CN111040724B - Adhesive for crosslinked polyethylene and silicone rubber, preparation method and use method - Google Patents
Adhesive for crosslinked polyethylene and silicone rubber, preparation method and use method Download PDFInfo
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- CN111040724B CN111040724B CN201911403092.7A CN201911403092A CN111040724B CN 111040724 B CN111040724 B CN 111040724B CN 201911403092 A CN201911403092 A CN 201911403092A CN 111040724 B CN111040724 B CN 111040724B
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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
- C09J11/02—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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
- C09J5/04—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving separate application of adhesive ingredients to the different surfaces to be joined
Abstract
The invention relates to the field of adhesives, in particular to an adhesive for crosslinking polyethylene and silicone rubber, a preparation method and a use method thereof. The technical scheme is characterized by comprising A and B, wherein the A comprises the following components in parts by weight: 100 parts of a base polymer, 10-25 parts of a base crosslinking agent, 10-30 parts of an additional crosslinking agent and 5-15 parts of a filler; the B comprises the following components in parts by weight: 100 parts of base polymer, 5-15 parts of filler and 0.2-0.5 part of catalyst; wherein, the basic polymer in A and B is hydroxyl silicone oil. The adhesive can be crosslinked with crosslinked polyethylene and silicon rubber, so that the crosslinked polyethylene and the silicon rubber can be bonded to repair scratches and air gaps on the main insulation of the cable, and water vapor can be prevented from permeating from the wire core and the outside along the compression interface to cause breakdown accidents, and the reliability and the stability of the cable during operation are improved.
Description
Technical Field
The invention relates to the field of adhesives, in particular to an adhesive for crosslinking polyethylene and silicone rubber, a preparation method and a use method thereof.
Background
The crosslinked polyethylene is widely used in a power distribution network by virtue of the advantages of reasonable structure, excellent electrical performance and the like, and has gradually replaced the traditional oil paper insulation structure cable. However, the insulation defects of the XLPE cable are caused by factors such as rough cable manufacturing technology, poor construction process, artificial damage, poor operation environment and the like, and the insulation performance of the XLPE cable is affected. The national grid company system has counted the operation faults and defects of the power cable equipment, and the statistical data shows that: over 95% of power cable line operation faults are caused by the fact that the quality of the cable accessory installation personnel is not up to standard.
Due to limited transportation conditions, power cables are usually produced on 500 m shafts, and when the cable length required on site is more than 500 m, two cables are connected by making an intermediate joint. The intermediate joint is mainly used for recovering a three-layer structure of a conductor, an insulating layer and a sheath of the power cable. At present, in the installation process of the intermediate joint, if the cable is scratched when the insulation of the cable is stripped, the air gap defect of the intermediate joint of the cable is caused after the cable is scratched.
When the voltage reaches the discharge voltage of the air gap, discharge occurs, a large amount of neutral gas molecules are ionized in the discharge process to form a large amount of space charges, reverse voltage opposite to the direction of the applied voltage is generated, and the stability of high-voltage electricity transmission is influenced.
At present, an improved installation process of a 10kV three-core cable cold-shrink intermediate joint is disclosed in a Chinese patent with an authorization publication number of CN105244817B, and comprises the following steps: (1) stripping off the outer sheath of the cable, the steel strip, the inner protection layer and the fillers among the wire cores according to the size; (2) stripping the copper shield and the outer semi-conducting layer of the cable by size; (3) cleaning the main insulation of the cable; (4) crimping a copper connecting rod, respectively sleeving a cold-shrink joint and a copper shielding net sleeve, crimping a copper connecting pipe and two end leads by using hydraulic pliers, and winding a copper conductor by using a semi-conductive adhesive tape until the copper conductor is flush with the main insulation height; (5) coating a special polyethylene adhesive; (6) coating a double-component RTV; (7) installing a cold-shrink joint; (8) sleeving a copper shielding net sleeve and lapping a flat copper braided belt; (9) and waterproof protection and mechanical protection are performed. The invention adopts the process of coating the special adhesive for polyethylene and RTV to replace the traditional silicone grease coating process, can effectively smooth the cross-linked polyethylene insulation surface layer, improves the insulation performance of accessories, saves raw material and material consumption and improves the working efficiency.
The technology of coating the special polyethylene adhesive and the RTV is used for replacing the traditional silicone grease coating technology, the original one-step process is added into two processes, the technology is complex, and the installation efficiency is low.
Disclosure of Invention
The first purpose of the invention is to provide an adhesive for crosslinking polyethylene and silicone rubber, which has the advantages of bonding the crosslinked polyethylene and the silicone rubber, having excellent waterproofness, insulativity, weather resistance and flexibility, and being capable of repairing scratches on an insulating layer.
The technical purpose of the invention is realized by the following technical scheme:
an adhesive for crosslinking polyethylene and silicone rubber, which comprises A and B, and is characterized in that: the A comprises the following components in parts by weight: 100 parts of a base polymer, 10-25 parts of a base crosslinking agent, 10-30 parts of an additional crosslinking agent and 5-15 parts of a filler;
the basic cross-linking agent is one or more of methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane and aminopropyltrimethoxysilane;
the B comprises the following components in parts by weight: 100 parts of base polymer, 5-15 parts of filler and 0.2-0.5 part of catalyst;
wherein, the basic polymer in A and B is hydroxyl silicone oil.
By adopting the technical scheme, the crosslinked polyethylene contains part of modified silane groups, and the adhesive is contacted with the crosslinked polyethylene. Under the action of a catalyst, the modified silane group can perform certain crosslinking reaction with the hydroxyl silicone oil, the basic crosslinking agent and the additional crosslinking agent, and the terminal hydroxyl of the hydroxyl silicone oil has the reactivity and generates condensation reaction with the alkoxy compound to combine into macromolecules by covalent bonds, so that the adhesive can be connected with the crosslinked polyethylene part into a whole after being solidified.
The cold-shrink joint is made of silicon rubber, and the silicon rubber and the adhesive are integrally the same substances in the whole components, so that the cold-shrink joint can be integrated with the silicon rubber by the similarity and intermiscibility principle. Silicone rubbers, although high polymers, still contain some unreacted groups and can therefore also undergo some crosslinking with adhesives.
Therefore, under the dual functions of the crosslinking reaction and the condensation reaction, the adhesive can bond the main insulation made of crosslinked polyethylene and the cold-shrink joint made of silicon rubber into a whole, and the stability and the reliability of the cable structure are improved. Meanwhile, due to the occurrence of a crosslinking reaction and a condensation reaction, the adhesive can be mutually permeated with the outer surface of the main insulation and the inner surface of the cold-shrink joint, so that the adhesive can fill and repair micro scratches or pores on the outer surface of the main insulation and the inner surface of the cold-shrink joint, the air gap defect is avoided, and the use stability of the cable is improved.
Meanwhile, the adhesive has good waterproof performance, and the cable has excellent antifouling flashover resistance after being coated. Therefore, other waterproof treatment is not needed, the use is convenient, the process is simple, and the installation efficiency of the cable is improved.
Preferably, the additional crosslinking agent in A is one or more of isocyanatopropyltriethoxysilane, vinyltriisopropenoxysilane, methyltriisopropenyltriethoxysilane, phenyltriisopropenoxysilane, tetramethylguanidinopropyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyltriethoxysilane, gamma-methacryloxypropyltrimethoxysilane, anilinomethyltrimethoxysilane, anilinomethyltriethoxysilane, aminoethylaminopropylmethyldimethoxysilane, diethylaminomethyltriethoxysilane, gamma-methacryloxypropyltrimethoxysilane, and gamma-methacryloxypropylmethyldimethoxysilane.
By adopting the technical scheme, the additional cross-linking agent provides sufficient alkoxy compound, so that the condensation reaction with the terminal hydroxyl is facilitated.
Preferably, the filler in A and B is fumed silica.
By adopting the technical scheme, the fumed silica is an important nanoscale inorganic raw material, has small particle size, large specific surface area, good dispersion performance, stability and reinforcement, can effectively improve the strength of the adhesive after curing, can be used as a carrier of the catalyst, and can uniformly disperse the catalyst into other components by utilizing the excellent dispersibility of the catalyst, so that the reaction efficiency is improved.
Preferably, fumed silica is specifically hydrophobic fumed silica.
By adopting the technical scheme, the hydrophobic fumed silica surface is connected with unhydrolyzed methyl groups to show hydrophobicity. Therefore, the dielectric property of the adhesive can be improved by adding the hydrophobic fumed silica, so that the dielectric properties of the insulating layer and the middle joint can be improved when the adhesive is coated on the insulating layer and the middle joint of the cable. Meanwhile, the hydrophobic fumed silica is added, so that the curing speed of the adhesive in water can be slowed down, and the effective period of the adhesive is prolonged.
Preferably, the catalyst in B is an organotin chelate or organotitanium or guanidinium catalyst or a silane catalyst.
By adopting the technical scheme, the organic tin chelate or organic titanium or guanidino catalyst or silane catalyst plays a role in catalyzing the crosslinking reaction or condensation reaction of the adhesive and the crosslinked polyethylene and silicon rubber.
Preferably, the parts by weight of the base crosslinker in a are as follows: the weight parts of the basic cross-linking agent in A are as follows:
2-10 parts of methyltrimethoxysilane;
2-10 parts of methyltriethoxysilane;
2-10 parts of vinyl trimethoxy silane;
2-10 parts of vinyl triethoxysilane;
2-10 parts of phenyltrimethoxysilane;
2-10 parts of phenyltriethoxysilane;
2-5 parts of aminopropyl trimethoxy silane.
Preferably, the additional crosslinking agent in a is in the following parts by weight:
2-5 parts of isocyanatopropyl triethoxysilane;
2-5 parts of vinyl triisopropenoxysilane;
2-5 parts of methyl triisopropenoxysilane;
2-5 parts of phenyl triisopropenoxysilane;
2-5 parts of tetramethylguanidinopropyltrimethoxysilane;
2-5 parts of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane;
2-5 parts of gamma- (2, 3-epoxypropoxy) propyltriethoxysilane;
2-5 parts of gamma-methacryloxypropyltrimethoxysilane;
2-5 parts of aniline methyl trimethoxy silane;
2-5 parts of aniline methyl triethoxysilane;
2-5 parts of aminoethyl aminopropyl methyl dimethoxy silane;
2-5 parts of diethylaminomethyl triethoxysilane,
2-5 parts of gamma-methacryloxypropyltrimethoxysilane,
2-5 parts of gamma-methacryloxypropyl methyldimethoxysilane.
By adopting the technical scheme, the base crosslinking agent and the additional crosslinking agent can obtain better bonding strength in such a proportion.
The second purpose of the invention is to provide a preparation method of the adhesive for crosslinking polyethylene and silicon rubber.
Preferably, the preparation method of the adhesive for crosslinking polyethylene and silicone rubber comprises the following steps:
preparation of A:
SA-1, weighing the components in the A in proportion;
SA-2, adding the basic polymer and the basic cross-linking agent in the A, and mixing at low pressure;
SA-3, adding additional cross-linking agent and continuing stirring;
SA-4, adding a filler and stirring;
SA-5, vacuumizing, sealing and storing;
b, preparation:
SB-1, weighing the components in the B in proportion;
SB-2, adding the basic polymer in B, stirring under low pressure;
SB-3, adding a filler and stirring;
SB-4, adding a catalyst and mixing;
and SB-5, vacuumizing, sealing and storing.
By adopting the technical scheme, in the process of preparing the A, A, B are prepared respectively and are stored in a vacuum-pumping mode respectively, so that the A, B after preparation is prevented from being solidified due to contact with air, and the validity period of A, B storage is prolonged.
Preferably, the pressure of the low-pressure stirring in the SA-2 and SB-2 is 0.1Pa
Preferably, the vacuum is applied to SA-3, SA-4, SB-3 and SB-4 while an excess amount of dry inert gas is introduced.
Through adopting above-mentioned technical scheme, the air quantity in the stirring environment has been reduced in the low pressure stirring to oxygen and moisture content in the stirring environment have been reduced, let in excessive dry inert gas can further reduce the moisture and the content of oxygen in the stirring environment, thereby guaranteed A, B and kept stable.
Preferably, after A, B is prepared, B is added into A to form a premixed adhesive, and the premixed adhesive is sealed and stored.
By adopting the technical scheme, A, B is pre-mixed and then stored, so that the use in the future is convenient. When in use, the water-soluble adhesive can be directly used without mixing, and is simple to operate, convenient and quick.
The third purpose of the invention is to provide a method for using the adhesive for crosslinking polyethylene and silicon rubber.
A method for using an adhesive for crosslinking polyethylene and silicone rubber comprises the following steps:
SC-1, uniformly mixing A and B at normal temperature to form an adhesive;
SC-2, uniformly coating an adhesive on the surface of the crosslinked polyethylene material and the surface of the silicone rubber material within 15 minutes, and then pressing one side of the crosslinked polyethylene material coated with the adhesive and one side of the silicone rubber material coated with the adhesive;
and SC-3, waiting for curing at normal temperature.
By adopting the technical scheme, the cross-linked polyethylene and the silicon rubber can be firmly bonded through the adhesive, and tiny scratches or pores of the cross-linked polyethylene and the silicon rubber are filled and repaired, so that the air gap defect is avoided, and the use stability of the cable is improved.
A method for using an adhesive for crosslinking polyethylene and silicone rubber comprises the following steps:
SD-1, after the premixed adhesive is started, uniformly coating the adhesive on the surface of the crosslinked polyethylene material and the surface of the silicone rubber material within 15 minutes, and then pressing one surface of the crosslinked polyethylene material coated with the adhesive and one surface of the silicone rubber material coated with the adhesive;
SD-2, waiting for curing at normal temperature.
By adopting the technical scheme, the mixing of A and B is not needed when the device is used, so that the operation is simple and the use is convenient. The adhesive can firmly bond the crosslinked polyethylene and the silicon rubber, and small scratches or pores of the crosslinked polyethylene and the silicon rubber are filled and repaired, so that the air gap defect is avoided, and the use stability of the cable is improved.
In conclusion, the invention has the following beneficial effects:
1. the modified silane group can generate certain crosslinking reaction with the hydroxyl silicone oil, the basic crosslinking agent and the additional crosslinking agent, and the terminal hydroxyl of the hydroxyl silicone oil has the reactivity and generates condensation reaction with the alkoxy compound to combine into macromolecules by covalent bonds, so that the adhesive can be connected with the crosslinked polyethylene part into a whole after being solidified;
2. the silicone rubber and the adhesive are integrally the same substances in terms of the whole components, so that the silicone rubber and the adhesive can be integrated with the silicone rubber by the principle of similarity and intermiscibility. Although the silicone rubber is a high polymer, the silicone rubber still contains certain unreacted groups, so that certain crosslinking can be generated with the adhesive;
3. the adhesive has good waterproof performance, and the cable has excellent antifouling flashover resistance after being coated. Therefore, other waterproof treatment is not needed, the use is convenient, the process is simple, and the installation efficiency of the cable is improved.
Drawings
FIG. 1 is a flow chart of the preparation process of A.
FIG. 2 is a flow chart of the preparation process of B.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
All the raw materials used in the application are commercially available chemical raw materials.
Firstly, an adhesive for crosslinking polyethylene and silicon rubber:
comprising A and B, wherein
The A comprises the following components in parts by weight: 100 parts of a base polymer, 10-25 parts of a base crosslinking agent, 10-30 parts of an additional crosslinking agent and 5-15 parts of a filler;
the basic cross-linking agent is one or more of methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane and aminopropyltrimethoxysilane;
the additional cross-linking agent is one or more of isocyanatopropyl triethoxysilane, vinyl triisopropenoxysilane, methyl triisopropenoxysilane, phenyl triisopropenoxysilane, tetramethyl guanidinopropyltrimethoxysilane, gamma- (2, 3-epoxypropoxy) propyl trimethoxysilane, gamma-mono (2, 3-epoxypropoxy) propyl triethoxysilane, gamma-methacryloxypropyl trimethoxysilane, aniline methyltrimethoxysilane, aniline methyltriethoxysilane, aminoethyl aminopropylmethyldimethoxysilane, diethylaminomethyl triethoxysilane, gamma-methacryloxypropyl trimethoxysilane and gamma-methacryloxypropyl methyldimethoxysilane.
The B comprises the following components in parts by weight: 100 parts of base polymer, 5-15 parts of filler and 0.2-0.5 part of catalyst;
the catalyst is organic tin chelate or organic titanium or guanidino catalyst or silane catalyst.
The base polymer in A and B is hydroxy silicone oil.
The filler in A and B is fumed silica, specifically hydrophobic fumed silica.
Secondly, preparing an adhesive for crosslinking polyethylene and silicon rubber:
the first preparation method comprises the following steps:
a preparation method of an adhesive of polyethylene and silicone rubber comprises the following steps:
preparation of A:
SA-1, weighing the components in the A in proportion;
SA-2, adding the basic polymer and the basic cross-linking agent in the step A into a planetary stirrer, and mixing for 15min at low pressure;
SA-3, adding an additional cross-linking agent and introducing nitrogen to continue stirring for 30 min;
SA-4, adding a filler, introducing nitrogen, and stirring for 30 min;
SA-5, vacuumizing, sealing and storing;
b, preparation:
SB-1, weighing the components in the B in proportion;
SB-2, adding the basic polymer in the B into a planetary stirrer, and stirring for 15min at low pressure;
SB-3, adding the filler and stirring for 30 min;
SB-4, adding the catalyst and mixing for 30 min;
and SB-5, vacuumizing, sealing and storing.
The pressure of the low-pressure stirring in the SA-2 and the SB-2 is 0.1 Pa.
While vacuumizing SA-3, SA-4, SB-3 and SB-4, excess inert gas such as nitrogen, argon and the like is introduced.
The second preparation method comprises the following steps:
based on the first preparation method, after A, B is completely prepared, B is added into A to form a premixed adhesive, and the premixed adhesive is sealed and stored.
Thirdly, a use method of the adhesive of polyethylene and silicon rubber:
the first use method comprises the following steps:
a method for using an adhesive of polyethylene and silicone rubber comprises the following steps:
SC-1, uniformly mixing A and B at normal temperature to form an adhesive;
SC-2, uniformly coating an adhesive on the surface of the polyethylene material and the surface of the silicon rubber material within 15 minutes, and then pressing one side of the polyethylene material coated with the adhesive and one side of the silicon rubber material coated with the adhesive;
and SC-3, waiting for curing at normal temperature.
The first method of use corresponds to the first method of preparation.
The second use method comprises the following steps:
SD-1, after the premixed adhesive is started, uniformly coating the adhesive on the surface of the crosslinked polyethylene material and the surface of the silicone rubber material within 15 minutes, and then pressing one surface of the crosslinked polyethylene material coated with the adhesive and one surface of the silicone rubber material coated with the adhesive;
SD-2, waiting for curing at normal temperature.
The second method of use corresponds to the second method of preparation.
Fourth, examples and comparative examples:
example 1:
an adhesive for crosslinking polyethylene and silicon rubber comprises A and B, wherein,
the A comprises the following components in parts by weight:
100 parts of hydroxyl silicone oil, 10 parts of a base crosslinking agent, 10 parts of an additional crosslinking agent and 5 parts of hydrophobic fumed silica;
the basic cross-linking agent consists of 2 parts of methyltrimethoxysilane, 2 parts of methyltriethoxysilane, 2 parts of vinyltrimethoxysilane, 2 parts of vinyltriethoxysilane and 2 parts of phenyltrimethoxysilane; the additional crosslinking agent consists of 2 parts of isocyanatopropyltriethoxysilane, 2 parts of vinyltriisopropenoxysilane, 2 parts of methyltriisopropenoxysilane, 2 parts of phenyltriisopropenoxysilane and 2 parts of tetramethylguanidinopropyltrimethoxysilane;
the B comprises the following components in parts by weight:
100 parts of hydroxyl silicone oil, 5 parts of hydrophobic fumed silica and 0.2 part of catalyst;
the catalyst is organic tin chelate.
The adhesive is prepared according to the preparation method.
Example 2:
an adhesive for crosslinking polyethylene and silicon rubber comprises A and B, wherein,
the A comprises the following components in parts by weight:
100 parts of hydroxyl silicone oil, 20 parts of a base crosslinking agent, 20 parts of an additional crosslinking agent and 10 parts of hydrophobic fumed silica;
the basic cross-linking agent consists of 4 parts of methyltrimethoxysilane, 4 parts of methyltriethoxysilane, 4 parts of vinyltrimethoxysilane, 4 parts of vinyltriethoxysilane and 4 parts of phenyltrimethoxysilane; the additional crosslinking agent consists of 4 parts of isocyanatopropyltriethoxysilane, 4 parts of vinyltriisopropenoxysilane, 4 parts of methyltriisopropenoxysilane, 4 parts of phenyltriisopropenoxysilane and 4 parts of tetramethylguanidinopropyltrimethoxysilane;
the B comprises the following components in parts by weight:
100 parts of hydroxyl silicone oil, 10 parts of hydrophobic fumed silica and 0.3 part of catalyst;
the catalyst is organic tin chelate.
The adhesive is prepared according to the preparation method.
Example 3:
an adhesive for crosslinking polyethylene and silicon rubber comprises A and B, wherein,
the A comprises the following components in parts by weight:
100 parts of hydroxyl silicone oil, 25 parts of a base crosslinking agent, 30 parts of an additional crosslinking agent and 15 parts of hydrophobic fumed silica;
the basic cross-linking agent consists of 5 parts of methyltrimethoxysilane, 5 parts of methyltriethoxysilane, 5 parts of vinyltrimethoxysilane, 5 parts of vinyltriethoxysilane and 5 parts of phenyltrimethoxysilane; the additional crosslinking agent consists of 6 parts of isocyanatopropyltriethoxysilane, 6 parts of vinyltriisopropenoxysilane, 6 parts of methyltriisopropenoxysilane, 6 parts of phenyltriisopropenoxysilane and 6 parts of tetramethylguanidinopropyltrimethoxysilane;
the B comprises the following components in parts by weight:
100 parts of hydroxyl silicone oil, 15 parts of hydrophobic fumed silica and 0.5 part of catalyst;
the catalyst is organic tin chelate.
The adhesive is prepared according to the preparation method.
Example 4:
this embodiment is different from embodiment 2 only in that,
the base crosslinker consists of 4 parts of vinyltrimethoxysilane, 4 parts of vinyltriethoxysilane, 4 parts of phenyltrimethoxysilane, 4 parts of phenyltriethoxysilane, 4 parts of aminopropyltrimethoxysilane.
Example 5:
this embodiment is different from embodiment 2 only in that,
the base crosslinker consists of 10 parts methyltrimethoxysilane and 10 parts aminopropyltrimethoxysilane.
Example 6:
this embodiment is different from embodiment 2 only in that,
the additional crosslinking agent consists of 4 parts of gamma- (2, 3-glycidoxy) propyltrimethoxysilane, 4 parts of gamma- (2, 3-glycidoxy) propyltriethoxysilane, 4 parts of gamma-methacryloxypropyltrimethoxysilane, 4 parts of anilinomethyltrimethoxysilane and 4 parts of anilinomethyltriethoxysilane.
Example 7:
this embodiment is different from embodiment 2 only in that,
the additional crosslinker consists of 4 parts of aniline methyl triethoxysilane, 4 parts of aminoethyl aminopropyl methyl dimethoxysilane, 4 parts of diethylamino methyl triethoxysilane, 4 parts of gamma-methacryloxypropyl trimethoxysilane and 4 parts of gamma-methacryloxypropyl methyl dimethoxysilane.
Example 8:
this embodiment is different from embodiment 2 only in that,
the additional crosslinking agent is composed of 5 parts of isocyanatopropyltriethoxysilane, 5 parts of vinyltriisopropenoxysilane, 5 parts of methyltriisopropenoxysilane, and 5 parts of phenyltriisopropenoxysilane.
Example 9:
this embodiment is different from embodiment 2 only in that,
the catalyst is a guanidino catalyst.
Example 10:
this embodiment is different from embodiment 2 only in that,
the catalyst is a silane catalyst.
Comparative example 1:
this comparative example differs from example 2 only in that a does not contain a base crosslinker.
Comparative example 2:
this comparative example differs from example 2 only in that a does not contain an additional crosslinker.
Comparative example 3:
this comparative example differs from example 2 only in that a comprises 50 parts of the base crosslinker;
the base crosslinker consists of 10 parts methyltrimethoxysilane, 10 parts methyltriethoxysilane, 10 parts vinyltrimethoxysilane, 10 parts vinyltriethoxysilane, 10 parts phenyltrimethoxysilane.
Comparative example 4:
this comparative example differs from example 2 only in that a includes 50 parts of additional crosslinker;
the additional crosslinking agent was composed of 10 parts of isocyanatopropyltriethoxysilane, 10 parts of vinyltriisopropenoxysilane, 10 parts of methyltriisopropenoxysilane, 10 parts of phenyltriisopropenoxysilane, and 10 parts of tetramethylguanidinopropyltrimethoxysilane.
Comparative example 5:
this comparative example differs from example 2 only in that the catalyst in B is 10 parts.
Wherein examples 1-5 and comparative examples 1-3 both employ a first method of preparation and a first method of use; examples 6-10 and comparative examples 4-5 were both prepared using the second preparation method and the second method of use.
Comparative example 6:
kafft 704 glue was purchased from Higashi, New materials technology, Inc., Guangdong.
Comparative example 7:
kafft 703 glue was purchased from Higashi, New materials technology, Inc., Guangdong.
Comparative example 8:
3140 glue from Dow Corning.
Fifthly, performance detection:
1. detection items and test bases:
1-1: and (3) dielectric constant detection: reference is made to GB/T1409-2006 recommendation method for measuring permittivity and dielectric loss factor of an electrical insulating material under power frequency, audio frequency and high frequency (including meter wave wavelength);
1-2: and (3) detecting the insulating strength: reference is made to GB/T1408 insulating material electrical apparatus strength test method;
1-3: and (3) detecting the elongation: refer to HG/T3849 and 2008 determination of tensile strength and elongation at break of hard rubber;
1-4: and (3) detecting the shear strength: reference is made to GB/T7124-;
1-5: and (3) detecting the peeling strength: refer to GB/T2791-1995 adhesive T peel Strength test method for Flexible materials vs. Flexible materials.
As can be seen from the above tables, the adhesive prepared by the preparation method of the present application from crosslinked polyethylene and silicone rubber has good mechanical properties, especially glass strength, compared with those commonly used by those skilled in the art in the prior art, has outstanding performance advantages compared with the same type of product, and simultaneously ensures excellent insulating properties.
The above-mentioned embodiments are merely illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but only protected by the patent laws within the scope of the claims.
Claims (5)
1. An adhesive for crosslinking polyethylene and silicone rubber, which comprises A and B, and is characterized in that: the A comprises the following components in parts by weight: 100 parts of a base polymer, 10-25 parts of a base crosslinking agent, 10-30 parts of an additional crosslinking agent and 5-15 parts of a filler;
the B comprises the following components in parts by weight: 100 parts of base polymer, 5-15 parts of filler and 0.2-0.5 part of catalyst;
wherein, the basic polymer in A and B is hydroxyl silicone oil;
the base crosslinking agent in A is:
consists of 2 parts of methyltrimethoxysilane, 2 parts of methyltriethoxysilane, 2 parts of vinyltrimethoxysilane, 2 parts of vinyltriethoxysilane and 2 parts of phenyltrimethoxysilane;
the additional crosslinking agents in a are: consists of 2 parts of isocyanatopropyltriethoxysilane, 2 parts of vinyltriisopropenoxysilane, 2 parts of methyltriisopropenoxysilane, 2 parts of phenyltriisopropenoxysilane and 2 parts of tetramethylguanidinopropyltrimethoxysilane;
or
The base crosslinking agent in A is:
consists of 4 parts of methyltrimethoxysilane, 4 parts of methyltriethoxysilane, 4 parts of vinyltrimethoxysilane, 4 parts of vinyltriethoxysilane and 4 parts of phenyltrimethoxysilane;
the additional crosslinking agents in a are:
the adhesive consists of 4 parts of isocyanatopropyltriethoxysilane, 4 parts of vinyltriisopropenoxysilane, 4 parts of methyltriisopropenoxysilane, 4 parts of phenyltriisopropenoxysilane and 4 parts of tetramethylguanidinopropyltrimethoxysilane;
or
The base crosslinking agent in A is:
the paint consists of 5 parts of methyltrimethoxysilane, 5 parts of methyltriethoxysilane, 5 parts of vinyltrimethoxysilane, 5 parts of vinyltriethoxysilane and 5 parts of phenyltrimethoxysilane;
the additional crosslinking agents in a are:
consists of 6 parts of isocyanatopropyltriethoxysilane, 6 parts of vinyltriisopropenoxysilane, 6 parts of methyltriisopropenoxysilane, 6 parts of phenyltriisopropenoxysilane and 6 parts of tetramethylguanidinopropyltrimethoxysilane;
or
The base crosslinking agent in A is:
consists of 4 parts of methyltrimethoxysilane, 4 parts of methyltriethoxysilane, 4 parts of vinyltrimethoxysilane, 4 parts of vinyltriethoxysilane and 4 parts of phenyltrimethoxysilane;
the additional crosslinking agents in a are:
consists of 4 parts of gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane, 4 parts of gamma- (2, 3-epoxypropoxy) propyl triethoxy silane, 4 parts of gamma-methacryloxypropyl trimethoxy silane, 4 parts of aniline methyl trimethoxy silane and 4 parts of aniline methyl triethoxy silane;
or
The base crosslinking agent in A is:
consists of 4 parts of methyltrimethoxysilane, 4 parts of methyltriethoxysilane, 4 parts of vinyltrimethoxysilane, 4 parts of vinyltriethoxysilane and 4 parts of phenyltrimethoxysilane;
the base crosslinking agent in A is:
the coating consists of 4 parts of aniline methyl triethoxysilane, 4 parts of aminoethyl aminopropyl methyl dimethoxysilane, 4 parts of diethylamino methyl triethoxysilane, 4 parts of gamma-methacryloxypropyl trimethoxysilane and 4 parts of gamma-methacryloxypropyl methyl dimethoxysilane;
or
The base crosslinking agent in A is:
consists of 4 parts of methyltrimethoxysilane, 4 parts of methyltriethoxysilane, 4 parts of vinyltrimethoxysilane, 4 parts of vinyltriethoxysilane and 4 parts of phenyltrimethoxysilane;
the base crosslinking agent in A is:
the adhesive consists of 5 parts of isocyanatopropyltriethoxysilane, 5 parts of vinyl triisopropenoxysilane, 5 parts of methyl triisopropenoxysilane and 5 parts of phenyl triisopropenoxysilane;
the catalyst in B is organic tin chelate or organic titanium or guanidino catalyst.
2. The adhesive of crosslinked polyethylene and silicone rubber according to claim 1, characterized in that: the filler in A and B is fumed silica.
3. The adhesive of crosslinked polyethylene and silicone rubber according to claim 2, characterized in that: the fumed silica is specifically hydrophobic fumed silica.
4. The method for preparing the adhesive for crosslinking polyethylene and silicone rubber according to any one of claims 1 to 3, characterized in that: the method comprises the following steps:
preparation of A:
SA-1, weighing the components in the A in proportion;
SA-2, adding the basic polymer and the basic cross-linking agent in the A, and mixing at low pressure;
SA-3, adding additional cross-linking agent and continuing stirring;
SA-4, adding a filler and stirring;
a-5, vacuumizing, sealing and storing;
b, preparation:
SB-1, weighing the components in the B in proportion;
SB-2, adding the basic polymer in B, stirring under low pressure;
SB-3, adding a filler and stirring;
SB-4, adding a catalyst and mixing;
and SB-5, vacuumizing, sealing and storing.
5. The use method of the adhesive of crosslinked polyethylene and silicone rubber according to any one of claims 1 to 3, characterized in that: the method comprises the following steps:
SC-1, uniformly mixing A and B at normal temperature to form an adhesive;
SC-2, uniformly coating an adhesive on the surface of the crosslinked polyethylene material and the surface of the silicone rubber material within 15 minutes, and then pressing one side of the crosslinked polyethylene material coated with the adhesive and one side of the silicone rubber material coated with the adhesive;
and SC-3, waiting for curing at normal temperature.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103361023A (en) * | 2013-08-02 | 2013-10-23 | 东莞兆舜有机硅新材料科技有限公司 | Transparent dealcoholized single-component RTV silicone rubber sealant and preparation method thereof |
| CN106147695A (en) * | 2016-06-29 | 2016-11-23 | 佛山市幸多新材料有限公司 | Quick cured silicone glue of one 1 to 1 double-component and preparation method thereof |
| CN106753198A (en) * | 2016-11-14 | 2017-05-31 | 上海拜高高分子材料有限公司 | A kind of transparent single-component organic silicon composition of low viscosity |
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| JPH02272079A (en) * | 1989-08-11 | 1990-11-06 | Toyoda Gosei Co Ltd | Adhesive composition |
| JP2610777B2 (en) * | 1993-11-09 | 1997-05-14 | 東芝シリコーン株式会社 | Room temperature curable polyorganosiloxane composition |
| CN107109064A (en) * | 2015-01-21 | 2017-08-29 | 信越化学工业株式会社 | Normal temperature cured organic polysiloxane composition |
| CN109971416B (en) * | 2019-04-24 | 2021-09-14 | 耐奇化工(广东省)有限公司 | Modified bi-component silicone sealant and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103361023A (en) * | 2013-08-02 | 2013-10-23 | 东莞兆舜有机硅新材料科技有限公司 | Transparent dealcoholized single-component RTV silicone rubber sealant and preparation method thereof |
| CN106147695A (en) * | 2016-06-29 | 2016-11-23 | 佛山市幸多新材料有限公司 | Quick cured silicone glue of one 1 to 1 double-component and preparation method thereof |
| CN106753198A (en) * | 2016-11-14 | 2017-05-31 | 上海拜高高分子材料有限公司 | A kind of transparent single-component organic silicon composition of low viscosity |
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Denomination of invention: Adhesive for cross-linked polyethylene and silicone rubber, preparation method and usage method Effective date of registration: 20230718 Granted publication date: 20220308 Pledgee: Zhejiang Lin'an Rural Commercial Bank Co.,Ltd. Pledgor: HANGZHOU XINENG NEW MATERIAL CO.,LTD. Registration number: Y2023330001514 |