Organic silicon prepolymer, organic silicon modified epoxy resin, adhesive, colloid and preparation method thereof
阅读说明：本技术 有机硅预聚体、有机硅改性环氧树脂、胶粘剂、胶体及其制备方法 (Organic silicon prepolymer, organic silicon modified epoxy resin, adhesive, colloid and preparation method thereof ) 是由 娄星原 冯朝波 黎灿光 侯甫文 陈建军 刘光华 于 2020-12-30 设计创作，主要内容包括：本发明涉及有机硅预聚体、有机硅改性环氧树脂、胶粘剂、胶体及其制备方法,其中,有机硅改性环氧树脂主要由以下重量份的反应原料制备而成：环氧树脂35-55份、硅氧烷5-20份、硅油5-20份、催化剂0.1-3份及水0-10份。该有机硅改性环氧树脂具有较高的耐温性能,在高温条件下仍然具有较优的机械性能,能够满足发热量较大的器件的粘接需求。(The invention relates to an organic silicon prepolymer, an organic silicon modified epoxy resin, an adhesive, a colloid and a preparation method thereof, wherein the organic silicon modified epoxy resin is mainly prepared from the following reaction raw materials in parts by weight: 35-55 parts of epoxy resin, 5-20 parts of siloxane, 5-20 parts of silicone oil, 0.1-3 parts of catalyst and 0-10 parts of water. The organic silicon modified epoxy resin has high temperature resistance, still has excellent mechanical property under the high-temperature condition, and can meet the bonding requirement of devices with large heat productivity.)
1. An organic silicon prepolymer is characterized by being mainly prepared by polymerizing siloxane and silicone oil according to the mass ratio of 1 (0.3-5).
2. The silicone prepolymer of claim 1, wherein the silicone prepolymer has a structure represented by formula (I):
a and b are each independently any integer from 1 to 20;
R1is an acceptable group in optional siloxane;
R3is an acceptable group in optional silicone oil.
3. The organic silicon modified epoxy resin is characterized by being mainly prepared from the following reaction raw materials in parts by weight: 35-55 parts of epoxy resin, 5-20 parts of siloxane, 5-20 parts of silicone oil, 0.1-3 parts of catalyst and 1-10 parts of water.
4. The silicone-modified epoxy resin of claim 3, wherein the siloxane is selected from the group consisting of: one or more of epoxytrimethoxysilane and epoxytriethoxysilane; and/or
The silicone oil is selected from: one or more of dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, polydimethylsiloxane, and polydiethylsiloxane; and/or
The epoxy resin is: one or more of glycidyl ether epoxy resin and glycidyl ester epoxy resin; and/or
The catalyst is hydrochloric acid with the mass percentage of 30-40%.
5. The silicone-modified epoxy resin of claim 3, wherein the epoxy resin has a structure represented by formula A:
x is O or-COO;
n is an integer of 1 to 20; and/or
The siloxane has a structure represented by formula B:
R1is an optionally acceptable group in a siloxane; and/or
The silicone oil has a structure shown in formula C:
R2and R3Each independently is an optionally acceptable group in a silicone oil.
6. The silicone-modified epoxy resin according to claim 3, wherein the silicone-modified epoxy resin has a structure represented by formula (II):
n is any integer of 1-20; a and b are each independently any integer from 1 to 20;
x is O or-COO;
R1is an optionally acceptable group in a siloxane;
R3is an optionally acceptable group in silicone oil.
7. An organosilicon modified epoxy adhesive, comprising:
the component A is prepared by the reaction of the organic silicon prepolymer of claim 1 or 2 and epoxy resin, or is the organic silicon modified epoxy resin of any one of claims 3 to 6;
the component B comprises: 1, 3-cyclohexyldimethylamine and an accelerator.
8. A colloid prepared from the silicone-modified epoxy adhesive of claim 7.
9. The preparation method of the colloid is characterized by comprising the following steps:
providing the silicone-modified epoxy adhesive of claim 7;
mixing the component A and the component B in the organic silicon modified epoxy resin to prepare a mixture;
and coating the mixture on a part to be pasted, and curing to obtain the colloid.
10. The method of making according to claim 9, wherein the step of providing the silicone-modified epoxy adhesive of claim 7 comprises the steps of:
mixing siloxane, silicone oil, a catalyst and water, and reacting at 110-130 ℃ to obtain an organic silicon prepolymer;
mixing the organic silicon prepolymer and epoxy resin, and reacting at the temperature of 110-130 ℃ to obtain a component A of organic silicon modified epoxy resin;
providing 1, 3-cyclohexyldimethylamine and an accelerator to obtain a component B of the organosilicon modified epoxy resin.
Technical Field
The invention relates to the technical field of materials, in particular to an organic silicon prepolymer, an organic silicon modified epoxy resin, an adhesive, a colloid and a preparation method thereof.
Background
The epoxy adhesive is a curing system prepared from epoxy resin (used as a matrix) and a curing agent according to a certain proportion. The molecular structure of the epoxy resin is characterized in that a molecular chain contains active epoxy groups, and the epoxy groups can be positioned at the tail ends, in the middle or in a ring structure. Because the molecular structure contains active epoxy groups, the epoxy groups can generate cross-linking reaction with various curing agents to form insoluble high polymers with a three-dimensional network structure. The cured epoxy resin (namely the epoxy adhesive) has good physical and chemical properties, has the advantages of excellent bonding strength to the surfaces of metal and nonmetal materials, high mechanical strength, good dielectric property and the like, and is widely applied to bonding of devices and components.
However, although the conventional epoxy adhesive has excellent bonding strength at low temperature, the bonding strength at high temperature is remarkably reduced, and the bonding requirement of a heating device cannot be met. Particularly in the technical fields of electronic devices, power batteries and the like, along with the prolonging of service time, the heat productivity of the devices is larger, and the related performance of the adhesive is influenced to a certain extent, so that the epoxy adhesive is required to have higher temperature resistance so as to reduce the repair and rejection rate of products, and the epoxy adhesive is also required to have higher impact toughness so as to reduce the brittle fracture condition of products. Based on this, an epoxy adhesive still having excellent mechanical properties under high temperature conditions is urgently needed to be researched to meet the bonding requirements of devices with large heat productivity.
Disclosure of Invention
Based on the above, it is necessary to provide an organosilicon prepolymer, an organosilicon modified epoxy resin, an adhesive, a colloid and a preparation method thereof. The organic silicon modified epoxy resin has high temperature resistance, namely still has excellent mechanical property under the high-temperature condition, and can meet the bonding requirement of devices with large heat productivity.
An organic silicon prepolymer is mainly prepared by polymerizing siloxane and silicone oil according to a mass ratio of 1 (0.3-5).
In one embodiment, the silicone prepolymer has a structure represented by formula (I):
a and b are each independently any integer from 1 to 20;
R1is an acceptable group in optional siloxane;
R3is an acceptable group in optional silicone oil.
An organic silicon modified epoxy resin is mainly prepared from the following reaction raw materials in parts by weight: 35-55 parts of epoxy resin, 5-20 parts of siloxane, 5-20 parts of silicone oil, 0.1-3 parts of catalyst and 1-10 parts of water.
In one embodiment, the siloxane is selected from: one or more of epoxytrimethoxysilane and epoxytriethoxysilane; and/or
The silicone oil is selected from: one or more of dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, polydimethylsiloxane, and polydiethylsiloxane; and/or
The epoxy resin is: one or more of glycidyl ether epoxy resin and glycidyl ester epoxy resin; and/or
The catalyst is hydrochloric acid with the mass percentage of 30-40%.
In one embodiment, the epoxy resin has a structure represented by formula a:
x is O or-COO;
n is an integer of 1 to 20; and/or
The siloxane has a structure represented by formula B:
R1is an optionally acceptable group in a siloxane; and/or
The silicone oil has a structure shown in formula C:
R2and R3Each independently is an optionally acceptable group in a silicone oil.
In one embodiment, the silicone-modified epoxy resin has a structure represented by formula (II):
n is any integer of 1-20; a and b are each independently any integer from 1 to 20;
x is O or-COO;
R1is an optionally acceptable group in a siloxane;
R3is an optionally acceptable group in silicone oil.
A silicone-modified epoxy adhesive comprising:
the component A is prepared by the reaction of the organic silicon prepolymer and epoxy resin or the organic silicon modified epoxy resin;
the component B comprises: 1, 3-cyclohexyldimethylamine and an accelerator.
The colloid is prepared from the organic silicon modified epoxy adhesive.
A method for preparing a colloid, comprising the steps of:
providing the organic silicon modified epoxy adhesive;
mixing the component A and the component B in the organic silicon modified epoxy resin to prepare a mixture;
and coating the mixture on a part to be pasted, and curing to obtain the colloid.
In one embodiment, the step of providing the silicone-modified epoxy adhesive comprises the following steps:
mixing siloxane, silicone oil, a catalyst and water, and reacting at 110-130 ℃ to obtain an organic silicon prepolymer;
mixing the organic silicon prepolymer and epoxy resin, and reacting at the temperature of 110-130 ℃ to obtain a component A of organic silicon modified epoxy resin;
providing 1, 3-cyclohexyldimethylamine and an accelerator to obtain a component B of the organosilicon modified epoxy resin.
Advantageous effects
The invention utilizes the excellent characteristics of high impact toughness, high and low temperature resistance, oxidation resistance stability and weather resistance of the organic silicon prepolymer generated by siloxane and silicone oil, and the organic silicon prepolymer is modified with epoxy resin for use so as to improve the mechanical property of the epoxy adhesive under the high-temperature condition. Meanwhile, the introduction of the organosilicon with epoxy functional groups can increase the crosslinking density of the epoxy resin, and also can meet the requirement that the finished product has considerable toughness so as to meet the bonding requirements of devices with larger heat productivity such as high-temperature or high-low temperature recycling use and the like, and the weather resistance is further improved.
Detailed Description
In order that the invention may be more fully understood, a more particular description of the invention will now be rendered by reference to specific embodiments thereof that are illustrated in the appended drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The weight of the related components mentioned in the description of the embodiments of the present invention may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present invention as long as it is in accordance with the description of the embodiments of the present invention. Specifically, the weight described in the description of the embodiment of the present invention may be a unit of mass known in the chemical industry field, such as μ g, mg, g, and kg.
Term(s) for
Unless otherwise stated or contradicted, terms or phrases used herein have the following meanings:
the term "alkyl" refers to a saturated hydrocarbon containing a primary (normal) carbon atom, or a secondary carbon atom, or a tertiary carbon atom, or a quaternary carbon atom, or a combination thereof. Phrases containing the term, e.g., "C1～C18The alkyl group means an alkyl group having 1 to 18 carbon atoms. Suitable examples include, but are not limited to: methyl (Me, -CH)3) Ethyl (Et-CH)2CH3) 1-propyl (n-Pr, n-propyl, -CH)2CH2CH3) 2-propyl (i-Pr, i-propyl, -CH (CH)3)2) 1-butyl (n-Bu, n-butyl, -CH)2CH2CH2CH3) 2-methyl-1-propyl (i-Bu, i-butyl, -CH)2CH(CH3)2) 2-butyl (s-Bu, s-butyl, -CH (CH)3)CH2CH3) 2-methyl-2-propyl (t-Bu, t-butyl, -C (CH)3)3) 1-pentyl (n-pentyl, -CH)2CH2CH2CH2CH3) 2-pentyl (-CH (CH3) CH2CH2CH3), 3-pentyl (-CH (CH)2CH3)2) 2-methyl-2-butyl (-C (CH)3)2CH2CH3) 3-methyl-2-butyl (-CH (CH)3)CH(CH3)2) 3-methyl-1-butyl (-CH)2CH2CH(CH3)2) 2-methyl-1-butyl (-CH)2CH(CH3)CH2CH3) 1-hexyl (-CH)2CH2CH2CH2CH2CH3) 2-hexyl (-CH (CH)3)CH2CH2CH2CH3) 3-hexyl (-CH (CH)2CH3)(CH2CH2CH3) 2-methyl-2-pentyl (-C (CH))3)2CH2CH2CH3) 3-methyl-2-pentyl (-CH (CH)3)CH(CH3)CH2CH3) 4-methyl-2-pentyl (-CH (CH)3)CH2CH(CH3)2) 3-methyl-3-pentyl (-C (CH)3)(CH2CH3)2) 2-methyl-3-pentyl (-CH (CH)2CH3)CH(CH3)2) 2, 3-dimethyl-2-butyl (-C (CH)3)2CH(CH3)2) 3, 3-dimethyl-2-butyl (-CH (CH)3)C(CH3)3And octyl (- (CH)2)7CH3)。
Detailed explanation
The invention provides an organic silicon prepolymer, which is mainly prepared by polymerizing siloxane and silicone oil.
In one embodiment, the organic silicon prepolymer is mainly prepared by polymerizing siloxane and silicone oil according to the mass ratio of 1 (0.3-5); further, the mass ratio of the siloxane to the silicone oil is 1 (0.3-3); further, the mass ratio of the siloxane to the silicone oil is 1 (1-3); further, the mass ratio of the siloxane to the silicone oil is 1:1, 1:2, 1:3, 3:1, or 2: 1.
In one embodiment, the silicone prepolymer has a structure represented by formula (I):
a and b are each independently any integer from 1 to 20;
R1is an acceptable group in optional siloxane;
R3is an acceptable group in optional silicone oil.
In one embodiment, the number average molecular weight of the silicone prepolymer is 600-2000.
In one embodiment, R1Selected from: c1-18An alkyl group; further, R1Selected from: c1-6An alkyl group; further, R1Selected from: methyl, ethyl, propyl, isopropyl, n-butyl, or tert-butyl.
In one embodiment, R3Selected from: c1-18An alkyl group; further, R3Selected from: c1-6An alkyl group; further, R3Selected from: methyl, ethyl, propyl, isopropyl, n-butyl, or tert-butyl.
The organic silicon prepolymer has excellent characteristics of high impact toughness, high and low temperature resistance, oxidation resistance stability and weather resistance, can be used for modifying epoxy resin, can effectively improve the mechanical property of the epoxy resin at high temperature, and simultaneously has the introduction of organic silicon with epoxy functional groups, so that the crosslinking density of the epoxy resin can be increased, the toughness of a finished product is also met, the bonding requirements of devices with higher heat productivity such as high-temperature or high-low temperature recycling use and the like are met, and the weather resistance is further improved.
In addition, the organic silicon modified epoxy resin formed by the organic silicon prepolymer has higher compatibility to organic silicon and inorganic silicon, the problem that the traditional epoxy resin formula is difficult to be compatible with an organic silicon component and an inorganic silicon component at the same time is solved, the formula selection range of related products of the epoxy resin is effectively expanded, and the organic silicon modified epoxy resin has a larger application prospect.
The invention also provides an organic silicon modified epoxy resin which is mainly prepared from the following reaction raw materials: 35-55 parts of epoxy resin, 5-20 parts of siloxane, 5-20 parts of silicone oil, 0.1-3 parts of catalyst and 1-10 parts of water.
In one embodiment, the silicone modified epoxy resin comprises 40-50 parts of epoxy resin, 5-15 parts of siloxane, 5-15 parts of silicone oil, 0.1-3 parts of catalyst and 1-8 parts of water.
In one embodiment, the mass ratio of the siloxane to the silicone oil is 1 (0.3-5); further, the mass ratio of the siloxane to the silicone oil is 1 (0.3-3); further, the mass ratio of the siloxane to the silicone oil is 1 (1-3), and further the mass ratio of the siloxane to the silicone oil is 1:1, 1:2, 1:3, 3:1 or 2: 1.
In one embodiment, the number average molecular weight of the silicone modified epoxy resin is 1000-.
In one embodiment, the catalyst is an inorganic acid; further, the catalyst is hydrochloric acid; further, the catalyst is hydrochloric acid with the mass percentage of 30-40%.
In one embodiment, the water is deionized water.
In one embodiment, the epoxy resin is: one or more of glycidyl ether epoxy resin and glycidyl ester epoxy resin.
In one embodiment, the epoxy resin has a structure represented by formula a:
x is O or-COO;
n is an integer of 1 to 20.
In one embodiment, X is O, i.e., the structural epoxy resin of formula a is:
in one embodiment, X is COO, i.e., the structural epoxy resin of formula a is:
in one embodiment, the siloxane is selected from: one or more of epoxytrimethoxysilane and epoxytriethoxysilane.
In one embodiment, the siloxane has a structure represented by formula B:
R1is an optionally acceptable group in siloxane.
Understandably, in the structure shown in formula B, R1May be an optional acceptable group in the siloxane without departing from the object of the present invention. Specifically, R1The definitions of (A) and (B) are as described above, and are not described herein again.
In one embodiment, the silicone oil is selected from: one or more of dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane, polydimethylsiloxane, and polydiethylsiloxane.
In one embodiment, the silicone oil has a structure represented by formula C:
R2and R3Each independently is an optionally acceptable group in a silicone oil.
Understandably, in the structure shown in formula C, R2And R3May be an optionally acceptable group in the silicone oil, as long as it does not contradict the object of the present invention. Specifically, R3The definitions of (A) and (B) are as described above, and are not described herein again.
In one embodiment, R2Selected from: c1-18An alkyl group; further, R2Selected from: c1-6An alkyl group; further, R2Selected from: methyl, ethyl, propyl, isopropyl, n-butyl, or tert-butylA butyl group.
In one embodiment, the silicone-modified epoxy resin has a structure represented by formula (II)
n is any integer of 1-20; a and b are each independently any integer from 1 to 20;
x is O or-COO;
R1is an optionally acceptable group in a siloxane;
R3is an optionally acceptable group in silicone oil.
Wherein, each group is defined as above, and is not described in detail herein.
The organic silicon modified epoxy resin has excellent high-temperature resistance, namely still has excellent mechanical property and toughness under the high-temperature condition, and can meet the bonding requirement of devices with larger heat productivity. The organic silicon modified epoxy resin has high compatibility to organic silicon and inorganic silicon, solves the problem that the traditional epoxy resin formula is difficult to be compatible with an organic silicon component and an inorganic silicon component at the same time, effectively expands the formula selection range of related products of the epoxy resin, and has a wide application prospect.
An embodiment of the present invention provides an organosilicon modified epoxy adhesive, including:
the component A is prepared by the reaction of the organic silicon prepolymer and epoxy resin or the organic silicon modified epoxy resin;
the component B comprises: 1, 3-cyclohexyldimethylamine and an accelerator.
Wherein, each component in the component A is as described above, and is not described herein again.
In one embodiment, the component B comprises 5 to 15 parts by weight of 1, 3-cyclohexyldimethylamine and 0.5 to 1.5 parts by weight of accelerator; further, 8-12 parts of 1, 3-cyclohexyldimethylamine and 0.8-1.2 parts of accelerator.
The invention also provides a preparation method of the organic silicon modified epoxy adhesive, which comprises the following steps:
s101: preparing a component A of the organic silicon modified epoxy adhesive;
further, step S101 includes the steps of:
s1011: mixing siloxane, silicone oil, catalyst and water, and reacting (preferably reacting for 1-3h, more preferably reacting for 1.5-2.5h) at 110-130 deg.C (preferably 115-125 deg.C, more preferably 120 deg.C) to obtain the silicone prepolymer.
The siloxane, silicone oil and catalyst in step S1011 are as described above.
In one embodiment, step S1011 performs the following reaction:
the radicals of the above reaction formulae are as defined above.
S1012: mixing the organic silicon prepolymer and the epoxy resin, and reacting under the condition of 110-130 ℃ (preferably 115-125 ℃, and more preferably 120 ℃) to obtain the component A of the organic silicon modified epoxy resin.
In one embodiment, in step S1012, the silicone prepolymer, the epoxy resin and the catalyst are mixed, reacted at 110 ℃ to 130 ℃ for 1 to 3 hours (preferably 1.5 to 2.5 hours), and then stirred open and kept warm for a predetermined time to remove part or all of the solvent (preferably kept warm for 2 to 5 hours, more preferably 2.5 to 3.5 hours) to obtain component a of the silicone modified epoxy resin.
In one embodiment, step S1012 performs the following reaction:
s102: preparing the component B of the organic silicon modified epoxy adhesive.
In one embodiment, step S102 includes the steps of: 1, 3-cyclohexyldimethylamine and an accelerator are provided.
It is understood that, in step S102, the 1, 3-cyclohexyldimethylamine and the accelerator can be mixed to form a mixture, and then the mixture is mixed with the a component during the actual use of the adhesive, or the a component, the 1, 3-cyclohexyldimethylamine and the accelerator can be directly mixed during the actual use of the adhesive, and it is understood that the invention is in the protection scope.
The invention provides a colloid which is prepared from the organic silicon modified epoxy adhesive.
An embodiment of the present invention further provides a method for preparing a colloid, including the following steps:
s201: providing the organic silicon modified epoxy adhesive;
specifically, step S201 is as described in steps S101-S102, and will not be described herein again.
S202: mixing the component A and the component B in the organic silicon modified epoxy resin to prepare a mixture;
in one embodiment, the mass ratio of the component A to the component B in the mixture is (8-12): 1.
s203: and coating the mixture on a part to be pasted, and curing to obtain the colloid.
The colloid has excellent mechanical performance under the high-temperature condition, has higher crosslinking density and higher toughness, can be used in a high-temperature environment or a high-low temperature circulating environment, and can meet the bonding requirement of a device with larger modern heat productivity.
The present invention will be described below with reference to specific examples.
The epoxy resins used in the examples below were the conventional type E51 epoxy resin; the siloxane is epoxy trimethoxy silane; the silicone oil is dimethyl dimethoxy silane; the accelerant is DMP-30; the toughening agent is MX-154; the temperature-resistant auxiliary agent is ferric oxide auxiliary agent and MQ silicon resin; unspecified reagents are conventional commercially available reagents.
Example 1
Organic silicon modified epoxy adhesive
The component A comprises: the organosilicon modified epoxy resin comprises the following reaction raw materials: 40 parts of epoxy resin, 10 parts of siloxane, 10 parts of silicone oil, 1 part of 35% hydrochloric acid and 5 parts of deionized water;
and B component: 10 parts of 1, 3-cyclohexyldimethylamine and 1 part of accelerator.
The preparation method comprises the following steps:
(1) mixing siloxane, silicone oil, a catalyst and water, stirring uniformly, heating to 120 ℃, stirring, and carrying out reflux reaction for 2 hours to obtain a prepolymer a for later use;
(2) mixing epoxy resin with the prepolymer a obtained in the step (1), stirring, uniformly mixing, simultaneously heating to 120 ℃, stirring, performing reflux reaction for 2 hours, then stirring in an open manner, and preserving heat for 3 hours to obtain organosilicon modified epoxy resin serving as a component A;
(3) mixing the component A and the component B in a mass ratio of 10: 1, mixing and stirring uniformly to obtain a mixture.
(4) And (4) coating the mixture obtained in the step (3) on a substrate, and curing to obtain the colloid.
Example 2
Organic silicon modified epoxy adhesive
The component A comprises: the organosilicon modified epoxy resin comprises the following reaction raw materials: 40 parts of epoxy resin, 5 parts of siloxane, 15 parts of silicone oil, 1 part of 35% hydrochloric acid and 5 parts of deionized water;
and B component: 10 parts of 1, 3-cyclohexyldimethylamine and 1 part of accelerator.
The preparation method comprises the following steps:
(1) mixing siloxane, silicone oil, a catalyst and water, stirring uniformly, heating to 120 ℃, stirring, and carrying out reflux reaction for 2 hours to obtain a prepolymer a for later use;
(2) mixing epoxy resin with the prepolymer a obtained in the step (1), stirring, uniformly mixing, simultaneously heating to 120 ℃, stirring, performing reflux reaction for 2 hours, then stirring in an open manner, and preserving heat for 3 hours to obtain organosilicon modified epoxy resin serving as a component A;
(3) the component A and the component B are mixed according to the mass ratio of 10: 1, mixing and stirring uniformly to obtain a mixture.
(4) And (4) coating the mixture obtained in the step (3) on a substrate, and curing to obtain the colloid.
Example 3
Organic silicon modified epoxy adhesive
The component A comprises: the organosilicon modified epoxy resin comprises the following reaction raw materials: 40 parts of epoxy resin, 15 parts of siloxane, 5 parts of silicone oil, 1 part of 35% hydrochloric acid and 5 parts of deionized water;
and B component: 10 parts of 1, 3-cyclohexyldimethylamine and 1 part of accelerator.
The preparation method comprises the following steps:
(1) mixing siloxane, silicone oil, a catalyst and water, stirring uniformly, heating to 120 ℃, stirring, and carrying out reflux reaction for 2 hours to obtain a prepolymer a for later use;
(2) mixing epoxy resin with the prepolymer a obtained in the step (1), stirring, uniformly mixing, simultaneously heating to 120 ℃, stirring, performing reflux reaction for 2 hours, then stirring in an open manner, and preserving heat for 3 hours to obtain organosilicon modified epoxy resin serving as a component A;
(3) the component A and the component B are mixed according to the mass ratio of 10: 1, mixing and stirring uniformly to obtain a mixture.
(4) And (4) coating the mixture obtained in the step (3) on a substrate, and curing to obtain the colloid.
Comparative example 1
Organic silicon modified epoxy adhesive
The component A comprises: the organosilicon modified epoxy resin comprises the following reaction raw materials: 40 parts of epoxy resin, 0 part of siloxane, 20 parts of silicone oil, 1 part of 35% hydrochloric acid and 5 parts of deionized water;
and B component: 10 parts of 1, 3-cyclohexyldimethylamine and 1 part of accelerator.
The preparation method comprises the following steps:
(1) stirring and uniformly mixing silicone oil, epoxy resin, a catalyst and water, simultaneously heating to 120 ℃, stirring, performing reflux reaction for 2 hours, then stirring in an open manner, and preserving heat for 3 hours to obtain organosilicon modified epoxy resin serving as a component A;
(2) the component A and the component B are mixed according to the mass ratio of 10: 1, mixing and stirring uniformly to obtain a mixture.
(3) And (3) coating the mixture obtained in the step (2) on a substrate, and curing to obtain the colloid.
Comparative example 2
Organic silicon modified epoxy adhesive
The component A comprises: the organosilicon modified epoxy resin comprises the following reaction raw materials: 40 parts of epoxy resin, 20 parts of siloxane, 0 part of silicone oil, 1 part of 35% hydrochloric acid and 5 parts of deionized water;
and B component: 10 parts of 1, 3-cyclohexyldimethylamine and 1 part of accelerator.
The preparation method comprises the following steps:
(1) stirring and uniformly mixing siloxane, epoxy resin, a catalyst and water, simultaneously heating to 120 ℃, stirring, performing reflux reaction for 2 hours, then stirring in an open way, and preserving heat for 3 hours to obtain organosilicon modified epoxy resin as a component A;
(2) the component A and the component B are mixed according to the mass ratio of 10: 1, mixing and stirring uniformly to obtain a mixture.
(3) And (3) coating the mixture obtained in the step (2) on a substrate, and curing to obtain the colloid.
Comparative example 3
Organic silicon modified epoxy adhesive
The component A comprises: the organosilicon modified epoxy resin comprises the following reaction raw materials: 40 parts of epoxy resin, 10 parts of siloxane, 10 parts of silicone oil, 0 part of 35% hydrochloric acid and 5 parts of deionized water;
and B component: 10 parts of 1, 3-cyclohexyldimethylamine and 1 part of accelerator.
The preparation method comprises the following steps:
(1) mixing siloxane, silicone oil and water, stirring uniformly, heating to 120 ℃, stirring, and carrying out reflux reaction for 2 hours to obtain a prepolymer a for later use;
(2) mixing epoxy resin with the prepolymer a prepared in the step (1), stirring, uniformly mixing, simultaneously heating to 120 ℃, stirring, performing reflux reaction for 2 hours, then stirring in an open manner, and preserving heat for 3 hours to obtain organosilicon modified epoxy resin serving as a component A;
(3) the component A and the component B are mixed according to the mass ratio of 10: 1, mixing and stirring uniformly to obtain a mixture.
(4) And (4) coating the mixture obtained in the step (3) on a substrate, and curing to obtain the colloid.
Comparative example 4
Epoxy adhesive
The component A comprises: 64 parts of epoxy resin and 2 parts of toughening agent;
and B component: 10 parts of 1, 3-cyclohexyldimethylamine and 1 part of accelerator.
The preparation method comprises the following steps:
(1) mixing epoxy resin and a toughening agent to obtain a component A;
(2) mixing 1, 3-cyclohexyldimethylamine and an accelerator to obtain a component B;
(3) the component A and the component B are mixed according to the mass ratio of 10: 1, mixing and stirring uniformly to obtain a mixture.
(4) And (4) coating the mixture obtained in the step (3) on a substrate, and curing to obtain the colloid.
Comparative example 5
Epoxy adhesive
The component A comprises: 64 parts of epoxy resin and 2 parts of temperature-resistant auxiliary agent;
and B component: 10 parts of 1, 3-cyclohexyldimethylamine and 1 part of accelerator.
The preparation method comprises the following steps:
(1) mixing epoxy resin and a temperature-resistant additive to obtain a component A;
(2) mixing 1, 3-cyclohexyldimethylamine and an accelerator to obtain a component B;
(3) the component A and the component B are mixed according to the mass ratio of 10: 1, mixing and stirring uniformly to obtain a mixture.
(4) And (4) coating the mixture obtained in the step (3) on a substrate, and curing to obtain the colloid.
Performance testing
The colloids of examples 1 to 4 and comparative examples 1 to 5 were tested according to the following test methods, and the test results are shown in table 1:
impact strength KJ/m2：GB 1043；
Shear strength: GB 7124.
TABLE 1
As can be seen from table 1, examples 1 to 3 have superior mechanical properties at both low and high temperatures. The technical scheme of the invention has higher temperature resistance, namely, the mechanical property can still be kept better under the high-temperature condition, so that the bonding requirement of devices with larger heat productivity can be met.
Further, comparative example 1, example 2 and example 3 are different in the ratio of silicone to silicone oil, and as can be seen from table 1, the technical effects of example 1 and example 2 are superior to example 3, indicating that the mass ratio of silicone to silicone oil is preferably 1 (1-3).
Comparative example 1, comparative example 1 and comparative example 2 were compared, except that comparative example 1 lacked silicone and comparative example 2 lacked silicone oil. As can be seen from table 1, the technical effect of example 1 is significantly better than that of comparative examples 1 and 2, especially the mechanical properties at high temperature. The modification effect of the prepolymer generated by siloxane and silicone oil on the epoxy resin is better than that of the single organic silicon.
Comparative example 1 and comparative examples 3 and 4, and comparative examples 3 and 4 are formulations commonly used in the conventional art. As can be seen from table 1, the technical effect is not as good as in example 1 of the present invention. The technical scheme of the invention is explained again that compared with the prior art, the mechanical properties at high and low temperatures are greatly improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
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