Preparation process of moisture-proof high-initial-viscosity environment-friendly pectin

Abstract

The invention relates to the technical field of pectin preparation, in particular to a preparation process of moisture-proof high-initial-viscosity environment-friendly pectin, which comprises the following steps: step 1, derusting a steel structure, step 2, cleaning the steel structure, step 3, preparing an environment-friendly graphene metal rusty anticorrosive coating, step 4, coating the steel structure, and step 5, inspecting and accepting paint coating quality. The whole recoating work time is short, the safety risk is small, rust removal and coating are fast, the recoating quality is good, the service life is long, the total manufacturing cost of the whole recoating project is not higher than that of common paint, the service life is at least doubled, the whole recoating process is environmentally friendly, no harm is caused to the environment and the human body, and the cost is low. And the standard requirement for steel structure surface treatment and the influence of environment humidity and temperature on coating work are reduced, the technology is simple, operation is convenient and fast, the working efficiency of the anti-corrosion technology is effectively improved, and the working time is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of pectin preparation, in particular to a preparation process of moisture-resistant, high initial viscosity and environmentally friendly pectin. Background Art

[0002] Adhesive is a substance with excellent bonding properties. It connects objects by bonding the surface through adhesion and cohesion. Pectin adhesive is a new type of synthetic adhesive.

[0003] However, when the existing pectin adhesive is used in a humid environment, its initial viscosity is easily affected by the humid environment, which increases its curing time, and further requires the pectin adhesive to be pressed for a long time to achieve the bonding of the glue when in use, thereby greatly reducing its convenience and efficiency of use and affecting its use efficiency. At the same time, moisture in a humid environment will chemically react with the traditional pectin adhesive, causing the strength of the adhesive layer to decrease when it encounters water, resulting in creep and a problem of decreased bonding strength. Therefore, in order to solve the above problems, a preparation process of moisture-resistant, high initial viscosity and environmentally friendly pectin is proposed. Summary of the invention

[0004] The purpose of the present invention is to provide a preparation process of moisture-resistant, high initial viscosity and environmentally friendly pectin, so as to solve the problem proposed in the above background technology that when it comes into contact with water, the strength of the glue layer decreases, resulting in creep, a decrease in bonding strength, and a long pressing time is required to achieve the bonding and molding of the glue, thereby greatly reducing the convenience and efficiency of its use.

[0005] To achieve the above object, the present invention provides the following technical solution: a preparation process of moisture-resistant high initial viscosity environmentally friendly pectin, comprising:

[0006] Step 1: Raw material selection and processing: Pectin synthetic adhesive is composed of main agent, auxiliary agent and polyvinyl alcohol. The main agent is also called main material, base material or adhesive material; auxiliary agent includes any one or more of curing agent, diluent, plasticizer, initiator, thickener, antioxidant and stabilizer;

[0007] Step 2: Prepare glue: Mix the selected raw materials in a certain proportion, and after stirring, heating, cooling and other process treatments, make glue with specific properties. Stirring is the key step to evenly mix the various raw materials. When stirring, it is also necessary to control the temperature and time to ensure the quality of the glue.

[0008] Step 3: Quality inspection: Conduct quality inspection on the prepared glue, mainly including the test of viscosity, viscosity, stability, pH value, film thickness and other parameters. Other performance tests are also required for different application fields, such as peeling force, moisture resistance, etc.

[0009] Step 4. Packaging and storage: Pack the glue that meets the quality requirements. There are various packaging forms, the most common ones are barrels, tubes, bags, etc. During the packaging process, you must also pay attention to prevent contamination and leakage. After packaging, store the glue in a dry, cool, ventilated place to avoid direct sunlight and high temperature.

[0010] Preferably, the main agent of step one includes gelatin, pectin, latex and solvent, wherein gelatin accounts for 25%, pectin accounts for 40%, latex accounts for 15%, the solvent is water, wherein water accounts for 15%, and the water temperature is 60°C to 85°C, and polyvinyl alcohol is 5%.

[0011] Preferably, in step 1, the curing agent is 3-7 parts, the diluent is 1-3 parts, the plasticizer is 1-2 parts, the initiator is 0.5-2 parts, the thickener is 0.2-1 parts, the antioxidant is 1-2 parts, and the stabilizer is 0.5-3 parts.

[0012] Preferably, the auxiliary agent in step 1 also includes any one or more of a vulcanizer, a promoter, a toughening agent, a softener, a tackifier, a foaming agent, a cross-linking agent, a repair agent, an accelerator, an antioxidant, a mildewproof agent, a reinforcing agent, a filler, an adhesive, a desiccant, a cleaning agent, a rust inhibitor, an emulsifier, an inhibitor, a coupling agent, a defoaming agent, an oxidant, a flame retardant, a photosensitizer, a preservative, a lubricant and a dye.

[0013] Preferably, the curing agent in step one is a water-based curing agent, and is any one or more of an amino resin water-based curing agent, an isocyanate water-based curing agent, an epoxy water-based curing agent and an ester water-based curing agent; the diluent in step one is any one or more of banana water, acetone, and glue; the plasticizer is any one or more of phthalate, aliphatic dibasic acid ester, phosphate ester, epoxy compound, polyester plasticizer, and chlorine-containing plasticizer; the initiator is any one or more of potassium persulfate, sodium persulfate, and ammonium persulfate; the thickener is any one or more of gelatin, sodium caseinate, and a plant thickener.

[0014] Preferably, the curing agent is an amino resin water-based curing agent or an isocyanate water-based curing agent; the diluent in the step one is banana water; the plasticizer is phthalate, phosphate, epoxy compound, polyester plasticizer; the initiator is potassium persulfate or sodium persulfate; and the thickener is gelatin and a vegetable thickener.

[0015] Preferably, in step 1, the curing agent is 4-6 parts, the diluent is 1-2 parts, the plasticizer is 1 part, the initiator is 1-2 parts, the thickener is 0.5-1 part, the antioxidant is 1 part, and the stabilizer is 1.5-3 parts.

[0016] Preferably, the preparation method in step 2 is:

[0017] (1) According to the formula ratio, weigh the qualified raw materials for use;

[0018] (2) Add water to a dissolving kettle, add the main ingredients and stir for fifteen minutes, let stand and then add polyvinyl alcohol, heat to about 95°C until the polyvinyl alcohol is dissolved, stir and mix evenly to obtain a mixed solution;

[0019] (3) adding the mixed solution into a reaction kettle, adding a diluent, a plasticizer and a thickener, and then adding a curing agent and an initiator to polymerize at 78-82° C. to obtain a semi-finished product;

[0020] (4) The semi-finished product is pumped into the regulating kettle, and the modifier and stabilizer are added within 30-45 minutes at a temperature of 50° C., and antioxidant and colorant are added as needed, and stirred at a speed of 30-40 rpm until the mixture is uniformly mixed to obtain the final product.

[0021] Compared with the prior art, the beneficial effects of the present invention are: the present invention greatly improves the initial viscosity of the glue, thereby improving its initial viscosity stability, while shortening its curing molding time, greatly reducing its pressing molding time, and at the same time having good moisture resistance, thereby making its use in a humid environment more efficient and improving its adhesive stability.

[0022] The invention adds polyvinyl alcohol with higher viscosity to increase the initial viscosity of the white latex, which better compensates for the prolonged pre-pressing time caused by the reduction of initial viscosity in relatively wet working conditions. At the same time, polyvinyl alcohol also has good compatibility with moisture on the surface of the workpiece, avoiding the situation of two layers of skin caused by moisture.

[0023] The invention is mainly prepared with pectin, and the other raw materials are also uniformly natural materials, and do not contain formaldehyde and other releasable toxic components, thereby being able to achieve a high environmental protection effect and reduce pollution.

[0024] The method of the invention is simple, easy to operate, reduces production cost and is convenient for industrial production. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] An embodiment provided by the present invention is a process for preparing moisture-resistant, high initial viscosity, environmentally friendly pectin, comprising:

[0027] Step 1: Raw material selection and processing: Pectin synthetic adhesive is composed of main agent, auxiliary agent and polyvinyl alcohol. The main agent is also called main material, base material or adhesive material; auxiliary agent includes any one or more of curing agent, diluent, plasticizer, initiator, thickener, antioxidant and stabilizer;

[0028] Step 2: Prepare glue: Mix the selected raw materials in a certain proportion, and after stirring, heating, cooling and other process treatments, make glue with specific properties. Stirring is the key step to evenly mix the various raw materials. When stirring, it is also necessary to control the temperature and time to ensure the quality of the glue.

[0029] Step 3: Quality inspection: Conduct quality inspection on the prepared glue, mainly including the test of viscosity, viscosity, stability, pH value, film thickness and other parameters. Other performance tests are also required for different application fields, such as peeling force, moisture resistance, etc.

[0030] Step 4. Packaging and storage: Pack the glue that meets the quality requirements. There are various packaging forms, the most common ones are barrels, tubes, bags, etc. During the packaging process, you must also pay attention to prevent contamination and leakage. After packaging, store the glue in a dry, cool, ventilated place to avoid direct sunlight and high temperature.

[0031] Furthermore, the main agent of step one includes gelatin, pectin, latex and solvent, wherein gelatin accounts for 25%, pectin accounts for 40%, latex accounts for 15%, and the solvent is water, wherein the water accounts for 15%, and the water temperature is 60°C to 85°C, and polyvinyl alcohol accounts for 5%.

[0032] Furthermore, in the step 1, the curing agent is 3-7 parts, the diluent is 1-3 parts, the plasticizer is 1-2 parts, the initiator is 0.5-2 parts, the thickener is 0.2-1 parts, the antioxidant is 1-2 parts, and the stabilizer is 0.5-3 parts.

[0033] Furthermore, the auxiliary agent in step 1 also includes any one or more of a vulcanizer, a promoter, a toughening agent, a softener, a tackifier, a foaming agent, a cross-linking agent, a repair agent, an accelerator, an antioxidant, a mildewproof agent, a reinforcing agent, a filler, an adhesive, a desiccant, a cleaning agent, a rust inhibitor, an emulsifier, an inhibitor, a coupling agent, a defoaming agent, an oxidant, a flame retardant, a photosensitizer, a preservative, a lubricant and a dye.

[0034] Furthermore, the curing agent in step one is a water-based curing agent, and is any one or more of an amino resin water-based curing agent, an isocyanate water-based curing agent, an epoxy water-based curing agent and an ester water-based curing agent; the diluent in step one is any one or more of banana water, acetone, and glue; the plasticizer is any one or more of phthalate, aliphatic dibasic acid ester, phosphate ester, epoxy compound, polyester plasticizer, and chlorine-containing plasticizer; the initiator is any one or more of potassium persulfate, sodium persulfate, and ammonium persulfate; the thickener is any one or more of gelatin, sodium caseinate, and a plant thickener.

[0035] Furthermore, the curing agent is an amino resin water-based curing agent or an isocyanate water-based curing agent; the diluent in the step one is banana water; the plasticizer is phthalate, phosphate, epoxy compound, polyester plasticizer; the initiator is potassium persulfate or sodium persulfate; and the thickener is gelatin and a vegetable thickener.

[0036] Furthermore, in step 1, the curing agent is 4-6 parts, the diluent is 1-2 parts, the plasticizer is 1 part, the initiator is 1-2 parts, the thickener is 0.5-1 part, the antioxidant is 1 part, and the stabilizer is 1.5-3 parts.

[0037] Example 1: The proportion of bone glue is 25%, the proportion of pectin is 40%, the proportion of latex is 15%, of which the proportion of water is 15%, the proportion of polyvinyl alcohol is 5%, the curing agent is 3 parts, the diluent is 1 part, the plasticizer is 1 part, the initiator is 0.5 parts, the thickener is 0.2 parts, the antioxidant is 1 part, and the stabilizer is 0.5 parts. The preparation method is:

[0038] (1) According to the formula ratio, weigh the qualified raw materials for use;

[0039] (2) Add water to a dissolving kettle, add the main ingredients and stir for fifteen minutes, let stand and then add polyvinyl alcohol, heat to about 95°C until the polyvinyl alcohol is dissolved, stir and mix evenly to obtain a mixed solution;

[0040] (3) adding the mixed solution into a reaction kettle, adding a diluent, a plasticizer and a thickener, and then adding a curing agent and an initiator to polymerize at 78-82° C. to obtain a semi-finished product;

[0041] (4) The semi-finished product is pumped into the regulating kettle, and the modifier and stabilizer are added within 30-45 minutes at a temperature of 50° C., and antioxidant and colorant are added as needed, and stirred at a speed of 30-40 rpm until the mixture is uniformly mixed to obtain the final product.

[0042] Example 2: The proportion of bone glue is 25%, the proportion of pectin is 40%, the proportion of latex is 15%, of which the proportion of water is 15%, the proportion of polyvinyl alcohol is 5%, the curing agent is 4 parts, the diluent is 2 parts, the plasticizer is 2 parts, the initiator is 1 part, the thickener is 0.5 parts, the antioxidant is 1 part, and the stabilizer is 1 part. The preparation method is:

[0043] (1) According to the formula ratio, weigh the qualified raw materials for use;

[0044] (2) Add water to a dissolving kettle, add the main ingredients and stir for fifteen minutes, let stand and then add polyvinyl alcohol, heat to about 95°C until the polyvinyl alcohol is dissolved, stir and mix evenly to obtain a mixed solution;

[0045] (3) adding the mixed solution into a reaction kettle, adding a diluent, a plasticizer and a thickener, and then adding a curing agent and an initiator to polymerize at 78-82° C. to obtain a semi-finished product;

[0046] (4) The semi-finished product is pumped into the regulating kettle, and the modifier and stabilizer are added within 30-45 minutes at a temperature of 50° C., and antioxidant and colorant are added as needed, and stirred at a speed of 30-40 rpm until the mixture is uniformly mixed to obtain the final product.

[0047] Example 3: The proportion of bone glue is 25%, the proportion of pectin is 40%, the proportion of latex is 15%, of which the proportion of water is 15%, the proportion of polyvinyl alcohol is 5%, the curing agent is 5 parts, the diluent is 3 parts, the plasticizer is 2 parts, the initiator is 2 parts, the thickener is 1 part, the antioxidant is 2 parts, and the stabilizer is 3 parts. The preparation method is:

[0048] (1) According to the formula ratio, weigh the qualified raw materials for use;

[0049] (2) Add water to a dissolving kettle, add the main ingredients and stir for fifteen minutes, let stand and then add polyvinyl alcohol, heat to about 95°C until the polyvinyl alcohol is dissolved, stir and mix evenly to obtain a mixed solution;

[0050] (3) adding the mixed solution into a reaction kettle, adding a diluent, a plasticizer and a thickener, and then adding a curing agent and an initiator to polymerize at 78-82° C. to obtain a semi-finished product;

[0051] (4) The semi-finished product is pumped into the regulating kettle, and the modifier and stabilizer are added within 30-45 minutes at a temperature of 50° C., and antioxidant and colorant are added as needed, and stirred at a speed of 30-40 rpm until the mixture is uniformly mixed to obtain the final product.

[0052] Example 4: The proportion of bone glue is 25%, the proportion of pectin is 40%, the proportion of latex is 15%, of which the proportion of water is 15%, the proportion of polyvinyl alcohol is 5%, the curing agent is 6 parts, the diluent is 3 parts, the plasticizer is 2 parts, the initiator is 1 part, the thickener is 1 part, the antioxidant is 2 parts, and the stabilizer is 3 parts. The preparation method is:

[0053] (1) According to the formula ratio, weigh the qualified raw materials for use;

[0054] (2) Add water to a dissolving kettle, add the main ingredients and stir for fifteen minutes, let stand and then add polyvinyl alcohol, heat to about 95°C until the polyvinyl alcohol is dissolved, stir and mix evenly to obtain a mixed solution;

[0055] (3) adding the mixed solution into a reaction kettle, adding a diluent, a plasticizer and a thickener, and then adding a curing agent and an initiator to polymerize at 78-82° C. to obtain a semi-finished product;

[0056] (4) The semi-finished product is pumped into the regulating kettle, and the modifier and stabilizer are added within 30-45 minutes at a temperature of 50° C., and antioxidant and colorant are added as needed, and stirred at a speed of 30-40 rpm until the mixture is uniformly mixed to obtain the final product.

[0057] Example 5: The proportion of bone glue is 25%, the proportion of pectin is 40%, the proportion of latex is 15%, of which the proportion of water is 15%, the proportion of polyvinyl alcohol is 5%, the curing agent is 7 parts, the diluent is 2 parts, the plasticizer is 2 parts, the initiator is 2 parts, the thickener is 1 part, the antioxidant is 1 part, and the stabilizer is 2 parts. The preparation method is:

[0058] (1) According to the formula ratio, weigh the qualified raw materials for use;

[0059] (2) Add water to a dissolving kettle, add the main ingredients and stir for fifteen minutes, let stand and then add polyvinyl alcohol, heat to about 95°C until the polyvinyl alcohol is dissolved, stir and mix evenly to obtain a mixed solution;

[0060] (3) adding the mixed solution into a reaction kettle, adding a diluent, a plasticizer and a thickener, and then adding a curing agent and an initiator to polymerize at 78-82° C. to obtain a semi-finished product;

[0061] (4) The semi-finished product is pumped into the regulating kettle, and the modifier and stabilizer are added within 30-45 minutes at a temperature of 50° C., and antioxidant and colorant are added as needed, and stirred at a speed of 30-40 rpm until the mixture is uniformly mixed to obtain the final product.

[0062] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

Claims

1. A process for preparing moisture-resistant, high initial viscosity, environmentally friendly pectin, characterized in that: include: Step 1: Raw material selection and processing: Pectin synthetic adhesive is composed of main agent, auxiliary agent and polyvinyl alcohol. The main agent is also called main material, base material or adhesive material; auxiliary agent includes any one or more of curing agent, diluent, plasticizer, initiator, thickener, antioxidant and stabilizer; Step 2: Prepare glue: Mix the selected raw materials in a certain proportion, and after stirring, heating, cooling and other process treatments, make glue with specific properties. Stirring is the key step to evenly mix the various raw materials. When stirring, it is also necessary to control the temperature and time to ensure the quality of the glue. Step 3: Quality inspection: Conduct quality inspection on the prepared glue, mainly including the test of viscosity, viscosity, stability, pH value, film thickness and other parameters. Other performance tests are also required for different application fields, such as peeling force, moisture resistance, etc. Step 4. Packaging and storage: Pack the glue that meets the quality requirements. There are various packaging forms, the most common ones are barrels, tubes, bags, etc. During the packaging process, you must also pay attention to prevent contamination and leakage. After packaging, store the glue in a dry, cool, ventilated place to avoid direct sunlight and high temperature.

2. The process for preparing the moisture-resistant, high initial viscosity, environmentally friendly pectin according to claim 1, characterized in that: The main agent of step one includes gelatin, pectin, latex and solvent, wherein gelatin accounts for 25%, pectin accounts for 40%, latex accounts for 15%, the solvent is water, wherein water accounts for 15%, and the water temperature is 60°C to 85°C, and polyvinyl alcohol accounts for 5%.

3. The preparation process of a moisture-resistant high initial viscosity environmentally friendly pectin according to claim 1, characterized in that: In the step 1, the curing agent is 3-7 parts, the diluent is 1-3 parts, the plasticizer is 1-2 parts, the initiator is 0.5-2 parts, the thickener is 0.2-1 parts, the antioxidant is 1-2 parts, and the stabilizer is 0.5-3 parts.

4. The process for preparing the moisture-resistant high initial viscosity environmentally friendly pectin according to claim 1, characterized in that: The auxiliary agent in step 1 also includes any one or more of a vulcanizing agent, a accelerator, a toughening agent, a softener, a tackifier, a foaming agent, a cross-linking agent, a repair agent, an accelerator, an antioxidant, a mildewproof agent, a reinforcing agent, a filler, an adhesive, a desiccant, a cleaning agent, a rust inhibitor, an emulsifier, an inhibitor, a coupling agent, a defoaming agent, an oxidant, a flame retardant, a photosensitizer, a preservative, a lubricant and a dye.

5. The process for preparing the moisture-resistant high initial viscosity environmentally friendly pectin according to claim 1, characterized in that: In the step 1, the curing agent is a water-based curing agent, and is any one or more of an amino resin water-based curing agent, an isocyanate water-based curing agent, an epoxy water-based curing agent and an ester water-based curing agent; the diluent in the step 1 is any one or more of banana water, acetone, and glue; the plasticizer is any one or more of phthalate, aliphatic dibasic acid ester, phosphate, epoxy compound, polyester plasticizer, and chlorine-containing plasticizer; the initiator is any one or more of potassium persulfate, sodium persulfate, and ammonium persulfate; the thickener is any one or more of gelatin, sodium caseinate, and a plant thickener.

6. The process for preparing the moisture-resistant, high initial viscosity, environmentally friendly pectin according to claim 5, characterized in that: The curing agent is an amino resin water-based curing agent or an isocyanate water-based curing agent; the first diluent in the step is banana water; the plasticizer is phthalate, phosphate, epoxy compound, polyester plasticizer; the initiator is potassium persulfate or sodium persulfate; and the thickener is gelatin and a plant-based thickener.

7. The process for preparing the moisture-resistant high initial viscosity environmentally friendly pectin according to claim 1, characterized in that: In step 1, the curing agent is 4-6 parts, the diluent is 1-2 parts, the plasticizer is 1 part, the initiator is 1-2 parts, the thickener is 0.5-1 part, the antioxidant is 1 part, and the stabilizer is 1.5-3 parts.

8. A process for preparing a moisture-resistant, high initial viscosity, environmentally friendly pectin according to any one of claims 1 to 7, characterized in that: The preparation method in step 2 is: (1) According to the formula ratio, weigh the qualified raw materials for use; (2) Add water to a dissolving kettle, add the main ingredients and stir for fifteen minutes, let stand and then add polyvinyl alcohol, heat to about 95°C until the polyvinyl alcohol is dissolved, stir and mix evenly to obtain a mixed solution; (3) adding the mixed solution into a reaction kettle, adding a diluent, a plasticizer and a thickener, and then adding a curing agent and an initiator to polymerize at 78-82° C. to obtain a semi-finished product; (4) The semi-finished product is pumped into the regulating kettle, and the modifier and stabilizer are added within 30-45 minutes at a temperature of 50° C., and antioxidant and colorant are added as needed, and stirred at a speed of 30-40 rpm until the mixture is uniformly mixed to obtain the final product.