Non-foaming hot-coating sealant for building and preparation method of non-foaming hot-coating sealant

Abstract

The invention relates to the technical field of sealants, and discloses a non-foaming hot-coating sealant for buildings and a preparation method of the non-foaming hot-coating sealant. The sealant comprises the following components: 20-25 parts of polyethylene cerate; 0 to 10 parts of polyisobutene; 0 to 20 parts of siloxane-terminated acrylic acid grafted modified polyether; 5 to 20 parts of an alpha-silane modified polymer; 1 to 3 parts of gamma-aminopropyl triethoxy silane; and 5-15 parts of titanium dioxide. Bonding base materials of the sealant are metal, plastic and the like, and the sealant is excellent in aging resistance, free of construction wiredrawing phenomenon, excellent in clean and stable sealing and waterproof functions, free of organic tin catalysis slight crosslinking performance, outstanding in waterproof performance, good in sealing performance and long in service life. Revolutionary changes can be brought to the field of building materials, the field of chemical engineering, the technical field of sealants and the like in the future, and wide market requirements and development prospects are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of sealants, and more specifically, to a non-foaming hot-coat sealant for construction and a preparation method thereof. Background Art

[0002] In the field of building materials, sealant is an important material, which is widely used in joints, cracks and other parts of buildings that need to be sealed to prevent water and gas leakage. In the field of chemical engineering, sealant technology is a key technology to study how to manufacture and apply these sealants. In the field of sealant technology, non-foaming hot-coated sealant is an important type, which has slight cross-linking without organic tin catalysis, higher strength and shape retention than general non-curing paste glue, and easier to clean and faster initial deformation resistance than curing sealant.

[0003] Existing non-foaming hot-coated sealants are mainly composed of polyolefins, siloxane-terminated acrylic grafted modified polyethers, α-silane modified polymers, titanium dioxide, etc. These materials form a micro-cross-linked network structure through chemical reactions, thereby improving the strength and shape retention of the sealant. At the same time, since no organic tin catalyst is used, this sealant will not produce harmful volatile organic compounds during use, which meets environmental protection requirements.

[0004] Although existing non-foaming hot-coat sealants have significant advantages in strength, shape retention and environmental friendliness, they still have some problems in practical applications. First, the bonding substrate range of existing non-foaming hot-coat sealants is still limited, and not all types of substrates can be firmly bonded to them. Secondly, although this sealant has outstanding waterproof performance, its aging resistance under certain harsh environmental conditions still needs to be improved. In addition, existing non-foaming hot-coat sealants sometimes draw wire during the construction process, which not only affects the construction efficiency, but may also lead to poor sealing effects. Finally, although the cleaning and stable sealing and waterproofing functions of existing non-foaming hot-coat sealants are relatively excellent, they still need further improvement to meet higher building sealing requirements. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present application discloses a non-foaming hot-coat sealant for construction and a preparation method thereof.

[0006] In order to achieve the above invention objectives, this application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a non-foaming hot-coated sealant for construction, which comprises the following components by weight:

[0008] 20-25 parts of polyethylene wax paste;

[0009] Polyisobutylene 0-10 parts;

[0010] 0-20 parts of siloxane-terminated acrylic acid graft-modified polyether;

[0011] 5-20 parts of α-silane modified polymer;

[0012] γ-aminopropyltriethoxysilane 1-3 parts;

[0013] 5-15 parts of titanium dioxide.

[0014] Furthermore, the molecular weight of the polyolefin is 5000-10000, the molecular weight of the siloxane-terminated acrylic acid graft-modified polyether is 2000-5000, the molecular weight of the α-silane modified polymer is 1000-3000, and the particle size of the titanium dioxide is 5-10 μm.

[0015] Furthermore, the non-foaming hot-coated sealant for construction also includes one or more of a light stabilizer, a UV absorber, an antioxidant and a filler.

[0016] Furthermore, calculated by weight, the non-foaming hot-coated sealant for construction also includes:

[0017] Light stabilizer 0.1-0.5 parts;

[0018] 0.1-0.5 parts of UV absorber;

[0019] Antioxidant 0.1-0.5 parts.

[0020] Furthermore, the light stabilizer is a hindered amine light stabilizer; the antioxidant is a hindered phenol antioxidant; and the ultraviolet absorber is a benzophenone ultraviolet absorber.

[0021] Furthermore, calculated by weight, the filler includes:

[0022] Nano-active calcium carbonate 0-30 parts;

[0023] Silica powder 0-30 parts;

[0024] 0-5 parts of fumed silica;

[0025] Mica powder 0-20 parts;

[0026] Kaolin 0-20 parts.

[0027] Preferably, the non-foaming hot-coated sealant for construction comprises the following components, calculated by weight:

[0028] 23 parts of polyethylene wax paste;

[0029] 15 parts of siloxane-terminated acrylic acid graft-modified polyether;

[0030] 5 parts of α-silane modified polymer;

[0031] γ-aminopropyltriethoxysilane 2 parts;

[0032] 0.5 parts of light stabilizer;

[0033] 0.5 parts of UV absorber;

[0034] 0.5 parts of antioxidant;

[0035] 25 parts of nano-activated calcium carbonate;

[0036] Titanium dioxide 10 parts;

[0037] 3.5 parts of fumed silica;

[0038] 15 parts of mica powder.

[0039] Preferably, the non-foaming hot-coated sealant for construction comprises the following components, calculated by weight:

[0040] 23 parts of polyethylene wax paste;

[0041] 5 parts of polyisobutylene;

[0042] 15 parts of α-silane modified polymer;

[0043] γ-aminopropyltriethoxysilane 2 parts;

[0044] 0.5 parts of light stabilizer;

[0045] 0.5 parts of UV absorber;

[0046] 0.5 parts of antioxidant;

[0047] 25 parts of silicon micropowder;

[0048] Titanium dioxide 10 parts;

[0049] 3.5 parts of fumed silica;

[0050] 15 parts of mica powder.

[0051] Preferably, the non-foaming hot-coated sealant for construction comprises the following components, calculated by weight:

[0052] 23 parts of polyethylene wax paste;

[0053] 5 parts of polyisobutylene;

[0054] 10 parts of siloxane-terminated acrylic acid graft-modified polyether;

[0055] 5 parts of α-silane modified polymer;

[0056] γ-aminopropyltriethoxysilane 2 parts;

[0057] 0.5 parts of light stabilizer;

[0058] 0.5 parts of UV absorber;

[0059] 0.5 parts of antioxidant;

[0060] 25 parts of nano-activated calcium carbonate;

[0061] Titanium dioxide 10 parts;

[0062] 3.5 parts of fumed silica;

[0063] 15 parts of kaolin.

[0064] In a second aspect, the present application provides a method for preparing the non-foaming hot-coated sealant for construction in the first aspect, comprising the following steps:

[0065] Step 1: Evenly mix polyethylene wax paste, polyisobutylene, siloxane-terminated acrylic acid graft-modified polyether, α-silane-modified polymer, γ-aminopropyltriethoxysilane and titanium dioxide according to weight ratio;

[0066] Step 2: Add antioxidants, UV absorbers, and other fillers to the evenly mixed materials and continue to mix evenly;

[0067] Step 3: Vacuum degas the evenly mixed materials to obtain the product.

[0068] Compared with the existing technology, the beneficial effects of this technical solution are as follows:

[0069] 1. Wider range of substrate bonding: The non-foaming hot-coat sealant of the present invention adopts a special formula, which enables it to be firmly bonded to more substrates, solving the problem of limited bonding range of substrates in the prior art. Whether it is concrete, masonry, metal, or glass, wood, etc., it can be firmly bonded with this sealant, which increases its application range in the construction field.

[0070] 2. Excellent anti-aging performance: The non-foaming hot-coat sealant of the present invention has a special anti-aging agent added to the formula, so that it can maintain good performance under harsh environmental conditions. Compared with the prior art, the sealant of the present invention can maintain its strength and shape for a longer time, reduce the sealing failure problem caused by aging, and increase the service life of the building.

[0071] 3. No wire drawing construction: The non-foaming hot-coated sealant of the present invention will not have wire drawing during the construction process, which not only improves the construction efficiency, but also ensures the uniformity and integrity of the sealing effect. Compared with the prior art, the sealant of the present invention is easier to control and operate during use, reducing the trouble and risk during the construction process.

[0072] 4. Excellent cleaning and stable sealing and waterproofing functions: The non-foaming hot-coated sealant of the present invention adopts special cleaning and stabilization technology, so that it can quickly form a dense waterproof film after construction, effectively preventing water and gas leakage. Compared with the prior art, the cleaning and stable sealing and waterproofing functions of the sealant of the present invention are more outstanding and can meet higher building sealing requirements.

[0073] 5. Environmental protection and no pollution: The non-foaming hot-coated sealant of the present invention does not use organic tin catalysts in the formula, avoiding the generation of harmful volatile organic compounds and meeting environmental protection requirements. Compared with the prior art, the sealant of the present invention is more environmentally friendly during use and will not pose a threat to the environment and human health.

[0074] In summary, the non-foaming hot-coat sealant of the present invention has significant advantages in terms of bonding substrate range, aging resistance, construction drawing, cleaning and stable sealing and waterproofing functions, and environmental protection, and is an ideal building sealing material.

[0075] Due to the advanced nature of the technical solution, it can be widely used in the fields of building materials, chemical engineering and sealant technology. First, in the field of building materials, the new non-foaming hot-coated sealant has a wide range of bonding substrates, outstanding aging resistance and waterproof performance, no drawing during construction, and has a clean and stable sealing and waterproofing function. This will greatly improve the sealing effect of joints, cracks and other parts of the building that need to be sealed, effectively prevent water and gas leakage, thereby improving the durability and safety of the building. At the same time, due to its environmental protection and slight cross-linking without organic tin catalysis, it also meets the requirements of modern buildings for environmental protection and health, so it has a broad market demand. Secondly, in the field of chemical engineering, the manufacturing process and technology of the new non-foaming hot-coated sealant will promote the further development of sealant technology. Through the precise proportioning and chemical reaction control of materials such as polyolefins, siloxane-terminated acrylic grafted modified polyethers, α-silane modified polymers, titanium dioxide, etc., sealants with better performance and wider application range can be produced, which will provide more technical support and product selection for the field of chemical engineering. Finally, in the field of sealant technology, the development and application of this new non-foaming hot-coated sealant will lead the development direction of sealant technology. Its unique formula and manufacturing process not only improve the performance of the sealant, but also solve some problems in the existing technology, such as the limited range of bonding substrates, the need to improve aging resistance, and sometimes wire drawing during construction. This will promote the development of sealant technology, meet higher building sealing requirements, and bring more business opportunities and market competitiveness to related companies.

[0076] In summary, the development and application of this new type of non-foaming hot-coated sealant will bring revolutionary changes in the fields of building materials, chemical engineering and sealant technology, and has broad market demand and development prospects. DETAILED DESCRIPTION

[0077] The technical scheme and effects of the present application are further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the invention, rather than to limit the invention.

[0078] Unless otherwise specified, the materials used in the following examples are commercially available.

[0079] Examples 1-3

[0080] The raw materials and proportions in each embodiment are shown in the following table, and are prepared by the following method:

[0081] Step 1: Evenly mix polyethylene wax paste, polyisobutylene, siloxane-terminated acrylic graft-modified polyether, α-silane-modified polymer, γ-aminopropyltriethoxysilane and titanium dioxide according to weight ratio.

[0082] Step 2: Add antioxidants, UV absorbers, and other fillers to the evenly mixed materials and continue mixing.

[0083] Step 3: Vacuum degas the evenly mixed materials and then put them into a large barrel.

[0084] Step 4: As needed, use large barrels to apply glue (factory) or repackage into sticks (on-site gluing), and carry out construction according to the construction process.

[0085] Step 5: After the construction is completed, the sealant is tested for performance. The test results are shown in the following table.

[0086]

[0087]

[0088] The above test results show that the sealant in the embodiment of the present application can be bonded to a range of substrates including metals, plastics, etc. It has excellent aging resistance, no wire drawing during construction, excellent clean and stable sealing and waterproofing functions, and slight cross-linking without organic tin catalysis, and outstanding waterproof performance.

[0089] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed. However, as long as it is within the scope of the claims of the present application, it shall be protected by the patent law.

Claims

1. A non-foaming hot-applied sealant for construction, It is characterized in that Calculated by weight, it includes the following components: 20-25 parts of polyethylene wax paste; Polyisobutylene 0-10 parts; 0-20 parts of siloxane-terminated acrylic acid graft-modified polyether; 5-20 parts of α-silane modified polymer; γ-aminopropyltriethoxysilane 1-3 parts; 5-15 parts of titanium dioxide.

2. The non-foaming hot-coat sealant for construction according to claim 1, It is characterized in that The molecular weight of the polyolefin is 5000-10000, the molecular weight of the siloxane-terminated acrylic acid grafted modified polyether is 2000-5000, the molecular weight of the α-silane modified polymer is 1000-3000, and the particle size of the titanium dioxide is 5-10 μm.

3. The non-foaming hot-coated sealant for construction according to claim 1, It is characterized in that The non-foaming hot-coated sealant for construction further comprises one or more of a light stabilizer, an ultraviolet absorber, an antioxidant and a filler.

4. The non-foaming hot-coated sealant for construction according to claim 3, It is characterized in that Calculated by weight, the non-foaming hot-coated sealant for construction also includes: Light stabilizer 0.1-0.5 parts; 0.1-0.5 parts of UV absorber; Antioxidant 0.1-0.5 parts.

5. The non-foaming hot-coat sealant for construction according to claim 4, It is characterized in that The light stabilizer is a hindered amine light stabilizer; the antioxidant is a hindered phenol antioxidant; and the ultraviolet absorber is a benzophenone ultraviolet absorber.

6. The non-foaming hot-coated sealant for construction according to claim 3, It is characterized in that Calculated by weight, the filler includes: Nano-active calcium carbonate 0-30 parts; Silica powder 0-30 parts; 0-5 parts of fumed silica; Mica powder 0-20 parts; Kaolin 0-20 parts.

7. The non-foaming hot-coated sealant for construction according to claim 3, It is characterized in that Calculated by weight, it includes the following components: 23 parts of polyethylene wax paste; 15 parts of siloxane-terminated acrylic acid graft-modified polyether; 5 parts of α-silane modified polymer; γ-aminopropyltriethoxysilane 2 parts; 0.5 parts of light stabilizer; 0.5 parts of UV absorber; 0.5 parts of antioxidant; 25 parts of nano-activated calcium carbonate; Titanium dioxide 10 parts; 3.5 parts of fumed silica; 15 parts of mica powder.

8. The non-foaming hot-coated sealant for construction according to claim 3, It is characterized in that Calculated by weight, it includes the following components: 23 parts of polyethylene wax paste; 5 parts of polyisobutylene; 15 parts of α-silane modified polymer; γ-aminopropyltriethoxysilane 2 parts; 0.5 parts of light stabilizer; 0.5 parts of UV absorber; 0.5 parts of antioxidant; 25 parts of silicon micropowder; Titanium dioxide 10 parts; 3.5 parts of fumed silica; 15 parts of mica powder.

9. The non-foaming hot-coated sealant for construction according to claim 3, It is characterized in that Calculated by weight, it includes the following components: 23 parts of polyethylene wax paste; 5 parts of polyisobutylene; 10 parts of siloxane-terminated acrylic acid graft-modified polyether; 5 parts of α-silane modified polymer; γ-aminopropyltriethoxysilane 2 parts; 0.5 parts of light stabilizer; 0.5 parts of UV absorber; 0.5 parts of antioxidant; 25 parts of nano-activated calcium carbonate; Titanium dioxide 10 parts; 3.5 parts of fumed silica; 15 parts of kaolin.

10. A method for preparing a non-foaming hot-coat sealant for construction, It is characterized in that The following steps are involved: Step 1: Evenly mix polyethylene wax paste, polyisobutylene, siloxane-terminated acrylic acid graft-modified polyether, α-silane-modified polymer, γ-aminopropyltriethoxysilane and titanium dioxide according to weight ratio; Step 2: Add antioxidants, UV absorbers, and other fillers to the evenly mixed materials and continue to mix evenly; Step 3: Vacuum degas the evenly mixed materials to obtain the product.

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