阅读说明：本技术 一种超低能耗建筑耐碱阻燃防水透气剂、膜及其制备方法 (Alkali-resistant flame-retardant waterproof air-permeable agent and film for building with ultra-low energy consumption and preparation method thereof ) 是由 路国忠 于 2020-06-02 设计创作，主要内容包括：本发明涉及一种超低能耗建筑耐碱阻燃防水透气剂、膜及其制备方法。按重量份数计,该防水透气剂配方包括：核壳乳液60～68,丙二醇0.1～1.5,阻燃剂1～10,pH值调节剂0.1～0.5,水20～35。本发明提供的防水透气剂用于超低能耗建筑的耐碱阻燃防水透气膜具有优异的防水透气和耐碱等性能。(The invention relates to an alkali-resistant flame-retardant waterproof air-permeable agent and a film for a building with ultra-low energy consumption and a preparation method thereof. The waterproof air-permeable agent comprises the following components in parts by weight: 60-68 parts of core-shell emulsion, 0.1-1.5 parts of propylene glycol, 1-10 parts of flame retardant, 0.1-0.5 part of pH value regulator and 20-35 parts of water. The waterproof air-permeable agent provided by the invention is used for the alkali-resistant flame-retardant waterproof air-permeable film of the ultra-low energy consumption building, and has excellent waterproof air-permeable and alkali-resistant performances and the like.)

1. The alkali-resistant flame-retardant waterproof air-permeable agent with ultralow energy consumption for the building is characterized by comprising the following components in parts by weight:

2. the waterproof air-permeable agent according to claim 1, characterized in that the formulation comprises, in weight percent:

3. the waterproof breathable agent according to claim 1 or 2, wherein the core-shell emulsion comprises a core/shell structure composite particle polymer prepared by using a polymer with a high glass transition temperature as a core and a polymer with a low film forming temperature as a shell, and is preferably a styrene-acrylic core-shell composite particle polymer.

4. The waterproof air-permeable agent according to claim 3, wherein the styrene-acrylic core-shell composite particle polymer takes polystyrene with a glass transition temperature of 70-90 ℃ as a core and polyacrylate-styrene with a minimum film forming temperature of 0-10 ℃ as a shell; preferably, the glass transition temperature is 80 ℃, and the minimum film forming temperature is 5 ℃; and/or the particle size of the core is 100-200 nm, the thickness of the shell is 30-60 nm, preferably, the particle size of the core is 150nm, and the thickness of the shell is 45 nm.

5. The waterproof breathable agent according to any one of claims 1 to 4, wherein the core-shell emulsion is a styrene-acrylic core-shell emulsion, preferably, the solid content is 50-55%, the glass transition temperature is 70-90 ℃, and the minimum film forming temperature is 0-10 ℃.

6. The waterproof and breathable agent according to any one of claims 1 to 5, wherein the flame retardant is a composite modified flame retardant containing bromine, phosphorus and nitrogen; preferably, the content of bromine in the flame retardant is more than or equal to 78 percent, preferably 80 to 85 percent, the volatile matter is less than or equal to 0.2 percent, preferably 0.1 to 0.15 percent, and the density is 2.0 to 2.6kg/m³；

And/or the pH value regulator is selected from multifunctional amine auxiliary agents, preferably 2-amino-2-methyl-1-propanol.

7. The method for preparing the waterproof air-permeable agent as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:

step 1), mixing and stirring the flame retardant, the propylene glycol and the deionized water to form flame retardant slurry, and then grinding;

step 2), adding the core-shell emulsion, and stirring;

and 3) adding the pH value regulator, stirring and filtering to obtain the product.

8. The method according to claim 7, wherein in the step 1), the stirring speed is 500-700 r/min; stirring for 3-7 min; grinding to fineness less than or equal to 5 μm; grinding for 20-40 min;

and/or in the step 2), the stirring speed is 200-400 r/min; stirring for 10-20 min;

and/or in the step 3), the stirring speed is 100-200 r/min; stirring for 5-10 min; and (4) discharging through a 120-mesh screen.

9. An alkali-resistant flame-retardant waterproof breathable film for construction with ultra-low energy consumption, which is characterized in that the film is prepared by using the waterproof breathable agent of any one of claims 1 to 6 and alkali-resistant glass fiber cloth as raw materials through soaking treatment.

10. The method for preparing the alkali-resistant flame-retardant waterproof breathable film according to claim 9, comprising the following steps: putting alkali-resistant glass fiber cloth into the infiltration container of the waterproof air-permeable agentCarrying out infiltration treatment, and then drying the alkali-resistant glass fiber cloth subjected to the infiltration treatment to obtain the alkali-resistant glass fiber cloth; preferably, the drying temperature is 60-100 ℃, preferably 80 +/-2 ℃, and the drying time is 10-30 min; the coating weight of the waterproof air-permeable agent is 500-700 g/m²The coating thickness is 0.5-1.5 mm.

Technical Field

The invention relates to the technical field of waterproof breathable films, in particular to an alkali-resistant flame-retardant waterproof breathable agent and a film for a building with ultralow energy consumption and a preparation method thereof.

Background

The ultra-low energy consumption building mainly means that an architecture enclosure structure is optimized by adopting an advanced energy-saving design concept and a construction technology, all natural heat obtaining modes such as sun, illumination, human body and electric appliance heat dissipation and a waste heat recovery fresh air system which can be obtained by the building are comprehensively utilized by virtue of superior heat preservation performance and waterproof air tightness of the building, and a building with higher living comfort and lower energy consumption is realized at the same time. The key technology of the ultralow-energy-consumption building comprises five aspects of a good building envelope heat-insulation system, an excellent energy-saving passive door and window system, a heat-bridge-free design, a high-efficiency heat recovery fresh air system, excellent building waterproof air tightness and the like, wherein the passive door and window system is required to be subjected to waterproof air insulation and air permeability treatment. Because, the excellent waterproof and air-permeable performance can avoid indoor dewing and mildewing, and ensure the heat preservation performance and the durability of the maintenance structure.

The waterproof air tightness of the ultra-low energy consumption building meets the requirements mainly by adopting the waterproof breathable film to seal the outer side joint between the door and window opening and the structure of the building. The waterproof breathable film is used outside the door and window joint, is used for waterproof sealing of the door and window joint and is a film-shaped waterproof breathable material for preventing outdoor moisture from permeating and preventing moisture in the joint from being discharged, and comprises a self-adhesive type and a non-self-adhesive type.

The existing waterproof breathable film in the market at present is basically an imported product at abroad, is relatively expensive in price and good in steam-proof performance, but does not have alkali resistance. Because, in building application, generally, a layer of cement leveling mortar is smeared outside the waterproof breathable film for leveling and protection, and the cement leveling mortar is alkaline, the waterproof breathable film with alkali resistance is urgently needed to be provided at present.

Disclosure of Invention

The embodiment of the invention provides an alkali-resistant flame-retardant waterproof breathable agent for a building with ultralow energy consumption, a waterproof breathable film and a preparation method thereof. The alkali-resistant flame-retardant waterproof air-permeable agent for the building with the ultralow energy consumption, provided by the embodiment of the invention, enables the waterproof air-permeable film to have excellent performances such as waterproof air permeability and alkali resistance.

The invention provides an alkali-resistant flame-retardant waterproof air-permeable agent with ultralow energy consumption for buildings, which comprises the following components in parts by weight:

according to some preferred embodiments of the invention, the formulation comprises, in weight percent:

according to some preferred embodiments of the present invention, the core-shell emulsion comprises a composite particle polymer having a core/shell structure prepared by using a polymer with a high glass transition temperature as a core and a polymer with a low film-forming temperature as a shell, and is preferably a styrene-acrylic core-shell composite particle polymer.

According to some preferred embodiments of the present invention, the styrene-acrylic core-shell composite particle polymer has a core of polystyrene having a glass transition temperature Tg of 70 to 90 ℃ and a shell of polyacrylate-styrene having a minimum film forming temperature MFT of 0 to 10 ℃; preferably, the glass transition temperature Tg is 80 ℃ and the minimum film-forming temperature MFT is 5 ℃; and/or the particle size of the core is 100-200 nm, the thickness of the shell is 30-60 nm, preferably, the particle size of the core is 150nm, and the thickness of the shell is 45 nm.

According to some preferred embodiments of the present invention, the core-shell emulsion is a styrene-acrylic core-shell emulsion, preferably, the solid content is 50 to 55%, the glass transition temperature Tg is 70 to 90 ℃, and the minimum film-forming temperature MFT is 0 to 10 ℃.

In the invention, the washing resistance of the waterproof air-permeable agent adhesive film is more than or equal to 2000 times, the tensile strength is more than or equal to 1.0MPa, the breaking elongation of the waterproof air-permeable agent adhesive film is more than or equal to 200% under the standard state (the temperature is 20 ℃ plus or minus 3 ℃ and the humidity is 50 percent plus or minus 10 percent), the breaking elongation of the waterproof air-permeable agent adhesive film is more than or equal to 40 percent under the temperature of minus 10 ℃, and the breaking elongation of the waterproof air-permeable agent adhesive film is.

According to some preferred embodiments of the present invention, the flame retardant is a composite modified flame retardant containing bromine, phosphorus and nitrogen; preferably, the content of bromine in the flame retardant is more than or equal to 78 percent, preferably 80 to 85 percent, the volatile matter is less than or equal to 0.2 percent, preferably 0.1 to 0.15 percent, and the density is 2.0 to 2.6kg/m³Preferably 2.3kg/m³White powder in appearance, excellent thermal stability and withstanding processing temperatures above 250 ℃ according to some preferred embodiments of the present invention, the pH adjusting agent is selected from the group consisting of multifunctional amine aids, preferably 2-amino-2-methyl-1-propanol. According to the invention, the preferable formula components and the dosage are adopted, so that the comprehensive performances of the waterproof breathable film, such as water resistance, air permeability, alkali resistance, mechanics and the like, can be improved.

The invention provides a preparation method of an alkali-resistant flame-retardant waterproof air-permeable agent, which comprises the following steps:

step 1), mixing and stirring a flame retardant, propylene glycol and deionized water to form flame retardant slurry, and then grinding;

step 2), adding the core-shell emulsion, and stirring;

and 3) adding the pH value regulator, stirring and filtering to obtain the product.

According to some preferred embodiments of the invention, in the step 1), the stirring speed is 500-700 r/min, preferably 600 r/min; the stirring time is 3-7 min, preferably 5 min; grinding to fineness less than or equal to 5 μm; preferably, a horizontal sand mill is used for grinding for 20-40 min, and more preferably 30 min; and/or in the step 2), the stirring speed is 200-400 r/min, preferably 300 r/min; the stirring time is 10-20 min, preferably 15 min; and/or in the step 3), the stirring speed is 100-200 r/min, preferably 150 r/min; the stirring time is 5-10 min, preferably 7 min; and (4) discharging through a 120-mesh screen.

The invention also provides an alkali-resistant flame-retardant waterproof breathable film which is prepared by taking the waterproof breathable agent and alkali-resistant glass fiber cloth as raw materials and performing infiltration treatment.

Another aspect of the present invention is to provide a method for preparing the alkali-resistant flame-retardant waterproof breathable film, comprising the following steps: placing the alkali-resistant glass fiber cloth into a wetting container of the waterproof air-permeable agent for wetting treatment, and then drying the alkali-resistant glass fiber cloth after the wetting treatment to obtain the waterproof air-permeable agent; preferably, the drying temperature is 60-100 ℃, preferably 80 +/-2 ℃, and the drying time is 10-30 min; the coating weight of the waterproof air-permeable agent is 500-700 g/m²The coating thickness is 0.5-1.5 mm.

According to some embodiments of the present invention, the method for preparing the alkali-resistant, flame-retardant, waterproof breathable film comprises the following steps: firstly, make intoAdding the prepared waterproof air-permeable agent into an infiltration tank, conveying alkali-resistant glass fiber cloth into the infiltration tank through a roller shaft for infiltration treatment, and enabling the coating weight of the waterproof air-permeable agent to be 500-700 g/m²Coating thickness is 0.5-1.5 mm; and then delivering the soaked alkali-resistant glass fiber cloth into a drying kiln at the temperature of 60-100 ℃, and drying for 10-30 min to prepare the alkali-resistant flame-retardant waterproof breathable film.

The invention has the beneficial effects that: the alkali-resistant flame-retardant waterproof breathable film for the ultra-low energy consumption building has excellent waterproof and breathable properties, and the water impermeability of the film can ensure that no leakage exists at the back of the waterproof breathable film after the water column with the water permeability of more than 1000mm acts for 20 hours; the water vapor permeability is less than 5.0 meters; the alkali-resistant flame-retardant waterproof breathable film has high tensile strength, and the maximum peak tension of the film can reach more than 160N/50mm (longitudinal direction). The alkali-resistant flame-retardant waterproof breathable film has an alkali-resistant effect, the alkali-resistant tensile breaking strength (warp direction and weft direction) is more than or equal to 1000N/50mm, the breaking elongation (warp direction and weft direction) is less than or equal to 5.0%, and the combustion performance is flame-retardant grade B1.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. The technical solution of the present invention is not limited to the following specific embodiments, and includes any combination of the specific embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.

In the present invention, the specific techniques or conditions not specified in the examples are performed according to the techniques or conditions described in the literature in the art or according to the product specification. The instruments and the like are conventional products which are purchased by normal distributors and are not indicated by manufacturers. The raw materials used in the invention can be purchased conveniently in domestic market. In the following embodiment of the invention, the alkali-resistant flame-retardant waterproof breathable film adopts the following raw materialsThe single fiber diameter of the alkali-resistant glass fiber cloth is 3 mu m, ZrO₂15% by mass of TiO₂6 percent of mass content and 200g/m of mass of the glass fiber cloth per unit area²The thickness is 0.8mm, the width is 0.5m, the length is 15m, the alkali-resistant tensile breaking strength (warp direction and weft direction) is more than or equal to 1000N/50mm, and the breaking elongation (warp direction and weft direction) is less than or equal to 5.0 percent; the silane coupling agent is adopted to pretreat the surface of the alkali-resistant glass fiber cloth, the type of the silane coupling agent is KH550, the boiling point is 217 ℃, the refractive index ND25 is 1.4205, the flash point is 104 ℃, and the molecular weight is 221.4, so that the bonding strength between the alkali-resistant glass fiber cloth and the waterproof air-permeable agent is increased. In the embodiment of the invention, the used flame retardant is a novel environment-friendly flame retardant containing bromine, phosphorus and nitrogen, the model is M208NBP, and the pH value regulator is 2-amino-2-methyl-1-propanol; core-shell emulsions used in the examples: the glass transition temperature Tg of the styrene-acrylic core-shell composite particle polymer is 80 ℃, the minimum film-forming temperature MFT is 5 ℃, the particle size of the polystyrene core is 150nm, and the thickness of the polyacrylate-styrene shell is 45 nm.