Preparation method and use method of high-plugging-property sheet type expansion glue

Abstract

The invention discloses a preparation method and a use method of high-plugging-property sheet type expansion glue. The sheet type expansion glue with high plugging property is prepared from the following raw materials in parts by weight: 40 to 50 parts of styrene-butadiene-styrene block copolymer, 20 to 30 parts of dioctyl phthalate, 10 to 15 parts of azodicarbonamide, 20 to 30 parts of calcium carbonate, 1 to 3 parts of dicumyl peroxide, 3 to 5 parts of zinc oxide and 1 to 2 parts of butylated hydroxytoluene. According to the preparation method and the use method of the high-plugging-property sheet-type expansion glue, the proportion of the styrene-butadiene-styrene block copolymer, azodicarbonamide and other raw materials is controlled, and the temperature, the stirring time, the reaction time and the like in the preparation process are controlled, so that the high-plugging-property sheet-type expansion glue is obtained; therefore, the prepared expansion glue has stable and appropriate expansion multiplying power, deformation of a sealing structure caused by excessive expansion due to too high temperature in a high-temperature environment is avoided, and a good plugging effect is always kept.

Description

Technical Field

[0001] The invention relates to the field of expansion adhesives, and in particular to a preparation method and a use method of a sheet-type expansion adhesive with high plugging properties. Background Art

[0002] In the construction manufacturing industry, the performance of sealing materials is crucial to ensuring product quality, extending service life and ensuring safety. High-sealing sheet expansion glue, as a key sealing material, plays an important role in sealing scenarios.

[0003] Existing high-sealing sheet-type expansion adhesives in the construction field will face various complex environmental conditions, such as temperature changes, humidity fluctuations, vibrations, and chemical erosion. Under the long-term effects of these environmental factors, problems such as unstable expansion ratio and decreased sealing performance are prone to occur. For example, in construction projects in some high-temperature areas, the existing expansion adhesives may over-expand due to high temperatures, causing deformation of the sealing structure and thus losing a good sealing effect; while in cold areas, the expansion speed of the expansion adhesive may be too slow to effectively fill the gaps in a timely manner, affecting the timeliness and integrity of the seal. In addition, the surface properties and chemical compositions of different building materials vary greatly. The existing expansion adhesives have poor compatibility with certain new building materials, making it difficult to form a strong bond, reducing the overall reliability of the sealing system. In order to solve the above problems, we propose a preparation method for a high-sealing sheet-type expansion adhesive. Summary of the invention

[0004] The main purpose of the present invention is to provide a preparation method and a use method of a sheet-type expansion adhesive with high blocking performance, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A high-blocking sheet-type expansion adhesive. The components and contents of the raw materials used for the high-blocking sheet-type expansion adhesive include: 40-50 parts of styrene-butadiene-styrene block copolymer, 20-30 parts of dioctyl phthalate, 10-15 parts of azodicarbonamide, 20-30 parts of calcium carbonate, 1-3 parts of diisopropylbenzene peroxide, 3-5 parts of zinc oxide, and 1-2 parts of di-tert-butyl-p-cresol.

[0007] Preferably, the components and contents of the raw material for high-blocking sheet-type expansion adhesive include: 40 parts of styrene-butadiene-styrene block copolymer, 20 parts of dioctyl phthalate, 10 parts of azodicarbonamide, 20 parts of calcium carbonate, 1 part of diisopropylbenzene peroxide, 3 parts of zinc oxide, and 1 part of di-tert-butyl-p-cresol.

[0008] Preferably, the components and contents of the raw material for the high-blocking sheet-type expansion adhesive include: 45 parts of styrene-butadiene-styrene block copolymer, 25 parts of dioctyl phthalate, 11 parts of azodicarbonamide, 22 parts of calcium carbonate, 2 parts of diisopropylbenzene peroxide, 3 parts of zinc oxide, and 2 parts of di-tert-butyl-p-cresol.

[0009] Preferably, the components and contents of the raw material for high-blocking sheet-type expansion adhesive include: 46 parts of styrene-butadiene-styrene block copolymer, 24 parts of dioctyl phthalate, 14 parts of azodicarbonamide, 23 parts of calcium carbonate, 1 part of diisopropylbenzene peroxide, 5 parts of zinc oxide, and 1 part of di-tert-butyl-p-cresol.

[0010] Preferably, the components and contents of the raw material for the high-blocking sheet-type expansion adhesive include: 43 parts of styrene-butadiene-styrene block copolymer, 28 parts of dioctyl phthalate, 11 parts of azodicarbonamide, 26 parts of calcium carbonate, 2 parts of diisopropylbenzene peroxide, 4 parts of zinc oxide, and 2 parts of di-tert-butyl-p-cresol.

[0011] The present invention also provides a method for preparing a high-blocking sheet-type expansion adhesive, which specifically comprises the following steps:

[0012] S1, adding the measured styrene-butadiene-styrene block copolymer into a high-speed mixer, stirring at a temperature of 50 to 60° C. for 10 to 15 minutes to initially soften it;

[0013] S2, then add dioctyl phthalate, azodicarbonamide, calcium carbonate, and di-tert-butyl-p-cresol in sequence, and continue stirring for 20 to 30 minutes to fully mix the components to obtain a premix;

[0014] S3, transferring the premix to a twin-screw extruder, adding dicumyl oxide and zinc oxide, and performing an extrusion reaction at a temperature below 120° C., controlling the screw speed at 150 to 200 revolutions per minute, and the reaction time is 10 to 15 minutes;

[0015] S4, after the material is extruded from the twin-screw extruder, it is pressed into a desired sheet shape through a mold;

[0016] S5, the mold temperature is controlled at 40-50°C, so that the sheet is quickly cooled and shaped to obtain a high-sealing sheet-type expansion adhesive product.

[0017] The present invention also provides a method for using the high-blocking sheet-type expansion adhesive, which specifically comprises the following steps:

[0018] The high-sealing sheet-type expansion rubber product is placed at the position where it is needed, and then baked at high temperature. The azodicarbonamide will decompose at high temperature to produce gas to expand and foam the rubber, thereby sealing the position that needs to be sealed.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By controlling the ratio of raw materials such as styrene-butadiene-styrene block copolymer and azodicarbonamide, as well as controlling the temperature, stirring time, reaction time, etc. during the preparation process, the prepared expansion glue has a stable and appropriate expansion ratio. In a high temperature environment, it will not cause deformation of the sealing structure due to excessive expansion due to excessive temperature, and always maintain a good sealing effect. In cold areas, it can also expand quickly and effectively, fill gaps in time, ensure the timeliness and integrity of the seal, and greatly improve the sealing performance in a complex temperature environment.

[0021] 2. By optimizing the formula, the prepared high-sealing sheet-type expansion adhesive has good compatibility with a variety of new building materials. The synergistic effect between styrene-butadiene-styrene block copolymer and plasticizer dioctyl phthalate improves the surface performance and adhesion of the expansion adhesive, enabling it to form a strong bond with various building materials, greatly improving the overall reliability of the sealing system and effectively avoiding the problem of sealing failure caused by poor compatibility. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] The elements and features described in one embodiment of the present invention may be combined with the elements and features shown in one or more other embodiments. It should be noted that for the purpose of clarity, the representation and description of components or processes that are not related to the present invention and are known to those of ordinary skill in the art are omitted in the description.

[0024] The components and contents of the raw material of the high-blocking sheet-type expansion adhesive include: 40-50 parts of styrene-butadiene-styrene block copolymer, 20-30 parts of dioctyl phthalate, 10-15 parts of azodicarbonamide, 20-30 parts of calcium carbonate, 1-3 parts of diisopropylbenzene peroxide, 3-5 parts of zinc oxide, and 1-2 parts of di-tert-butyl-p-cresol.

[0025] The specific steps of the production method are as follows:

[0026] S1, adding the measured styrene-butadiene-styrene block copolymer into a high-speed mixer, stirring at a temperature of 50 to 60° C. for 10 to 15 minutes to initially soften it;

[0027] S2, then add dioctyl phthalate, azodicarbonamide, calcium carbonate, and di-tert-butyl-p-cresol in sequence, and continue stirring for 20 to 30 minutes to fully mix the components to obtain a premix;

[0028] S3, transferring the premix to a twin-screw extruder, adding dicumyl oxide and zinc oxide, and performing an extrusion reaction at a temperature below 120° C., controlling the screw speed at 150 to 200 revolutions per minute, and the reaction time is 10 to 15 minutes;

[0029] S4, after the material is extruded from the twin-screw extruder, it is pressed into a desired sheet shape through a mold;

[0030] S5, the mold temperature is controlled at 40-50°C, so that the sheet is quickly cooled and shaped to obtain a high-sealing sheet-type expansion adhesive product.

[0031] The specific usage is as follows:

[0032] Place the high-sealing sheet-type expansion rubber product at the location where it is needed, and then bake it at a high temperature. The baking temperature is controlled between 160 and 200°C. At this time, azodicarbonamide will decompose at high temperature to produce gas to expand and foam the rubber, thereby sealing the location that needs to be sealed.

[0033] Embodiment 1

[0034] Prepare according to the composition and content of specific raw materials: 40 parts of styrene-butadiene-styrene block copolymer, 20 parts of dioctyl phthalate, 10 parts of azodicarbonamide, 20 parts of calcium carbonate, 1 part of diisopropylbenzene peroxide, 3 parts of zinc oxide, and 1 part of di-tert-butyl-p-cresol.

[0035] The specific steps of the production method are as follows:

[0036] S1, adding the measured styrene-butadiene-styrene block copolymer into a high-speed mixer, stirring at a temperature of 50° C. for 10 minutes to initially soften it;

[0037] S2, then add dioctyl phthalate, azodicarbonamide, calcium carbonate, and di-tert-butyl-p-cresol in sequence, and continue stirring for 20 minutes to fully mix the components to obtain a premix;

[0038] S3, transferring the premix to a twin-screw extruder, adding dicumyl oxide and zinc oxide, and performing extrusion reaction at a temperature of 111° C., controlling the screw speed at 150 revolutions per minute, and the reaction time is 10 minutes;

[0039] S4, after the material is extruded from the twin-screw extruder, it is pressed into a desired sheet shape through a mold;

[0040] S5, the mold temperature is controlled at 40°C, so that the sheet is quickly cooled and shaped to obtain a high-sealing sheet-type expansion adhesive product.

[0041] The specific usage is as follows:

[0042] Place this high-sealing sheet-type expansion rubber product at the location where it is needed, and then bake it at a high temperature. The baking temperature is controlled at 166°C. At this time, azodicarbonamide will decompose at a high temperature of 166°C to produce gas that causes the rubber to expand and foam, thereby sealing the location that needs to be sealed.

[0043] Embodiment 2

[0044] Prepare according to the composition and content of specific raw materials: 45 parts of styrene-butadiene-styrene block copolymer, 25 parts of dioctyl phthalate, 11 parts of azodicarbonamide, 22 parts of calcium carbonate, 2 parts of diisopropylbenzene peroxide, 3 parts of zinc oxide, and 2 parts of di-tert-butyl-p-cresol.

[0045] The specific steps of the production method are as follows:

[0046] S1, adding the measured styrene-butadiene-styrene block copolymer into a high-speed mixer, stirring at a temperature of 55° C. for 12 minutes to initially soften it;

[0047] S2, then add dioctyl phthalate, azodicarbonamide, calcium carbonate, and di-tert-butyl-p-cresol in sequence, and continue stirring for 23 minutes to fully mix the components to obtain a premix;

[0048] S3, transferring the premix to a twin-screw extruder, adding dicumyl oxide and zinc oxide, and performing extrusion reaction at a temperature of 100° C., controlling the screw speed at 180 revolutions per minute, and the reaction time is 15 minutes;

[0049] S4, after the material is extruded from the twin-screw extruder, it is pressed into a desired sheet shape through a mold;

[0050] S5, the mold temperature is controlled at 43°C, so that the sheet is quickly cooled and shaped to obtain a high-sealing sheet-type expansion adhesive product.

[0051] The specific usage is as follows:

[0052] Place this high-sealing sheet-type expansion rubber product at the location where it is needed, and then bake it at a high temperature. The baking temperature is controlled at 180°C. At this time, azodicarbonamide will decompose at a high temperature of 180°C to produce gas that causes the rubber to expand and foam, thereby sealing the location that needs to be sealed.

[0053] Embodiment 3

[0054] Prepare according to the composition and content of specific raw materials: 46 parts of styrene-butadiene-styrene block copolymer, 24 parts of dioctyl phthalate, 14 parts of azodicarbonamide, 23 parts of calcium carbonate, 1 part of diisopropylbenzene peroxide, 5 parts of zinc oxide, and 1 part of di-tert-butyl-p-cresol;

[0055] The specific steps of the production method are as follows:

[0056] S1, adding the measured styrene-butadiene-styrene block copolymer into a high-speed mixer, stirring at a temperature of 58° C. for 14 minutes to initially soften it;

[0057] S2, then add dioctyl phthalate, azodicarbonamide, calcium carbonate, and di-tert-butyl-p-cresol in sequence, and continue stirring for 26 minutes to fully mix the components to obtain a premix;

[0058] S3, transferring the premix to a twin-screw extruder, adding dicumyl oxide and zinc oxide, and performing extrusion reaction at a temperature of 90° C., controlling the screw speed at 176 revolutions per minute, and the reaction time is 13 minutes;

[0059] S4, after the material is extruded from the twin-screw extruder, it is pressed into a desired sheet shape through a mold;

[0060] S5, the mold temperature is controlled at 44°C, so that the sheet is quickly cooled and shaped to obtain a high-sealing sheet-type expansion adhesive product.

[0061] The specific usage is as follows:

[0062] Place this high-sealing sheet-type expansion rubber product at the location where it is needed, and then bake it at a high temperature. The baking temperature is controlled at 190°C. At this time, azodicarbonamide will decompose at a high temperature of 190°C to produce gas that causes the rubber to expand and foam, thereby sealing the location that needs to be sealed.

[0063] Embodiment 4

[0064] Prepare according to the composition and content of specific raw materials: 43 parts of styrene-butadiene-styrene block copolymer, 28 parts of dioctyl phthalate, 11 parts of azodicarbonamide, 26 parts of calcium carbonate, 2 parts of diisopropylbenzene peroxide, 4 parts of zinc oxide, and 2 parts of di-tert-butyl-p-cresol.

[0065] The specific steps of the production method are as follows:

[0066] S1, adding the measured styrene-butadiene-styrene block copolymer into a high-speed mixer, stirring at a temperature of 54° C. for 11 minutes to initially soften it;

[0067] S2, then add dioctyl phthalate, azodicarbonamide, calcium carbonate, and di-tert-butyl-p-cresol in sequence, and continue stirring for 26 minutes to fully mix the components to obtain a premix;

[0068] S3, transferring the premix to a twin-screw extruder, adding dicumyl oxide and zinc oxide, and performing extrusion reaction at a temperature of 80° C., with the screw speed controlled at 188 revolutions per minute, and the reaction time being 13 minutes;

[0069] S4, after the material is extruded from the twin-screw extruder, it is pressed into a desired sheet shape through a mold;

[0070] S5, the mold temperature is controlled at 43°C, so that the sheet is quickly cooled and shaped to obtain a high-sealing sheet-type expansion adhesive product.

[0071] The specific usage is as follows:

[0072] Place this high-blocking sheet expansion rubber product at the location where it is needed, and then bake it at high temperature. The baking temperature is controlled at 178°C. At this time, azodicarbonamide will decompose at a high temperature of 178°C to produce gas that causes the rubber to expand and foam, thereby sealing the location that needs to be blocked.

[0073] Embodiment 5

[0074] Prepare according to the composition and content of specific raw materials: 44 parts of styrene-butadiene-styrene block copolymer, 29 parts of dioctyl phthalate, 12 parts of azodicarbonamide, 27 parts of calcium carbonate, 1 part of diisopropylbenzene peroxide, 3 parts of zinc oxide, and 1 part of di-tert-butyl-p-cresol.

[0075] The specific steps of the production method are as follows:

[0076] S1, adding the measured styrene-butadiene-styrene block copolymer into a high-speed mixer, and stirring at a temperature of 51° C. for 11 minutes to initially soften it;

[0077] S2, then add dioctyl phthalate, azodicarbonamide, calcium carbonate, and di-tert-butyl-p-cresol in sequence, and continue stirring for 21 minutes to fully mix the components to obtain a premix;

[0078] S3, transferring the premix to a twin-screw extruder, adding dicumyl oxide and zinc oxide, and performing extrusion reaction at a temperature of 70° C., controlling the screw speed at 166 revolutions per minute, and the reaction time is 14 minutes;

[0079] S4, after the material is extruded from the twin-screw extruder, it is pressed into a desired sheet shape through a mold;

[0080] S5, the mold temperature is controlled at 41°C, so that the sheet is quickly cooled and shaped to obtain a high-sealing sheet-type expansion adhesive product.

[0081] The specific usage is as follows:

[0082] Place this high-sealing sheet-type expansion rubber product at the location where it is needed, and then bake it at a high temperature. The baking temperature is controlled at 187°C. At this time, azodicarbonamide will decompose at a high temperature of 187°C to produce gas that causes the rubber to expand and foam, thereby sealing the location that needs to be sealed.

[0083] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-blocking sheet-type expansion adhesive, characterized in that: The components and contents of the raw material of the high-blocking sheet-type expansion adhesive include: 40-50 parts of styrene-butadiene-styrene block copolymer, 20-30 parts of dioctyl phthalate, 10-15 parts of azodicarbonamide, 20-30 parts of calcium carbonate, 1-3 parts of diisopropylbenzene peroxide, 3-5 parts of zinc oxide, and 1-2 parts of di-tert-butyl-p-cresol.

2. A high-blocking sheet-type expansion adhesive according to claim 1, characterized in that: The components and contents of the raw material for high-blocking sheet-type expansion adhesive include: 40 parts of styrene-butadiene-styrene block copolymer, 20 parts of dioctyl phthalate, 10 parts of azodicarbonamide, 20 parts of calcium carbonate, 1 part of diisopropylbenzene peroxide, 3 parts of zinc oxide, and 1 part of di-tert-butyl-p-cresol.

3. The high-blocking sheet-type expansion adhesive according to claim 1, characterized in that: The components and contents of the raw material for high-blocking sheet-type expansion adhesive include: 45 parts of styrene-butadiene-styrene block copolymer, 25 parts of dioctyl phthalate, 11 parts of azodicarbonamide, 22 parts of calcium carbonate, 2 parts of diisopropylbenzene peroxide, 3 parts of zinc oxide, and 2 parts of di-tert-butyl-p-cresol.

4. The high-blocking sheet-type expansion adhesive according to claim 1, characterized in that: The components and contents of the raw material for high-blocking sheet-type expansion adhesive include: 46 parts of styrene-butadiene-styrene block copolymer, 24 parts of dioctyl phthalate, 14 parts of azodicarbonamide, 23 parts of calcium carbonate, 1 part of diisopropylbenzene peroxide, 5 parts of zinc oxide, and 1 part of di-tert-butyl-p-cresol.

5. The high-blocking sheet-type expansion adhesive according to claim 1, characterized in that: The components and contents of the raw material for high-blocking sheet-type expansion adhesive include: 43 parts of styrene-butadiene-styrene block copolymer, 28 parts of dioctyl phthalate, 11 parts of azodicarbonamide, 26 parts of calcium carbonate, 2 parts of diisopropylbenzene peroxide, 4 parts of zinc oxide, and 2 parts of di-tert-butyl-p-cresol.

6. The high-blocking sheet-type expansion adhesive according to claim 1, characterized in that: The components and contents of the raw material for high-blocking sheet-type expansion adhesive include: 44 parts of styrene-butadiene-styrene block copolymer, 29 parts of dioctyl phthalate, 12 parts of azodicarbonamide, 27 parts of calcium carbonate, 1 part of diisopropylbenzene peroxide, 3 parts of zinc oxide, and 1 part of di-tert-butyl-p-cresol.

7. A method for preparing a high-blocking sheet-type expansion adhesive, according to any one of claims 1 to 6, characterized in that: The specific steps include: S1, adding the measured styrene-butadiene-styrene block copolymer into a high-speed mixer, stirring at a temperature of 50 to 60° C. for 10 to 15 minutes to initially soften it; S2, then add dioctyl phthalate, azodicarbonamide, calcium carbonate, and di-tert-butyl-p-cresol in sequence, and continue stirring for 20 to 30 minutes to fully mix the components to obtain a premix; S3, transferring the premix to a twin-screw extruder, adding dicumyl oxide and zinc oxide, and performing an extrusion reaction at a temperature below 120° C., controlling the screw speed at 150 to 200 revolutions per minute, and the reaction time is 10 to 15 minutes; S4, after the material is extruded from the twin-screw extruder, it is pressed into a desired sheet shape through a mold; S5, the mold temperature is controlled at 40-50°C, so that the sheet is quickly cooled and shaped to obtain a high-sealing sheet-type expansion adhesive product.

8. A method for using a high-blocking sheet-type expansion adhesive, the expansion adhesive prepared by the method for preparing a high-blocking sheet-type expansion adhesive according to claim 7, characterized in that: The high-sealing sheet-type expansion rubber product is placed at the position where it is needed, and then baked at high temperature. The azodicarbonamide will decompose at high temperature to produce gas to expand and foam the rubber, thereby sealing the position that needs to be sealed.