阅读说明：本技术 一种环保阻燃型纺织印花涂料及其制备方法 (Environment-friendly flame-retardant textile printing coating and preparation method thereof ) 是由 陈志越 于 2021-10-11 设计创作，主要内容包括：本发明公开了一种环保阻燃型纺织印花涂料及其制备方法,所述涂料包含粘合剂、交联剂、阻燃剂和催化剂,按重量份数计,所述各成分的重量份分别为：粘合剂45-55份,交联剂20-25份,阻燃剂15-20份,增强纤维1-5份,催化剂8-12份。本发明其组成成分简单且环保,阻燃性能好,氧指数得到显著提升,并且在涂覆于织物表面后可以使得织物具备优异的自熄性,在燃烧过程中发烟量低且无毒。(The invention discloses an environment-friendly flame-retardant textile printing coating and a preparation method thereof, wherein the coating comprises an adhesive, a cross-linking agent, a flame retardant and a catalyst, and the coating comprises the following components in parts by weight: 45-55 parts of adhesive, 20-25 parts of cross-linking agent, 15-20 parts of flame retardant, 1-5 parts of reinforcing fiber and 8-12 parts of catalyst. The flame-retardant fabric is simple in composition, environment-friendly, good in flame retardant property, and capable of obviously improving the oxygen index, and after the flame-retardant flame-.)

1. An environment-friendly flame-retardant textile printing coating is characterized in that: the coating comprises an adhesive, a cross-linking agent, a flame retardant and a catalyst, and the coating comprises the following components in parts by weight: 45-55 parts of adhesive, 20-25 parts of cross-linking agent, 15-20 parts of flame retardant, 1-5 parts of reinforcing fiber and 8-12 parts of catalyst.

2. The environment-friendly flame-retardant textile printing coating according to claim 1, characterized in that: the adhesive is polyurethane.

3. The environment-friendly flame-retardant textile printing coating according to claim 1, characterized in that: the cross-linking agent is at least one of sodium nitrite, trisodium phosphate and disodium hydrogen phosphate.

4. The environment-friendly flame-retardant textile printing coating according to claim 1, characterized in that: the flame retardant is ammonium polyphosphate.

5. The environment-friendly flame-retardant textile printing coating according to claim 1, characterized in that: the reinforcing fiber is at least one of glass fiber, mineral fiber, carbon fiber and high silica fiber.

6. The environment-friendly flame-retardant textile printing coating according to claim 1, characterized in that: the catalyst is at least one of dibutyltin oxide, tributyltin oxide and dibutyltin dilaurate.

7. The preparation method of the environment-friendly flame-retardant textile printing coating is characterized by comprising the following steps:

(1) mixing an adhesive, a cross-linking agent and reinforcing fibers according to parts by weight in the presence of a catalyst, adding a flame retardant, and reacting at 40-90 ℃ for 1-3 h to obtain a polyurethane prepolymer A;

(2) adding a chain extender accounting for 0.5-2.0% of the weight of the polyurethane prepolymer A and a solvent accounting for 30-40% of the weight of the polyurethane prepolymer A into the polyurethane prepolymer A, reacting for 2-5 hours at the temperature of 60-80 ℃, and adding water for emulsification to obtain the coating.

8. The environment-friendly flame-retardant textile printing coating according to claim 7, characterized in that: the solvent is epoxidized soybean oil.

9. The environment-friendly flame-retardant textile printing coating according to claim 7, characterized in that: the chain extender is any one of diphenyl dihydroxy silane, 4' -bis (dimethyl hydroxyl silicon-based) diphenyl ether and 1, 4-bis (dimethyl hydroxyl silicon-based) benzene.

10. The environment-friendly flame-retardant textile printing coating according to claim 7, characterized in that: monitoring is carried out through a monitoring device when the reaction is carried out for 2-5 h at the temperature of 60-80 ℃, and the monitoring device comprises: temperature monitoring module and time monitoring module, the temperature monitoring module includes: the temperature measuring unit acquires the reaction real-time temperature in a container containing the polyurethane prepolymer A and transmits the acquired reaction real-time temperature to the control unit; the control unit analyzes the reaction real-time temperature in real time in combination with the reaction temperature condition to obtain a real-time analysis result, and controls the heating unit and/or the cooling unit according to the real-time analysis result; the temperature rising unit carries out temperature rising work according to the control of the control unit, and the temperature reducing unit carries out temperature reducing work according to the control of the control unit;

when adding water and emulsifying, add water and emulsify through controllable water pump, controllable water pump is connected on the container that holds the reflection material through adjustable switch and output tube, the reflection material is obtained for adding the chain extender that is 0.5 ~ 2.0% of polyurethane prepolymer A weight and the solvent of polyurethane prepolymer A weight 30 ~ 40% to polyurethane prepolymer A weight to polyurethane prepolymer A, after reacting for 2 ~ 5h under the condition of 60 ~ 80 ℃, controllable water pump includes: the intelligent water-saving device comprises a water tank, a fixing device, a water inlet pipe, a water outlet pipe, an intelligent switch, an induction device and a floating ball; the fixing device is used for fixing the intelligent switch at the upper right corner of the water tank, the water inlet pipe is connected to the front surface of the intelligent switch, the water outlet pipe is connected to the bottom of the intelligent switch, the sensing device is arranged in the water tank, the floating ball is placed in the water tank, and the sensing device is connected with the intelligent switch.

Technical Field

The invention belongs to the technical field of textile coatings, and particularly relates to an environment-friendly flame-retardant textile printing coating.

Background

The flame-retardant coating is a characteristic coating which is used on the surface of a flammable base material, can reduce the flammability of the surface of the coated material, retards the rapid spread of fire and is used for improving the fire endurance of the coated material. The flame retardant of the existing flame retardant coating is a halogen flame retardant, the halogen flame retardant can generate toxic and harmful substances such as dioxin and the like in the combustion process, causes environmental pollution and is gradually limited to use, the decomposition temperature of the halogen flame retardant is lower, the smoke generation amount is large, and a large amount of dense smoke can be caused to suffocate people when a fire disaster occurs. The requirements of the flame-retardant technical conditions of the built-in material for the China railway industry standard TB/T3237-2010 motor train unit are as follows: the oxygen index of GB/T5454-1997 textile combustion performance test needs to reach more than 32 percent, the textile fabric of the seat cover of a motor car has flammability, so a flame-retardant coating needs to be coated on the surface of the textile fabric of the seat cover, because the flame-retardant performance of the existing flame-retardant coating is poor, in order to meet the corresponding oxygen index performance requirement, a large amount of flame-retardant coating needs to be coated on the surface of the textile fabric of the seat cover, the weight of the textile fabric of the seat cover is increased, the weight of the motor car is directly increased, and the textile needs to have good self-extinguishing property according to the test requirements in the fire prevention and fire control regulations UIC564-2-1991 of international railway intermodal transportation or railway passenger locomotive vehicles, after the existing flame-retardant coating is coated on the surface of the textile fabric, the flame-retardant coating is difficult to permeate into the textile fiber of the textile fabric of the seat cover, and the requirement that the textile fabric has self-extinguishing property is difficult to meet, therefore, in order to solve the above technical problems, there is a need to research an environment-friendly flame retardant coating with good flame retardant property, no toxicity and low smoke.

Disclosure of Invention

The invention mainly solves the technical problem of providing the environment-friendly flame-retardant textile printing coating and the preparation method thereof, the environment-friendly flame-retardant textile printing coating is simple in composition, environment-friendly, good in flame retardant property, capable of obviously improving the oxygen index, capable of enabling the fabric to have excellent self-extinguishing property after being coated on the surface of the fabric, low in smoke amount and non-toxic in the combustion process.

In order to solve the technical problems, the invention adopts a technical scheme that: the environment-friendly flame-retardant textile printing coating comprises an adhesive, a cross-linking agent, a flame retardant and a catalyst, and comprises the following components in parts by weight: 45-55 parts of adhesive, 20-25 parts of cross-linking agent, 15-20 parts of flame retardant, 1-5 parts of reinforcing fiber and 8-12 parts of catalyst.

Further, the adhesive is polyurethane.

Further, the crosslinking agent is at least one of sodium nitrite, trisodium phosphate and disodium hydrogen phosphate.

Further, the flame retardant is ammonium polyphosphate.

Further, the reinforcing fiber is at least one of glass fiber, mineral fiber, carbon fiber and high silica fiber.

Further, the catalyst is at least one of dibutyltin oxide, tributyltin oxide and dibutyltin dilaurate.

The preparation method of the environment-friendly flame-retardant textile printing coating comprises the following steps:

(1) mixing an adhesive, a cross-linking agent and reinforcing fibers according to parts by weight in the presence of a catalyst, adding a flame retardant, and reacting at 40-90 ℃ for 1-3 h to obtain a polyurethane prepolymer A;

(2) adding a chain extender accounting for 0.5-2.0% of the weight of the polyurethane prepolymer A and a solvent accounting for 30-40% of the weight of the polyurethane prepolymer A into the polyurethane prepolymer A, reacting for 2-5 hours at the temperature of 60-80 ℃, and adding water for emulsification to obtain the coating.

Further, the solvent is epoxidized soybean oil.

Further, the chain extender is any one of diphenyl dihydroxy silane, 4' -bis (dimethylhydroxysilyl) diphenyl ether and 1, 4-bis (dimethylhydroxysilyl) benzene.

Further, the reaction is carried out for 2-5 hours at the temperature of 60-80 ℃ through a monitoring device, and the monitoring device comprises: temperature monitoring module and time monitoring module, the temperature monitoring module includes: the temperature measuring unit acquires the reaction real-time temperature in a container containing the polyurethane prepolymer A and transmits the acquired reaction real-time temperature to the control unit; the control unit analyzes the reaction real-time temperature in real time in combination with the reaction temperature condition to obtain a real-time analysis result, and controls the heating unit and/or the cooling unit according to the real-time analysis result; the temperature rising unit carries out temperature rising work according to the control of the control unit, and the temperature reducing unit carries out temperature reducing work according to the control of the control unit;

when adding water and emulsifying, add water and emulsify through controllable water pump, controllable water pump is connected on the container that holds the reflection material through adjustable switch and output tube, the reflection material is obtained for adding the chain extender that is 0.5 ~ 2.0% of polyurethane prepolymer A weight and the solvent of polyurethane prepolymer A weight 30 ~ 40% to polyurethane prepolymer A weight to polyurethane prepolymer A, after reacting for 2 ~ 5h under the condition of 60 ~ 80 ℃, controllable water pump includes: the intelligent water-saving device comprises a water tank, a fixing device, a water inlet pipe, a water outlet pipe, an intelligent switch, an induction device and a floating ball; the fixing device is used for fixing the intelligent switch at the upper right corner of the water tank, the water inlet pipe is connected to the front surface of the intelligent switch, the water outlet pipe is connected to the bottom of the intelligent switch, the sensing device is arranged in the water tank, the floating ball is placed in the water tank, and the sensing device is connected with the intelligent switch.

The invention has the following beneficial effects:

1. the polyurethane is used as an adhesive, and the prepared flame-retardant coating is coated on the surface of the textile fabric, so that the textile fabric has natural and soft hand feeling;

2. the coating contains flame retardant ammonium polyphosphate, after combustion, combustible substances are separated from a heat source, so that the char forming property of a textile fabric is greatly improved, the oxygen index is remarkably improved, the flame retardant coating is coated on the surface of the textile fabric, when the weight gain of the surface of the fabric reaches 50 g/square meter, the oxygen index of the fabric can reach more than 40%, and when the weight gain of the surface of the fabric reaches 60 g/square meter, the oxygen index of the fabric can reach more than 44%;

3. according to the invention, sodium nitrite, trisodium phosphate and disodium hydrogen phosphate are used as cross-linking agents to cross-link the polymer, so that the defect of low strength of the traditional polyurethane is overcome, and meanwhile, the reactant is chelated, so that the absorption of small molecules is increased, and the released VOC is reduced;

4. the invention adopts the epoxidized soybean oil as the solvent, is relatively environment-friendly and has no discharge of harmful substances.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.

Example 1

The coating of the embodiment comprises 50 parts of polyurethane, 22.5 parts of sodium nitrite, 17.5 parts of ammonium polyphosphate, 10 parts of dibutyltin oxide and 2 parts of glass fiber, and the components are uniformly mixed according to parts by weight to prepare the coating of the invention.

Example 2

The coating of the embodiment comprises 55 parts of polyurethane, 20 parts of trisodium phosphate, 20 parts of ammonium polyphosphate, 8 parts of dibutyltin dilaurate and 4 parts of mineral fibers, and the components are uniformly mixed according to the parts by weight to prepare the coating of the invention.

Example 3

The coating of the embodiment comprises 45 parts of polyurethane, 25 parts of disodium hydrogen phosphate, 15 parts of ammonium polyphosphate, 12 parts of tributyltin oxide and 1 part of carbon fiber, and the components are uniformly mixed according to parts by weight to prepare the coating of the invention.

Example 4

The coating of the embodiment comprises 45 parts of polyurethane, 20 parts of a mixture of sodium nitrite and disodium hydrogen phosphate, 15 parts of ammonium polyphosphate, 8 parts of a mixture of dibutyltin oxide and tributyltin oxide and 3 parts of high silica fibers, and the components are uniformly mixed according to parts by weight to prepare the coating of the invention.

Example 5

The coating of this example comprises 55 parts of polyurethane, 25 parts of a mixture of sodium nitrite, trisodium phosphate and disodium hydrogen phosphate, 20 parts of ammonium polyphosphate, 12 parts of a mixture of dibutyltin oxide, tributyltin oxide and dibutyltin dilaurate, and 5 parts of a mixture of mineral fibers and carbon fibers, and the above components are uniformly mixed in parts by weight to prepare the coating of the invention.

The method of preparing the coating of examples 1-5, comprising the steps of:

(1) mixing an adhesive, a cross-linking agent and reinforcing fibers according to parts by weight in the presence of a catalyst, adding a flame retardant, and reacting at 40-90 ℃ for 1-3 h to obtain a polyurethane prepolymer A;

(2) adding a chain extender accounting for 0.5-2.0% of the weight of the polyurethane prepolymer A and a solvent accounting for 30-40% of the weight of the polyurethane prepolymer A into the polyurethane prepolymer A, reacting for 2-5 hours at the temperature of 60-80 ℃, and adding water for emulsification to obtain the coating.

The solvent is epoxidized soybean oil.

The chain extender is any one of diphenyl dihydroxy silane, 4' -bis (dimethyl hydroxyl silicon-based) diphenyl ether and 1, 4-bis (dimethyl hydroxyl silicon-based) benzene.

The flame retardant coatings prepared in examples 1 to 5 were uniformly coated on the surfaces of fabrics for flame retardant property tests, and commercially available flame retardant coatings (comparative examples 1 to 2) were uniformly coated on the surfaces of fabrics for flame retardant property tests as a control group, and the test results were as follows:

as can be seen from the table above, under the condition that the coating weight gain on the surface of the fabric is the same as that of the existing product, the flame retardant property of the flame retardant coating is far superior to that of the existing product, and the use requirement is met; and the coating coats 60g/m on the surface of the fabric²The flame retardant performance is optimal.

In the preparation method of the coating according to embodiments 1 to 5, the reaction is monitored by a monitoring device at 60 to 80 ℃ for 2 to 5 hours, and the monitoring device includes: temperature monitoring module and time monitoring module, the temperature monitoring module includes: the temperature measuring unit acquires the reaction real-time temperature in a container containing the polyurethane prepolymer A and transmits the acquired reaction real-time temperature to the control unit; the control unit analyzes the reaction real-time temperature in real time in combination with the reaction temperature condition to obtain a real-time analysis result, and controls the heating unit and/or the cooling unit according to the real-time analysis result; the temperature rising unit carries out temperature rising work according to the control of the control unit, and the temperature reduction unit carries out temperature reduction work according to the control of the control unit. When adding a chain extender which is 0.5-2.0% of the weight of the polyurethane prepolymer A and a solvent which is 30-40% of the weight of the polyurethane prepolymer A into the polyurethane prepolymer A for reaction, monitoring the temperature and the time between monitoring devices, ensuring the reaction to be carried out for 2-5 h by a time monitoring module, ensuring the reaction temperature to be within the range of 60-80 ℃ by a temperature monitoring module, when monitoring the temperature by the temperature monitoring module, firstly, acquiring the reaction real-time temperature in a container containing the polyurethane prepolymer A by a temperature measuring unit, and transmitting the reaction real-time temperature to a control unit, wherein the control unit analyzes the reaction according to the following formula:

W_i＝ln{[(m-wt)-y_i]+1}+ln{[y_i-(n+wt)]+1}

in the above formula, W_iRepresents a real-time temperature analysis value of the reaction at the time i of the reaction, y_iThe temperature measurement unit is used for obtaining the real-time reaction temperature when the reaction is carried out for the time i, m is the upper limit of the temperature range and is 80 ℃, n is the lower limit of the temperature range and is 60 ℃, t is the response time of the temperature monitoring module for the real-time reaction temperature, and w is the maximum unit temperature variable of the reaction of adding a chain extender which accounts for 0.5-2.0% of the weight of the polyurethane prepolymer A and a solvent which accounts for 30-40% of the weight of the polyurethane prepolymer A into the polyurethane prepolymer A;

byDetermining the result of the analysis, wherein G_iThe real-time reaction temperature analysis result when the reaction is carried out for i time is shown, s shows that temperature adjustment is needed, and d shows that temperature adjustment is not needed;

reaction real-time temperature analysis result G when the reaction proceeded for i hours_iWhen the temperature is s, the temperature is further increased or decreased by a temperature increasing unit or a temperature decreasing unit, so that the reflecting temperature in the container is always kept within the range of 60-80 ℃.

And when the real-time reaction temperature analysis value of the reaction in the time i is determined, the response time of the temperature monitoring module for the real-time reaction temperature is taken into consideration, so that the condition that the temperature in the container exceeds the range of 60-80 ℃ in the process of responding to the current real-time reaction temperature by the temperature monitoring module is avoided, the reaction process is free from abnormal occurrence, reference is made by taking the maximum unit temperature variable of the reaction as a standard, the accuracy of temperature control is ensured, and the accuracy of the reaction is improved.

When adding water and emulsifying, add water and emulsify through controllable water pump, controllable water pump is connected on the container that holds the reflection material through adjustable switch and output tube, the reflection material is obtained for adding the chain extender that is 0.5 ~ 2.0% of polyurethane prepolymer A weight and the solvent of polyurethane prepolymer A weight 30 ~ 40% to polyurethane prepolymer A weight to polyurethane prepolymer A, after reacting for 2 ~ 5h under the condition of 60 ~ 80 ℃, controllable water pump includes: the intelligent water-saving device comprises a water tank, a fixing device, a water inlet pipe, a water outlet pipe, an intelligent switch, an induction device and a floating ball; the fixing device is used for fixing the intelligent switch at the upper right corner of the water tank, the water inlet pipe is connected to the front surface of the intelligent switch, the water outlet pipe is connected to the bottom of the intelligent switch, the sensing device is arranged in the water tank, the floating ball is placed in the water tank, and the sensing device is connected with the intelligent switch. In the use, advance water piping connection outside water source, water passes through the inlet tube and passes through in intelligent switch is arranged the water tank by the outlet pipe, along with the water liquid level in the water tank risees, make the position of floater rise, gather the position height information of floater through induction system simultaneously, and transmit the position height information who gathers to intelligent switch, intelligent switch is according to position height information when the floater reaches preset height, the interrupt or switch-on inlet tube is connected with the outlet pipe, stop or begin to the water delivery to the water tank. When the water is added for emulsification, the water in the water tank enters the container filled with the reflecting material through the output pipe by the adjustable switch, so that the water is added for emulsification. Make the water that adds when adding water emulsification at every turn all be the isochoric through controllable water pump that adds, thereby make the thin thick degree of the coating that obtains the same, and controllable water pump that adds can also carry out the water injection when the water tank is anhydrous, automatic shutdown water injection when the water tank leaves sufficient water, it is convenient, need not artificial assurance, in addition, when the volume of water is confirmed to position altitude information through the response floater, because the floater is more obvious, can be difficult to make mistakes when the surface of water height changes, thereby improve the accuracy.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification, or any other related technical fields directly or indirectly, are included in the scope of the present invention.