A kind of organic silicon water-based technical cloth sofa fabric and preparation method thereof

Abstract

The invention discloses an organic silicon water-based technical fabric sofa fabric and a preparation method thereof, and belongs to the technical field of textile fabric processing. The invention utilizes organic silicon modified corn starch to improve the water resistance of sofa fabrics, and the prepared organic silicon water-based technical fabric sofa fabric has good water resistance and strong hydrophobicity, and its water contact angle reaches 152°, has super hydrophobicity, and has good water washing fastness. After 100 times of water washing, the contact angle is still 135°. At the same time, the organic silicon modified polyurethane technical fabric has good mechanical properties, and can withstand a tensile force of 10MPa, meeting the strength requirements of non-woven fabrics for sofas.

Description

Technical Field

[0001] The invention relates to an organic silicon water-based technical cloth sofa fabric and a preparation method thereof, belonging to the technical field of textile fabric processing. Background Art

[0002] Sofa fabrics account for a large proportion of woven fabrics used in home textile decoration. With the continuous improvement of the quality of life, people have put forward higher requirements on the functionality, appearance, style and price of fabric sofa fabrics. Imitation leather fabrics are all made by post-finishing coating technology, which makes the surface of the fabric have the feel of leather. The surface coating layer is generally polyurethane coating or polyvinyl chloride coating.

[0003] As we all know, polyurethane has the characteristics of good film-forming property, good adhesion, stable emulsion, strong corrosion resistance, excellent mechanical properties, etc., and is widely used in automobile manufacturing, interior decoration, leather finishing and other industries. However, polyurethane prepared by traditional production raw materials and traditional synthesis methods has great environmental pollution, poor water resistance and low temperature resistance, and at the same time, the function of pure polyurethane coating is single. Therefore, a new technical solution is proposed here to ensure that the polyurethane coating retains its original properties while reducing its pollution to the environment, improving the thermal stability, mechanical properties and water resistance of the material, and extending its service life. Summary of the invention

[0004] In order to solve at least one of the above problems, the present invention provides a silicone water-based technical fabric sofa fabric.

[0005] The first object of the present invention is to provide an organic silicone water-based technical fabric sofa fabric, which is specifically as follows: the organic silicone water-based technical fabric sofa fabric comprises: a non-woven fabric and an organic silicone water-based polyurethane coating.

[0006] In one embodiment, the nonwoven fabric is made of 100% polyester fibers, wherein the fiber fineness is 25 to 37 tex, preferably 32 to 37 tex.

[0007] In one embodiment, the silicone waterborne polyurethane coating comprises the following components in weight percentage: 10% to 15% of polyethylene glycol, 5% to 10% of isophorone diisocyanate, 5% to 10% of 2,2-dihydroxymethylpropionic acid, 2% to 5% of ethylenediamine chain extender, 1% to 5% of defoaming agent, 2% to 4% of co-surfactant, 1% to 3% of dispersant, and 5% to 6% of silicone modified corn starch.

[0008] In one embodiment, the preparation process of the organosilicon-modified corn starch is as follows: polysiloxane and toluene diisocyanate are heated to 60°C and reacted in an acetone solution for 3 hours. During the reaction, the characteristic peak of the isocyanate (NCO) group of toluene diisocyanate is detected by FT-IR to ensure that the NCO group is completely reacted. The obtained isocyanate-terminated siloxane and corn starch are heated to 60°C and reacted for 48 hours to obtain an organosilicon-modified starch suspension. The product is repeatedly washed with acetone. After centrifugation and filtration, it is dried in an oven at 80°C to obtain an organosilicon-modified starch powder. The organosilicon-modified starch powder is sealed and stored.

[0009] In one embodiment, in the organic silicone waterborne polyurethane coating provided by the present invention, the co-surfactant includes one or a combination of alkylphenol ethoxylates, ethylene oxide copolymers, propylene oxide copolymers, amine alkoxides and fatty acid alkoxides.

[0010] In one embodiment, in the organosilicon waterborne polyurethane coating provided by the present invention, the defoaming agent is polyoxyethylene polyoxypropanolamine ether, and the dispersant is polyvinyl alcohol and / or polyvinyl ether.

[0011] The second object of the present invention is to provide a method for preparing a water-based silicone technical fabric sofa fabric, comprising the following steps:

[0012] (1) Preparation of silicone waterborne polyurethane coating

[0013] Polyethylene glycol, isophorone diisocyanate, 2,2-dimethylolpropionic acid and a small amount of n-methylpyrrolidone were added to a four-necked flask equipped with a reflux condenser, a thermometer and a mechanical stirring device. The temperature was raised to 80°C and stirred at 300 rpm for 50 minutes under nitrogen atmosphere. After that, an appropriate amount of organosilicon-modified corn starch was added and stirring continued for 30 minutes. Then triethanolamine was added and the carboxylic acid in 2,2-dimethylolpropionic acid was neutralized at 50°C, and a small amount of acetone was injected into the mixture to reduce the viscosity during the process. When cooled to room temperature, the polyurethane prepolymer was dispersed in deionized water and stirred vigorously for 1h. Subsequently, ethylenediamine was added for 30min of back chain extension. Finally, acetone was removed from the mixture by a rotary evaporator. Then, a defoamer, a surfactant and a dispersant were added to the organosilicon-modified WPU solution and ultrasonically stirred to obtain a silicone waterborne polyurethane coating.

[0014] (2) Preparation of silicone water-based technical fabric sofa fabric

[0015] The organic silicon water-based polyurethane coating obtained in step (1) is evenly coated on the polyester non-woven fabric, and finally dried at 80° C. to obtain an organic silicon water-based technical fabric sofa fabric.

[0016] Advantages and effects of the present invention:

[0017] The invention provides a method for preparing an environmentally friendly organic silicon water-based technical cloth sofa fabric. While ensuring the original performance of the sofa fabric, organic silicon-modified corn starch is used to improve the water resistance of the sofa fabric. The processing method of the invention is simple to operate, convenient and fast to process, and has strong applicability.

[0018] The organic silicon waterborne polyurethane coating prepared by the invention contains the following components in weight percentage: 10% to 15% of polyethylene glycol, 5% to 10% of isophorone diisocyanate, 5% to 10% of 2,2-dihydroxymethyl propionic acid, 2% to 5% of ethylenediamine chain extender, 1% to 5% of defoamer, 2% to 4% of surfactant, 1% to 3% of dispersant, and 5% to 6% of organic silicon modified corn starch. By controlling key components and proportions, the coating has good water resistance and strong hydrophobicity. The water contact angle reaches 152° and has good water washing fastness. After 100 times of water washing, the contact angle is still 135°. Meanwhile, the organic silicon modified polyurethane technology fabric has good mechanical properties and can withstand a tensile force of 10MPa, thus meeting the strength requirements of non-woven fabrics for sofas. DETAILED DESCRIPTION

[0019] Test method:

[0020] 1. Thermal stability

[0021] International standard ISO / DIS 4879 "Determination of thermal resistance of textiles (unmelted)".

[0022] 2. Mechanical properties

[0023] Taking GB / T 3923.1 as reference standard, test the tensile strength of the specimen.

[0024] 3. Water resistance

[0025] The water contact angle of the sample was tested using a contact angle meter. The water drop size was 5 μL. The test was performed after stabilization for 30 seconds. The average value was taken after 5 measurements at different positions.

[0026] Embodiment 1:

[0027] Polyester non-woven fabric is selected as the base fabric. The organic silicone water-based polyurethane coating in this embodiment includes the following components by weight percentage: 10% polyethylene glycol, 8% isophorone diisocyanate, 10% 2,2-dimethylol propionic acid, 5% ethylenediamine chain extender, 5% defoamer, 2% co-surfactant, 1% dispersant, 5% corn starch, 6% polysiloxane, 5% toluene diisocyanate, and the balance is deionized water.

[0028] The preparation method is as follows: first, the surface of corn starch is modified with hydroxyl-terminated polysiloxane, and the modified corn starch is compounded into waterborne polyurethane to form a hydrophobic coating, wherein the silicone-modified starch is prepared by using polysiloxane, toluene diisocyanate and starch. Then: polyethylene glycol, isophorone diisocyanate, 2,2-dihydroxymethyl propionic acid and a small amount of n-methyl pyrrolidone are added to a four-necked flask equipped with a reflux condenser, a thermometer and a mechanical stirring device. The temperature is raised to 80°C and stirred at 300 rpm for 50 minutes under the protection of a nitrogen atmosphere. After that, an appropriate amount of silicone-modified corn starch is added and stirring is continued for 30 minutes. Then TEA is added and the carboxylic acid in DMPA is neutralized at 50°C, and a small amount of acetone is injected into the mixture to reduce the viscosity during the process. When cooled to room temperature, the polyurethane prepolymer is dispersed in deionized water and stirred vigorously for 1 hour. Subsequently, EDA is added for 30 minutes of back chain extension. Finally, acetone is removed from the mixture by a rotary evaporator. Then, a defoamer, a surfactant and a dispersant are added to the organosilicon-modified WPU solution and ultrasonically stirred to be uniform, and then evenly coated on the polyester fiber. Finally, the organosilicon-modified polyurethane technology cloth is obtained by drying at 80°C.

[0029] Embodiment 2:

[0030] Polyester non-woven fabric is selected as the base fabric. The organic silicone water-based polyurethane coating in this embodiment includes the following components by weight percentage: 15% polyethylene glycol, 7% isophorone diisocyanate, 9% 2,2-dimethylol propionic acid, 6% ethylenediamine chain extender, 6% defoamer, 3% co-surfactant, 2% dispersant, 6% corn starch, 8% polysiloxane, 6% toluene diisocyanate, and the balance is deionized water.

[0031] The preparation method is as follows: first, the surface of corn starch is modified with hydroxyl-terminated polysiloxane, and the modified corn starch is compounded into waterborne polyurethane to form a hydrophobic coating, wherein the silicone-modified starch is prepared by using polysiloxane, toluene diisocyanate and starch. Then: polyethylene glycol, isophorone diisocyanate, 2,2-dihydroxymethyl propionic acid and a small amount of n-methyl pyrrolidone are added to a four-necked flask equipped with a reflux condenser, a thermometer and a mechanical stirring device. The temperature is raised to 80°C and stirred at 300 rpm for 50 minutes under the protection of a nitrogen atmosphere. After that, an appropriate amount of silicone-modified corn starch is added and stirring is continued for 30 minutes. Then TEA is added and the carboxylic acid in DMPA is neutralized at 50°C, and a small amount of acetone is injected into the mixture to reduce the viscosity during the process. When cooled to room temperature, the polyurethane prepolymer is dispersed in deionized water and stirred vigorously for 1 hour. Subsequently, EDA is added for 30 minutes of back chain extension. Finally, acetone is removed from the mixture by a rotary evaporator. Then, a defoamer, a surfactant and a dispersant are added to the organosilicon-modified WPU solution and ultrasonically stirred to be uniform, and then evenly coated on the polyester fiber. Finally, the organosilicon-modified polyurethane technology cloth is obtained by drying at 80°C.

[0032] Embodiment 3:

[0033] Polyester non-woven fabric is selected as the base fabric. The organic silicone water-based polyurethane coating in this embodiment includes the following components by weight percentage: 18% polyethylene glycol, 8% isophorone diisocyanate, 9% 2,2-dimethylol propionic acid, 6% ethylenediamine chain extender, 4% defoamer, 3% co-surfactant, 2% dispersant, 5% corn starch, 6% polysiloxane, 5% toluene diisocyanate, and the balance is deionized water.

[0034] The preparation method is as follows: first, the surface of corn starch is modified with hydroxyl-terminated polysiloxane, and the modified corn starch is compounded into waterborne polyurethane to form a hydrophobic coating, wherein the silicone-modified starch is prepared by using polysiloxane, toluene diisocyanate and starch. Then: polyethylene glycol, isophorone diisocyanate, 2,2-dihydroxymethyl propionic acid and a small amount of n-methyl pyrrolidone are added to a four-necked flask equipped with a reflux condenser, a thermometer and a mechanical stirring device. The temperature is raised to 80°C and stirred at 300 rpm for 50 minutes under the protection of a nitrogen atmosphere. After that, an appropriate amount of silicone-modified corn starch is added and stirring is continued for 30 minutes. Then TEA is added and the carboxylic acid in DMPA is neutralized at 50°C, and a small amount of acetone is injected into the mixture to reduce the viscosity during the process. When cooled to room temperature, the polyurethane prepolymer is dispersed in deionized water and stirred vigorously for 1 hour. Subsequently, EDA is added for 30 minutes of back chain extension. Finally, acetone is removed from the mixture by a rotary evaporator. Then, a defoamer, a surfactant and a dispersant are added to the organosilicon-modified WPU solution and ultrasonically stirred to be uniform, and then evenly coated on the polyester fiber. Finally, the organosilicon-modified polyurethane technology cloth is obtained by drying at 80°C.

[0035] In combination with Examples 1-3, it can be seen that the method of the present invention can effectively prepare silicone water-based technical fabric sofa fabrics. The prepared silicone modified polyurethane technical fabrics are tested for thermal stability, mechanical properties, and water resistance. The results are shown in Table 1. The silicone modified polyurethane technical fabrics prepared in Examples 1-3 have good thermal stability, mechanical properties, and water resistance.

[0036] Table 1

[0037]

[0038]

[0039] Optimization Example 1: Effect of the content of polyethylene glycol in the formula on the effect of silicone-modified polyurethane technical fabric

[0040] Except for changing the amount of polyethylene glycol (9%, 10%, 15%, 18%, 20%), the other steps are consistent with Example 1, and the prepared silicone modified polyurethane technology cloth is tested for thermal stability, mechanical properties, and water resistance. The results are shown in Table 2:

[0041] Table 2

[0042]

[0043] From Table 2, it can be seen that when the content of polyethylene glycol is 10% to 18%, the water contact angle reaches above 149°, and after 100 times of water washing, the water contact angle reaches above 133°, and the tensile force reaches above 9.8MPa, without melting, and the thermal stability is good. Optimization Example 2: The influence of the content of organosilicon-modified corn starch in the formula on the effect of organosilicon-modified polyurethane technology cloth

[0044] Except for changing the amount of organosilicon-modified corn starch (4%, 5%, 6%, 7%), the other steps were consistent with Example 1, and the prepared organosilicon-modified polyurethane technical fabric was tested for thermal stability, mechanical properties, and water resistance. The results are shown in Table 3:

[0045] Table 3

[0046]

[0047]

[0048] It can be seen from Table 3 that when the content of silicone-modified corn starch is 5% to 6%, the water contact angle reaches above 150°, and after 100 water washes, the water contact angle reaches above 133°, and the tensile force reaches above 9.8 MPa, without melting, and the thermal stability is good.

[0049] Optimization Example 3: Effect of the content of ethylenediamine chain extender in the formula on the effect of silicone-modified polyurethane technical fabric

[0050] Except for changing the amount of ethylenediamine chain extender (1%, 2%, 5%, 6%, 8%), the other steps are consistent with Example 1, and the prepared silicone modified polyurethane technology fabric is tested for thermal stability, mechanical properties, and water resistance. The results are shown in Table 4:

[0051] Table 4

[0052]

[0053] It can be seen from Table 4 that when the content of ethylenediamine chain extender is 2% to 6%, the water contact angle reaches more than 150°, and after 100 water washings, the water contact angle reaches more than 132°, the tensile force reaches more than 9.8MPa, it does not melt, and the thermal stability is good.

[0054] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A silicone water-based technical fabric sofa fabric, characterized in that: The organic silicon water-based technical fabric sofa fabric includes: non-woven fabric and organic silicon water-based polyurethane coating; The organic silicon waterborne polyurethane coating comprises the following components in weight percentage: 10% to 15% polyethylene glycol, 5% to 10% isophorone diisocyanate, 5% to 10% 2,2-dihydroxymethyl propionic acid, 2% to 5% ethylenediamine chain extender, 1% to 5% defoamer, 2% to 4% co-surfactant, 1% to 3% dispersant, and 5% to 6% organic silicon modified corn starch; The preparation process of the organosilicon-modified corn starch is as follows: Polysiloxane and toluene diisocyanate were heated to 60°C and reacted in an acetone solution for 3 hours; during the reaction, the characteristic peak of the isocyanate (NCO) group of toluene diisocyanate was detected by FT-IR to ensure that the NCO group was completely reacted; the obtained hydroxyl-terminated polysiloxane and corn starch were heated to 60°C and reacted for 48 hours to obtain a silicone-modified starch suspension; the product was repeatedly washed with acetone; after centrifugation and filtration, it was dried in an oven at 80°C to obtain a silicone-modified starch powder.

2. The organic silicone water-based technical fabric sofa fabric according to claim 1, characterized in that: The non-woven fabric is made of 100% polyester fiber, wherein the fineness of the polyester fiber is 25-37 tex.

3. The organic silicone water-based technical fabric sofa fabric according to claim 2, characterized in that: The fineness of polyester fiber is 32~37tex.

4. The organic silicone water-based technical fabric sofa fabric according to claim 1, characterized in that: The co-surfactant is an alkylphenol ethoxylate.

5. The organic silicone water-based technical fabric sofa fabric according to claim 1, characterized in that: The defoamer is polyoxyethylene polyoxypropanolamine ether, and the dispersant is polyvinyl alcohol and / or polyvinyl ether.

6. A method for preparing the organic silicone water-based technical fabric sofa fabric according to claim 1, characterized in that: The steps include: (1) Preparation of silicone waterborne polyurethane coating: Polyethylene glycol, isophorone diisocyanate, 2,2-dihydroxymethylpropionic acid and a small amount of n-methylpyrrolidone are added to a four-necked flask equipped with a reflux condenser, a thermometer and a mechanical stirring device; the temperature is raised to 80°C, and stirred at a speed of 300 rpm for 50 minutes under the protection of a nitrogen atmosphere; then, an appropriate amount of organosilicon-modified corn starch is added and stirring is continued for 30 minutes; then triethanolamine is added and the carboxylic acid in 2,2-dihydroxymethylpropionic acid is neutralized at 50°C, and a small amount of acetone is injected into the mixture to reduce the viscosity during the process; when cooled to room temperature, the polyurethane prepolymer is dispersed in deionized water and stirred vigorously for 1 hour; then, ethylenediamine is added for 30 minutes of back chain extension; finally, acetone is removed from the mixture by a rotary evaporator; then a defoamer, a surfactant and a dispersant are added to the organosilicon-modified WPU solution and ultrasonically stirred to obtain an organosilicon waterborne polyurethane coating; (2) Preparation of silicone water-based technical fabric sofa fabric: The organic silicone water-based polyurethane coating obtained in step (1) is evenly coated on the polyester non-woven fabric, and finally dried at 80° C. to obtain an organic silicone water-based technical fabric sofa fabric.

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