Preparation method, product and application of composite waterproof and breathable finishing agent

Abstract

The invention discloses a preparation method, product and application of a composite waterproof and breathable finishing agent, including the preparation of a composite waterproof agent: compounding a fatty acid with a waterproof function with an alkyl alkoxy silane compound, adding it to pure water and stirring it evenly to obtain a composite waterproof agent; compounding a softening agent: adding an epoxy-modified silicone softener HA-920 to the composite waterproof agent, stirring it evenly, and obtaining a composite waterproof and breathable finishing agent. The present invention increases the penetration of the composite waterproof agent to the fabric by using a composite waterproof agent and a softener with good compatibility, and forms a uniform film of a certain scale for waterproofing when the fiber surface is cured. Since the doping of multiple components can produce micropores in the film to achieve the effect of breathability, the multiple components can be effectively combined to form a synergistic effect, giving the fabric waterproof, breathable and soft properties.

Description

Technical Field

[0001] The invention belongs to the field of production of functional finishing agents for textile fabrics, and specifically relates to a preparation method, product and application of a composite waterproof and breathable finishing agent. Background Art

[0002] The main functions of waterproof and breathable fabrics are: waterproof, moisture permeable, breathable, insulating, windproof, and warm. In terms of production technology, the technical requirements of waterproof and breathable fabrics are much higher than those of general waterproof fabrics; at the same time, in terms of quality, waterproof and breathable fabrics also have functional characteristics that other waterproof fabrics do not have. While strengthening the air tightness and water tightness of the fabric, the unique vapor permeability of waterproof and breathable fabrics can quickly discharge the water vapor inside the structure, avoid the growth of mold in the structure, and keep the human body dry at all times. It perfectly solves the problems of breathability, windproof, waterproof, and warm, and is a new type of healthy and environmentally friendly fabric.

[0003] Real waterproof fabrics can withstand water seepage pressure even in a humid climate for a long time without leaking water. For example, walking outdoors in wind and rain for a long time, kneeling or sitting on wet ground will not leak water.

[0004] The existing waterproof fabrics on the market are difficult to achieve the above performance, and it is difficult to take into account the requirements of waterproofness, breathability, softness and comfort. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for preparing a composite waterproof and breathable finishing agent.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a method for preparing a composite waterproof and breathable finishing agent, comprising:

[0009] Preparation of the composite waterproofing agent: compounding a fatty acid with waterproofing function with an alkyl alkoxy silane compound, adding the mixture into pure water and stirring the mixture evenly to prepare the composite waterproofing agent;

[0010] Compounding of softening aids: Add epoxy-modified silicone softener HA-920 to the composite waterproof agent and stir evenly to obtain the composite waterproof and breathable finishing agent.

[0011] As a preferred embodiment of the method for preparing the composite waterproof and breathable finishing agent of the present invention, the fatty acid with waterproof function includes acrylic acid and crotonic acid.

[0012] As a preferred embodiment of the method for preparing the composite waterproof and breathable finishing agent of the present invention, the alkyl alkoxy silane includes methyl trimethoxy silane.

[0013] As a preferred embodiment of the method for preparing the composite waterproof and breathable finishing agent of the present invention, the mass ratio of the fatty acid with waterproof function to the alkyl alkoxy silane is 1:9 to 9:1.

[0014] As a preferred solution of the preparation method of the composite waterproof and breathable finishing agent of the present invention, wherein: the composite waterproof agent, wherein the solvent is water, the mass concentration of the solution is 5-30%.

[0015] As a preferred embodiment of the method for preparing the composite waterproof and breathable finishing agent of the present invention, the composite waterproof and breathable finishing agent is obtained by uniformly stirring, wherein the stirring speed is 100 to 500 r / min.

[0016] As a preferred embodiment of the method for preparing the composite waterproof and breathable finishing agent of the present invention, the epoxy-modified silicone softener HA-920 is added to the composite waterproof agent, wherein the ratio of the epoxy-modified silicone softener HA-920 to the waterproof compounding agent is 1:19 to 1:1 by mass ratio.

[0017] As a preferred solution of the method for preparing the composite waterproof and breathable finishing agent of the present invention, the solution concentration of the composite waterproof and breathable finishing agent is 5-40%.

[0018] Another object of the present invention is to overcome the deficiencies in the prior art and provide a method for preparing a composite waterproof and breathable finishing agent to obtain a product.

[0019] Another object of the present invention is to overcome the deficiencies in the prior art and provide a composite waterproof and breathable functional finishing agent product for use in textile fabric finishing, comprising:

[0020] The double-dipping and double-rolling process is adopted, the concentration of the composite waterproof and breathable functional finishing agent is 2-8%, the solvent is water, the drying temperature is 130-180°C, and the drying time is 0.5-4h.

[0021] Beneficial effects of the present invention:

[0022] The softening composite waterproof and breathable finishing agent produced by the present invention can significantly improve the waterproof and comfort effects of the product. The composite waterproof agent is matched with a softener with good compatibility to increase the penetration of the composite waterproof agent into the fabric. When solidified on the fiber surface, a uniform film of a certain scale can be formed for waterproofing. Due to the doping use of multiple components, micropores can be generated in the film to achieve the effect of breathability. The multiple components can be effectively combined to form a synergistic effect, thereby giving the fabric waterproof, breathable and soft properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0024] Figure 1 This is a comparison diagram of fabric finishing in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the embodiments of the specification.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] The raw materials in the present invention are all common commercially available products.

[0029] Embodiment 1:

[0030] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0031] Preparation of composite waterproofing agent: Compound acrylic acid with waterproofing function and methyltrimethoxysilane in a ratio of 1:9, add to pure water to prepare a 5% concentration solution, and stir evenly;

[0032] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, the ratio of added amount to the composite waterproofing agent is 1:19, and the concentration of the composite waterproof and breathable finishing agent is 5.25%.

[0033] The two-dip and two-roll process was adopted, the added concentration of the composite waterproof and breathable finishing agent was 2%, the solvent was water, the drying temperature was 150°C, and the drying time was 2h.

[0034] The waterproof grade of the fabric after finishing is 3;

[0035] The air permeability of fabrics is tested according to GB / T 5453-1997, with a pressure difference of 300Pa and air flow of 39mm / s (5cm 2 ).

[0036] Embodiment 2:

[0037] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0038] Preparation of composite waterproofing agent: Acrylic acid with waterproofing function and methyltrimethoxysilane are compounded in a ratio of 1:4, added into pure water to prepare a 5% concentration solution, and stirred evenly;

[0039] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:19. The concentration of the composite waterproof and breathable finishing agent is 5.25%.

[0040] The two-dip and two-roll process was adopted, the added concentration of the composite waterproof and breathable finishing agent was 2%, the solvent was water, the drying temperature was 150°C, and the drying time was 2h.

[0041] The waterproof grade of the fabric after finishing is 3;

[0042] The air permeability of fabrics is tested according to GB / T 5453-1997, with a pressure difference of 300Pa and air flow of 38mm / s (5cm 2 ).

[0043] Embodiment 3:

[0044] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0045] Preparation of composite waterproofing agent: Compound acrylic acid with waterproofing function and methyltrimethoxysilane in a ratio of 1:2, add to pure water to prepare a 5% concentration solution, and stir evenly;

[0046] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:19. The concentration of the composite waterproof and breathable finishing agent is 5.25%.

[0047] The two-dip and two-roll process was adopted, the added concentration of the composite waterproof and breathable finishing agent was 2%, the solvent was water, the drying temperature was 150°C, and the drying time was 2h.

[0048] The waterproof grade of the fabric after finishing is 3+ (better than grade 3, slightly worse than grade 3.5, between grades 3-3.5, in the grade assessment, ± is used to indicate the range within 0.5);

[0049] The air permeability of fabrics is tested according to GB / T 5453-1997, with a pressure difference of 300Pa and air flow of 38mm / s (5cm 2 ).

[0050] Embodiment 4:

[0051] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0052] Preparation of composite waterproofing agent: Compound acrylic acid with waterproofing function and methyltrimethoxysilane in a ratio of 1:1, add to pure water to prepare a 5% concentration solution, and stir evenly;

[0053] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:19. The concentration of the composite waterproof and breathable finishing agent is 5.25%.

[0054] The two-dip and two-roll process was adopted, the added concentration of the composite waterproof and breathable finishing agent was 2%, the solvent was water, the drying temperature was 150°C, and the drying time was 2h.

[0055] The waterproof grade of the fabric after finishing is 3.

[0056] At this time, increasing the proportion of methyltrimethoxysilane will reduce the effect, so the optimal ratio of acrylic acid to methyltrimethoxysilane is 1:2.

[0057] The air permeability of fabrics is tested according to GB / T 5453-1997, with a pressure difference of 300Pa and air flow of 39mm / s (5cm 2 ).

[0058] Embodiment 5:

[0059] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0060] Preparation of composite waterproofing agent: acrylic acid with waterproofing function and methyltrimethoxysilane are compounded in a ratio of 1:2, added into pure water to prepare a 10% concentration solution, and stirred evenly;

[0061] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:19. The concentration of the composite waterproof and breathable finishing agent is 10.5%.

[0062] The two-dip and two-roll process was adopted, the added concentration of the composite waterproof and breathable finishing agent was 2%, the solvent was water, the drying temperature was 150°C, and the drying time was 2h.

[0063] The waterproof grade of the fabric after finishing is 3.5;

[0064] The air permeability of fabrics is tested according to GB / T 5453-1997, with a pressure difference of 300Pa and air flow of 38mm / s (5cm 2 ).

[0065] Embodiment 6:

[0066] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0067] Preparation of composite waterproofing agent: Acrylic acid with waterproofing function and methyltrimethoxysilane are compounded in a ratio of 1:2, added into pure water to prepare a 15% concentration solution, and stirred evenly;

[0068] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:19. The concentration of the composite waterproof and breathable finishing agent is 15.75%.

[0069] The two-dip and two-roll process was adopted, the added concentration of the composite waterproof and breathable finishing agent was 2%, the solvent was water, the drying temperature was 150°C, and the drying time was 2h.

[0070] The waterproof grade of the fabric after finishing is 3.5+ (between 3.5 and 4);

[0071] The air permeability of fabrics is tested according to GB / T 5453-1997, with a pressure difference of 300Pa and air flow of 37mm / s (5cm 2 ).

[0072] Embodiment 7:

[0073] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0074] Preparation of composite waterproofing agent: Compound acrylic acid with waterproofing function and methyltrimethoxysilane in a ratio of 1:2, add to pure water to prepare a 20% concentration solution, and stir evenly;

[0075] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:19. The concentration of the composite waterproof and breathable finishing agent is 21%.

[0076] The two-dip and two-roll process was adopted, the added concentration of the composite waterproof and breathable finishing agent was 2%, the solvent was water, the drying temperature was 150°C, and the drying time was 2h.

[0077] The waterproof grade of the fabric after finishing is 4;

[0078] The air permeability of fabrics is tested according to GB / T 5453-1997, with a pressure difference of 300Pa and air flow of 34mm / s (5cm 2 ).

[0079] Embodiment 8:

[0080] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0081] Preparation of composite waterproofing agent: Compound acrylic acid with waterproofing function and methyltrimethoxysilane in a ratio of 1:2, add to pure water to prepare a 25% concentration solution, and stir evenly;

[0082] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:19. The concentration of the composite waterproof and breathable finishing agent is 26.25%.

[0083] The double-dip and double-roll process is adopted, the added concentration of the composite waterproof and breathable finishing agent is 2%, the solvent is water, the drying temperature is 150℃, and the drying time is 2h. The waterproof grade of the fabric after finishing is 4, and the air permeability of the fabric is tested according to the reference standard GB / T5453-1997, the pressure difference is 300Pa, and the air flow is 23mm / s (5cm 2 ), the air permeability becomes worse.

[0084] At this time, increasing the concentration of the softening composite waterproof and breathable finishing agent does not improve the waterproof performance of the fabric, which means that the concentration of the waterproof finishing agent is sufficient to cover the fabric. If the concentration continues to increase, the air permeability will deteriorate.

[0085] Embodiment 9:

[0086] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0087] Preparation of composite waterproofing agent: Compound acrylic acid with waterproofing function and methyltrimethoxysilane in a ratio of 1:2, add to pure water to prepare a 20% concentration solution, and stir evenly;

[0088] Compounding of softening aids: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:9. The concentration of the composite waterproof and breathable finishing agent is 22%.

[0089] The double-dip and double-roll process is adopted, the added concentration of the composite waterproof and breathable finishing agent is 2%, the solvent is water, the drying temperature is 150℃, and the drying time is 2h. The waterproof grade of the fabric after finishing is 4+. The air permeability of the fabric is tested according to the reference standard GB / T 5453-1997, the pressure difference is 300Pa, and the air flow is 35mm / s (5cm 2 ).

[0090] Embodiment 10:

[0091] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0092] Preparation of composite waterproofing agent: Compound acrylic acid with waterproofing function and methyltrimethoxysilane in a ratio of 1:2, add to pure water to prepare a 20% concentration solution, and stir evenly;

[0093] Compounding of softening agents: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:4. The concentration of the composite waterproof and breathable finishing agent is 24%.

[0094] The double-dip and double-roll process is adopted, the added concentration of the composite waterproof and breathable finishing agent is 2%, the solvent is water, the drying temperature is 150℃, and the drying time is 2h. The waterproof grade of the fabric after finishing is 4.5. The air permeability of the fabric is tested according to the reference standard GB / T 5453-1997, the pressure difference is 300Pa, and the air flow is 37mm / s (5cm 2 ).

[0095] Fabric finishing comparison chart, see Figure 1 ,in, Figure 1 The left picture shows the waterproof effect of unfinished fabric. Figure 1 The picture on the right shows the waterproof effect of the fabric after finishing.

[0096] Embodiment 11:

[0097] This embodiment provides a method for preparing a composite waterproof and breathable finishing agent, and the steps are as follows:

[0098] Preparation of composite waterproofing agent: Compound acrylic acid with waterproofing function and methyltrimethoxysilane in a ratio of 1:2, add to pure water to prepare a 20% concentration solution, and stir evenly;

[0099] Compounding of softening agents: Add epoxy-modified silicone softener HA-92 to the above composite waterproofing agent solution, with the ratio of the added amount to the composite waterproofing agent being 1:2. The concentration of the composite waterproof and breathable finishing agent is 26.7%.

[0100] The double-dip and double-roll process is adopted, the added concentration of the composite waterproof and breathable finishing agent is 2%, the solvent is water, the drying temperature is 150℃, and the drying time is 2h. The waterproof grade of the fabric after finishing is 4.5. The air permeability of the fabric is tested according to the reference standard GB / T 5453-1997, the pressure difference is 300Pa, and the air flow is 38mm / s (5cm 2 ).

[0101] Continuing to increase the amount of softener, the waterproof effect did not improve, but the air permeability was slightly improved. This was mainly because the increase in the softener affected the uniformity of the membrane, turning it into a membrane with a microporous structure. In addition, due to the increase in the overall concentration of the finishing agent, it became viscous, which was not conducive to preparation and the cost would also increase. Therefore, the optimal addition ratio of softener to waterproof compound was 1:4.

[0102] The present invention proposes for the first time a composite waterproofing agent, which is matched with a softener with good compatibility. When solidified on the surface, it can form a certain film for waterproofing. Due to the doping of multiple components, micropores can be generated to achieve a breathable effect. The multiple components can be effectively combined to form a synergistic effect.

[0103] The present invention adds a softening component, and the softening component can be fully combined with the waterproof component, which is different from the previous incompatible system. At the same time, the three components are fused together to form a microporous membrane, which gives the fabric good air permeability and changes the defect of the previous waterproof fabric being airtight. The three components are compatible. When the softener enters the waterproof system, it can affect its film-forming property, making it a uniform microporous membrane instead of a uniform airtight membrane.

[0104] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. Application of a composite waterproof and breathable finishing agent in the finishing of textile fabrics, characterized in that: include, Preparation of composite waterproofing agent: Compound acrylic acid and methyltrimethoxysilane, add into pure water and stir evenly to prepare composite waterproofing agent, the mass concentration of the solution is 20%; Compounding of softening agents: Add epoxy-modified silicone softener HA-920 to the composite waterproof agent and stir evenly to obtain a composite waterproof and breathable finishing agent; The double-dipping and double-rolling process is adopted, the concentration of the composite waterproof and breathable finishing agent is 2-8%, the solvent is water, the drying temperature is 130-180°C, and the drying time is 0.5-4h; The mass ratio of the acrylic acid to methyltrimethoxysilane is 1:

2.

2. The use of the composite waterproof and breathable finishing agent as claimed in claim 1 in the finishing of textile fabrics, characterized in that: During the compounding process of the softening aid, the stirring speed is 100 to 500 r / min.

3. The use of the composite waterproof and breathable finishing agent as claimed in claim 1 in the finishing of textile fabrics, characterized in that: The epoxy-modified silicone softener HA-920 is added to the composite waterproofing agent, wherein the added ratio of the epoxy-modified silicone softener HA-920 to the composite waterproofing agent is 1:19 to 1:1 in terms of mass ratio.

4. Use of the composite waterproof and breathable finishing agent according to any one of claims 1 to 3 in the finishing of textile fabrics, characterized in that: The solution concentration of the composite waterproof and breathable finishing agent is 5-40%.

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