阅读说明：本技术 一种含超支化聚合物的无卤水性纺织阻燃涂层组合物、制备方法和阻燃织物 (Hyperbranched polymer-containing halogen-free water-based textile flame-retardant coating composition, preparation method and flame-retardant fabric ) 是由 汪少锋 王泽武 董勇 于 2020-12-31 设计创作，主要内容包括：本发明公开了一种含超支化聚合物的无卤水性纺织阻燃涂层组合物,所述组合物包含成膜剂、疏水改性乳液、含磷阻燃剂、超支化成碳剂、氢氧化铝、水性涂料助剂和水。所述含磷阻燃剂包含无机含磷阻燃剂和有机磷酸酯阻燃剂,所述疏水改性乳液选自有机硅改性的丙烯酸聚酯乳液和聚氨酯改性的丙烯酸聚酯乳液。该阻燃涂层组合物耐水好,阻燃效果好。(The invention discloses a hyperbranched polymer-containing halogen-free water-based textile flame-retardant coating composition which comprises a film-forming agent, a hydrophobic modified emulsion, a phosphorus-containing flame retardant, a hyperbranched carbon-forming agent, aluminum hydroxide, a water-based coating auxiliary agent and water. The phosphorus-containing flame retardant comprises an inorganic phosphorus-containing flame retardant and an organic phosphate ester flame retardant, and the hydrophobic modified emulsion is selected from organosilicon modified acrylic polyester emulsion and polyurethane modified acrylic polyester emulsion. The flame-retardant coating composition has good water resistance and good flame-retardant effect.)

1. A hyperbranched polymer-containing halogen-free water-based textile flame-retardant coating composition is characterized by comprising the following raw materials in percentage by weight:

15-40 parts of film forming agent, 5-15 parts of hydrophobic modified emulsion, 10-30 parts of phosphorus-containing flame retardant, 3-15 parts of hyperbranched char forming agent, 1-5 parts of aluminum hydroxide, 0.5-10 parts of water-based paint auxiliary agent consisting of dispersing emulsifier, thickening agent, antifreezing agent, film forming auxiliary agent and pH regulator, and 20-50 parts of water.

2. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 1, wherein: the film forming agent is ethylene-vinyl acetate copolymer emulsion or acrylic acid polyester copolymer emulsion or a mixture of the two in any proportion.

3. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 1, wherein: the hyperbranched carbon forming agent is a water-insoluble hyperbranched carbon forming agent.

4. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 3, wherein: the hyperbranched carbon forming agent is selected from hyperbranched triazine carbon forming agent or polyester resin with hydroxyl functional groups, dendritic structures, hyperbranched structures and 3D structures or a mixture of the two in any proportion.

5. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 4, wherein: the dendritic hyperbranched polyester resin with the hydroxyl functional group and the 3D structure is selected from one or a mixture of more than two of first-generation hyperbranched hydroxyl polyester, second-generation hyperbranched hydroxyl polyester, third-generation hyperbranched hydroxyl polyester and fourth-generation hyperbranched hydroxyl polyester in any proportion.

6. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 1, wherein: the hydrophobic modified emulsion is selected from organosilicon modified acrylic polyester emulsion or polyurethane modified acrylic polyester emulsion or a mixture of the two in any proportion.

7. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 1, wherein: the phosphorus-containing flame retardant is a mixture of an inorganic phosphorus-containing flame retardant and an organic phosphate flame retardant in any proportion.

8. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 7, wherein: the inorganic phosphorus-containing flame retardant is hydrophobically modified and wrapped ammonium polyphosphate, and is selected from one or a combination of more than two of modified ammonium polyphosphate wrapped by melamine resin, modified ammonium polyphosphate wrapped by silica gel, modified ammonium polyphosphate wrapped by polyurethane, modified ammonium polyphosphate wrapped by urea-formaldehyde resin and modified ammonium polyphosphate wrapped by epoxy resin in any proportion.

9. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 7, wherein: the organic phosphate flame retardant is cyclic phosphate.

10. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 9, wherein: the cyclic phosphate is selected from one or a combination of more than two of FRC-1, pentaerythritol phosphate and methyl phosphonic acid (5-ethyl-2-methyl-2-oxo-1, 3, 2-dioxaphosphorinane-5-yl) methyl ester in any proportion.

11. The hyperbranched polymer-containing halogen-free aqueous textile flame retardant coating composition of claim 1, wherein: the dispersing emulsifier is isomeric dodecyl alcohol polyoxyethylene ether, the antifreeze agent is propylene glycol, the coalescing agent is dodecyl alcohol ester, the pH regulator is AMP-95, and the thickener is a combination of hydroxyethyl cellulose and associative polyurethane thickener in any proportion.

12. The preparation method of the halogen-free water-based textile flame-retardant coating composition containing the hyperbranched polymer is characterized by comprising the following steps: adding water and a dispersing emulsifier into a dispersion kettle, stirring and mixing, then adding a phosphorus-containing flame retardant, a hyperbranched char forming agent, a hydrophobic modified emulsion, a film forming agent, a film forming assistant, aluminum hydroxide and an antifreeze agent, fully stirring and dispersing to ensure that the particle diameter of the dispersion liquid is less than 3 mu m, then adding a thickening agent and a pH regulator to adjust the viscosity and the pH value, fully stirring, and finally filtering to obtain a finished product.

13. A flame retardant textile fabric characterized by: the flame-retardant textile fabric is obtained by coating the halogen-free water-based textile flame-retardant coating composition containing the hyperbranched polymer on the textile.

Technical Field

The invention relates to a hyperbranched polymer-containing halogen-free water-based textile flame-retardant coating composition, a preparation method thereof and a textile fabric made of the same.

Background

The textile is an indispensable part in daily life of people, and is widely used in the fields of curtains, cloth, furniture, automotive interior, toys, packaging materials and the like. Fire accident investigation shows that: a considerable part of the fire is caused by textiles and upholstery. China is the largest textile manufacturer in the world, and the total amount of textile export in China in 2013 reaches 2841 billion dollars. In recent years, the flame retardance of textiles, particularly novel green and environment-friendly flame-retardant textiles, has gradually become a mandatory standard requirement for high-rise buildings, public places, large airplanes, high-speed rails and the like. GB 20286-2006 public place flame retardant products and component combustion performance requirements and marks in China are mandatory national standards, and the requirements for flame retardance of textiles are also included. The general and special technical conditions of Oeko-Tex Standard 100 and the detection program of Oeko-Tex Standard 200, which are the international certification of ecological textiles, also have strict regulations on flame retardants applied to textiles. In recent years, in the field of textiles, the water-based flame-retardant coating adhesive realizes the replacement of the solvent-based flame-retardant coating adhesive on a plurality of fabrics. Compared with solvent-based flame-retardant coating adhesives, the water-based flame-retardant coating adhesive has the advantages of easy dilution, easy coating, no combustion and explosion risks, low VOC (volatile organic compounds) in processing, easy control of rheological property, easy cleaning and the like in application, and is also accepted by the market. The rising of the water-based flame-retardant coating adhesive accords with the development direction of national energy conservation, emission reduction and clean production.

The most effective flame retardant coating pastes currently used are still antimony bromide based systems. The bromine antimony type flame retardant system has excellent performance in gas phase flame retardant and high performance-price ratio, and is popular. Antimony, such as the most commonly used antimony oxide, is added into the brominated flame retardant to realize the synergistic effect of the antimony bromide, so that the flame retardant efficiency of the flame retardant system can be greatly improved, and the using amount of the flame retardant is reduced. Although halogen-based flame retardants have many excellent properties, high polymers containing the flame retardants release a large amount of smoke and toxic and corrosive gases (hydrogen halide gases) during combustion, and partially undergo thermal decomposition to form carcinogens of polyhalogenated dibenzodioxanes and polyhalogenated dibenzofurans. Various bromine-containing organic compounds are bioaccumulative, can affect the nervous system, the immune system and the reproductive system of organisms, and are global environmental pollutants. At the same time, the safety of antimony, such as antimony oxide, has become a serious environmental safety issue, and in some applications, the use of antimony oxide is being limited. The eight major heavy metals restricted by the European Union EN71-3 also include antimony.

The intumescent composite flame retardant system replaces a bromine-antimony type flame retardant and is a novel composite flame retardant which is widely concerned in the field of national flame retardance in recent years. The intumescent composite flame retardant adopts an acid source, a carbon source and a gas source to realize synergistic flame retardance, and is a classic synergistic combination in the field of flame retardance. The intumescent flame retardant system can realize high-efficiency char formation flame retardance through condensed phase flame retardance. A compact porous foam carbon layer is formed on the surface of the fabric, so that the further degradation of the inner high polymer and the release of combustible materials to the surface can be prevented, the transmission of a heat source to the high polymer can be prevented, and an oxygen source is isolated, so that the spread and the propagation of flame can be prevented. Although the intumescent flame retardant has the advantages of no halogen, low smoke, low toxicity, molten drop prevention and no corrosive gas, the intumescent flame retardant is inferior to a bromine-antimony flame retardant system in the aspects of flame retardant efficiency, water washing resistance and the like.

At present, a halogen-free textile aqueous flame-retardant coating system which integrates or partially integrates the advantages of a bromine-antimony flame-retardant system and a phosphorus-nitrogen flame-retardant system and overcomes the defects of the bromine-antimony flame-retardant system and the phosphorus-nitrogen flame-retardant system is urgently needed in the market.

Disclosure of Invention

The invention aims to provide a hyperbranched polymer-containing halogen-free water-based textile flame-retardant coating composition, which comprises the following raw materials in parts by weight:

15-40 parts of film forming agent, 5-15 parts of hydrophobic modified emulsion, 10-30 parts of phosphorus-containing flame retardant, 3-15 parts of hyperbranched char forming agent, 1-5 parts of aluminum hydroxide, 0.5-10 parts of water-based paint auxiliary agent consisting of dispersing emulsifier, thickening agent, antifreezing agent, film forming auxiliary agent and pH regulator, and 20-50 parts of water.

The film forming agent is ethylene-vinyl acetate copolymer emulsion or acrylic acid polyester copolymer emulsion or a mixture of the two in any proportion.

The carbon forming agent is a water-insoluble hyperbranched carbon forming agent.

Most of traditional carbon forming agents are of small molecular structures, such as pentaerythritol, dipentaerythritol and the like, wherein Pentaerythritol (PER) is a compound with strong polarity, is dissolved in water, has poor water resistance and durability in the using process, and is easy to migrate to the surface of a substrate, so that the performance of the flame-retardant coating adhesive is deteriorated. Therefore, in order to overcome the defects of the small-molecular charring agent, the invention introduces a hyperbranched charring agent with a macromolecular structure. For example, the hyperbranched hydroxyl polyester char forming agent is formed by a plurality of functional group monomers through polymerization reaction, has large molecular weight, large carbon content, simple synthesis, realization of industrial production, obviously lower cost than other macromolecular char forming agents, good char forming effect, overcomes the defects of poor water resistance and easy migration of common char forming agents, and has the advantages of high decomposition temperature, good compatibility, no exudation, good flame retardant property and the like, so the hyperbranched hydroxyl polyester char forming agent has great practicability as the char forming agent.

The hyperbranched carbon forming agent is selected from hyperbranched triazine carbon forming agent or dendritic, hyperbranched and 3D structure polyester resin with hydroxyl functional groups or a mixture of the two in any proportion.

The hyperbranched triazine charring agent selected by the invention has the following chemical structure (the synthesis method adopts the method of the patent with the application publication number CN 103333336A):

。

the dendritic hyperbranched polyester resin with a 3D structure and hydroxyl functional groups is selected from one or a mixture of more than two of first-generation hyperbranched hydroxyl polyester (Boltorn H10), second-generation hyperbranched hydroxyl polyester (Boltorn H20), third-generation hyperbranched hydroxyl polyester (Boltorn H30) and fourth-generation hyperbranched hydroxyl polyester (Boltorn H40) in any proportion. The chemical structures of the first-generation hyperbranched hydroxyl polyester (Boltorn H10), the second-generation hyperbranched hydroxyl polyester (Boltorn H20), the third-generation hyperbranched hydroxyl polyester (Boltorn H30) and the fourth-generation hyperbranched hydroxyl polyester (Boltorn H40) are respectively shown as the following (1), (2), (3) and (4):

（1）；

（2）；

（3）；

（4）。

in the aqueous flame-retardant coating of textiles, most of the traditional aqueous acrylic emulsion has the advantages of transparency, glossiness, initial viscosity, weather resistance and low cost, but the inherent defects of high creep property, poor high and low temperature resistance, easy back adhesion at high temperature and the like limit the application. The unique properties of the polyorganosiloxane are utilized and introduced into a water-based acrylate emulsion system, so that the silicone-acrylate emulsion with excellent properties of the polyorganosiloxane and the water-based acrylate emulsion is prepared, the wet-state and dry-state bonding properties and the storage stability of the water-based acrylic emulsion adhesive can be continuously and obviously improved, the tear strength and the durability of the water-based acrylic emulsion adhesive are improved, the tensile strength is improved, the elongation property is retained, and the water resistance of the flame-retardant coating adhesive is improved. The polyurethane and the polyacrylate have great complementarity in performance, and the aqueous acrylic resin emulsion modified by the polyurethane can organically combine the high wear resistance and good mechanical performance of the polyurethane with the good weather resistance and water resistance of the acrylic acid, thereby increasing the applicability of the aqueous acrylic resin emulsion in the aqueous coating of the textile. The hydrophobically modified emulsion is selected from organosilicon modified acrylic polyester emulsion or polyurethane modified acrylic polyester emulsion or a mixture of the two in any proportion.

The phosphorus-containing flame retardant is a mixture of an inorganic phosphorus-containing flame retardant and an organic phosphate flame retardant in any proportion.

The inorganic phosphorus-containing flame retardant is hydrophobically modified and wrapped ammonium polyphosphate, and is selected from one or a combination of more than two of modified ammonium polyphosphate wrapped by melamine resin, modified ammonium polyphosphate wrapped by silica gel, modified ammonium polyphosphate wrapped by polyurethane, modified ammonium polyphosphate wrapped by urea-formaldehyde resin and modified ammonium polyphosphate wrapped by epoxy resin in any proportion. The melamine modified ammonium polyphosphate (APP-II) is prepared by modifying melamine on the basis of type II ammonium polyphosphate, has high polymerization degree and no formaldehyde, can effectively reduce the hygroscopicity of a flame retardant, reduce the viscosity in a solution, improve the heat resistance, increase the compatibility of a flame retardant system with polymers and resins, and obviously improve the flame retardant efficiency and the water resistance.

The organic phosphate flame retardant is cyclic phosphate.

The cyclic phosphate ester is selected from one or a combination of more than two of FRC-1 (Changzhou chemical research institute), pentaerythritol phosphate ester and methyl phosphonic acid (5-ethyl-2-methyl-2-oxo-1, 3, 2-dioxaphosphorinane-5-yl) methyl ester in any proportion. The chemical structure of FRC-1 of the institute of Hexas chemical engineering is as follows:

the invention adopts aluminum hydroxide as a synergist of a halogen-free P-N expansion system. Researches show that when hydrogen and oxygen are added, the flame retardant property of the halogen-free P-N expansion system is improved, the average after-burning time is reduced to some extent, and the smoke quantity is reduced. It is probably that the aluminum hydroxide is decomposed to absorb the heat on the surface of the combustion object when being heated, and simultaneously releases a large amount of moisture to dilute the oxygen on the surface of the fabric, and the active alumina generated by decomposition is attached to the surface of the combustible object to further prevent the combustion from being carried out. The decomposition product of the aluminum hydroxide can absorb smoke while resisting flame, so the smoke quantity is reduced.

The water-based paint auxiliary agent comprises a dispersing emulsifier, a thickening agent, an antifreezing agent, a film-forming auxiliary agent and a pH regulator; the dispersing emulsifier is isomeric dodecyl alcohol polyoxyethylene ether, the antifreeze agent is propylene glycol, the coalescing agent is dodecyl alcohol ester, the pH regulator is AMP-95, and the thickener is a combination of hydroxyethyl cellulose and associative polyurethane thickener in any proportion.

The cellulose thickener has long use history and many varieties, and has the advantages of high thickening efficiency and the defects of poor water resistance, easy microbial degradation, mildewing and smelling, strong triggering property after the thickening of the system and poor leveling property. As a cellulose-based thickener, hydroxyethyl cellulose (HEC) and the like are generally used.

Polyacrylic acid thickeners, also known as alkali swelling thickeners (ASE), are typically emulsions prepared from (meth) acrylic acid and ethyl acrylate by certain polymerization. Its advantages are high compactness of coated film, and preventing the coated film from sagging and settling. The disadvantages are pH sensitivity and poor water resistance.

The polyurethane thickener (HEUR) is a hydrophobic group modified ethoxy polyurethane water-soluble polymer, belonging to nonionic associative thickeners. HEUR is composed of three parts of hydrophobic group, hydrophilic chain and polyurethane group. The hydrophobic groups act as associations and are the determining factor for thickening, and the hydrophilic chains provide chemical stability and viscosity stability. HEUR has the advantages of insensitivity to PH, good leveling property and good water resistance.

The thickener is the combination of hydroxyethyl cellulose and associative polyurethane thickener in any proportion. Inorganic phosphorus-containing flame retardants, such as ammonium polyphosphate, are partially acidic after being dissolved due to their high water solubility, and affect the stability of the pH of the system, so when an acrylic acid-based alkali thickener is used, the aqueous coating system has the disadvantages of sensitivity to the pH, poor water resistance, easy delamination, and the like. The invention adopts the combination of the associative polyurethane thickener and the cellulose thickener to reduce the sensitivity of the system to water and pH and jointly adjust the rheological property of the aqueous coating adhesive.

The preparation method of the hyperbranched polymer-containing halogen-free water-based textile flame-retardant coating composition provided by the invention comprises the following steps: adding water and a dispersing emulsifier into a dispersion kettle, stirring and mixing, then adding a phosphorus-containing flame retardant, a hyperbranched char forming agent, a hydrophobic modified emulsion, a film forming agent, a film forming assistant, aluminum hydroxide and an antifreeze agent, fully stirring and dispersing to ensure that the particle diameter of the dispersion liquid is less than 3 mu m, then adding a thickening agent and a pH regulator to adjust the viscosity and the pH value, fully stirring, and finally filtering to obtain a finished product.

The invention provides a flame-retardant textile fabric, which is prepared by coating a halogen-free aqueous textile flame-retardant coating composition containing a hyperbranched polymer on a textile. The textile fabric is selected from nylon, cotton, polyester fabric and their combination. The flame retardant textile fabric is free of halogen elements.

The hyperbranched polymer-containing halogen-free water-based textile flame-retardant coating composition provided by the invention has good water resistance and good flame-retardant effect.

Detailed Description

The term "halogen-free" or "halogen-free" as used herein, is used in the same sense of the different expressions, and refers to compositions in which no halogen element (including compounds or the like) is specifically added, such that the halogen element is present in the flame retardant composition only as a trace component or as an o.l wt% or less impurity.

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

The main raw materials are as follows:

1. the polymerization degree of the selected modified ammonium polyphosphate (APP-II) is more than 1000, and the selected modified ammonium polyphosphate comprises modified ammonium polyphosphate wrapped by melamine resin, modified ammonium polyphosphate wrapped by silica gel, modified ammonium polyphosphate wrapped by polyurethane, modified ammonium polyphosphate wrapped by urea-formaldehyde resin and modified ammonium polyphosphate wrapped by epoxy resin;

2. the selected carbon forming agent is selected from: pentaerythritol (PER), hyperbranched polyester charring agents boltron H20, boltron H30, boltron H40, hyperbranched triazine charring agents;

3. SYNTHRO-PEL CFF: a VOC and fluorine-free anionic emulsion based on acrylic and polyurethane polymers for improving the water and oil resistance of aqueous coatings;

4. silicone-acrylate emulsion RS-996 AD: an organosilicon modified acrylic emulsion for improving water and oil resistance of water-based paint;

5. the thickener is selected from: hydroxyethyl cellulose (HEC), acrylic alkali thickener 8201 (alkali thickener), associative polyurethane thickener RM8W (roman hass);

6. the cyclic phosphate is selected from: FRC-1, pentaerythritol phosphate, methylphosphonic acid (5-ethyl-2-methyl-2-oxo-1, 3, 2-dioxaphosphorinan-5-yl) methyl ester from the institute of chezhou chemical research;

7. an antifreeze agent: propylene glycol;

8. film-forming auxiliary agent: a decaglycol ester;

9. pH regulator: AMP-95.

Comparative example 1

The flame-retardant coating composition comprises the following raw materials:

ethylene-vinyl acetate copolymer emulsion 35 parts

24 parts of coated modified ammonium polyphosphate

Pentaerythritol 8 parts

0.2 part of hydroxyethyl cellulose

82010.2 parts of acrylic thickener

Decanolate ester 1 part

30.6 parts of water

0.5 part of propylene glycol

0.4 portion of dispersing emulsifier

AMP-950.1 parts.

Example 2

The flame-retardant coating composition comprises the following raw materials:

25 parts of ethylene-vinyl acetate copolymer emulsion

Silicone-acrylate emulsion RS-996AD 10 parts

15 parts of coated modified ammonium polyphosphate

Cyclic phosphoric acid ester 7 parts

Boltorn H4010 parts

2 portions of aluminum hydroxide

0.3 part of hydroxyethyl cellulose

Associative polyurethane thickener 1 part

Decanolate ester 1 part

27.3 portions of water

1 part of propylene glycol

0.3 portion of dispersing emulsifier

AMP-950.1 parts.

Example 3

The flame-retardant coating composition comprises the following raw materials:

acrylic acid copolymer emulsion 27 parts

Silicone-acrylate emulsion RS-996AD 8 parts

16 parts of coated modified ammonium polyphosphate

Cyclic phosphoric acid ester 8 parts

4 parts of hyperbranched triazine charring agent

2 portions of aluminum hydroxide

0.2 part of hydroxyethyl cellulose

Associated polyurethane thickener 1.7 parts

Decanolate ester 1 part

31.1 parts of water

0.5 part of propylene glycol

0.3 portion of dispersing emulsifier

AMP-950.2 shares.

Example 4

The flame-retardant coating composition comprises the following raw materials:

28 parts of acrylic copolymer emulsion

10 parts of SYNTHRO-PEL CFF

15 parts of coated modified ammonium polyphosphate

10 parts of cyclic phosphate

4 parts of hyperbranched triazine charring agent

3 portions of aluminum hydroxide

0.2 part of hydroxyethyl cellulose

2 portions of associative polyurethane thickener

Decanolate ester 1 part

25.8 parts of water

0.5 part of propylene glycol

0.3 portion of dispersing emulsifier

AMP-950.2 shares.

Example 5

The flame-retardant coating composition comprises the following raw materials:

acrylic acid copolymer emulsion 27 parts

Silicone-acrylate emulsion RS-996AD 8 parts

20 parts of coated modified ammonium polyphosphate

Cyclic phosphoric acid ester 5 parts

Hyperbranched triazine charring agent 5 parts

2 portions of aluminum hydroxide

0.2 part of hydroxyethyl cellulose

Associated polyurethane thickener 1.7 parts

Decanolate ester 1 part

29.1 parts of water

0.5 part of propylene glycol

0.3 portion of dispersing emulsifier

AMP-950.2 shares.

The preparation method of the above example is as follows:

adding water and a dispersing emulsifier into a dispersion kettle, stirring and mixing, then adding a phosphorus-containing flame retardant, a hyperbranched char forming agent, a hydrophobic modified emulsion, a film forming agent, a film forming assistant, aluminum hydroxide and an antifreeze agent, fully stirring for dispersion to enable the particle diameter of a dispersion liquid to be less than 3 mu m, then adding a thickening agent and a pH regulator to adjust the viscosity and the pH value, fully stirring, and finally filtering to obtain a finished product, namely the halogen-free water-based textile flame-retardant coating composition containing the hyperbranched polymer.

The physical indexes of the water-based flame-retardant coating composition prepared by the invention are as follows:

appearance: milky white or yellowish viscous liquid;

solid content: 50 +/-10%;

viscosity: 80-130 KU;

pH value: 6.0-9.0.

The aqueous flame retardant coating composition prepared above was applied to glass slides and dried in an oven at 105 degrees for 1 hour, weighing the weight W1. The dried coating composition is put into a warm water bath at 40 ℃ for soaking for 60min, then taken out and dried in an oven at 105 ℃ for 1 hour, and the weight W2 is weighed. The weight loss rate before and after the water-based flame retardant coating composition was foamed was calculated, i.e., = 100 = W1-W2)/W1. Coating each aqueous flame-retardant coating composition formula on 3 glass sheets respectively, calculating the weight loss rate according to the steps, and taking an average value, wherein the result is shown in the following table;

。

the greater the weight loss after soaking in water, the less water resistant the waterborne flame retardant coating composition. Comparative example 1 the weight loss ratio of the halogen-free P-N system is 18.5%, and the water resistance is the worst. Examples 2-5 are the novel halogen-free flame retardant system of the invention, the hydrophobic modified emulsion is adopted, the water-insoluble hyperbranched carbon-forming agent is selected, the poor-water-resistant acrylic acid-base thickening agent is replaced by the associative polyurethane thickening agent, the weight loss rate of the flame retardant adhesive is reduced to 5-6%, and the water resistance is obviously improved.

The flame retardance is tested according to the regulations of GB/T5455-2014 measurement of the damage length and the afterflame time of the textile in the vertical direction of the combustion performance. Selecting the polyester curtain cloth as base cloth, uniformly coating the flame-retardant coating composition on the back of the fabric by using a coating machine, drying for 1-10 minutes by using an oven at 120-200 ℃, and controlling the coating amount of a dry film to be about 40-100g/m 2. Then, a 300X80 mm sample is placed under a specified burner to be ignited by using a vertical method fabric burning performance tester, the flame is stabilized for 30 seconds, 12 seconds after the ignition is started, the flame is removed, and the afterflame time, smoldering time and damage length of the sample are measured. Level Bl: the length of the damaged charcoal is less than or equal to 15cm, the burning time is less than or equal to 5s, and the smoldering time is less than or equal to 5 s. The test results are given in the following table;

as can be seen from the results of the above table: the flame retardant property of the traditional halogen-free P-N system can not reach the flame retardant standard of B1 level. By adopting the halogen-free synergistic system, the hyperbranched carbon forming agent, the cyclic phosphate and the aluminum hydroxide are introduced, so that the flame retardant property of the flame retardant adhesive can be greatly improved and the flame retardant property reaches the flame retardant standard of B1.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical solutions of the present invention in any way. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention fall within the scope of the present invention.