CN112442320B - Rubber band glue for machine and preparation method thereof - Google Patents
Rubber band glue for machine and preparation method thereof Download PDFInfo
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- CN112442320B CN112442320B CN202011347782.8A CN202011347782A CN112442320B CN 112442320 B CN112442320 B CN 112442320B CN 202011347782 A CN202011347782 A CN 202011347782A CN 112442320 B CN112442320 B CN 112442320B
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- cyanoacrylate
- vinyl chloride
- vinyl acetate
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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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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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
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
Abstract
The invention provides a rubber band glue for a machine and a preparation method thereof, wherein the rubber band glue for the machine comprises the following raw materials in percentage by mass: 84-95% of alpha-cyanoacrylate, 4-15% of thickening agent and 0.02-1% of accelerator. The invention also provides a preparation method of the rubber band glue for the machine, which comprises the following steps: adding an accelerator into the alpha-cyanoacrylate, uniformly stirring at room temperature, then adding a thickening agent, and uniformly stirring to obtain the alpha-cyanoacrylate. The rubber band glue has good toughness and high bonding strength, and after being used for bonding the rubber band, the joint has good toughness, the glue layer is transparent, the whitening phenomenon is avoided, the fracture is not easy to occur, the bonding speed is high, the stability is good, the glue cannot become thick in the whole assembly line operation, and the bonding is not influenced.
Description
Technical Field
The invention relates to a rubber band adhesive for a machine and a preparation method thereof, belonging to the technical field of adhesives.
Background
The rubber band is a short ring made of rubber and latex, has the advantages of large elongation, good rebound resilience, low price, convenient use and the like, and has a larger application market. The rubber band needs to be bonded by using an adhesive during production, the existing rubber band needs to be bonded manually, but more and more factories for machining the rubber band by using a machine are used, the manual adhesive is not suitable for machine production, the general operation time is 4-5 seconds when the rubber band is bonded by the manual adhesive, and the operation time required by the rubber band for the machine is generally only about 2 seconds, so that the bonding speed of the manual adhesive is low, the adhesive is not suitable for bonding the rubber band by using the machine, the glue cannot become thick in the whole assembly line process, and the bonding is influenced otherwise.
Because of the characteristic of high anionic polymerization, the alpha-cyanoacrylate compound is polymerized and cured when meeting water, so that a certain adhesive force is generated on the surface of an adhesive material, the alpha-cyanoacrylate compound is commonly used for preparing adhesives, and the alpha-cyanoacrylate adhesive is usually cured by moisture, has high adhesive strength and high curing speed. However, the existing alpha-cyanoacrylate adhesive has the following defects: the adhesive layer is highly brittle and cannot withstand impact and elongation, and whitening is likely to occur.
Therefore, as more and more factories use machines to process rubber bands, the use of rubber band adhesives for machines gradually replaces manual adhesives, and the development of novel rubber band adhesives for machines based on alpha-cyanoacrylate, which have better toughness and stability and low whitening degree, is urgently needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a rubber band rubber for a machine and a preparation method thereof. The rubber band glue has good toughness and high bonding strength, and after being used for bonding the rubber band, the joint has good toughness, the glue layer is transparent, the whitening phenomenon is avoided, the fracture is not easy to occur, the bonding speed is high, the stability is good, and the glue does not become thick and affect the bonding when the glue is used in the whole assembly line operation.
The technical scheme of the invention is as follows:
the rubber band glue for the machine comprises the following raw materials in percentage by mass: 84-95% of alpha-cyanoacrylate, 4-15% of thickening agent and 0.02-1% of accelerator.
According to the invention, the alpha-cyanoacrylate is one or the combination of more than two of alpha-cyanoacrylate, alpha-cyanoacrylate methyl ester, alpha-cyanoacrylate n-butyl ester, alpha-cyanoacrylate tert-butyl ester, alpha-cyanoacrylate n-octyl ester, alpha-cyanoacrylate ethoxyethyl ester and alpha-cyanoacrylate methoxyethyl ester; preferably, the α -cyanoacrylate is ethyl α -cyanoacrylate.
According to the invention, the thickener is preferably one or the combination of more than two of ethylene acrylate rubber, vinyl chloride-vinyl acetate copolymer and vinyl chloride-vinyl acetate terpolymer; preferably, the thickening agent is a vinyl chloride-vinyl acetate terpolymer;
more preferably, the ethylene acrylate rubber is an ethylene copolymer with the mass content of methyl acrylate of 8-40%, and the weight average molecular weight of the ethylene acrylate rubber is 5-10 ten thousand;
more preferably, the vinyl chloride-vinyl acetate copolymer is a vinyl chloride-vinyl acetate polymer, wherein the mass content of vinyl chloride is 85.5-86.5%, and the weight average molecular weight of the vinyl chloride-vinyl acetate copolymer is 1-1.5 ten thousand;
further preferably, the vinyl chloride-vinyl acetate terpolymer is a terpolymer of vinyl chloride, vinyl acetate and maleic acid, and the mass contents of the components are respectively as follows: 84% of vinyl chloride, 15% of vinyl acetate and 1% of maleic acid; the weight average molecular weight of the vinyl chloride-vinyl acetate terpolymer is 1-5 ten thousand;
according to the invention, the accelerator is preferably one or the combination of more than two of calixarene, polyether polyol, polyethylene glycol and polyethylene glycol diacrylate; preferably, the accelerator is a polyether polyol;
further preferably, the calixarene is p-tert-butylcalix [4] arene and/or oxacalixarene; the polyether polyol is one or the combination of more than two of polyoxypropylene glycol, polytetrahydrofuran glycol, tetrahydrofuran-propylene oxide copolymer glycol and trifunctional polytetrahydrofuran polyol, the weight average molecular weight of the polyoxypropylene glycol is 650-4000, the weight average molecular weight of the polytetrahydrofuran glycol is 650-2000, the weight average molecular weight of the tetrahydrofuran-propylene oxide copolymer glycol is 1000-4000, and the weight average molecular weight of the trifunctional polytetrahydrofuran polyol is 650-6000; the polyethylene glycol is one or the combination of more than two of polyethylene glycol 400, polyethylene glycol 2000, polyethylene glycol 6000 and polyethylene glycol 12000; the polyethylene glycol diacrylate is polyethylene glycol 600 diacrylate or polyethylene glycol 400 diacrylate.
According to the invention, the preparation method of the rubber band glue for the machine comprises the following steps:
adding an accelerator into the alpha-cyanoacrylate, stirring uniformly at room temperature, then adding a thickening agent, and stirring uniformly to obtain the alpha-cyanoacrylate.
According to the invention, the viscosity of the rubber band glue for the machine can be adjusted by adjusting the proportion of the thickening agent to the alpha-cyanoacrylate, so that the rubber band glue is suitable for bonding rubber bands with different diameters.
The invention has the following technical characteristics and beneficial effects:
1. according to the invention, a specific kind of accelerant is applied to the raw material system, so that the polymerization speed, namely the bonding speed of the adhesive can be effectively controlled, the adhesive disclosed by the invention can have a higher bonding speed, the requirement of a machine for bonding a rubber band is met, and meanwhile, the quality guarantee period of the obtained rubber band adhesive for the machine is longer. If the accelerator of the invention is replaced by crown ethers such as 18-crown-6, the shelf life of the adhesive is greatly reduced.
2. The structure of the thickener used by the rubber band glue for the machine is similar to the main structure of alpha-cyanoacrylate, the compatibility is better, the thickener can be dissolved without heating, the flexibility of the obtained glue is good, and the toughness of the joint is good after the rubber band is bonded.
3. The components of the rubber band adhesive for the machine have the combined action, so that the rubber band adhesive for the machine has higher flexibility, higher bonding speed, stronger shear strength and longer quality guarantee period, is not easy to whiten, and is attractive after being applied to bonding of the rubber band, and the bonded part is not whitened; and the joint has good flexibility, no brittleness, strong bonding effect, impact resistance and extension resistance. The rubber band glue for the machine has good stability, and the glue does not become thick in the whole flow line operation and does not influence the bonding.
4. The rubber band glue for the machine has simple production process, can be produced by simple stirring, and is convenient for large-scale production and use.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
Meanwhile, the experimental methods described in the following examples are all conventional methods unless otherwise specified; the reagents and materials are commercially available, unless otherwise specified.
The vinyl chloride-vinyl acetate terpolymer used in the embodiment is a terpolymer of vinyl chloride, vinyl acetate and maleic acid, and the mass contents of the components are as follows: 84% of vinyl chloride, 15% of vinyl acetate and 1% of maleic acid; the weight average molecular weight of the vinyl chloride-vinyl acetate terpolymer is 4 ten thousand.
The ethylene acrylate rubber used in the examples was an ethylene copolymer having a methyl acrylate mass content of 20% and a weight average molecular weight of 8 ten thousand.
The polyether polyol used in the examples was a polyoxypropylene diol having a weight average molecular weight of 2000; the calixarene used is p-tert-butylcalix [4] arene.
The waste solid ethyl α -cyanoacrylate used in the comparative example was prepared as follows:
crushing the cured alpha-ethyl cyanoacrylate glue water product for 10min by a water-cooled hammer mill, and sieving the crushed solid by a 100-mesh sieve to obtain waste solid alpha-ethyl cyanoacrylate; the model of the water-cooled hammer mill is CF-400A; the alpha-ethyl cyanoacrylate glue is a product which is commonly sold in the field.
Example 1
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 92.5% of alpha-ethyl cyanoacrylate, 7% of vinyl chloride-vinyl acetate terpolymer and 0.5% of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve the vinyl chloride-vinyl acetate terpolymer, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
Example 2
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 91.5% of alpha-ethyl cyanoacrylate, 8% of vinyl chloride-vinyl acetate terpolymer and 0.5% of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
Example 3
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 89.5 percent of alpha-ethyl cyanoacrylate, 10 percent of vinyl chloride-vinyl acetate terpolymer and 0.5 percent of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
Example 4
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 86.5% of alpha-ethyl cyanoacrylate, 13% of vinyl chloride-vinyl acetate terpolymer and 0.5% of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
Example 5
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 86.98% of alpha-ethyl cyanoacrylate, 13% of vinyl chloride-vinyl acetate terpolymer and 0.02% of calixarene.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding calixarene, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve the vinyl chloride-vinyl acetate terpolymer, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
Example 6
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 86.85% of alpha-cyano ethyl acrylate, 13% of vinyl chloride-vinyl acetate terpolymer and 0.15% of polyethylene glycol 600 diacrylate.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyethylene glycol 600 diacrylate, and uniformly stirring at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve the vinyl chloride-vinyl acetate terpolymer, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
Example 7
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 91.5% of alpha-ethyl cyanoacrylate, 8% of ethylene acrylate rubber and 0.5% of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding ethylene acrylate rubber, stirring at room temperature for dissolving, and then stirring for 0.5h to obtain the product.
Comparative example 1
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 92.5 percent of alpha-ethyl cyanoacrylate, 7 percent of vinyl chloride-vinyl acetate terpolymer and 18-crown-60.5 percent.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding 18-crown-6, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve the vinyl chloride-vinyl acetate terpolymer, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
In this comparative example 18-crown-6 was used as accelerator instead of polyether polyol.
Comparative example 2
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 92.5% of alpha-ethyl cyanoacrylate, 7% of waste solid alpha-ethyl cyanoacrylate and 0.5% of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the waste solid alpha-cyano ethyl acrylate, heating to 75 ℃, stirring for dissolving, and then stirring for 0.5h to obtain the alpha-cyano ethyl acrylate.
In the comparative example, the thickener used waste solid alpha-cyanoacrylate instead of the vinyl chloride-vinyl acetate terpolymer.
Comparative example 3
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 92.5 percent of alpha-ethyl cyanoacrylate, 7 percent of polymethyl methacrylate and 0.5 percent of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; and adding polymethyl methacrylate, heating to 75 ℃, stirring to dissolve, and stirring for 0.5h to obtain the nano-composite material.
In this comparative example, polymethyl methacrylate was used as the thickener instead of the vinyl chloride-vinyl acetate terpolymer.
Comparative example 4
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 81.5% of alpha-ethyl cyanoacrylate, 18% of vinyl chloride-vinyl acetate terpolymer and 0.5% of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve the vinyl chloride-vinyl acetate terpolymer, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
The proportion of thickener in this comparative example was too high.
Comparative example 5
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 97.5 percent of alpha-ethyl cyanoacrylate, 2 percent of vinyl chloride-vinyl acetate terpolymer and 0.5 percent of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve the vinyl chloride-vinyl acetate terpolymer, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
The proportion of thickener in this comparative example was too low.
Comparative example 6
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 91% of alpha-ethyl cyanoacrylate, 7% of vinyl chloride-vinyl acetate terpolymer and 2% of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve the vinyl chloride-vinyl acetate terpolymer, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
The proportion of accelerator in this comparative example was too high.
Comparative example 7
The rubber band glue for the machine comprises the following raw materials in percentage by mass: 92.99% of alpha-ethyl cyanoacrylate, 7% of vinyl chloride-vinyl acetate terpolymer and 0.01% of polyether polyol.
The preparation method of the rubber band glue for the machine comprises the following steps:
adding alpha-ethyl cyanoacrylate into a three-neck flask, adding polyether polyol, and stirring uniformly at room temperature; then adding the vinyl chloride-vinyl acetate terpolymer, stirring at room temperature to dissolve the vinyl chloride-vinyl acetate terpolymer, and then stirring for 0.5h to obtain the vinyl chloride-vinyl acetate copolymer.
The proportion of accelerator in this comparative example was too low.
Test examples
The machine rubber band adhesives prepared in examples 1 to 7 and comparative examples 1 to 7 were subjected to tests of toughness, bonding speed, shear strength, and shelf life.
Test 1, flexibility test:
taking a piece of roll paper, rolling the roll paper into a rod shape, holding one end of the roll paper to be immersed in glue, performing a 90-degree bending test after the glue is completely cured, recording the bending times until the glue layer cured on the surface of the roll paper is broken, wherein the more the bending times are, the better the flexibility is, and the results are shown in table 1.
Test 2, bonding speed:
and (3) carrying out a bonding test on the rubber bands with different diameters under the test conditions that the temperature is 23 +/-2 ℃ and the relative humidity is 60 +/-10%, and counting from the beginning of butt joint until the joint does not automatically fall off, so that the bonding speed of the rubber bands is obtained.
Test 3, shear strength:
according to the test piece specified in GB/T7124, 200-240-mesh abrasive cloth is used for transversely polishing the test piece (the polishing area cannot be smaller than the bonding area, the polishing area is cleaned by using an aqueous solution of washing powder or other washing agents, then the water is used for cleaning, then acetone is used for cleaning, the test piece is placed in a silica gel dryer for standby use within one week), then 2-3 drops of a sample are dripped into a 2g bottle on the bonding surface of a flat test piece, another test piece (the bonding area is 12.5mm multiplied by 25mm) is immediately attached to the bonding surface of the flat test piece, the test piece is fixed by a clamp, the test piece is placed for 24 hours under the test conditions that the temperature is 23 +/-2 ℃ and the relative humidity is 60 +/-10%, and then the shear strength is tested by using an electronic universal material testing machine, and the specific test method is as follows: fixing two ends of the test piece at two joints of the testing machine by iron pins respectively, starting the testing machine to move until the bonding parts of the two test pieces are pulled apart, and converting the force used by the testing machine by a computer. The results are shown in Table 1.
Test 4, shelf life test
(1) The time required for curing the prepared rubber band adhesive for a machine at 72 ℃ was measured, and the longer the time required for curing, the longer the shelf life.
(2) The prepared machine was stored with rubber band glue at room temperature and the time to cure the glue was recorded. The results are shown in Table 1.
TABLE 1 examples and data for performance testing of machine rubber band adhesives prepared in comparative examples
As can be seen from table 1, the rubber band glue for machines prepared in the embodiment of the present invention has good flexibility, so that brittleness of the glue layer after curing is reduced, and flexibility of the joints after the rubber band is bonded is improved; the rubber band for the machine prepared in the embodiment 1 has the best quality, and the rubber bands with different diameters can be bonded by preparing glue with different viscosities by respectively increasing the content of the vinyl chloride-vinyl acetate copolymer in the embodiments 2, 3 and 4, so that a better effect is also obtained; example 5 shelf life of rubber band for machine use obtained with p-tert-butylcalix [4] arene as accelerator was slightly shorter than that of polyether polyol; example 6 machine rubber band glue with polyethylene glycol 600 diacrylate as accelerator was slightly slower than the polyether polyol; the machine rubber band glue using the ethylene acrylate rubber as the thickening agent in the example 7 is slightly slower in bonding speed than the polyether polyol, but the rubber band glue prepared in the examples 6 to 7 can meet the requirements of the machine adhesive. The rubber band rubber for machine use prepared in the examples was superior in performance to the product of the comparative example.
As can be seen by comparing the example 1 with the comparative example 1, the polyether polyol is used as the accelerating agent, the quality guarantee period of the rubber band glue for the machine is longest, the 18-crown-6 is used as the accelerating agent in the comparative example 1, and the quality guarantee period of the rubber band glue for the machine is greatly shortened; comparative example 2 the waste solid alpha-cyanoacrylate was used as a thickener, although the shelf life of the rubber band adhesive for machine was long and the cost was low, the brittleness and toughness of the adhesive layer was high, and the adhesive layer could be broken off after 2 times of testing; comparative example 3 polymethyl methacrylate is used as a thickening agent, and the obtained rubber band rubber for machines has high brittleness and poor toughness; it can be seen from comparison between example 1 and comparative examples 4 and 5 that too high a proportion of the thickener reduces the adhesion rate of the elastic band, and too low a proportion of the thickener affects the flexibility of the adhesive layer. Therefore, the kind and the ratio of the thickener are limited to the scope of the present invention. Comparing example 1 with comparative example 6 and comparative example 7, it can be seen that the ratio of the accelerator is too high, the shelf life of the glue is greatly shortened, and the ratio of the accelerator is too low, which affects the bonding speed of the glue. Therefore, the kind and ratio of the accelerator are limited within the scope of the present invention.
The above embodiments are merely exemplary in nature. It will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The rubber band glue for the machine is characterized by comprising the following raw materials in percentage by mass: 84-95% of alpha-cyanoacrylate, 4-15% of thickening agent and 0.02-1% of accelerator;
the alpha-cyanoacrylate is one or the combination of more than two of alpha-cyanoacrylate, alpha-methyl cyanoacrylate, alpha-n-butyl cyanoacrylate, alpha-tert-butyl cyanoacrylate, alpha-n-octyl cyanoacrylate, alpha-ethoxyethyl cyanoacrylate and alpha-methoxyethyl cyanoacrylate;
the thickening agent is one or the combination of more than two of ethylene acrylate rubber, vinyl chloride-vinyl acetate copolymer and vinyl chloride-vinyl acetate terpolymer;
the accelerant is one or the combination of more than two of calixarene, polyether glycol and polyethylene glycol diacrylate; the polyether polyol is one or the combination of more than two of polyoxypropylene diol, polytetrahydrofuran diol, tetrahydrofuran-propylene oxide copolymerization diol and trifunctional polytetrahydrofuran polyol.
2. A rubber band-type machine adhesive according to claim 1, wherein said α -cyanoacrylate is ethyl α -cyanoacrylate.
3. The machine elastic band rubber according to claim 1, wherein the thickener is a vinyl chloride-vinyl acetate terpolymer.
4. A rubber-band rubber for machines as claimed in claim 1, wherein said ethylene acrylate rubber is an ethylene copolymer containing 8-40% by mass of methyl acrylate, and has a weight average molecular weight of 5-10 ten thousand; the vinyl chloride-vinyl acetate copolymer is a vinyl chloride-vinyl acetate polymer, wherein the mass content of vinyl chloride is 85.5-86.5%, and the weight average molecular weight of the vinyl chloride-vinyl acetate copolymer is 1-1.5 ten thousand; the vinyl chloride-vinyl acetate terpolymer is a terpolymer of vinyl chloride, vinyl acetate and maleic acid, and the mass contents of the components are respectively as follows: 84% of vinyl chloride, 15% of vinyl acetate and 1% of maleic acid; the weight average molecular weight of the vinyl chloride-vinyl acetate terpolymer is 1-5 ten thousand.
5. The machine rubber according to claim 1, wherein the accelerator is a polyether polyol.
6. The machine elastic according to claim 1, wherein the calixarene is p-tert-butylcalix [4] arene and/or oxacalixarene.
7. The rubber band for machine use according to claim 1, wherein the weight average molecular weight of the polyoxypropylene diol is 650-4000, the weight average molecular weight of the polytetrahydrofuran diol is 650-2000, the weight average molecular weight of the tetrahydrofuran-oxypropylene copolyol is 1000-4000, and the weight average molecular weight of the trifunctional polytetrahydrofuran polyol is 650-6000.
8. The machine elastic band rubber of claim 1, wherein the polyethylene glycol diacrylate is polyethylene glycol 600 diacrylate or polyethylene glycol 400 diacrylate.
9. The method for preparing rubber band rubber for machine use of claim 1, comprising the steps of:
adding an accelerator into the alpha-cyanoacrylate, stirring uniformly at room temperature, then adding a thickening agent, and stirring uniformly to obtain the alpha-cyanoacrylate.
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2020
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| US4170585A (en) * | 1977-08-05 | 1979-10-09 | Toagosei Chemical Industry Co., Ltd. | Adhesive composition |
| US4444933A (en) * | 1982-12-02 | 1984-04-24 | Borden, Inc. | Adhesive cyanoacrylate compositions with reduced adhesion to skin |
| US4845151A (en) * | 1988-04-07 | 1989-07-04 | Illinois Tool Works, Inc. | Thixotropic cyanoacrylate adhesive composition |
| CN101160330A (en) * | 2005-05-30 | 2008-04-09 | 东亚合成株式会社 | 2-cyanoacrylate composition |
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| CN112442320A (en) | 2021-03-05 |
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