Special interface agent for plastering gypsum as well as preparation method and application thereof

Abstract

The invention belongs to the technical field of wall plastering systems, and particularly relates to a special interface agent for plastering gypsum as well as a preparation method and application thereof. The interface agent special for the plastering gypsum is prepared from PDF, acrylic resin, oxidation toner, terpene resin, disproportionated rosin, liquid caustic soda, a preservative and water. The interface agent special for the plastering gypsum has excellent air permeability, permeability, bidirectional adhesion and waxy soft viscidity, can adapt to tiny deformation caused by thermal expansion and cold contraction reaction changes among the plastering gypsum, a shear wall, an aerated block wall and the like, and can avoid bubbles and enhance the adhesion force of a base surface. The preparation method of the interface agent special for the plastering gypsum is simple, and the interface agent has a good application prospect in the field of the plastering gypsum.

Description

Technical Field

[0001] The invention belongs to the technical field of wall plastering systems, and in particular relates to a special interface agent for plastering gypsum and a preparation method and application thereof. Background Art

[0002] In order to promote green and energy-saving new buildings, many residential and office buildings now use frame structures, secondary filling of aerated blocks, hollow bricks, etc., and plaster gypsum is often used as a new product to replace cement mortar plastering for leveling and painting of the inner walls.

[0003] In view of the different conditions that may occur when this new product works together with walls of different properties such as shear walls, such as cracking, hollowing, bubbles, and powdering, it is necessary to develop a product that can solve the above problems when plaster is used on different interfaces.

[0004] The patent application with application number: 202010039792.9 discloses a plaster gypsum antifoaming interface agent, the mass percentage of each component of which is: water 35-50%, preservative 0.1-0.3%, dispersant 0.1-0.3%, defoamer 0.05-0.3%, filler 25-35%, emulsion 25-30%, cellulose 0.3-0.5%, bentonite 0.5-1.0%, film-forming aid 0.75-1.2%, propylene glycol 0.3%-0.5%, pH adjuster 0.05-0.3%. Advantages of the invention: Compared with the prior art, the present invention has good adhesion and does not affect the normal construction and engineering quality of plaster gypsum.

[0005] The patent application with application number: 202111562420.5 discloses a concrete base interface agent for preventing bubbling of plaster gypsum mortar layer, including the following raw materials in parts by weight: 5-60 parts of polymer emulsion; 1-15 parts of nano anti-alkali bottoming emulsion; 0.5-10 parts of protective colloid; 0.01-1 parts of antiseptic and fungicide; 0.1-5 parts of film-forming aid; 0.1-5 parts of thickener; 0.1-2 parts of pH adjuster; 0.1-1 parts of dispersant; 0.1-3 parts of freeze-thaw stabilizer; 0.1-3 parts of wetting agent; 0.1-1 parts of defoamer; 0.1-1 parts of colorant; 40-85 parts of deionized water. The present invention adopts a thickener for improving medium / low shear viscosity and a thickener for improving high shear viscosity, so that the base interface agent coating has excellent anti-sagging and anti-splashing properties, and still has good construction performance after dilution with water.

[0006] The patent application with application number: 202210270758.1 discloses a concrete interface agent for plastering gypsum, which relates to the field of coating technology. It includes 20% to 60% of alkali-resistant and highly permeable polymer emulsion, 0.1% to 0.5% of thickener, 0.1% to 0.3% of wetting agent, 0% to 0.8% of dispersant, 0.1% to 0.6% of defoamer, 0% to 10% of heavy calcium, 0% to 25% of quartz sand, and 30% to 60% of water by weight percentage. The interface agent of the present invention effectively solves the problem of bubbles generated during the construction of plastering gypsum and improves the tensile bonding performance.

[0007] The interface agent disclosed in the prior art has poor air permeability and penetration, poor performance in preventing bubbling during or after gypsum construction, and poor adhesion. Summary of the invention

[0008] Based on the above technical background, the main purpose of the present invention is to provide a special interface agent for plastering gypsum and its preparation method and application, so as to overcome the shortcomings of the prior art.

[0009] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention includes:

[0010] The first aspect of the present invention is to provide a special interface agent for plastering gypsum, wherein the special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

[0011]

[0012]

[0013] Preferably, the special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

[0014]

[0015] More preferably, the special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

[0016]

[0017] Preferably, the preservative is isothiazolinone.

[0018] The second aspect of the present invention is to provide a method for preparing the special interface agent for plastering gypsum according to the first aspect of the present invention, and the preparation method comprises the following steps:

[0019] Step 1, mixing water and PDF, heating and stirring evenly to obtain PDF hydrate;

[0020] Step 2, adding acrylic resin, oxidized toner, and terpene resin to the PDF hydrate in sequence, stirring continuously during the addition process, to obtain a resin mixture;

[0021] Step 3: Heat the disproportionated rosin, then add liquid alkali to obtain liquid disproportionated rosin, add the liquid disproportionated rosin to the resin mixture, cool it down, add a preservative, mix well, and obtain a special interface agent for plastering gypsum.

[0022] In step 1,

[0023] Preferably, water and PDF are mixed and stirred at 0-4° C. for 3-7 min.

[0024] In step 2,

[0025] Preferably, acrylic resin, oxidized color powder and terpene resin are added to PDF hydrate in sequence, and stirring is continued during the addition process. The stirring temperature is 0 to 4° C. and the stirring time is 20 to 45 min.

[0026] In step 3,

[0027] Preferably, the temperature of the disproportionated rosin is raised to 90-100° C., and liquid alkali is gradually added dropwise to obtain liquid disproportionated rosin;

[0028] Liquid disproportionated rosin is added to the resin mixture, the mixture is cooled to 45-55° C., a preservative is added, and the mixture is evenly mixed until the mixture is completely integrated into the above materials to obtain a special interface agent for plastering gypsum.

[0029] The third aspect of the present invention is to provide an application of the special interface agent for plastering gypsum described in the first aspect of the present invention in the field of plastering gypsum.

[0030] The beneficial effects of the present invention are:

[0031] (1) The special interface agent for plastering gypsum of the present invention has excellent air permeability and permeability. The interface agent for plastering gypsum should have certain air permeability and permeability so that the gypsum can form an effective physical bond with the concrete base during the hydration and crystallization process to avoid hollowing.

[0032] The special interface agent for plastering gypsum has bidirectional adhesion. After being cured, the interface agent can form a chain anchoring effect downward and form chain-like crystallization toward the surface layer, thereby enhancing the adhesion.

[0033] The special interface agent for plastering gypsum has a glutinous and soft viscosity, can adapt to the slight deformation caused by the thermal expansion and contraction reaction between the plastering gypsum and the shear wall, aerated block wall, etc., and can more effectively solve the large number of bubbles caused by the thick plastering gypsum due to the small holes on the shear wall. The interface agent can avoid bubbles and enhance the adhesion of the base surface.

[0034] (2) The preparation method of the special interface agent for plastering gypsum of the present invention is simple and can realize industrial scale-up production. The special interface agent for plastering gypsum has good application prospects in the field of plastering gypsum. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below, and the characteristics and advantages of the present invention will become clearer and more distinct with the description.

[0036] The first aspect of the present invention is to provide a special interface agent for plastering gypsum, wherein the special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

[0037]

[0038] Preferably, the special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

[0039]

[0040]

[0041] More preferably, the special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

[0042]

[0043] The PDF is a mixture of acrylate and methacrylate, wherein the mass ratio of acrylate to methacrylate is 1:(1-3), and preferably, the mass ratio of acrylate to methacrylate is 1:2.

[0044] The preservative is isothiazolinone.

[0045] The second aspect of the present invention is to provide a method for preparing the special interface agent for plastering gypsum according to the first aspect of the present invention, and the preparation method comprises the following steps:

[0046] Step 1, mixing water and PDF, heating and stirring evenly to obtain PDF hydrate;

[0047] Step 2, adding acrylic resin, oxidized toner, and terpene resin to the PDF hydrate in sequence, stirring continuously during the addition process, to obtain a resin mixture;

[0048] Step 3: Heat the disproportionated rosin, then add liquid alkali to obtain liquid disproportionated rosin, add the liquid disproportionated rosin to the resin mixture, cool it down, add a preservative, mix well, and obtain a special interface agent for plastering gypsum.

[0049] The above steps are described in detail below.

[0050] In step 1, water and PDF are mixed and stirred at 0-4° C. for 3-7 minutes to fully mix them. During the mixing process, PDF is fully saturated with water.

[0051] Preferably, stirring is carried out at 0°C for 5 min.

[0052] In step 2, acrylic resin, oxidized color powder and terpene resin are added to PDF hydrate in sequence, and stirring is continued during the addition process. The stirring temperature is 0 to 4° C. and the stirring time is 20 to 45 min.

[0053] Preferably, the stirring temperature is 0°C and the stirring time is 30 min.

[0054] Make the oxidized color powder disperse evenly without agglomeration, gradually increase the conversion, and fully mix the resin.

[0055] In step 3, the temperature of the disproportionated rosin is raised to 90-100°C, and liquid alkali is gradually added dropwise to make the disproportionated rosin alkalized and thickened at high temperature and keep it in a liquid state to obtain liquid disproportionated rosin. Liquid disproportionated rosin is added to the resin mixture, the temperature is lowered to 45-55°C, a preservative is added, and the mixture is mixed evenly until it is completely integrated into the above materials to obtain a special interface agent for plastering gypsum.

[0056] Preferably, the disproportionate rosin is heated to 95°C, and liquid alkali is gradually added dropwise to obtain liquid disproportionate rosin. Liquid disproportionate rosin is added to the resin mixture, the temperature is lowered to 50°C, a preservative is added, and the mixture is mixed evenly until it is completely integrated into the above materials to obtain a special interface agent for plastering gypsum.

[0057] The third aspect of the present invention is to provide an application of the special interface agent for plastering gypsum described in the first aspect of the present invention in the field of plastering gypsum.

[0058] Specifically, the special interface agent for plastering gypsum is suitable for pretreatment of base interfaces of concrete shear walls, aerated concrete blocks, light-inclined brick-mixed wall surfaces, various putty scraping, tile bonding, back coating, and thermal insulation boards.

[0059] Example

[0060] The present invention is further described below by specific examples, which are limited to illustrating the present invention but not to limiting the scope of the present invention. The raw materials used in the examples of the present invention were all purchased.

[0061] Example 1

[0062] Weigh 0.5 parts by weight of PDF (industrial epoxy), 10 parts by weight of acrylic resin, 1 part by weight of oxidized toner, 30 parts by weight of terpene resin, 17 parts by weight of disproportionated rosin, 1 part by weight of liquid alkali (NaOH), 0.5 parts by weight of preservative isothiazolinone, and 40 parts by weight of water. The PDF is a mixture of acrylate and methacrylate, wherein the mass ratio of acrylate to methacrylate is 1:2.

[0063] Water and PDF were mixed and stirred at 0°C for 5 minutes to fully mix them. During the mixing process, PDF was fully saturated with water to obtain PDF hydrate.

[0064] Acrylic resin, oxidized toner and terpene resin were added to the PDF hydrate in sequence, with continuous stirring during the addition process. The stirring temperature was 0° C. and the stirring time was 30 min to obtain a resin mixture.

[0065] The disproportionate rosin is heated to 95°C, and liquid alkali is gradually added dropwise to obtain liquid disproportionate rosin. The liquid disproportionate rosin is added to the resin mixture, and the temperature is lowered to 50°C. A preservative is added and mixed evenly until it is completely integrated into the above materials to obtain a special interface agent for plastering gypsum.

[0066] Example 2

[0067] Weigh 0.3 parts by weight of PDF (industrial epoxy), 7 parts by weight of acrylic resin, 0.8 parts by weight of oxidized toner, 25 parts by weight of terpene resin, 13 parts by weight of disproportionated rosin, 0.7 parts by weight of liquid caustic soda (NaOH), 0.3 parts by weight of preservative isothiazolinone, and 35 parts by weight of water. The PDF is a mixture of acrylate and methacrylate, wherein the mass ratio of acrylate to methacrylate is 1:1.

[0068] Water and PDF were mixed and stirred at 0°C for 5 minutes to fully mix them. During the mixing process, PDF was fully saturated with water to obtain PDF hydrate.

[0069] Acrylic resin, oxidized toner and terpene resin were added to the PDF hydrate in sequence, with continuous stirring during the addition process. The stirring temperature was 0° C. and the stirring time was 30 min to obtain a resin mixture.

[0070] The disproportionate rosin is heated to 90°C, and liquid alkali is gradually added dropwise to obtain liquid disproportionate rosin. The liquid disproportionate rosin is added to the resin mixture, and the temperature is lowered to 45°C. A preservative is added and mixed evenly until it is completely integrated into the above materials to obtain a special interface agent for plastering gypsum.

[0071] Example 3

[0072] Weigh 0.8 parts by weight of PDF (industrial epoxy), 12 parts by weight of acrylic resin, 2 parts by weight of oxidized toner, 35 parts by weight of terpene resin, 20 parts by weight of disproportionated rosin, 1.5 parts by weight of liquid caustic soda (NaOH), 0.7 parts by weight of preservative isothiazolinone, and 45 parts by weight of water. The PDF is a mixture of acrylate and methacrylate, wherein the mass ratio of acrylate to methacrylate is 1:3.

[0073] Water and PDF were mixed and stirred at 0°C for 5 minutes to fully mix them. During the mixing process, PDF was fully saturated with water to obtain PDF hydrate.

[0074] Acrylic resin, oxidized toner and terpene resin were added to the PDF hydrate in sequence, with continuous stirring during the addition process. The stirring temperature was 0° C. and the stirring time was 30 min to obtain a resin mixture.

[0075] The disproportionate rosin is heated to 100°C, and liquid alkali is gradually added dropwise to obtain liquid disproportionate rosin. The liquid disproportionate rosin is added to the resin mixture, and the temperature is lowered to 55°C. A preservative is added and mixed evenly until it is completely integrated into the above materials to obtain a special interface agent for plastering gypsum.

[0076] The present invention has been described in detail above in conjunction with specific implementations and exemplary examples, but these descriptions cannot be understood as limiting the present invention. Those skilled in the art understand that, without departing from the spirit and scope of the present invention, a variety of equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its implementation methods, all of which fall within the scope of the present invention. The scope of protection of the present invention shall be subject to the attached claims.

Claims

1. A special interface agent for plastering gypsum, characterized in that: The special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

2. The special interface agent for plastering gypsum according to claim 1, characterized in that: The special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

3. The special interface agent for plastering gypsum according to claim 2, characterized in that: The special interface agent for plastering gypsum is prepared from the following raw materials in parts by weight:

4. The special interface agent for plastering gypsum according to claim 1, characterized in that: The preservative is isothiazolinone.

5. A method for preparing a special interface agent for plastering gypsum according to any one of claims 1 to 4, characterized in that: The preparation method comprises the following steps: Step 1, mixing water and PDF, heating and stirring evenly to obtain PDF hydrate; Step 2, adding acrylic resin, oxidized toner, and terpene resin to the PDF hydrate in sequence, stirring continuously during the addition process, to obtain a resin mixture; Step 3: Heat the disproportionated rosin, then add liquid alkali to obtain liquid disproportionated rosin, add the liquid disproportionated rosin to the resin mixture, cool it down, add a preservative, mix well, and obtain a special interface agent for plastering gypsum.

6. The preparation method according to claim 1, characterized in that: In step 1, Mix water and PDF and stir at 0-4°C for 3-7 min.

7. The preparation method according to claim 1, characterized in that: In step 2, Acrylic resin, oxidized color powder and terpene resin are added to PDF hydrate in sequence, and stirring is continued during the addition process. The stirring temperature is 0 to 4° C. and the stirring time is 20 to 45 min.

8. The preparation method according to claim 1, characterized in that: In step 3, The disproportionated rosin is heated to 90-100°C and liquid alkali is gradually added dropwise to obtain liquid disproportionated rosin; Liquid disproportionated rosin is added to the resin mixture, the mixture is cooled to 45-55° C., a preservative is added, and the mixture is evenly mixed until the mixture is completely integrated into the above materials to obtain a special interface agent for plastering gypsum.

9. Use of the special interface agent for plastering gypsum according to any one of claims 1 to 4 in the field of plastering gypsum.

Images