阅读说明：本技术 一种热压快速固化且常温混合后可操作时间长的双组分丙烯酸酯结构胶及其制备方法 (Bi-component acrylate structural adhesive capable of being rapidly cured by hot pressing and long in operable time after being mixed at normal temperature and preparation method thereof ) 是由 魏相榕 林鸿腾 于 2021-01-29 设计创作，主要内容包括：一种热压快速固化且常温混合后可操作时间长的双组分丙烯酸酯结构胶及其制备方法,在其中加入金属催化剂,可以缩短其加热保压条件下的初步固化的时间,进一步加入马来酸或富马酸,利用其基团,延长其在常温时的反应时间,以保证高温可实现快速定位的同时,常温的情况下可操作时间延长,一般可实现15～40分钟,这样的设计,既保证了一旦施加高温保压的情况下该丙烯酸酯结构胶即可实现短时间的快速固化,又可保证在施加高温保压之前,常温状态下的可操作的时间较长,为较为复杂的工艺或产品的装配预留了足够时间；一旦装配结束后提供高温保压,又可在短时间内即达到较高的热压强度,既提高了生产效率又提升了良品率。(A hot-pressing fast solidification and can operate long bi-component acrylate structural adhesive and its preparation method after the normal temperature mixes, add metal catalyst among them, can shorten its initial solidification time under the condition of heating and pressure maintaining, further add maleic acid or fumaric acid, utilize its group, lengthen its reaction time at normal temperature, in order to guarantee the high temperature can realize the fast positioning at the same time, the operable time under the condition of normal temperature is lengthened, can generally realize 15-40 minutes, such design, have already guaranteed the acrylate structural adhesive can realize the fast solidification of the short time under the condition of applying the high temperature and pressure maintaining once, can guarantee to apply before the high temperature and pressure maintaining, the operable time under the normal temperature state is longer, has reserved the sufficient time for the assembly of more complicated craft or products; once the assembly is finished, high-temperature pressure maintaining is provided, and high hot-pressing strength can be achieved in a short time, so that the production efficiency is improved, and the yield is improved.)

1. The dual-component acrylate structural adhesive which is rapidly cured by hot pressing and can be operated for a long time after being mixed at normal temperature comprises a component A and a component B, and is characterized in that:

the component A comprises the following components in parts by weight:

the component B comprises the following components in parts by weight:

the A, B components have a volume ratio of 10: 1; and A, B components were stored separately.

2. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the acrylate monomer is one or the combination of more than one of methacrylic acid, methyl methacrylate, ethyl methacrylate, isobornyl methacrylate, acryloyl morpholine, trimethylcyclohexane acrylate and cyclohexane dimethanol diacrylate.

3. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the core-shell particles are one or the combination of more than one of ABS, MBS, SBS, butadiene rubber core-shell particles and styrene butadiene rubber core-shell particles.

4. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the liquid rubber is one or the combination of more than one of liquid butadiene rubber, liquid isoprene rubber and liquid styrene-butadiene rubber.

5. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the amine accelerator is one or a combination of more than one of ethylenediamine, propylenediamine, hexanediamine, diethylamine, triethylamine, dipropylamine, tripropylamine, N-dimethyl-p-phenylenediamine, N-diethyl-p-toluidine, N-dihydroxyethyl-p-toluidine and benzyl dimethylamine.

6. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the organic metal accelerant is one or the combination of more than one of cobalt naphthenate, cobalt acetate, manganese naphthenate and vanadium acetylacetonate.

7. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the phosphate is one or more of PM-2, PM1500, PM1520, PM3030, PM3060, CD9050 and CD 9051.

8. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the stabilizer is one or the combination of more than one of hydroquinone, p-benzoquinone, 1, 4-naphthoquinone and 2, 6-di-tert-butyl-4-methylphenol.

9. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the paraffin is a solid higher alkane mixture with a melting point of 40-80 ℃.

10. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the thixotropic agent is fumed silica.

11. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the initiator is one or the combination of more than one of benzoyl peroxide, cumene hydroperoxide, tert-butyl hydroperoxide, methyl ethyl ketone peroxide and dicumyl peroxide.

12. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the plasticizer is one or the combination of more than one of dimethyl phthalate, dibutyl phthalate, dioctyl sebacate, bisphenol A epoxy resin and bisphenol F epoxy resin.

13. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the thickening agent is one or the combination of more than one of organic bentonite, polyethylene wax and polyethylene micropowder.

14. The two-component acrylate structural adhesive which is fast cured under hot pressing and can be operated for a long time after being mixed at normal temperature as claimed in claim 1, wherein: the pigment is one or the combination of more than one of phthalocyanine blue, iron blue and oil soluble blue.

15. A preparation method of a bi-component acrylate structural adhesive which is fast cured by hot pressing and long in operable time after being mixed at normal temperature comprises the following processes:

preparation of component A:

weighing an acrylate monomer, core-shell rubber and a stabilizer, sequentially adding into a double-planet hybrid reaction kettle, and stirring and mixing;

after uniformly stirring, sequentially adding phosphate and an amine curing agent into the double-planet mixed power reaction kettle, and stirring and mixing;

after uniformly stirring, weighing an organic metal promoter, adding maleic acid or fumaric acid into a double-planet hybrid reaction kettle, and stirring and mixing;

after uniformly stirring, weighing the paraffin within the weight ratio range, wherein the paraffin needs to be dried in an oven at 80 ℃ to form liquid, adding the liquid into a double-planet mixed power reaction kettle while the liquid is hot, and stirring and mixing the liquid and the liquid;

after uniformly stirring, weighing the thixotropic agent in the weight ratio range, adding the thixotropic agent into a double-planet hybrid power reaction kettle, after uniformly stirring, vacuumizing to remove bubbles, and discharging to obtain a component A;

preparation of the component B:

weighing the plasticizer, the initiator and the pigment in the weight percentage range, adding the weighed materials into a double-planet hybrid reaction kettle, and stirring and mixing the materials;

weighing the thickening agent within the weight percentage range, adding the thickening agent into a double-planet hybrid reaction kettle, uniformly stirring, vacuumizing to remove bubbles, and discharging to obtain a component B;

the volume ratio of the component A to the component B is 10:1, and the components are respectively and independently packaged.

Technical Field

The invention relates to the field of adhesives, in particular to a double-component acrylate structural adhesive which is quickly cured by hot pressing and can be mixed at normal temperature for a long time and a preparation method thereof.

Background

The redox reaction type double-component adhesive acrylate structural adhesive has the advantages of rapid curing at room temperature, adjustable curing speed, convenience in use, easiness in operation, high mechanical strength, no need of strict surface treatment, oil surface bondability, wide range of bondable materials and the like. The method is mainly applied to the rapid positioning of plastics, metals and composite materials thereof, such as the structural member bonding in the industries of machinery, electronics, electrical appliances, automobiles, aerospace, aviation and the like, and the assembly of some small members, the assembly of large members, the maintenance of structural members and the like.

Volume mixing ratio 10: the acrylate structural adhesive 1 is known for excellent comprehensive performance, and has high bonding strength, wide bonding property, good toughness and excellent fatigue resistance; meanwhile, the acrylate has better damp heat and high and low temperature resistance, and the storage stability of the acrylate is greatly improved compared with that of the acrylate mixed in other proportions. The requirements of the electronic industry on the two aspects are generally higher, so that the acrylate structural adhesive is also well applied to some places of the rapidly developed electronic industry.

The curing mode of the current bi-component acrylate adhesive is generally to cure the glue at a specific temperature initially and then to achieve complete curing after 24 hours at room temperature. When the glue is initially cured and positioned, a certain pressure is required to be applied to a specific bonding area to prevent the bonding area from being displaced due to uncured glue, so that positioning failure is prevented. Therefore, the shorter the primary curing time is, the more beneficial the improvement of the production efficiency is, but at the same time, the too short curing time can cause the short operable time, and in the process of applying glue to the structure positioning and assembling, if the operation is not timely, the situation that the adhesive is not cured at the position or is cured before being bonded at the position occurs, and unnecessary waste can be caused.

Disclosure of Invention

The invention aims to provide a bi-component acrylate structural adhesive which is fast cured by hot pressing and long in operable time after being mixed at normal temperature and a preparation method thereof.

The method specifically comprises the following steps: the dual-component acrylate structural adhesive which is rapidly cured by hot pressing and can be operated for a long time after being mixed at normal temperature comprises a component A and a component B, and is characterized in that:

the component A comprises the following components in parts by weight:

the component B comprises the following components in parts by weight:

the A, B components have a volume ratio of 10: 1; and A, B components were stored separately.

The acrylate monomer is one or more of methacrylic acid, methyl methacrylate, ethyl methacrylate, isobornyl methacrylate, acryloyl morpholine, trimethylcyclohexane acrylate and cyclohexane dimethanol diacrylate.

Further, the core-shell particles are one or a combination of more than one of ABS, MBS, SBS, butadiene rubber core-shell particles and styrene butadiene rubber core-shell particles.

Further, the liquid rubber is one or a combination of more than one of liquid butadiene rubber, liquid isoprene rubber and liquid styrene-butadiene rubber.

The amine accelerator is one or a combination of more than one of ethylenediamine, propylenediamine, hexamethylenediamine, diethylamine, triethylamine, dipropylamine, tripropylamine, N-dimethyl-p-phenylenediamine, N-diethyl-p-toluidine, N-dihydroxyethyl-p-toluidine and benzyldimethylamine.

Further, the organic metal accelerant is one or the combination of more than one of cobalt naphthenate, cobalt acetate, manganese naphthenate and vanadium acetylacetonate.

The phosphate ester is one or more of PM-2, PM1500, PM1520, PM3030, PM3060, CD9050 and CD 9051.

Further, the stabilizer is one or the combination of more than one of hydroquinone, p-benzoquinone, 1, 4-naphthoquinone and 2, 6-di-tert-butyl-4-methylphenol.

Further, the paraffin is a solid higher alkane mixture with the melting point of 40-80 ℃.

Further, the thixotropic agent is fumed silica.

Further, the initiator is one or the combination of more than one of benzoyl peroxide, cumene hydroperoxide, tert-butyl hydroperoxide, methyl ethyl ketone peroxide and dicumyl peroxide.

Further, the plasticizer is one or a combination of more than one of dimethyl phthalate, dibutyl phthalate, dioctyl sebacate, bisphenol A epoxy resin and bisphenol F epoxy resin.

Further, the thickening agent is one or a combination of more than one of organic bentonite, polyethylene wax and polyethylene micropowder.

Further, the pigment is one or the combination of more than one of phthalocyanine blue, iron blue and oil soluble blue.

A preparation method of a bi-component acrylate structural adhesive which is fast cured by hot pressing and long in operable time after being mixed at normal temperature comprises the following processes:

preparation of component A:

weighing an acrylate monomer, core-shell rubber and a stabilizer, sequentially adding into a double-planet hybrid reaction kettle, and stirring and mixing;

after uniformly stirring, sequentially adding phosphate and an amine curing agent into the double-planet mixed power reaction kettle, and stirring and mixing;

after uniformly stirring, weighing the organic metal accelerant, adding maleic acid or fumaric acid into the double-planet hybrid reaction kettle, and stirring and mixing;

after uniformly stirring, weighing the paraffin within the weight ratio range, wherein the paraffin needs to be dried in an oven at 80 ℃ to form liquid, adding the liquid into a double-planet hybrid power reaction kettle while the liquid is hot, and stirring and mixing the liquid and the liquid;

after uniformly stirring, weighing the thixotropic agent in the weight ratio range, adding the thixotropic agent into a double-planet hybrid power reaction kettle, after uniformly stirring, vacuumizing to remove bubbles, and discharging to obtain a component A;

preparation of the component B:

weighing the plasticizer, the initiator and the pigment in the weight percentage range, adding the weighed materials into a double-planet hybrid reaction kettle, and stirring and mixing the materials;

weighing the thickening agent within the weight percentage range, adding the thickening agent into a double-planet hybrid reaction kettle, uniformly stirring, vacuumizing to remove bubbles, and discharging to obtain a component B;

the volume ratio of the component A to the component B is 10:1, and the components are respectively and independently packaged.

The method is technically characterized in that a metal catalyst is added, so that the primary curing time can be shortened, and the effect of faster shaping can be achieved under a certain heating and pressure maintaining condition; maleic acid or fumaric acid is further added, and the reaction time of the maleic acid or fumaric acid is prolonged at normal temperature by utilizing the group of the maleic acid or fumaric acid, so that the quick positioning at high temperature can be realized, and meanwhile, the operable time at normal temperature can be prolonged, generally 15-40 minutes, so that the acrylate structural adhesive can be quickly cured in a short time once high-temperature pressure maintaining is applied, and the operable time at normal temperature is longer before high-temperature pressure maintaining is applied, and enough time is reserved for the assembly of a complex process or a product; once the assembly is finished, high-temperature pressure maintaining is provided, and high hot-pressing strength can be achieved in a short time, so that the production efficiency is improved, and the yield is improved.

Detailed Description

The present invention will be described in detail with reference to specific examples.

Example 1

Preparation of component A: (1) sequentially adding 45 parts of methacrylic acid, 15 parts of methyl methacrylate, 18 parts of SBS core-shell particles, 5 parts of MBS core-shell particles, 10 parts of liquid isoprene rubber and 0.02 part of p-benzoquinone into a double-planet hybrid reaction kettle, and stirring and mixing; (2) after uniformly stirring, adding 1 part of PM-2 and 1.5 parts of N, N-dimethyl p-phenylenediamine into a double-planet mixed power reaction kettle, and stirring and mixing; (3) after uniformly stirring, adding 0.1 part of maleic acid, 0.8 part of manganese naphthoate and 1.2 parts of cobalt naphthoate into a double-planet hybrid reaction kettle, and stirring and mixing; (4) after stirring uniformly, adding 1.5 parts of paraffin into a double-planet hybrid reaction kettle, and stirring and mixing; (5) and (3) after uniformly stirring, adding 0.98 part of fumed silica into the double-planet hybrid reaction kettle, vacuumizing and removing bubbles after uniformly stirring, discharging to obtain a component A, and sealing and packaging.

Preparation of the component B: (1) adding 40 parts of benzoyl peroxide, 28 parts of bisphenol A epoxy resin, 14 parts of bisphenol F epoxy resin, 7 parts of dimethyl phthalate and 1 part of iron blue into a double-planet hybrid reaction kettle in sequence, and stirring and mixing. And (2) after uniformly stirring, adding 9 parts of polyethylene micro powder and 1 part of polyethylene wax into the double-planet hybrid reaction kettle, uniformly stirring, vacuumizing to remove bubbles, discharging to obtain a component B, and sealing and packaging.

And (3) respectively and independently packaging the component A and the component B according to the volume ratio of 10: 1.

Example 2

Preparation of component A: (1) sequentially adding 40 parts of methacrylic acid, 12.5 parts of ethyl methacrylate, 20 parts of SBS nucleocapsid particles, 8 parts of MBS nucleocapsid particles, 12 parts of liquid styrene-butadiene rubber and 0.05 part of p-benzoquinone into a double-planet hybrid reaction kettle, and stirring and mixing; (2) after uniformly stirring, adding 1 part of PM1500 and 1.2 parts of N, N-dimethyl p-phenylenediamine into a double-planetary hybrid reaction kettle, and stirring and mixing; (3) after uniformly stirring, adding 0.3 part of maleic acid, 1 part of manganese naphthoate and 2.6 parts of cobalt naphthoate into a double-planet hybrid reaction kettle, and stirring and mixing; (4) after stirring uniformly, adding 0.5 part of paraffin into a double-planet mixing power reaction kettle, and stirring and mixing; (5) and (3) after uniformly stirring, adding 0.75 part of fumed silica into the double-planet hybrid reaction kettle, vacuumizing and removing bubbles after uniformly stirring, discharging to obtain a component A, and sealing and packaging.

The component B is the same as in example 1; and (3) respectively and independently packaging the component A and the component B according to the volume ratio of 10: 1.

Example 3

Preparing a component A of the adhesive with the alkenoic acid ester structure: (1) sequentially adding 30 parts of methacrylic acid, 15 parts of methyl methacrylate, 5 parts of isobornyl methacrylate, 25 parts of ABS core-shell particles, 10 parts of butadiene rubber core-shell particles, 6 parts of liquid isoprene rubber and 0.05 part of hydroquinone into a double-planet hybrid reaction kettle, and stirring and mixing; (2) after uniformly stirring, adding 1 part of PM1520 and 1.2 parts of N, N-dimethyl p-phenylenediamine into a double-planet hybrid reaction kettle, and stirring and mixing; (3) after uniformly stirring, adding 0.5 part of maleic acid, 3 parts of cobalt acetate and 2 parts of cobalt naphthoate into a double-planet hybrid reaction kettle, and stirring and mixing; (4) after stirring uniformly, adding 0.5 part of paraffin into a double-planet hybrid reaction kettle, and stirring and mixing; (5) adding 0.75 part of fumed silica into the double-planet hybrid reaction kettle after uniformly stirring, vacuumizing to remove bubbles after uniformly stirring, discharging to obtain a component A, and sealing and packaging;

the component B is the same as in example 1; and (3) respectively and independently packaging the component A and the component B according to the volume ratio of 10: 1.

Example 4

Preparing a component A of the adhesive with the alkenoic acid ester structure: (1) sequentially adding 40 parts of methacrylic acid, 11 parts of ethyl methacrylate, 18 parts of ABS core-shell particles, 12 parts of MBS core-shell particles, 8 parts of liquid styrene-butadiene rubber and 0.05 part of p-benzoquinone into a double-planet hybrid reaction kettle, and stirring and mixing; (2) after uniformly stirring, adding 1 part of PM-2 and 1.2 parts of N, N-dihydroxyethyl p-toluidine into a double-planet hybrid reaction kettle, and stirring and mixing; (3) after uniformly stirring, adding 0.5 part of fumaric acid, 1 part of maleic acid, 2.5 parts of cobalt acetate and 3.5 parts of cobalt naphthanate into a double-planet hybrid reaction kettle, and stirring and mixing; (4) after stirring uniformly, adding 0.6 part of paraffin into a double-planet hybrid reaction kettle, and stirring and mixing; (5) after uniformly stirring, adding 0.65 part of fumed silica into the double-planet hybrid reaction kettle, after uniformly stirring, vacuumizing to remove bubbles, discharging to obtain a component A, and sealing and packaging;

the component B is the same as in example 1; and (3) respectively and independently packaging the component A and the component B according to the volume ratio of 10: 1.

Comparative example 1

Preparing a component A of the adhesive with the alkenoic acid ester structure: (1) adding 41.5 parts of methacrylic acid, 13.5 parts of ethyl methacrylate, 20 parts of ABS core-shell particles, 9 parts of SBS core-shell particles, 12 parts of liquid butadiene rubber and 0.05 part of hydroquinone into a double-planet hybrid reaction kettle in sequence, and stirring and mixing; (2) after uniformly stirring, adding 1 part of PM1520, 1.2 parts of N, N-dimethyl-p-phenylenediamine and 0.4 part of triethanolamine into a double-planet hybrid reaction kettle, and stirring and mixing; (3) after stirring uniformly, adding 0.6 part of paraffin into a double-planet hybrid reaction kettle, and stirring and mixing; (4) and (3) after uniformly stirring, adding 0.75 part of fumed silica into the double-planet hybrid reaction kettle, vacuumizing and removing bubbles after uniformly stirring, discharging to obtain a component A, and sealing and packaging.

The component B is the same as in example 1; and (3) respectively and independently packaging the component A and the component B according to the volume ratio of 10: 1.

Comparative example 2

Preparing a component A of the adhesive with the alkenoic acid ester structure: (1) adding 42 parts of methacrylic acid, 13.5 parts of ethyl methacrylate, 20 parts of ABS core-shell particles, 8 parts of SBS core-shell particles, 12 parts of liquid butadiene rubber and 0.05 part of hydroquinone into a double-planet hybrid reaction kettle in sequence, and stirring and mixing; (2) after uniformly stirring, adding 1 part of PM1520 and 1.3 parts of N, N-dimethyl p-phenylenediamine into a double-planet hybrid reaction kettle, and stirring and mixing; (3) after uniformly stirring, adding 0.5 part of cobalt acetate and 0.3 part of cobalt naphthanate into a double-planet hybrid reaction kettle, and stirring and mixing; (4) after stirring evenly, 0.6 part of paraffin is added into a double-planet mixed power reaction kettle and stirred and mixed; (5) after uniformly stirring, adding 0.75 part of fumed silica into the double-planetary hybrid reaction kettle, after uniformly stirring, vacuumizing to remove bubbles, discharging to obtain a component A, and sealing and storing;

the component B is the same as in example 1; and (3) respectively and independently packaging the component A and the component B according to the volume ratio of 10: 1.

Comparative example 3

Preparing a component A of the adhesive with the alkenoic acid ester structure: (1) adding 40 parts of methacrylic acid, 12.5 parts of ethyl methacrylate, 20 parts of ABS core-shell particles, 8 parts of SBS core-shell particles, 12 parts of liquid butadiene rubber and 0.05 part of hydroquinone into a double-planet hybrid reaction kettle in sequence, and stirring and mixing; (2) after uniformly stirring, adding 1 part of PM1520 and 1.2 parts of N, N-dimethyl p-phenylenediamine into a double-planet hybrid reaction kettle, and stirring and mixing; (3) after uniformly stirring, adding 2.5 parts of cobalt acetate and 1.4 parts of cobalt naphthanate into a double-planet hybrid reaction kettle, and stirring and mixing; (4) after stirring uniformly, adding 0.6 part of paraffin into a double-planet hybrid reaction kettle, and stirring and mixing; (5) after uniformly stirring, adding 0.75 part of fumed silica into the double-planet hybrid reaction kettle, after uniformly stirring, vacuumizing to remove bubbles, discharging to obtain a component A, and sealing and storing;

the component B is the same as in example 1; and (3) respectively and independently packaging the component A and the component B according to the volume ratio of 10: 1.

The examples and comparative examples were subjected to the following experiments to demonstrate their performance:

testing the curing time at normal temperature:

the reaction speed of the acrylate structure adhesive of the embodiment and the comparative example is represented by the time when the temperature of the glue rises to the highest temperature point after the component A and the component B are mixed according to the volume ratio of 10:1, and the specific technical scheme is as follows:

preparing glue and a glue gun, and storing the glue in an environment of 23 +/-2 ℃ for 2-6 hours to reach a constant temperature. The Testo 175T3 is inserted with a thermocouple, and the head of the thermocouple is wrapped by a small piece of aluminum foil paper, and the length of the wrapped aluminum foil paper is not less than 2 cm. 10g of glue is manually dispensed through a glue gun, the glue is dispensed as much as possible, the weight error is controlled to be +/-0.2 g, the dispensing time is controlled to be 30-60 s, and the beaker is immediately placed into heat-preservation cotton after the dispensing is finished. The thermocouple was then immediately inserted into the glue while the thermocouple was held by hand during the test to avoid dropping out (the thermocouple could be released after the glue cured). After the test was completed, the thermocouple was pulled out and the Testo 175T3 temperature recorder indicated the temperature at the highest temperature point and the time to reach that temperature. Shorter times indicate faster reaction of the acrylate structured gum, and vice versa indicate slower reaction.

And (3) testing the shear strength: performed according to GB/T7124-1986, the base material is aluminum sheet to aluminum sheet, and the curing condition is 25 ℃ 24H;

testing the hot pressing strength: setting the hot pressing temperature and the hot pressing time of a hot press, enabling an adhesive with A, B two uniformly mixed components to pass through a glue dispenser to form an adhesive surface with the area of 25.4mm × 12.5mm on an aluminum sheet, putting a sample piece with the glue dispensed into the hot press, overlapping the other aluminum sheet at the upper part, wherein the overlapping area of the other aluminum sheet is 25.4mm × 12.5mm, starting the hot press, taking out the sample piece after the hot pressing is finished, and testing after the sample piece is placed to the room temperature at the normal temperature; the hot pressing temperature is 70 ℃, 80 ℃, 90 ℃ and the hot pressing time is 1min, namely the hot pressing strength of the hot pressing at a certain temperature for 1 min.

Table one example and comparative example performance comparison table

As can be seen from table one above:

1. in the comparative example, comparative example 1 is the case of adding neither the organic metal accelerator nor the maleic acid and the fumaric acid, and although the curing time at normal temperature is long and can reach 14 minutes, the strength achieved by hot pressing in a short time is too low, that is, in the case of having a long operation time, the initial curing strength is difficult to quickly reach a high value, and a permanent fixation is required to ensure the curing effect, so the actual working efficiency of comparative example 1 is low;

2. comparative example 2 is a case where the organic metal accelerator was added but maleic acid and fumaric acid were not added, the curing time at normal temperature was short, and the strength achieved by the short hot pressing was low, and the effects of long working time and high initial curing strength could not be simultaneously obtained;

3. comparative example 3 is the case that more organic metal accelerators are added but maleic acid and rich maleic acid are not added compared with comparative example 2, and it can be seen from comparative example data that the addition of the organic metal accelerators is beneficial to the rapid curing of the structural adhesive, and although the hot-pressing initial curing strength is higher in comparative example 3, the normal temperature curing time is too short, the operable time is too short, the method is not suitable for products with complicated assembly structures or complicated assembly processes, and the practicability is not strong;

the operation time of the embodiment 1-4 can reach 15-40 minutes, and in the actual production process, the appropriate initial curing time can be adjusted according to requirements; under the condition of hot pressing at 70 ℃, 80 ℃ and 90 ℃ for 1 minute, the hot pressing strength quickly reaches a higher value, which means that under the condition that the normal-temperature curing time is prolonged, the initial curing strength is higher once the hot pressing is carried out, the initial curing can be realized in a shorter time, and the working efficiency is improved; compared with the comparative example 3, in the examples 1 to 4, under the condition that the time length of normal-temperature curing is effectively prolonged, the initial curing strength after hot pressing is lost to a certain extent, but the comparative examples 1 to 2 still increase a lot, which means that the time length of normal-temperature curing and the initial curing strength after hot pressing are balanced, two attributes are considered, and another effect is not lost due to single pursuit of a certain effect.

3. The shear strength at the normal temperature of 25 ℃ can be seen from the data in the table I, the data of the embodiments 1 to 4 are close to those of the comparative examples 2 to 3, and the data are superior to those of the comparative example 1, so that the product of the patent has no loss of the bonding effect, and the bonding effect is improved to a certain extent compared with the common structural adhesive.

The above-mentioned embodiments further illustrate the objects, technical solutions and advantages of the present invention in detail. The foregoing is merely exemplary of the present invention and is not intended to limit the invention thereto. Any modification, equivalent replacement, improvement and the like made within the content and principle of the present invention shall be included in the protection scope of the present invention.