Environment-friendly screen cloth treating agent and preparation method thereof

Abstract

The invention relates to the technical field of surface treating agents, in particular to an environment-friendly screen cloth treating agent and a preparation method thereof. The environment-friendly screen cloth treating agent is prepared from polyester polyol, unsaturated polyester resin, isocyanate, a catalyst, aldehyde ketone resin, oxalic acid and an environment-friendly solvent, the invention further provides a preparation method of the environment-friendly screen cloth treating agent, and harmful organic solvents containing benzene, methylbenzene, xylene and the like are not used. The bonding effect of the environment-friendly screen cloth treating agent is improved under the condition of meeting the requirements of safety and environmental protection at home and abroad.

Description

Technical Field

[0001] The present invention relates to the technical field of surface treatment agents, and in particular to an environmentally friendly mesh treatment agent and a preparation method thereof. Background Art

[0002] The hallmark of a mesh upper lies in its unique mesh structure, which provides excellent breathability and lightweight comfort. Feet sweat easily during exercise or leisure time. Wearing non-breathable shoes can lead to dampness, heat, and even ailments like athlete's foot. Mesh uppers effectively mitigate these issues by allowing ventilation between the foot and the surrounding environment, keeping it dry and comfortable. Furthermore, mesh uppers offer the advantages of softness and comfort. The mesh structure makes the shoe softer and less stressful. Furthermore, the breathability of the mesh upper ensures a comfortable fit even after extended wear.

[0003] Mesh is generally made of nylon, but due to its material, nylon surface treatment is relatively difficult. In addition, existing nylon surface treatment agents contain "triphenyl" organic solvents (benzene, toluene, and xylene), which are toxic and harmful to the human body. When used, they release a large amount of irritating gases, causing environmental pollution. Summary of the Invention

[0004] In order to meet the purpose of an environmentally friendly mesh treatment agent maintaining surface treatment and other properties while having environmentally friendly characteristics, the first purpose of the present invention is to provide an environmentally friendly mesh treatment agent, comprising the following raw material components: by weight, comprising the following raw materials: polyester polyol: 15-20 parts; unsaturated polyester resin: 5-15 parts; isocyanate: 2-2.5 parts; catalyst: 0.2-0.3 parts; aldehyde-ketone resin: 2-3 parts; oxalic acid: 0.05-0.1 parts; environmentally friendly solvent: 80-110 parts.

[0005] Preferably, the molecular weight of the polyester polyol is 2900-3000, and the polyester polyol is poly(1,4-butylene adipate) glycol, to prevent the polyester polyol from having poor heat resistance due to its low molecular weight, or from having difficulty in reacting or slow reaction rate due to its high molecular weight.

[0006] Preferably, the isocyanate is hexamethylene-1,6-diisocyanate; hexamethylene-1,6-diisocyanate does not contain CC double bonds, and reacts with polyadipate-1,4-butanediol to obtain a polyurethane structure, and has high reactivity, can greatly reduce reaction time, and is easy to mass produce.

[0007] Preferably, the unsaturated polyester resin is phenoxy resin PKHH.

[0008] Preferably, the weight ratio of the polyester polyol to the unsaturated polyester resin is 1:1.

[0009] Preferably, the catalyst is stannous octoate.

[0010] Preferably, the environmentally friendly solvent is dimethyl carbonate, butanone and acetone.

[0011] Preferably, the dimethyl carbonate is 30-40 parts, the butanone is 30-40 parts, and the acetone is 20-40 parts.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) Using isocyanate as a cross-linking agent, it reacts with the hydroxyl group in polyester polyol to form a polyurethane structure through cross-linking. The cross-linked polymer has a small molecular weight and is easy to diffuse. Since nylon material and polyurethane material are similar in structure, it is easy to form a cross-linked structure with the surface of nylon material, thereby improving the bonding effect of the environmentally friendly mesh treatment agent.

[0014] (2) After the unsaturated polyester resin is mixed with the polyester polyol, the hydroxyl groups in the unsaturated polyester resin and the hydroxyl groups in the polyester polyol can react with the isocyanate groups at the same time, the reaction is more complete, the reaction tolerance is reduced, and the reaction phase separation is reduced.

[0015] (3) Oxalic acid and aldehyde-ketone resin are used in combination. Oxalic acid can corrode the surface of the material, and aldehyde-ketone resin can improve the adhesion between the treatment agent and the material, thereby improving the bonding strength of the environmentally friendly mesh treatment agent.

[0016] (4) Use mixed solvents, use low-cost dimethyl carbonate, butanone and acetone, and do not use harmful organic solvents such as benzene, toluene, and xylene, so as to reduce pollution, improve the controllability of production, and at the same time reduce the overall cost of the product, in line with domestic and international safety and environmental protection requirements.

[0017] The second object of the present invention is to provide a technical solution: a method for preparing an environmentally friendly mesh treatment agent, comprising the following steps:

[0018] Step (1): adding polyester polyol, unsaturated polyester resin and environmentally friendly solvent A into a reaction kettle in sequence, mixing, stirring and dissolving at 80° C. at a stirring speed of 100 rpm for 90 min to obtain a mixture A;

[0019] Step (2): adding isocyanate to mixture A, stirring at 90° C. at a stirring speed of 60 rpm for 20 min, then adding a catalyst, stirring at 85-90° C. at a stirring speed of 120 rpm and reacting for 60 min to obtain mixture B.

[0020] Step (3): adding environmentally friendly solvent B to mixture B, stirring at room temperature at a stirring speed of 100 rpm for 60 min to obtain mixture C;

[0021] Step (4): adding the aldehyde-ketone resin and oxalic acid to the mixture C, stirring at room temperature at a stirring speed of 200 rpm for a reaction of 1.5-2.5 hours to obtain an environmentally friendly mesh treatment agent.

[0022] Preferably, the environmentally friendly solvent A in step (1) is butanone, and the environmentally friendly solvent B in step (3) is dimethyl carbonate and acetone.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) In step (1), the polyester polyol and the unsaturated polyester resin are first stirred and dissolved by butanone. Since butanone has good solubility for the polyester polyol and the unsaturated polyester resin, the polyester polyol and the unsaturated polyester resin can be better mixed and can more fully participate in the reaction in the subsequent steps.

[0025] (2) Isocyanate and a catalyst are added in step (2). The catalyst can effectively promote a variety of organic reactions, accelerate the reaction rate, and improve the reaction efficiency, so that the isocyanate and the polyester polyol can undergo a sufficient cross-linking reaction.

[0026] (3) In step (3), by adding dimethyl carbonate and acetone environmentally friendly solvents, the excellent solubility and volatility of solvents such as dimethyl carbonate and acetone are utilized to activate the surface of the nylon material, thereby improving the initial adhesion and peel strength.

[0027] (4) This preparation method only involves constant temperature stirring, dissolution and other processes, and the process flow is simple. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention.

[0029] Before further describing the specific embodiments of the present invention, it should be understood that the scope of protection of the present invention is not limited to the specific embodiments described below; it should also be understood that the terms used in the examples of the present invention are for describing specific embodiments rather than for limiting the scope of protection of the present invention.

[0030] When numerical ranges are given in the examples, it should be understood that, unless otherwise specified herein, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs.

[0031] The present invention does not limit the sources of raw materials. Unless otherwise specified, the raw materials used are common commercial products.

[0032] Example 1:

[0033] Environmentally friendly mesh treatment agent, including the following raw materials by weight:

[0034] Polyester polyol: 15 parts; phenoxy resin PKHH: 15 parts; isocyanate: 2 parts; catalyst: 0.2 parts; aldehyde ketone resin: 2 parts; oxalic acid: 0.05 parts; dimethyl carbonate: 30 parts; butanone: 35 parts; acetone: 30 parts.

[0035] The preparation method of the environmentally friendly mesh treatment agent comprises the following specific steps:

[0036] Step (1): polyester polyol, phenoxy resin PKHH and butanone were sequentially added into a reaction kettle and mixed, and stirred and dissolved at 80° C. at a stirring speed of 100 rpm for 90 min to obtain a mixture A;

[0037] Step (2): adding isocyanate to mixture A, stirring at 90° C. at a stirring speed of 60 rpm for 20 min, then adding a catalyst, stirring at 85-90° C. at a stirring speed of 120 rpm and reacting for 60 min to obtain mixture B;

[0038] Step (3): adding dimethyl carbonate and acetone to mixture B, stirring at room temperature at a stirring speed of 100 rpm for 60 min to obtain mixture C;

[0039] Step (4): adding the aldehyde-ketone resin and oxalic acid to the mixture C, stirring at room temperature at a stirring speed of 200 rpm for a reaction of 1.5-2.5 hours to obtain an environmentally friendly mesh treatment agent.

[0040] Example 2:

[0041] Environmentally friendly mesh treatment agent, including the following raw materials by weight:

[0042] Polyester polyol: 20 parts; phenoxy resin PKHH: 10 parts; isocyanate: 2 parts; catalyst: 0.2 parts; aldehyde ketone resin: 2 parts; oxalic acid: 0.05 parts; dimethyl carbonate: 30 parts; butanone: 35 parts; acetone: 30 parts.

[0043] The preparation method of the environmentally friendly mesh treatment agent comprises the following specific steps:

[0044] Step (1): polyester polyol, phenoxy resin PKHH and butanone were sequentially added into a reaction kettle and mixed, and stirred and dissolved at 80° C. at a stirring speed of 100 rpm for 90 min to obtain a mixture A;

[0045] Step (2): adding isocyanate to mixture A, stirring at 90° C. at a stirring speed of 60 rpm for 20 min, then adding a catalyst, stirring at 85-90° C. at a stirring speed of 120 rpm and reacting for 60 min to obtain mixture B;

[0046] Step (3): adding dimethyl carbonate and acetone to mixture B, stirring at room temperature at a stirring speed of 100 rpm for 60 min to obtain mixture C;

[0047] Step (4): adding the aldehyde-ketone resin and oxalic acid to the mixture C, stirring at room temperature at a stirring speed of 200 rpm for a reaction of 1.5-2.5 hours to obtain an environmentally friendly mesh treatment agent.

[0048] Example 3:

[0049] Environmentally friendly mesh treatment agent, including the following raw materials by weight:

[0050] Polyester polyol: 18 parts; phenoxy resin PKHH: 6 parts; isocyanate: 2 parts; catalyst: 0.2 parts; aldehyde ketone resin: 2 parts; oxalic acid: 0.05 parts; dimethyl carbonate: 30 parts; butanone: 35 parts; acetone: 30 parts.

[0051] The preparation method of the environmentally friendly mesh treatment agent comprises the following specific steps:

[0052] Step (1): polyester polyol, phenoxy resin PKHH and butanone were sequentially added into a reaction kettle and mixed, and stirred and dissolved at 80° C. at a stirring speed of 100 rpm for 90 min to obtain a mixture A;

[0053] Step (2): adding isocyanate to mixture A, stirring at 90° C. at a stirring speed of 60 rpm for 20 min, then adding a catalyst, stirring at 85-90° C. at a stirring speed of 120 rpm and reacting for 60 min to obtain mixture B;

[0054] Step (3): adding dimethyl carbonate and acetone to mixture B, stirring at room temperature at a stirring speed of 100 rpm for 60 min to obtain mixture C;

[0055] Step (4): adding the aldehyde-ketone resin and oxalic acid to the mixture C, stirring at room temperature at a stirring speed of 200 rpm for a reaction of 1.5-2.5 hours to obtain an environmentally friendly mesh treatment agent.

[0056] Example 4:

[0057] Environmentally friendly mesh treatment agent, including the following raw materials by weight:

[0058] Polyester polyol: 20 parts; phenoxy resin PKHH: 5 parts; isocyanate: 2 parts; catalyst: 0.2 parts; aldehyde ketone resin: 2 parts; oxalic acid: 0.05 parts; dimethyl carbonate: 30 parts; butanone: 35 parts; acetone: 30 parts.

[0059] The preparation method of the environmentally friendly mesh treatment agent comprises the following specific steps:

[0060] Step (1): polyester polyol, phenoxy resin PKHH and butanone were sequentially added into a reaction kettle and mixed, and stirred and dissolved at 80° C. at a stirring speed of 100 rpm for 90 min to obtain a mixture A;

[0061] Step (2): adding isocyanate to mixture A, stirring at 90° C. at a stirring speed of 60 rpm for 20 min, then adding a catalyst, stirring at 85-90° C. at a stirring speed of 120 rpm and reacting for 60 min to obtain mixture B;

[0062] Step (3): adding dimethyl carbonate and acetone to mixture B, stirring at room temperature at a stirring speed of 100 rpm for 60 min to obtain mixture C;

[0063] Step (4): adding the aldehyde-ketone resin and oxalic acid to the mixture C, stirring at room temperature at a stirring speed of 200 rpm for a reaction of 1.5-2.5 hours to obtain an environmentally friendly mesh treatment agent.

[0064] Example 5:

[0065] Environmentally friendly mesh treatment agent, including the following raw materials by weight:

[0066] Polyester polyol: 15 parts; phenoxy resin PKHH: 15 parts; isocyanate: 2.5 parts; catalyst: 0.25 parts; aldehyde ketone resin: 3 parts; oxalic acid: 0.1 parts; dimethyl carbonate: 40 parts; butanone: 40 parts; acetone: 40 parts.

[0067] The preparation method of the environmentally friendly mesh treatment agent comprises the following specific steps:

[0068] Step (1): polyester polyol, phenoxy resin PKHH and butanone were sequentially added into a reaction kettle and mixed, and stirred and dissolved at 80° C. at a stirring speed of 100 rpm for 90 min to obtain a mixture A;

[0069] Step (2): adding isocyanate to mixture A, stirring at 90° C. at a stirring speed of 60 rpm for 20 min, then adding a catalyst, stirring at 85-90° C. at a stirring speed of 120 rpm and reacting for 60 min to obtain mixture B;

[0070] Step (3): adding dimethyl carbonate and acetone to mixture B, stirring at room temperature at a stirring speed of 100 rpm for 60 min to obtain mixture C;

[0071] Step (4): adding the aldehyde-ketone resin and oxalic acid to the mixture C, stirring at room temperature at a stirring speed of 200 rpm for a reaction of 1.5-2.5 hours to obtain an environmentally friendly mesh treatment agent.

[0072] Example 6:

[0073] Environmentally friendly mesh treatment agent, including the following raw materials by weight:

[0074] Polyester polyol: 15 parts; phenoxy resin PKHH: 15 parts; isocyanate: 2.3 parts; catalyst: 0.3 parts; aldehyde ketone resin: 2.5 parts; oxalic acid: 0.1 parts; dimethyl carbonate: 35 parts; butanone: 35 parts; acetone: 30 parts.

[0075] The preparation method of the environmentally friendly mesh treatment agent comprises the following specific steps:

[0076] Step (1): polyester polyol, phenoxy resin PKHH and butanone were sequentially added into a reaction kettle and mixed, and stirred and dissolved at 80° C. at a stirring speed of 100 rpm for 90 min to obtain a mixture A;

[0077] Step (2): adding isocyanate to mixture A, stirring at 90° C. at a stirring speed of 60 rpm for 20 min, then adding a catalyst, stirring at 85-90° C. at a stirring speed of 120 rpm and reacting for 60 min to obtain mixture B;

[0078] Step (3): adding dimethyl carbonate and acetone to mixture B, stirring at room temperature at a stirring speed of 100 rpm for 60 min to obtain mixture C;

[0079] Step (4): adding the aldehyde-ketone resin and oxalic acid to the mixture C, stirring at room temperature at a stirring speed of 200 rpm for a reaction of 1.5-2.5 hours to obtain an environmentally friendly mesh treatment agent.

[0080] In combination with Examples 1-6, some samples were taken and laminated onto mesh materials to test their initial bonding strength, peel strength, heat aging resistance and shear strength. The results are shown in Table 1.

[0081] The initial tack is determined in accordance with the method specified in GB / T 19340-2014.

[0082] The peel strength is determined according to the method specified in GB / T 19340-2014.

[0083] The heat aging resistance is determined in accordance with the heat aging resistance method specified in GB / T 19340-2014;

[0084] The shear strength is determined according to the shear strength method specified in GB / T 19340-2014.

[0085] Table 1

[0086]

[0087] The results in Table 1 show that, with other conditions remaining the same, the treatment effect of the environmentally friendly mesh treatment agent changes with the ratio of polyester polyol to unsaturated polyester resin, resulting in enhanced initial tack and peel strength. When the ratio of polyester polyol to unsaturated polyester resin is 1:1, the system achieves optimal initial tack, peel strength, hydrolysis aging resistance, and shear strength. Therefore, after mixing the unsaturated polyester resin with the polyester polyol, the hydroxyl groups in the unsaturated polyester resin and the hydroxyl groups in the polyester polyol can react simultaneously with the isocyanate groups, resulting in a more complete reaction, a lower reaction tolerance, and less phase separation, thereby improving the adhesive effect of the environmentally friendly mesh treatment agent.

[0088] The method does not use harmful organic solvents such as benzene, toluene, and xylene, and meets domestic and international safety and environmental protection requirements. The environmentally friendly mesh treatment agent prepared by the method has good initial adhesion and peel strength properties for the mesh material and excellent hydrolysis and aging resistance.

[0089] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. An environmentally friendly mesh treatment agent, characterized by: Including the following raw materials: By weight, including the following raw materials: Polyester polyol: 15-20 parts; Unsaturated polyester resin: 5-15 parts; Isocyanate: 2-2.5 parts; Catalyst: 0.2-0.3 parts; Aldehyde-ketone resin: 2-3 parts; Oxalic acid: 0.05 parts to 0.1 parts; environmentally friendly solvent: 80 parts to 110 parts.

2. The environmentally friendly mesh treatment agent according to claim 1, characterized in that: The molecular weight of the polyester polyol is 2900-3000, and the polyester polyol is poly(1,4-butylene adipate).

3. The environmentally friendly mesh treatment agent according to claim 1, characterized in that: The isocyanate is hexamethylene-1,6-diisocyanate.

4. The environmentally friendly mesh treatment agent according to claim 1, characterized in that: The unsaturated polyester resin is phenoxy resin PKHH.

5. The environmentally friendly mesh treatment agent according to claim 1, characterized in that: The weight ratio of the polyester polyol to the unsaturated polyester resin is 1:

1.

6. The environmentally friendly mesh treatment agent according to claim 1, characterized in that: The catalyst is stannous octoate.

7. The environmentally friendly mesh treatment agent according to claim 1, characterized in that: The environmentally friendly solvents are dimethyl carbonate, butanone and acetone.

8. The environmentally friendly mesh treatment agent according to claim 7, characterized in that: The dimethyl carbonate is 30-40 parts, the butanone is 30-40 parts, and the acetone is 20-40 parts.

9. A method for preparing the environmentally friendly mesh treating agent according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step (1): adding polyester polyol, unsaturated polyester resin and environmentally friendly solvent A into a reaction kettle in sequence, mixing, stirring and dissolving at 80° C. at a stirring speed of 100 rpm for 90 min to obtain a mixture A; Step (2): adding isocyanate to mixture A, stirring at 90° C. at a stirring speed of 60 rpm for 20 min, then adding a catalyst, stirring at 85-90° C. at a stirring speed of 120 rpm and reacting for 60 min to obtain mixture B; Step (3): adding environmentally friendly solvent B to mixture B, stirring at room temperature at a stirring speed of 100 rpm for 60 min to obtain mixture C; Step (4): adding the aldehyde-ketone resin and oxalic acid to the mixture C, stirring at room temperature at a stirring speed of 200 rpm for a reaction of 1.5-2.5 hours to obtain an environmentally friendly mesh treatment agent.

10. The method for preparing the environmentally friendly mesh treatment agent according to claim 9, characterized in that: The environmentally friendly solvent A in step (1) is butanone, and the environmentally friendly solvent B in step (3) is dimethyl carbonate and acetone.

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