CN113372833A - Flame-retardant waterproof composite adhesive tape and preparation method thereof - Google Patents
Flame-retardant waterproof composite adhesive tape and preparation method thereof Download PDFInfo
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
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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
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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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
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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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- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
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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
- C09J2483/00—Presence of polysiloxane
- C09J2483/006—Presence of polysiloxane in the substrate
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Abstract
The invention provides a flame-retardant waterproof composite adhesive tape, which comprises a reinforcing layer and an adhesive layer, wherein the reinforcing layer comprises the following materials in parts by weight: 20-80 parts of silica gel; 40-180 parts of a flame retardant additive; 10-60 parts of a reinforcing agent; 0-45 parts of an extender; 0.5-5 parts of irradiation crosslinking auxiliary agent; 0.5-5 parts of a coupling agent; 0.5-3 parts of a catalyst; the bonding layer comprises the following materials in parts by weight: 10-70 parts of silica gel; 0-40 parts of polyolefin rubber; 0.5-5.0 parts of tackifier; 40-170 parts of a flame retardant additive; 10-50 parts of a reinforcing agent; 0-100 parts of an extender; 0.2-7 parts of a coupling agent; 0.2-6 parts of a catalyst. The flame-retardant waterproof composite adhesive tape has good tensile winding property and waterproofness, and has long-term heat resistance, weather resistance, bonding type after curing and weather, rain and snow erosion resistance superior to those of the traditional waterproof insulating adhesive tape, obvious performance advantages and flame-retardant and fireproof performance.
Description
Technical Field
The invention relates to the technical field of cables, in particular to a flame-retardant waterproof composite adhesive tape and a preparation method thereof.
Background
The traditional flame-retardant fireproof adhesive tape is divided into self-adhesive and non-self-adhesive, the main raw materials are polyolefin rubber and plastic blend or silicon rubber, as described in chinese patent CN 111040455a, a single-layer self-adhesive flame-retardant fireproof adhesive tape using silicon rubber as a base material is prepared. However, the fireproof self-adhesive tape is in an elastic body state in the initial state, although the stretchability and the self-adhesive fusion property of the fireproof self-adhesive tape are still enough, the fireproof self-adhesive tape hardly sticks to a protected object, and the self-fusion property and the self-shape property of the tape in the elastic body state are obviously inferior to those of a clay-shaped substance, so that the fireproof self-adhesive tape only can play a role in flame retardance and fire resistance and cannot play a role in water resistance. And the traditional flame-retardant fireproof adhesive tape is also made of non-vulcanized rubber, has the problems of poor aging performance and high temperature resistance, and has poor long-term service performance.
Disclosure of Invention
The invention mainly aims to provide a flame-retardant waterproof composite adhesive tape, and aims to solve the problems that the existing flame-retardant fireproof adhesive tape cannot prevent water and is poor in performance.
In order to achieve the purpose, the invention provides a flame-retardant waterproof composite adhesive tape, which comprises a reinforcing layer and an adhesive layer which are mutually attached, wherein the reinforcing layer comprises the following material components in parts by weight:
the adhesive layer comprises the following material components in parts by weight:
optionally, the material components of the reinforcing layer include, in parts by weight:
the adhesive layer comprises the following material components in parts by weight:
optionally, the flame retardant additive is a halogen-containing flame retardant or a halogen-free flame retardant, and comprises 2 or more than 2 of decabromodiphenylethane, chlorinated paraffin, antimony trioxide, magnesium hydroxide and aluminum hydroxide.
Optionally, the silica gel is one or more of alpha, omega-hydroxyl-terminated polydimethylsiloxane or dihydroxy polydimethylsiloxane with dynamic viscosity of not less than 60 ten thousand at 25 ℃ and methyl vinyl silicone rubber with vinyl content of 0.15-1.5%.
Optionally, the polyolefin rubber composition is one or more of ethylene propylene rubber, butyl rubber, nitrile rubber, chloroprene rubber and fluororubber.
Optionally, the tackifier is one or more of a tackifying terpene resin, a silane coupling agent, and polyisobutylene.
Optionally, the reinforcing agent has a specific surface area of 150m2(ii) a fumed silica of greater than/g.
Optionally, the irradiation crosslinking auxiliary agent is selected from one or two of TAIC, TMPTMA and polyvinyl silicone oil.
Optionally, the coupling agent is selected from one or two of silane coupling agent and titanate coupling agent.
Optionally, the catalyst is selected from one of an organotin composition and a titanate composition.
The invention also provides a preparation method of the flame-retardant waterproof composite adhesive tape, which comprises the following steps:
the method comprises the following steps: preparation of an enhancement layer
Adding the material components except the coupling agent and the catalyst in the enhancement layer into a kneader to be kneaded and mixed for 1-3h, then vacuumizing for 0.5-3h at the temperature of 100-;
adding a coupling agent and a catalyst into the enhancement layer base rubber in a kneading machine, and kneading in a closed manner for 10-25min to obtain enhancement layer mixed base rubber;
extruding the reinforcing layer mixed base rubber through a neck mold of an extruder to obtain a semi-finished product of the reinforcing layer;
carrying out irradiation crosslinking on the semi-finished product of the enhancement layer under the irradiation absorption dose of a 10KGy-100Kgy cobalt source to obtain the outer layer of the flame-retardant waterproof composite adhesive tape;
step two: preparation of adhesive layer
Adding the material components of the bonding layer except the coupling agent and the catalyst into a kneader to be kneaded and mixed for 1-3h, then vacuumizing for 0.5-2h at the temperature of 100-150 ℃, wherein the vacuum degree is-0.05-0.1 MPA, and then thinly passing the mixed material through an open mill and discharging to obtain bonding layer base glue;
adding a coupling agent and a catalyst into the bonding layer base adhesive in a kneading machine, and hermetically kneading for 10-25min to obtain bonding layer mixed base adhesive;
placing the bonding layer mixed base rubber into an extruder to be extruded into sheets to obtain bonding layer semi-finished products;
step three: double-layer composite preparation of reinforced layer and adhesive layer
And (3) attaching the bonding layer semi-finished product to the irradiated enhancement layer semi-finished product through a rewinder to obtain the flame-retardant waterproof composite adhesive tape finished product.
According to the technical scheme, the outer layer of the conventional fireproof adhesive tape is replaced by the semi-crosslinked flame-retardant silica gel tape, the crosslinked flame-retardant silica gel tape is subjected to semi-crosslinking through irradiation, so that the product has certain initial strength during use and installation, can provide tensile winding performance and continuous holding force, and after the semi-crosslinked silica gel tape is installed, the outer layer of the semi-crosslinked silica gel tape can still absorb trace water vapor in the air for post-curing crosslinking, so that the effect of completely crosslinking vulcanized rubber is achieved, the self-fluxing property during stretching is achieved, and the long-term aging resistance is also achieved.
By replacing the conventional tacky butyl rubber layer with a flame retardant silicone-based adhesive layer having an initial tack, the layer possesses initial adhesion, filling properties, and waterproof sealing properties. After the installation is finished, the inner bonding layer can continuously absorb trace water in the air for curing and crosslinking to achieve the effect of vulcanized rubber, so that the inner bonding layer is bonded with an adhered object into a whole, the viscosity and the filling property required during installation are provided, and the problem of poor long-term aging resistance of the inner layer is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic view of the preparation process of the flame-retardant waterproof composite tape of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a flame-retardant waterproof composite adhesive tape which has flame-retardant and waterproof properties and can solve the problem of long-term aging resistance.
The invention provides a flame-retardant waterproof composite adhesive tape, which comprises a reinforcing layer and an adhesive layer which are mutually attached, wherein the reinforcing layer comprises the following material components in parts by weight: 20-80 parts of silica gel; 40-180 parts of a flame retardant additive; 10-60 parts of a reinforcing agent; 0-45 parts of an extender; 0.5-5 parts of irradiation crosslinking auxiliary agent; 0.5-5 parts of a coupling agent; 0.5-3 parts of a catalyst;
the adhesive layer comprises the following material components in parts by weight: 10-70 parts of silica gel; 0-40 parts of polyolefin rubber; 0.5-5.0 parts of tackifier; 40-170 parts of a flame retardant additive; 10-50 parts of a reinforcing agent; 0-100 parts of an extender; 0.2-7 parts of a coupling agent; 0.2-6 parts of a catalyst.
According to the technical scheme, the outer layer of the existing waterproof adhesive tape is replaced by the semi-crosslinking type flame-retardant silica gel tape, the crosslinking type flame-retardant silica gel tape is subjected to semi-crosslinking through irradiation, so that a product has certain initial strength during use and installation, tensile winding performance and continuous holding force can be provided, after the installation is finished, the outer layer of the semi-crosslinking type silica gel tape can still absorb trace water vapor in air for post-curing crosslinking, the effect of completely crosslinking vulcanized rubber is achieved, the self-fluxing performance during stretching is achieved, and the long-term aging resistance is also achieved.
By replacing the conventional tacky butyl rubber layer with a flame retardant silicone-based adhesive layer having an initial tack, the layer possesses initial adhesion, filling properties, and waterproof sealing properties. After the installation is finished, the inner bonding layer can continuously absorb trace water in the air for curing and crosslinking to achieve the effect of vulcanized rubber, so that the inner bonding layer is bonded with an adhered object into a whole, the viscosity and the filling property required during installation are provided, and the problem of poor long-term aging resistance of the inner layer is solved.
The flame-retardant waterproof composite adhesive tape has the advantages that the flame retardance of the inner layer and the outer layer can reach the flame-retardant V0-grade standard, the inner layer is made of a silica gel-based clay-like substance before moisture curing, the filling property and the shape property are better while the flame retardance is met, the adhesion property of a protected object is excellent, the fireproof and waterproof performance requirements can be met, the inner layer and the outer layer can be continuously reacted and crosslinked within one week after the tape is installed, the composite gapless vulcanized adhesive tape is formed, the aging performance and the adhesion performance are obviously superior to those of the traditional adhesive tape, and the performance advantage is obvious.
The flame-retardant waterproof composite adhesive tape can meet the requirements of waterproof, flame-retardant and fireproof after being installed, the inner layer and the outer layer can be continuously vulcanized and crosslinked within one week after installation to form a completely vulcanized and crosslinked silica gel-based vulcanized tape, and the flame-retardant waterproof composite adhesive tape has excellent aging performance, waterproof performance and bonding performance, can meet the performance requirements of the existing waterproof and fireproof adhesive tape, and can solve the problem of long-term aging resistance.
Optionally, the material components of the reinforcing layer include, in parts by weight: 60-80 parts of silica gel; 50-90 parts of a flame retardant additive; 15-35 parts of a reinforcing agent; 0-45 parts of an extender; 0.5-3 parts of irradiation crosslinking auxiliary agent; 0.5-3 parts of a coupling agent; 0.5-2.5 parts of a catalyst;
the adhesive layer comprises the following material components in parts by weight: 20-70 parts of silica gel; 0-25 parts of polyolefin rubber; 0.5-5.0 parts of tackifier; 60-100 parts of a flame retardant additive; 10-30 parts of a reinforcing agent; 0-100 parts of an extender; 2.0-4.5 parts of a coupling agent; and 2-4 parts of a catalyst.
Optionally, the flame retardant additive is a halogen-containing flame retardant or a halogen-free flame retardant, and comprises 2 or more than 2 of decabromodiphenylethane, chlorinated paraffin, antimony trioxide, magnesium hydroxide and aluminum hydroxide.
Decabromodiphenyl ethane is a novel, broad-spectrum, efficient and environment-friendly additive type flame retardant developed and produced in recent years, and has the characteristics of heat resistance, light resistance, difficult dialysis property and the like superior to that of decabromodiphenyl ether. The decabromodiphenylethane has no toxicity and no teratogenicity to organisms. Decabromodiphenylethane is quite stable in the system used, and the thermoplastic plastics flame-retarded by the decabromodiphenylethane can be recycled.
The chlorinated paraffin has the advantages of low volatility, flame retardance, good electrical insulation, low price and the like, and can be used as a flame retardant and a polyvinyl chloride auxiliary plasticizer.
Antimony trioxide belongs to an additive flame retardant, and is often used together with other flame retardants and smoke suppressants, and a synergistic effect can be generated among the components. Antimony trioxide melts first at the beginning of combustion to form a protective film on the surface of the material to isolate air, and the combustion temperature is reduced through an internal endothermic reaction. The antimony trioxide is gasified at high temperature to dilute the oxygen concentration in the air, thereby playing a role in flame retardance.
Magnesium hydroxide is an excellent flame retardant for plastic and rubber products. Magnesium hydroxide is a novel filling type flame retardant, releases bound water when being heated and decomposed, absorbs a large amount of latent heat to reduce the surface temperature of a synthetic material filled with the magnesium hydroxide in flame, and has the effects of inhibiting the decomposition of a polymer and cooling generated combustible gas. The magnesium oxide generated by decomposition is a good refractory material, and can also help to improve the fire resistance of the synthetic material, and the water vapor emitted by the magnesium oxide can also be used as a smoke suppressant. Magnesium hydroxide is a well-known excellent flame retardant with triple functions of flame retardance, smoke suppression and filling in the rubber and plastic industry. The product can be widely used in high polymer materials such as rubber, chemical industry, building materials, plastics, electronics, unsaturated polyester, paint, coating and the like.
Aluminum hydroxide is the largest and most widely used inorganic flame retardant additive. The aluminum hydroxide serving as a flame retardant can not only resist flame, but also prevent fuming, does not produce drippings and does not produce toxic gas.
Optionally, the silica gel is one or more of alpha, omega-hydroxyl-terminated polydimethylsiloxane or dihydroxy polydimethylsiloxane with dynamic viscosity of not less than 60 ten thousand at 25 ℃ and methyl vinyl silicone rubber with vinyl content of 0.15-1.5%.
Optionally, the polyolefin rubber composition is one or more of ethylene propylene rubber, butyl rubber, nitrile rubber, chloroprene rubber and fluororubber.
The ethylene propylene rubber has excellent weather resistance, ozone resistance, heat resistance, acid and alkali resistance, water vapor resistance, color stability, electrical property, oil filling property and normal temperature fluidity. The ethylene-propylene rubber product can be used for a long time at 120 ℃.
Optionally, the tackifier is one or more of a tackifying terpene resin, a silane coupling agent, and polyisobutylene.
Optionally, the strengthening agent is a specific surfaceProduct of 150m2(ii) a fumed silica of greater than/g.
Specifically, the white carbon black is classified into precipitated white carbon black and gas phase white carbon black according to the production method. The fumed silica is white amorphous flocculent white carbon black transparent solid colloidal nano particles (the particle size is less than 100nm) in a normal state, is nontoxic and has a huge specific surface area. The fumed silica is completely nano silicon dioxide, the product purity can reach 99%, the particle size can reach 10-20 nm, but the preparation process is complex and the price is high. The precipitated silica is classified into conventional precipitated silica and special precipitated silica, the former is prepared from sulfuric acid, hydrochloric acid, and CO2The silicon dioxide produced by taking water glass as a basic raw material refers to the silicon dioxide produced by adopting a special method such as a supergravity technology, a sol-gel method, a chemical crystal method, a secondary crystallization method or a reversed-phase micelle microemulsion method. The precipitated white carbon black is mainly used as a reinforcing agent of natural rubber and synthetic rubber, a toothpaste friction agent and the like. The fumed silica is mainly used as a reinforcing agent, a coating and an unsaturated resin thickener of silicone rubber.
Optionally, the extender is one or more selected from light calcium carbonate, pottery clay, wollastonite and mica powder.
Optionally, the irradiation crosslinking auxiliary agent is selected from one or two of TAIC, TMPTMA and polyvinyl silicone oil.
Specifically, TAIC is triallyl isocyanurate, and TAIC is widely used as a co-crosslinking agent for peroxide crosslinking or radical reaction crosslinking. Can be used as co-vulcanizing agent (used together with DCP, and its general dosage is 0.5-4%) for special rubbers of ethylene-propylene rubber, various fluororubbers and CPE, etc., and can obviously shorten vulcanizing time, raise strength, wear resistance, solvent resistance and corrosion resistance.
Specifically, TMPTMA is trimethylolpropane trimethacrylate, is a chemical intermediate, can be used as an auxiliary crosslinking agent in peroxide crosslinking, and is suitable for mixing butadiene rubber, ethylene propylene diene monomer, isoprene rubber, butyl rubber and nitrile rubber.
Specifically, the polyvinyl silicone oil is a product obtained by substituting part of methyl groups in methyl silicone oil with ethylene groups, and the vinyl silicone oil can be divided into: the vinyl-terminated silicone oil and the vinyl silicone oil are main raw materials of addition type liquid silicone rubber, organic silicone gel and the like; modifier/plastic additive/reinforcing material of the rubber compound, and the like. And the polyvinyl silicone oil is divinyl end-capped or methyl end-capped polydimethylsiloxane with vinyl in the middle chain, so that the product quality is stable, the volatile matter is low, and the polyvinyl silicone oil is not yellow and crosslinked. Is the main raw materials of addition type liquid silicon rubber, organic silicon potting material, silicon gel and the like, a modifier of rubber compound, a plastic additive and the like.
Optionally, the coupling agent is selected from one or two of silane coupling agent and titanate coupling agent.
Specifically, the molecular structural formula of the silane coupling agent is generally Y-R-Si (OR)3(wherein Y-an organofunctional group, SiOR-a siloxy group). The siloxy group is reactive with inorganic species and the organofunctional group is reactive or compatible with organic species. Thus, when a silane coupling agent intervenes between the inorganic and organic interfaces, a bonding layer of organic matrix-silane coupling agent-inorganic matrix may be formed. Typical silane coupling agents include vinyltriethoxysilane, vinyltrimethoxysilane, vinyltris (. beta. -methoxyethoxy) silane, methyltriethoxysilane, 3-aminopropyltriethoxysilane (KH550), and the like.
Optionally, the catalyst is selected from one of an organotin compound and a titanate compound.
Specifically, the common organic tin compounds are dibutyltin dilaurate, stannous octoate, dibutyltin bis (dodecyl sulfide), dibutyltin diacetate and the like.
Specifically, the titanate catalyst is mainly used for preparing adhesives of metal and rubber and metal and plastic. Because of its high activity, the product is an excellent adhesion promoter if the reactive groups of the binder resin are less active. It can also be used as catalyst for ester exchange reaction, esterification reaction and condensation reaction, and raw material for pharmaceutical industry. The catalyst has higher stereoselectivity and benefit when being used as a Ziegler (Ziegler Natta) catalyst in polymerization reactions (such as PE, PP and the like).
The invention also provides a preparation method of the flame-retardant waterproof composite adhesive tape, which comprises the following steps:
the method comprises the following steps: preparation of an enhancement layer
Adding the material components except the coupling agent and the catalyst in the enhancement layer into a kneader to be kneaded and mixed for 1-3h, then vacuumizing for 0.5-3h at the temperature of 100-;
adding a coupling agent and a catalyst into the enhancement layer base rubber in a kneading machine, and kneading in a closed manner for 10-25min to obtain enhancement layer mixed base rubber;
extruding the reinforcing layer mixed base rubber through a neck mold of an extruder to obtain a semi-finished product of the reinforcing layer;
carrying out irradiation crosslinking on the semi-finished product of the enhancement layer under the irradiation absorption dose of a 10KGy-100Kgy cobalt source to obtain the outer layer of the flame-retardant waterproof composite adhesive tape;
step two: preparation of adhesive layer
Adding the material components of the bonding layer except the coupling agent and the catalyst into a kneader to be kneaded and mixed for 1-3h, then vacuumizing for 0.5-2h at the temperature of 100-150 ℃, wherein the vacuum degree is-0.05-0.1 MPA, and then thinly passing the mixed material through an open mill and discharging to obtain bonding layer base glue;
adding a coupling agent and a catalyst into the bonding layer base adhesive in a kneading machine, and hermetically kneading for 10-25min to obtain bonding layer mixed base adhesive;
placing the bonding layer mixed base rubber into an extruder to be extruded into sheets to obtain bonding layer semi-finished products;
step three: double-layer composite preparation of reinforced layer and adhesive layer
And (3) attaching the bonding layer semi-finished product to the irradiated enhancement layer semi-finished product through a rewinder to obtain the flame-retardant waterproof composite adhesive tape finished product.
Embodiments of the present invention will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
The reinforcing layer material of the flame-retardant waterproof composite tape of example 1 comprises the following components in parts by weight: 20 parts of hydroxyl-terminated polydimethylsiloxane, 50 parts of methyl vinyl silicone rubber, 25 parts of decabromodiphenylethane, 25 parts of antimony trioxide, 15 parts of white carbon black, 20 parts of calcium carbonate, 2 parts of polyvinyl silicone oil, 2.5 parts of methyl triethoxysilane and 1.5 parts of titanate catalyst;
the adhesive layer material comprises the following components in parts by weight: 60 parts of hydroxyl-terminated polydimethylsiloxane, 5 parts of butyl rubber, 75 parts of decabromodiphenylethane, 75 parts of antimony trioxide, 20 parts of white carbon black, 30 parts of calcium carbonate, 4.5 parts of methyl triethoxysilane, 2.5 parts of titanate catalyst and 2.78 parts of KH 5502.5.
The production and preparation method of the flame-retardant waterproof composite tape of the embodiment 1 mainly comprises three aspects, which are briefly described as follows:
step one, preparing an outer reinforcing layer
(1) Putting 20 parts of hydroxyl-terminated polydimethylsiloxane, 50 parts of methyl vinyl silicone rubber, 25 parts of decabromodiphenylethane, 25 parts of antimony trioxide, 15 parts of white carbon black, 20 parts of calcium carbonate and 2 parts of polyvinyl silicone oil into a kneader to be kneaded and mixed for 2 hours, then vacuumizing for 1 hour at the temperature of 120 ℃ and the vacuum degree range of-0.05 to-0.1 MPA, then thinly passing the mixed materials through an open mill, discharging to obtain enhancement layer base rubber, and cooling for more than 12 hours for later use;
(2) adding 2.5 parts of methyltriethoxysilane and 1.5 parts of titanate catalyst into the reinforced layer base adhesive in a kneading machine, kneading in a closed manner for 10-25min, taking out of the pot, and carrying out vacuum packaging for later use to obtain the reinforced layer mixed base adhesive;
(3) extruding the mixed base glue of the enhancement layer through a neck mold of an extruder, attaching a layer of isolating film, then coiling, vacuumizing and packaging for later use, and placing the extruder in a glass cover closed chamber with controlled humidity in the production process to prevent the base glue from being solidified before wet gas in the air is extracted to influence the subsequent production;
(4) and (3) carrying out irradiation crosslinking on the semi-finished product after vacuum packaging under the irradiation absorption dose of a 30Kgy cobalt source to obtain the irradiation crosslinking type flame-retardant waterproof composite adhesive tape outer layer with controllable initial strength.
Step two, inner layer adhesive layer preparation process
(1) 60 parts of hydroxyl-terminated polydimethylsiloxane, 5 parts of butyl rubber, 75 parts of decabromodiphenylethane, 75 parts of antimony trioxide, 20 parts of white carbon black, 30 parts of calcium carbonate and 75 parts of KH 5502.5 are put into a kneading machine to be kneaded and mixed for 2 hours, then the kneading machine is vacuumized for 1 hour at the temperature of 120 ℃ with the vacuum degree ranging from-0.05 to-0.1 MPA, then the mixed materials are thinly passed through an open mill and are discharged to obtain bonding layer base rubber, and the bonding layer base rubber is reserved after vacuum packaging;
(2) adding 4.5 parts of methyltriethoxysilane and 2.5 parts of titanate catalyst into the adhesive layer base rubber in a kneading machine, kneading in a closed manner for 10-25min, taking out of the pot to obtain adhesive layer rubber compound, and carrying out vacuum packaging for later use;
step three, double-layer composite preparation process
(1) And (3) placing the bonding layer rubber compound after vacuum packaging in an extruder to extrude into a sheet, attaching the sheet to the outer layer of the irradiated semi-finished product through a rewinding machine, attaching an isolation film, and performing vacuum packaging after winding to obtain the finished product of the flame-retardant waterproof composite adhesive tape in the embodiment 1.
The formulation of the reinforcing layer of the flame-retardant waterproof composite tape according to each example of the present invention is shown in table 1, the formulation of the adhesive layer is shown in table 2, and the flame-retardant waterproof composite tapes according to other examples 2 to 5 were prepared according to the material formulations of tables 1 and 2 and with reference to the preparation method of the flame-retardant waterproof composite tape of example 1.
TABLE 1 reinforced layer formulation of flame retardant waterproof composite tape according to various embodiments of the present invention
TABLE 2 formulation of adhesive layer of flame retardant waterproof composite tape according to each example of the present invention
Performance testing
The flame-retardant waterproof composite tapes of examples 1 to 5 obtained above were subjected to tensile strength, elongation at break, puncture strength, dielectric constant, dielectric loss, post-installation waterproof property test, post-moisture-curing waterproof property test, installation property, adhesive bleeding property, and thermal aging resistance test, respectively, and part of the property test methods were as follows.
1. Post-installation water resistance test
After the composite adhesive tape product is stretched by 200% and is wound on a connector assembly in a half lap joint mode, the connector assembly is immediately placed into water with the depth of 1 meter for soaking for 72 hours, and after the connector assembly is taken out, whether the surface of a sample is physically damaged or not and whether the protected connecting assembly has a water seepage phenomenon or not are observed, and if not, the test is passed; otherwise, the test fails.
2. Water resistance test after moisture curing
After the composite adhesive tape product is stretched by 200% and is wound on a connector assembly in a half lap joint mode, the connector assembly is placed in a room temperature environment for 7d moisture curing, then the connector assembly is placed in water with the depth of 1 meter for soaking for 72h, and after the connector assembly is taken out, whether the physical damage phenomenon exists on the surface of a sample or not and whether the water seepage phenomenon exists on a protected connecting assembly or not are observed, and if the physical damage phenomenon does not exist, the test is passed; otherwise, the test fails.
3. Thermal aging resistance
After the flame-retardant waterproof composite tape product is stretched by 200% and is wound on a connector assembly in a half lap joint mode, the connector assembly is placed in a room-temperature environment for 7d (moisture curing time), and after the connector assembly is placed in an air circulation oven at 160 ℃ for a week, the connector assembly is taken out and the surface cracking phenomenon and the bonding change condition of an adhesive layer are observed.
Comparative examples were a commercially available flameproof adhesive tape and a 3M2228 waterproof insulating composite adhesive tape, and the above-mentioned performance indexes were also tested.
The test results of the flame-retardant waterproof composite adhesive tape and the comparative example of each example are shown in table 3, and according to table 3, the flame retardant performance and the waterproof performance of the flame-retardant waterproof composite adhesive tape of each example after moisture curing are both passed, the waterproof performance of the commercially available fireproof adhesive tape of the comparative example is not passed, the fireproof performance of the waterproof insulating composite adhesive tape of comparative example 3M2228 is not passed, the flame-retardant waterproof composite adhesive tape of each example has no obvious change after the thermal aging resistance test, and the adhesion is good, so that the flame-retardant waterproof composite adhesive tape obtained by the embodiment of the invention is proved to be convenient to install and good in flame retardant, waterproof and thermal aging resistance.
TABLE 3 flame retardant and waterproof composite tape of each example and comparative example Performance test results
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The flame-retardant waterproof composite adhesive tape is characterized by comprising a reinforcing layer and an adhesive layer which are mutually attached, wherein the reinforcing layer comprises the following material components in parts by weight:
the adhesive layer comprises the following material components in parts by weight:
2. the flame-retardant waterproof composite tape according to claim 1, wherein the material components of the reinforcing layer comprise, in parts by weight:
the adhesive layer comprises the following material components in parts by weight:
3. the flame-retardant waterproof composite tape according to claim 1, wherein the flame-retardant additive is a halogen-containing flame retardant or a halogen-free flame retardant comprising 2 or more than 2 compounds selected from decabromodiphenylethane, chlorinated paraffin, antimony trioxide, magnesium hydroxide and aluminum hydroxide.
4. The flame-retardant waterproof composite tape according to claim 2, wherein the silica gel is one or more of α, ω -hydroxy-terminated polydimethylsiloxane having a kinematic viscosity of not less than 60 ten thousand at 25 ℃ or dihydroxy polydimethylsiloxane, and methyl vinyl silicone rubber having a vinyl content of 0.15% to 1.5%.
5. The flame-retardant waterproof composite tape according to claim 3, wherein the polyolefin rubber composition is one or more of ethylene propylene rubber, butyl rubber, nitrile rubber, chloroprene rubber and fluororubber; the tackifier is one or more of tackifying terpene resin, silane coupling agent and polyisobutylene.
6. As claimed in claim5 the flame-retardant waterproof composite adhesive tape is characterized in that the reinforcing agent has a specific surface area of 150m2(ii) a fumed silica of greater than/g.
7. The flame-retardant waterproof composite tape according to claim 6, wherein the irradiation crosslinking assistant is one or two selected from TAIC, TMPTMA and polyvinyl silicone oil.
8. The flame-retardant waterproof composite tape according to claim 7, wherein the coupling agent is one or two selected from silane coupling agents and titanate coupling agents.
9. The flame-retardant waterproof composite tape according to claim 8, wherein the catalyst is one selected from the group consisting of an organotin composition and a titanate composition.
10. The preparation method of the flame-retardant waterproof composite adhesive tape is characterized by comprising the following steps:
the method comprises the following steps: preparation of an enhancement layer
Adding the material components except the coupling agent and the catalyst in the enhancement layer into a kneader to be kneaded and mixed for 1-3h, then vacuumizing for 0.5-3h at the temperature of 100-;
adding a coupling agent and a catalyst into the enhancement layer base rubber in a kneading machine, and kneading in a closed manner for 10-25min to obtain enhancement layer mixed base rubber;
extruding the reinforcing layer mixed base rubber through a neck mold of an extruder to obtain a semi-finished product of the reinforcing layer;
carrying out irradiation crosslinking on the semi-finished product of the enhancement layer under the irradiation absorption dose of a 10KGy-100Kgy cobalt source to obtain the outer layer of the flame-retardant waterproof composite adhesive tape;
step two: preparation of adhesive layer
Adding the material components of the bonding layer except the coupling agent and the catalyst into a kneader to be kneaded and mixed for 1-3h, then vacuumizing for 0.5-2h at the temperature of 100-150 ℃, wherein the vacuum degree is-0.05-0.1 MPA, and then thinly passing the mixed material through an open mill and discharging to obtain bonding layer base glue;
adding a coupling agent and a catalyst into the bonding layer base adhesive in a kneading machine, and hermetically kneading for 10-25min to obtain bonding layer mixed base adhesive;
placing the bonding layer mixed base rubber into an extruder to be extruded into sheets to obtain bonding layer semi-finished products;
step three: double-layer composite preparation of reinforced layer and adhesive layer
And (3) attaching the bonding layer semi-finished product to the irradiated enhancement layer semi-finished product through a rewinder to obtain the flame-retardant waterproof composite adhesive tape finished product.
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