CN114716969A - High-displacement modified silicone adhesive - Google Patents
High-displacement modified silicone adhesive Download PDFInfo
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- CN114716969A CN114716969A CN202210451535.5A CN202210451535A CN114716969A CN 114716969 A CN114716969 A CN 114716969A CN 202210451535 A CN202210451535 A CN 202210451535A CN 114716969 A CN114716969 A CN 114716969A
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- rubber
- silicone adhesive
- raw material
- modified silicone
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a high-displacement modified silicone adhesive, and relates to the technical field of silicone adhesives. Comprises the following production steps: the method comprises the following steps: cleaning and drying a rubber raw material, cutting and crushing the rubber raw material into granular substances, sieving the granular substances, and selecting rubber granules with proper grain sizes according to the requirements of subsequent processes, wherein the rubber raw material comprises one or a mixture of ethylene propylene rubber, styrene butadiene rubber, isoprene rubber, nitrile rubber or raw rubber, vulcanized rubber and waste tires of other rubbers. The rubber particles of the silicone adhesive modified by the coupling agent have good compatibility with a silicone adhesive molecular chain, and when the silicone adhesive is stressed, the rubber particles deform, dissipate external force and provide larger deformation size, so that a silicone adhesive system has higher deformability and tear resistance, and the silicone adhesive is suitable for high displacement requirements of building sealing.
Description
Technical Field
The invention relates to the technical field of silicone adhesive, in particular to a silicone adhesive sealing technology in the building industry, and specifically relates to a high-displacement modified silicone adhesive.
Background
The silicone adhesive is a widely used sealing elastic material and has important application in the fields of buildings, bridges, roads, mechanical equipment and the like. The action mechanism of the silicone adhesive is that the prepolymer and water in the air (single component) or the prepolymer and a chain extender (double component) are subjected to chemical reaction to generate an elastomer with a cross-linked network structure, and the elastomer is attached to various seams to play a role in sealing and insulating or bonding. Because the crosslinking reaction occurs in the construction process, the silicone adhesive has high density of a crosslinking network and short molecular chain length between crosslinking points, and the silicone adhesive solidification body has low flexibility (small deformation capacity). In practical applications, the silicone adhesive has a low resistance to displacement at the joint, i.e., the silicone adhesive bond breaks or falls off from the substrate to cause failure of the seal when the glued joint undergoes large displacement deformation. The literature reports that the displacement resistance of the silicone adhesive is improved by improving the chain length of the chain extender, but in practical application, the chain extender or the prepolymer has an overlong molecular chain to cause insufficient crosslinking reaction, the crosslinking degree of a site construction system is low, and the strength of a cured body of the silicone adhesive cannot reach an expected target.
In order to improve the deformation and tear resistance of the silicone adhesive when the joint displaces, the invention provides a technical route for modifying the silicone adhesive by using rubber particles.
Disclosure of Invention
The present invention is directed to a high displacement modified silicone adhesive to solve the above problems of the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the high-displacement modified silicone adhesive comprises the following production steps:
the method comprises the following steps: cleaning and drying a rubber raw material, cutting and crushing the rubber raw material into granular substances, sieving the granular substances, and selecting rubber granules with proper grain sizes according to the requirements of subsequent processes;
step two: stirring and soaking the rubber particles in the treatment solution, filtering and drying to obtain modified rubber particles;
step three: adding auxiliary materials and the modified rubber particles into a homogenizer in batches under the assistance of a small amount of solvent, mixing, and uniformly stirring to form silicone collagen liquid;
step four: heating and stirring the silicone collagen liquid under vacuum condition, presetting a viscosity value, and when the viscosity of the mixed liquid reaches a preset viscosity, discharging, filling and packaging.
Further, the rubber raw material in the first step comprises one or more of ethylene propylene rubber, styrene butadiene rubber, isoprene rubber, nitrile rubber or raw rubber of rubber, vulcanized rubber and waste tires.
Still further, the treating fluid in step two comprises one or more mixtures of titanate, silane and coupling agent in alcohol/water solution.
Furthermore, the auxiliary materials in the third step comprise a methoxy group, an ethoxy group or other end-capped organic siloxane combination system, a flame retardant, a plasticizer, a rheological agent, a catalyst, an anti-aging agent and an inorganic filler.
Further, the heating temperature of the heating and stirring in the fifth step is controlled to be 25-90 ℃.
Compared with the prior art, the invention has the beneficial effects that:
according to the high-displacement modified silicone adhesive, the rubber particles are modified by the coupling agent and have good compatibility with a silicone adhesive molecular chain, when the high-displacement modified silicone adhesive is stressed, the rubber particles deform, external force is dissipated, a larger deformation size is provided, a silicone adhesive system has higher deformation capacity and tear resistance, and the high-displacement modified silicone adhesive is suitable for high displacement requirements of building sealing.
Meanwhile, the rubber particles are added in the production process of the silicone adhesive, the original production process and conditions of the silicone adhesive are basically not changed, the operability is high, and the production cost is hardly increased.
Drawings
FIG. 1 is a schematic view of a conventional silicone cure;
FIG. 2 is a schematic representation of the curing of the silicone adhesive after filling with rubber particles according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
It should be noted that in the description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, and do not indicate or imply that the referred device or element must have a specific orientation, be configured in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Further, it will be appreciated that the dimensions of the various elements shown in the figures are not drawn to scale, for ease of description, and that the thickness or width of some layers may be exaggerated relative to other layers, for example.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined or illustrated in one figure, it will not need to be further discussed or illustrated in detail in the description of the following figure.
Examples
The raw rubber, vulcanized rubber or waste tire reclaimed materials are crushed and sieved, then soaked by a coupling agent, and the treated rubber particles are added in the preparation process of the silicone adhesive to form a good compatible system with the silicone adhesive matrix, so that the high-displacement modified silicone adhesive is obtained. The rubber particles added into the system can obviously improve the elasticity and the tear resistance of a silicone adhesive solidification body, the anti-displacement capability of the silicone adhesive is improved, the rubber particles are modified by a coupling agent and have good compatibility with a silicone adhesive molecular chain, and when the rubber particles are stressed, the rubber particles deform, dissipate external force and provide larger deformation size, so that the silicone adhesive system has higher deformation capability and tear resistance, and the rubber particles are suitable for the high displacement requirement of building sealing.
Meanwhile, the rubber particles are added in the production process of the silicone adhesive, the original production process and conditions of the silicone adhesive are basically not changed, the operability is strong, and the production cost is hardly increased.
As shown in fig. 1 and 2, the present invention is compared with the prior art: the high-displacement modified silicone adhesive produced by the invention comprises the following production steps:
the method comprises the following steps: cleaning and drying a rubber raw material, cutting and crushing the rubber raw material into granular substances, sieving the granular substances, and selecting rubber granules with proper particle size according to the requirements of subsequent processes, wherein the rubber raw material comprises one or more of raw rubber, vulcanized rubber and waste tires of ethylene propylene rubber, styrene butadiene rubber, isoprene rubber, nitrile butadiene rubber or other rubbers;
step two: stirring and soaking rubber particles in a treatment solution, filtering and drying to obtain modified rubber particles, wherein the treatment solution comprises one or more of titanate, silane and alcohol/water solution of a coupling agent;
step three: adding auxiliary materials and the modified rubber particles into a homogenizer in batches under the assistance of a small amount of solvents (generally organic solvents such as toluene or ethyl acetate) and uniformly stirring to form silicone collagen liquid, wherein the auxiliary materials comprise methoxy, ethoxy or other end-capped organic siloxane combined systems, a flame retardant, a plasticizer, a rheological agent, a catalyst, an anti-aging agent and inorganic filler;
step four: heating and stirring the silicone collagen liquid under vacuum condition, presetting a viscosity value, unloading, filling and packaging when the viscosity of the mixed liquid reaches a preset viscosity, and controlling the heating temperature of heating and stirring to be 25-90 ℃.
In the specific implementation method, the content and the type of the rubber particles and the combination proportion of the organic siloxane are adjusted according to the application occasions of the silicone adhesive (doors and windows, concrete prefabricated blocks, external wall insulation bricks or pipeline gaps).
Compared with the traditional manufacturing mode, the silicone adhesive produced by the invention has the following advantages:
1. the method has simple technical process, improves the deformation capability of the silicone adhesive by adding the rubber particles, avoids adopting complex chemical reaction or selecting high-cost special organic silicon raw materials, and is suitable for the high-displacement sealing requirement of building gaps.
2. The rubber particles have wide variety and source, can adopt the reclaimed materials of waste tires, and have low cost.
3. The high-displacement silicone adhesive manufactured by the method has adjustable performance, different silicone adhesive formulas and plastic particle filling contents can be selected according to the possible displacement size, and the requirements of various application scenes are met.
The rubber raw materials used in the invention can be selected according to the actual conditions in the production process, the properties of the particles of the rubber raw materials after being crushed and cut are not greatly different, the rubber raw materials are usually selected according to the cost of the raw materials, the waste tires generally occupy the main body of production, and the cost and the source are low and wide.
The flame retardant used in the above step is added to the polymer to make the polymer flame retardant, and the additive flame retardant mainly comprises organic flame retardant and inorganic flame retardant, halogen flame retardant (organic chloride and organic bromide) and non-halogen. Organic flame retardants represented by bromine, phosphorus-nitrogen, red phosphorus, and compounds, and inorganic flame retardants mainly comprising antimony trioxide, magnesium hydroxide, aluminum hydroxide, silicon, and the like, and selected according to the purpose of use; the plasticizer is used, so that the performance of the high polymer material can be improved, the production cost is reduced, and the production benefit is improved; adjusting the flow characteristics of the material by adding a rheological agent; and adding a catalyst to accelerate the modification and reduce the heat required for the modification; in order to prolong the service life of the product, anti-aging agents are added, and most of the anti-aging agents can inhibit the oxidation effect, and some of the anti-aging agents can inhibit the heat or light effect, so that the service life of the product is prolonged. Generally divided into natural antioxidants, physical antioxidants and chemical antioxidants; the inorganic filler is inorganic powder filler such as metal salt.
It should be noted that the material usage amount in each step of the above production process needs to be determined according to the use requirement and the requirements of the next process, the particle sizes corresponding to different target products, the material usage and the processing time bucket are slightly different, but the main body of the production process is modified silicone adhesive added with rubber particles, the obtained effects are that the deformability and the tear resistance are improved on the basic silicone adhesive, and the deformability and the tear resistance which can be achieved can be flexibly controlled through the process.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The high-displacement modified silicone adhesive is characterized in that: the production steps are as follows:
the method comprises the following steps: cleaning and drying a rubber raw material, cutting and crushing the rubber raw material into granular substances, sieving the granular substances, and selecting rubber granules with proper grain sizes according to the requirements of subsequent processes;
step two: stirring and soaking the rubber particles in the treatment solution, filtering and drying to obtain modified rubber particles;
step three: adding auxiliary materials and the modified rubber particles into a homogenizer in batches under the assistance of a small amount of solvent, mixing, and uniformly stirring to form silicone collagen liquid;
step four: heating and stirring the silicone collagen liquid under vacuum condition, presetting a viscosity value, and when the viscosity of the mixed liquid reaches a preset viscosity, discharging, filling and packaging.
2. The high displacement modified silicone adhesive according to claim 1, wherein: the rubber raw material in the step one comprises one or more of ethylene propylene rubber, styrene butadiene rubber, isoprene rubber, nitrile rubber or crude rubber, vulcanized rubber and waste tires.
3. The high displacement modified silicone adhesive according to claim 1, wherein: the treating fluid in the second step comprises one or more mixtures of titanate, silane and alcohol/water solution of coupling agent.
4. The high displacement modified silicone adhesive according to claim 1, wherein: and the auxiliary materials in the third step comprise a methoxy group, an ethoxy group or other end-capped organic siloxane combination system, a flame retardant, a plasticizer, a rheological agent, a catalyst, an anti-aging agent and an inorganic filler.
5. The high displacement modified silicone adhesive according to claim 1, wherein: the heating temperature of the heating and stirring in the fifth step is controlled to be 25-90 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210451535.5A CN114716969A (en) | 2022-04-26 | 2022-04-26 | High-displacement modified silicone adhesive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210451535.5A CN114716969A (en) | 2022-04-26 | 2022-04-26 | High-displacement modified silicone adhesive |
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| Publication Number | Publication Date |
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| CN114716969A true CN114716969A (en) | 2022-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210451535.5A Pending CN114716969A (en) | 2022-04-26 | 2022-04-26 | High-displacement modified silicone adhesive |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020752A (en) * | 2009-09-09 | 2011-04-20 | 中国石油天然气股份有限公司 | Method of grafting and modifying rubber latex containing poly conjugated dialkene by in situ hybridization of silicon |
| CN109628058A (en) * | 2018-10-31 | 2019-04-16 | 北京天山新材料技术有限公司 | A kind of organic silicon adhesive |
| CN113337122A (en) * | 2021-06-28 | 2021-09-03 | 湖南航天三丰科工有限公司 | Dealcoholized room temperature curing silicone rubber with ultra-long storage life and preparation method thereof |
-
2022
- 2022-04-26 CN CN202210451535.5A patent/CN114716969A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102020752A (en) * | 2009-09-09 | 2011-04-20 | 中国石油天然气股份有限公司 | Method of grafting and modifying rubber latex containing poly conjugated dialkene by in situ hybridization of silicon |
| CN109628058A (en) * | 2018-10-31 | 2019-04-16 | 北京天山新材料技术有限公司 | A kind of organic silicon adhesive |
| WO2020089692A1 (en) * | 2018-10-31 | 2020-05-07 | Tonsan Adhesives, Inc | Silicone adhesive |
| CN113337122A (en) * | 2021-06-28 | 2021-09-03 | 湖南航天三丰科工有限公司 | Dealcoholized room temperature curing silicone rubber with ultra-long storage life and preparation method thereof |
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