier, 0.3-1 parts of leveling agent, 3-5 parts of mildewproof agent and 60-90 parts of deionized water.

[0005] Preferably, the thickener is carboxymethyl cellulose.

[0006] Preferably, the preservative is one of sodium benzoate, calcium propionate and benzisothiazolinone.

[0007] Preferably, the initiator is one of an ammonium persulfate solution and a potassium persulfate solution.

[0008] Preferably, the modifier is one of carboxylated styrene-butadiene rubber, siloxane and phosphate ester.

[0009] Preferably, the leveling agent is one of an acrylate leveling agent and a silicone leveling agent.

[0010] Preferably, the mildew inhibitor is one or more of methylisothiazolinone, chloromethylisothiazolinone, benzalkonium chloride and zinc pyrithione.

[0011] Preferably, the method for preparing the environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 80-100°C, keep the temperature for 2-3.5 hours and then cool to room temperature to prepare solution A; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The mixture is heated to 50-60°C, kept warm for 1-2 hours, and then cooled to room temperature again to prepare solution B. S3: Finally, add diisocyanate and modifier to solution B in the reactor in proportion while stirring, stir for 30-50 minutes, raise the temperature in the reactor to 60-80°C, keep warm for 20-30 minutes, then add leveling agent and mildewproof agent, stir for 10-15 minutes, and then cool to room temperature to make the finished product.

[0012] Preferably, the stirring rate in S1 is 1000-1200 r / min.

[0013] Preferably, the stirring rate in S2 is 800-900 r / min.

[0014] The present invention provides an environmentally friendly water-based adhesive. The environmentally friendly water-based adhesive has the following beneficial effects: (1) This environmentally friendly water-based adhesive uses water as a solvent, is non-toxic and harmless, and is environmentally friendly. By adding thickeners and modifiers, the adhesive can have stable performance, strong bonding force, a wide range of applications, a simple preparation process, and is easy to industrialize; (2) The environmentally friendly water-based adhesive has a mildew-proof effect by adding a preservative, thereby increasing the service life of the adhesive. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] Embodiment 1:

[0018] An environmentally friendly water-based adhesive comprises the following components in parts by weight: 50 parts of waterborne polyurethane resin, 10 parts of polyvinyl alcohol, 5 parts of acrylic copolymer emulsion, 3 parts of sodium lauryl sulfate, 20 parts of diisocyanate, 1 part of thickener, 0.5 parts of preservative, 5 parts of initiator, 3 parts of modifier, 0.3 parts of leveling agent, 3 parts of mildewproof agent and 60 parts of deionized water; The thickener is carboxymethyl cellulose; the preservative is sodium benzoate; the initiator is ammonium persulfate solution; the modifier is carboxylated styrene-butadiene rubber; the leveling agent is an acrylate leveling agent; and the mildew preventer is methylisothiazolinone.

[0019] A method for preparing an environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 80°C, keep the temperature for 2 hours and then cool to room temperature to prepare solution A; The stirring rate is 1000r / min; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The mixture is heated to 50° C., kept at this temperature for 1 hour, and then cooled to room temperature again to prepare solution B. The stirring rate is 800r / min; S3: Finally, diisocyanate and modifier are added to solution B in the reactor in proportion while stirring, and stirred for 30 minutes. The temperature in the reactor is raised to 60°C and kept warm for 20 minutes. Then, leveling agent and mildew inhibitor are added, stirred for 10 minutes, and then cooled to room temperature to make the finished product.

[0020] Embodiment 2:

[0021] An environmentally friendly water-based adhesive comprises the following components by weight: 70 parts of waterborne polyurethane resin, 15 parts of polyvinyl alcohol, 10 parts of acrylic copolymer emulsion, 7 parts of sodium lauryl sulfate, 30 parts of diisocyanate, 5 parts of thickener, 1.5 parts of preservative, 9 parts of initiator, 6 parts of modifier, 1 part of leveling agent, 5 parts of mildewproof agent and 90 parts of deionized water; The thickener is carboxymethyl cellulose; the preservative is calcium propionate; the initiator is potassium persulfate solution; the modifier is siloxane; the leveling agent is an organic silicon leveling agent; and the mildew preventer is chloromethylisothiazolinone.

[0022] A method for preparing an environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 100°C, keep the temperature for 3.5 hours and then cool to room temperature to prepare solution A; The stirring rate is 1200r / min; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The mixture is heated to 60° C., kept at this temperature for 2 hours, and then cooled to room temperature again to prepare solution B. The stirring rate is 900r / min; S3: Finally, diisocyanate and modifier are added to solution B in the reactor in proportion while stirring, and stirred for 50 minutes. The temperature in the reactor is raised to 80°C and kept warm for 30 minutes. Then, leveling agent and mildew inhibitor are added, stirred for 15 minutes, and then cooled to room temperature to make the finished product.

[0023] Embodiment three:

[0024] An environmentally friendly water-based adhesive comprises the following components by weight: 60 parts of waterborne polyurethane resin, 12 parts of polyvinyl alcohol, 7 parts of acrylic copolymer emulsion, 5 parts of sodium lauryl sulfate, 25 parts of diisocyanate, 3 parts of thickener, 1 part of preservative, 7 parts of initiator, 4 parts of modifier, 0.5 parts of leveling agent, 4 parts of mildewproof agent and 75 parts of deionized water; The thickener is carboxymethyl cellulose; the preservative is benzisothiazolinone; the initiator is ammonium persulfate solution; the modifier is phosphate ester; the leveling agent is an acrylate leveling agent; and the mildewproof agent is benzalkonium chloride.

[0025] A method for preparing an environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 90°C, keep the temperature for 2.5 hours and then cool to room temperature to prepare solution A; The stirring rate is 1100r / min; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The mixture is heated to 55° C., kept at this temperature for 1.5 h, and then cooled to room temperature again to prepare solution B. The stirring rate is 850r / min; S3: Finally, diisocyanate and modifier are added to solution B in the reactor in proportion while stirring, and stirred for 40 minutes. The temperature in the reactor is raised to 70°C and kept warm for 25 minutes. Then, leveling agent and mildew inhibitor are added, stirred for 12 minutes, and then cooled to room temperature to make the finished product.

[0026] Embodiment 4:

[0027] An environmentally friendly water-based adhesive comprises the following components by weight: 55 parts of waterborne polyurethane resin, 13 parts of polyvinyl alcohol, 8 parts of acrylic copolymer emulsion, 6 parts of sodium lauryl sulfate, 28 parts of diisocyanate, 4 parts of thickener, 1.2 parts of preservative, 8 parts of initiator, 5 parts of modifier, 0.9 parts of leveling agent, 3.5 parts of mildewproof agent and 80 parts of deionized water; The thickener is carboxymethyl cellulose; the preservative is calcium propionate; the initiator is potassium persulfate solution; the modifier is carboxylated styrene-butadiene rubber; the leveling agent is an organosilicon-type leveling agent; and the mildewproof agent is methylisothiazolinone.

[0028] A method for preparing an environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 95°C, keep the temperature for 3 hours and then cool to room temperature to prepare solution A; The stirring rate is 1150r / min; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The temperature is raised to 58° C., kept at this temperature for 1.8 h, and then lowered to room temperature again to prepare solution B. The stirring rate is 880r / min; S3: Finally, diisocyanate and modifier were added to solution B in the reactor in proportion while stirring, and stirred for 45 minutes. The temperature in the reactor was raised to 75°C and kept warm for 28 minutes. Then, leveling agent and mildew inhibitor were added, stirred for 14 minutes, and then cooled to room temperature to make the finished product.

[0029] Embodiment five:

[0030] An environmentally friendly water-based adhesive comprises the following components in parts by weight: 52 parts of waterborne polyurethane resin, 11 parts of polyvinyl alcohol, 6 parts of acrylic copolymer emulsion, 4 parts of sodium lauryl sulfate, 21 parts of diisocyanate, 2 parts of thickener, 0.6 parts of preservative, 6 parts of initiator, 4 parts of modifier, 0.4 parts of leveling agent, 3.5 parts of mildewproof agent and 70 parts of deionized water; The thickener is carboxymethyl cellulose; the preservative is calcium propionate; the initiator is ammonium persulfate solution; the modifier is siloxane; the leveling agent is an acrylate leveling agent; and the mildew preventer is chloromethylisothiazolinone.

[0031] A method for preparing an environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 85°C, keep the temperature for 2.4 hours and then cool to room temperature to prepare solution A; The stirring rate is 1050 r / min; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The temperature is raised to 52° C., kept at this temperature for 1.2 h, and then lowered to room temperature again to prepare solution B. The stirring rate is 820 r / min; S3: Finally, diisocyanate and modifier were added to solution B in the reactor in proportion while stirring for 35 minutes. The temperature in the reactor was raised to 65°C and kept warm for 22 minutes. Then, leveling agent and mildew inhibitor were added, stirred for 11 minutes, and then cooled to room temperature to make the finished product.

[0032] Embodiment six:

[0033] An environmentally friendly water-based adhesive comprises the following components by weight: 66 parts of waterborne polyurethane resin, 9 parts of polyvinyl alcohol, 4.5 parts of acrylic copolymer emulsion, 3 parts of sodium lauryl sulfate, 20 parts of diisocyanate, 1 part of thickener, 0.7 parts of preservative, 5.5 parts of initiator, 4.5 parts of modifier, 0.6 parts of leveling agent, 4.5 parts of mildewproof agent and 75 parts of deionized water; The thickener is carboxymethyl cellulose; the preservative is benzisothiazolinone; the initiator is potassium persulfate solution; the modifier is phosphate ester; the leveling agent is an organosilicon leveling agent; and the mildewproof agent is chloromethylisothiazolinone.

[0034] A method for preparing an environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 97°C, keep the temperature for 2.7 hours and then cool to room temperature to prepare solution A; The stirring rate is 1120r / min; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The mixture is heated to 57° C., kept at this temperature for 1.7 h, and then cooled to room temperature again to prepare solution B. The stirring rate is 870r / min; S3: Finally, diisocyanate and modifier were added to solution B in the reactor in proportion while stirring, and stirred for 47 minutes. The temperature in the reactor was raised to 77°C and kept warm for 27 minutes. Then, leveling agent and mildew inhibitor were added, stirred for 14 minutes, and then cooled to room temperature to make the finished product.

[0035] Embodiment seven:

[0036] An environmentally friendly water-based adhesive comprises the following components by weight: 68 parts of waterborne polyurethane resin, 11 parts of polyvinyl alcohol, 5.5 parts of acrylic copolymer emulsion, 4 parts of sodium lauryl sulfate, 21 parts of diisocyanate, 2 parts of thickener, 0.8 parts of preservative, 5.6 parts of initiator, 4.6 parts of modifier, 0.7 parts of leveling agent, 4.6 parts of mildewproof agent and 76 parts of deionized water; The thickener is carboxymethyl cellulose; the preservative is calcium propionate; the initiator is potassium persulfate solution; the modifier is siloxane; the leveling agent is an acrylate leveling agent; and the mildew preventer is methylisothiazolinone.

[0037] A method for preparing an environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 98°C, keep the temperature for 2.8 hours and then cool to room temperature to prepare solution A; The stirring rate is 1125 r / min; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The temperature is raised to 56° C., kept at this temperature for 1.8 h, and then lowered to room temperature again to prepare solution B. The stirring rate is 900r / min; S3: Finally, diisocyanate and modifier are added to solution B in the reactor in proportion while stirring, and stirred for 48 minutes. The temperature in the reactor is raised to 78°C and kept warm for 28 minutes. Then, leveling agent and mildew inhibitor are added, stirred for 15 minutes, and then cooled to room temperature to make the finished product.

[0038] Embodiment eight:

[0039] An environmentally friendly water-based adhesive comprises the following components by weight: 64 parts of waterborne polyurethane resin, 8 parts of polyvinyl alcohol, 4 parts of acrylic copolymer emulsion, 4.5 parts of sodium lauryl sulfate, 19 parts of diisocyanate, 2.5 parts of thickener, 0.5 parts of preservative, 4.8 parts of initiator, 4.3 parts of modifier, 0.4 parts of leveling agent, 4.3 parts of mildewproof agent and 73 parts of deionized water; The thickener is carboxymethyl cellulose; the preservative is benzisothiazolinone; the initiator is potassium persulfate solution; the modifier is phosphate ester; the leveling agent is an acrylate leveling agent; and the mildew preventer is zinc pyrithione.

[0040] A method for preparing an environmentally friendly water-based adhesive comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 95°C, keep the temperature for 2.4 hours and then cool to room temperature to prepare solution A; The stirring rate is 1140r / min; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The mixture is heated to 53° C., kept at this temperature for 1.4 h, and then cooled to room temperature again to prepare solution B. The stirring rate is 950r / min; S3: Finally, diisocyanate and modifier are added to solution B in the reactor in proportion while stirring, and stirred for 45 minutes. The temperature in the reactor is raised to 75°C and kept warm for 23 minutes. Then, leveling agent and mildew inhibitor are added, stirred for 12 minutes, and then cooled to room temperature to make the finished product.

[0041] Comparative Example: Table 1 below is a comparison of each embodiment with the national emission standards. Table 1 <![CDATA[Formaldehyde mg / m 3 > <![CDATA[Toluene mg / m 3 > <![CDATA[Benzene mg / m 3 > Embodiment 1 0.05 0.15 0.015 Embodiment 2 0.04 0.18 0.028 Embodiment 3 0.06 0.08 0.024 Embodiment 4 0.055 0.16 0.018 Embodiment 5 0.035 0.14 0.019 Embodiment 6 0.072 0.07 0.016 Embodiment 7 0.045 0.06 0.027 Embodiment 8 0.03 0.09 0.014 National emission standard GB / T18883-2022 ≤0.08 ≤0.2 ≤0.03 The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An environmentally friendly water-based adhesive, characterized in that: The invention comprises the following components in parts by weight: 50-70 parts of waterborne polyurethane resin, 10-15 parts of polyvinyl alcohol, 5-10 parts of acrylic copolymer emulsion, 3-7 parts of sodium lauryl sulfate, 20-30 parts of diisocyanate, 1-5 parts of thickener, 0.5-1.5 parts of preservative, 5-9 parts of initiator, 3-6 parts of modifier, 0.3-1 parts of leveling agent, 3-5 parts of mildewproof agent and 60-90 parts of deionized water.

2. The environmentally friendly water-based adhesive according to claim 1, characterized in that: The thickener is carboxymethyl cellulose.

3. The environmentally friendly water-based adhesive according to claim 1, characterized in that: The preservative is one of sodium benzoate, calcium propionate and benzisothiazolinone.

4. The environmentally friendly water-based adhesive according to claim 1, characterized in that: The initiator is one of an ammonium persulfate solution and a potassium persulfate solution.

5. The environmentally friendly water-based adhesive according to claim 1, characterized in that: The modifier is one of carboxylated styrene-butadiene rubber, siloxane and phosphate ester.

6. The environmentally friendly water-based adhesive according to claim 1, characterized in that: The leveling agent is one of an acrylate leveling agent and a silicone leveling agent.

7. The environmentally friendly water-based adhesive according to claim 1, characterized in that: The mildew preventer is one or more of methylisothiazolinone, chloromethylisothiazolinone, benzalkonium chloride and zinc pyrithione.

8. The environmentally friendly water-based adhesive according to claim 1, characterized in that: The preparation method comprises the following steps: S1: Weigh the raw materials in proportion, put the waterborne polyurethane resin, polyvinyl alcohol, acrylic copolymer emulsion and thickener into a reaction kettle, then stir evenly and heat to 80-100°C, keep the temperature for 2-3.5 hours and then cool to room temperature to prepare solution A; S2: Then, sodium dodecyl sulfate, preservative, initiator and deionized water are added to the solution A in the reactor in proportion, and the mixture is stirred evenly again. The mixture is heated to 50-60°C, kept warm for 1-2 hours, and then cooled to room temperature again to prepare solution B. S3: Finally, add diisocyanate and modifier to solution B in the reactor in proportion while stirring, stir for 30-50 minutes, raise the temperature in the reactor to 60-80°C, keep warm for 20-30 minutes, then add leveling agent and mildewproof agent, stir for 10-15 minutes, and then cool to room temperature to make the finished product.

9. The environmentally friendly water-based adhesive according to claim 8, characterized in that: The stirring rate in S1 is 1000-1200 r / min.

10. The environmentally friendly water-based adhesive according to claim 8, characterized in that: The stirring rate in S2 is 800-900r / min.