CN114316449B - Mixing process for bonding ethylene propylene diene monomer and cotton rope - Google Patents
Mixing process for bonding ethylene propylene diene monomer and cotton rope Download PDFInfo
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Abstract
The application discloses a mixing process for bonding ethylene propylene diene monomer and a rope, which comprises the following steps of mixing ethylene propylene diene monomer for 1-3min at 110-140 ℃ in an internal mixer; adding an anti-aging agent, tackifying resin and a methylene acceptor, and mixing for 2-4 min; adding white carbon black, a reinforcing system and paraffin oil, banburying for 4-8 min, and discharging rubber at 130-150 ℃ to obtain a section of rubber compound; two-stage mixing: the first section of rubber compound is cooled to room temperature after passing through a roller, banburying is carried out for 20s to 50s at 80 ℃ to 100 ℃, then methylene donor, auxiliary vulcanizing agent and vulcanizing agent are added for heat preservation and mixing for 2min to 5min, then rubber discharging is carried out at 80 ℃ to 100 ℃, and finally vulcanization is carried out after cutting knife, thin pass and sheet discharging. In the method, the methylene donor and the methylene acceptor are added into the ethylene-propylene-diene monomer stepwise, so that the possibility of reaction of the methylene donor and the methylene acceptor before the vulcanization reaction occurs is reduced, and the bonding performance between the ethylene-propylene-diene monomer and the rope is improved.
Description
Technical Field
The application relates to the technical field of rubber product preparation, in particular to a mixing process for bonding ethylene propylene diene monomer and a cotton rope.
Background
Most of the rubber products are made of composite materials at present, namely, different framework materials and reinforcing materials are added into a rubber base material to obtain rubber-framework material composite products with different properties.
When the ethylene propylene diene monomer is selected as a rubber material and the rope is selected as a framework material, the ethylene propylene diene monomer molecular chain lacks an active gene, and the molecular cohesion energy is small, the self-viscosity and the mutual viscosity are poor, so that the adhesion between the ethylene propylene diene monomer and the rope is difficult, the adhesion performance between the ethylene propylene diene monomer and the rope is poor, and the ethylene propylene diene monomer composite product is limited to a certain extent in application.
In the related art, the meta-alpha white system is adopted as a tackifier, and is added into the ethylene-propylene-diene monomer rubber together with an auxiliary agent such as a vulcanizing agent for mixing, but the tackifying effect of the meta-alpha white system is poor, the bonding strength between the ethylene-propylene-diene monomer rubber and a rope is only 38.2KN/m, and the bonding strength between the ethylene-propylene-diene monomer rubber and the rope needs to be further developed.
Disclosure of Invention
In order to improve the bonding performance of the ethylene-propylene-diene monomer and the cotton rope, the application provides a mixing process for bonding the ethylene-propylene-diene monomer and the cotton rope.
The mixing process for bonding the ethylene propylene diene monomer and the cotton rope adopts the following technical scheme:
a mixing process for bonding ethylene propylene diene monomer and a rope comprises the following steps:
and (3) mixing: after the ethylene propylene diene monomer is mixed, adding an anti-aging agent, tackifying resin and methylene acceptor into the ethylene propylene diene monomer, and mixing for 2-4 min at 110-140 ℃; adding white carbon black, a reinforcing system and paraffin oil, carrying out heat preservation banburying for 4-8 min, and discharging rubber at 130-150 ℃ to obtain a section of rubber compound;
two-stage mixing: the first section of rubber compound is banburying for 20s to 50s at 80 ℃ to 100 ℃ after being cooled by a roller, then methylene donor, auxiliary vulcanizing agent and vulcanizing agent are added for heat preservation and mixing for 2 to 5min, then rubber discharging is carried out at 80 ℃ to 100 ℃, and finally vulcanization is carried out after cutting knife, thin pass and sheet discharging;
the additive comprises, by 100 parts of ethylene propylene diene monomer, 5-20 parts of vulcanizing agent, 5-20 parts of auxiliary vulcanizing agent, 5-14 parts of methylene acceptor and methylene donor, 10-30 parts of white carbon black, 10-30 parts of non-reactive alkyl phenolic resin, 30-60 parts of reinforcing system and 3-10 parts of antioxidant.
By adopting the technical scheme, the methylene acceptor and the methylene donor are added to the ethylene propylene diene monomer in steps, so that the possibility of reaction of the methylene acceptor and the methylene donor before the vulcanization step is reduced. Compared with the traditional one-stage mixing method, the methylene acceptor and the methylene donor react in the vulcanization process to generate the phenolic resin with oligomerization and continuous reaction capability, and the hydroxymethyl and the hydroxyl in the phenolic resin are chemically bonded with polar groups (-OH, -COOH and the like) on the surface of the cotton rope;
in addition, as the methylene acceptors do not react in the mixing process, compared with a traditional one-stage mixing method, the method can improve the mixing temperature in one-stage mixing step, improve the dispersion condition of the auxiliary agents such as the methylene acceptors in the ethylene-propylene-diene rubber, and is beneficial to improving the vulcanization characteristic of the ethylene-propylene-diene rubber; meanwhile, the water content in the ethylene-propylene-diene monomer can be sufficiently reduced, and the bonding strength between the ethylene-propylene-diene monomer and the cotton rope can be further improved;
the methylene acceptor, the methylene donor and the tackifying resin are compounded for use, so that the synergistic effect is realized in the aspect of improving the self-adhesive property of the ethylene-propylene-diene-monomer rubber, the three substances activate the ethylene-propylene-diene-monomer rubber molecular chain, and the diffusion entanglement capability of the ethylene-propylene-diene-monomer rubber molecular chain is improved, so that the ethylene-propylene-diene-monomer rubber can fully infiltrate into a cotton rope before vulcanization reaction, and can be rapidly diffused into the cotton rope, the adhesive property of the ethylene-propylene-diene-monomer rubber and the cotton rope is remarkably improved, and the rubber coating rate of the ethylene-propylene-diene-monomer rubber on the cotton rope can reach 100%.
Optionally, the vulcanizing agent is any one of diisopropyl benzene peroxide, 1, 3-bis (tert-butylperoxy diisopropyl) benzene and 2, 5-dimethyl-2, 5- (di-tert-butylperoxy) hexane.
Optionally, the co-vulcanizing agent is N, N, -m-phenylene bismaleimide.
By adopting the technical scheme, the vulcanizing agent in the application selects the peroxide vulcanizing system, compared with the traditional sulfur vulcanizing system, the peroxide vulcanizing has better heat resistance, but the general adhesiveness of the peroxide vulcanizing system is poorer, so that the defect of poor adhesiveness of the peroxide vulcanizing system is overcome by matching the peroxide vulcanizing system with the maleamide auxiliary vulcanizing agent, the adhesive strength of the ethylene-propylene-diene monomer is further improved, and the adhesive coverage rate of the ethylene-propylene-diene monomer is up to 100 percent.
Optionally, the methylene acceptor is any one of RE, RS, R-80 and PN760, and the methylene donor is any one of RA and HMMM.
Preferably, the methylene acceptor selects PN760, the methylene donor selects RA, and the weight ratio of PN760 to RA is (3-8): 2-6.
Through adopting above-mentioned technical scheme, PN760 and RA cooperation use and PN760 is excessive slightly, can promote the crosslinked density between ethylene propylene diene monomer and the cotton rope effectively, and its reason is as follows:
firstly, because PN760 is acidic, an acidic group can prevent free radical from generating, delay vulcanization and prolong positive vulcanization time, so that the crosslinking density between PN760 and RA, the crosslinking density between tackifying resin formed by the reaction of PN760 and RA and ethylene-propylene-diene monomer rubber and a rope are increased, the infiltration effect of the ethylene-propylene-diene monomer rubber on the rope is further improved, and the adhesive property and the rubber coating rate between the ethylene-propylene-diene monomer rubber and the rope are improved; secondly, the polar groups contained in PN760 and RA can be bonded with the polar groups on the surface of the thread rope, so that the bonding performance and the coating rate between the ethylene propylene diene monomer and the thread rope are further improved.
Preferably, in the step S1, a vinyl silane coupling agent is further added, the weight ratio of the vinyl silane coupling agent to the white carbon black is 1:10, and the vinyl silane coupling agent is banburying together with the white carbon black.
By adopting the technical scheme, the vinyl silane coupling agent reacts with silanol groups in the mixing process to modify the surface of the white carbon black, so that the activity of the white carbon black is reduced to reduce the influence on vulcanization, the combination of the white carbon black and rubber macromolecules is promoted, the dispersibility of sizing materials is improved, the formation of a filler network is lightened, and the vulcanization characteristic, comprehensive physical properties, dynamic properties and processability of the white carbon black reinforced ethylene-propylene-diene monomer are improved; compared with the traditional silane coupling agent Si-69, the vinyl silane coupling agent is more suitable for peroxide vulcanization systems.
Preferably, the tackifying resin is a non-reactive alkyl phenol resin.
By adopting the technical scheme, the phenolic hydroxyl groups contained in the non-reactive alkyl phenolic resin have good polarity, and can migrate to the surface of the ethylene-propylene-diene monomer when being added into the ethylene-propylene-diene monomer, so that the condition of poor interfacial compatibility between the ethylene-propylene-diene monomer and the thread rope is improved, and the bonding strength and the coating rate between the ethylene-propylene-diene monomer and the thread rope are improved; the non-reactive alkyl phenolic resin has nonpolar alkyl chain and good compatibility with ethylene-propylene-diene monomer, and can be completely dispersed in the ethylene-propylene-diene monomer in the banburying process, thereby being beneficial to improving the processability of the ethylene-propylene-diene monomer.
Optionally, the reinforcing system is one or more of carbon black N330 and carbon black N550.
Preferably, the reinforcing system is formed by compounding carbon black N330 and carbon black N550 according to a weight ratio of 1:1.
By adopting the technical scheme, the positive vulcanization time of the ethylene-propylene-diene monomer rubber can be prolonged by compounding the carbon black N330 and the carbon black N550 compared with the white carbon black; and the carbon black N330 and the carbon black N550 have moderate structures, can fully disperse in the ethylene-propylene-diene monomer while playing a good role in reinforcing the ethylene-propylene-diene monomer, and do not influence the bonding performance between the ethylene-propylene-diene monomer and the rope.
Optionally, the anti-aging agent is one or more of RD, MB, BLE.
By adopting the technical scheme, the anti-aging agent improves the heat resistance of the ethylene-propylene-diene monomer and other auxiliary agents in the banburying process, and reduces the possibility of scorching of the ethylene-propylene-diene monomer and other auxiliary agents.
In summary, the present application has the following beneficial effects:
1. according to the method, the methylene acceptor and the methylene donor are fed into the ethylene-propylene-diene monomer in steps for banburying, so that the methylene acceptor and the methylene donor do not react before vulcanization reaction, and are combined with tackifying resin, the ethylene-propylene-diene monomer molecular chain is activated, the interfacial compatibility between the ethylene-propylene-diene monomer and a rope is improved, the ethylene-propylene-diene monomer molecular chain can fully infiltrate the rope before vulcanization reaction, the ethylene-propylene-diene monomer molecular chain is fully attached to the rope during vulcanization reaction, the adhesive property between the ethylene-propylene-diene monomer and the rope is improved, and the adhesive coverage rate can reach 100%.
2. In the application, the peroxide vulcanization system and the maleic amide auxiliary vulcanization agent are preferably adopted, and the defect of poor adhesiveness of the peroxide vulcanization system is overcome by matching the peroxide vulcanization system with the maleic amide auxiliary vulcanization agent, so that the adhesive strength of the ethylene-propylene-diene monomer is further improved.
3. PN760 and RA are preferably selected to be matched in the method, so that the crosslinking density between the ethylene-propylene-diene monomer and the thread rope is effectively improved, and the bonding performance and the coating rate between the ethylene-propylene-diene monomer and the thread rope are effectively improved.
Drawings
FIG. 1 is a comparative graph of the present application in an on-line rope peel test of example 1 and comparative example 1, wherein the left side is example 1 and the right side is comparative example 1;
fig. 2 is a comparative graph of the present application in the on-line rope draw test of example 1 and comparative example 1, wherein the left side is example 1 and the right side is comparative example 1.
Detailed Description
The sources of the raw materials in the examples and comparative examples in this application are shown in Table 1 below unless otherwise specified.
TABLE 1 sources of raw materials
Examples
Example 1
A mixing process for bonding ethylene propylene diene monomer and a rope comprises the following steps:
based on 100 parts of ethylene propylene diene monomer, 5 parts of an anti-aging agent RD, 5 parts of an anti-aging agent MB, 30 parts of non-reactive alkyl phenolic resin, 6 parts of a methylene acceptor PN760, 5-5 parts of white carbon EH, 3 parts of vinyl triacetoxy silane, 330 parts of carbon black N, 550 parts of carbon black N, 10 parts of paraffin oil, 658 parts of a methylene donor RA, 10 parts of a vulcanizing aid HVA-2 and 10 parts of diisopropyl peroxide;
the method comprises the following steps of:
and (3) mixing: adding ethylene propylene diene monomer into an internal mixer at 140 ℃, carrying out heat preservation and mixing for 60 seconds, and then adding an antioxidant RD, an antioxidant MB, non-reactive alkyl phenolic resin and a methylene acceptor PN760, carrying out heat preservation and mixing for 2 minutes; adding white carbon black EH-5, vinyl triacetoxy silane, carbon black N330, carbon black N550 and paraffin oil, carrying out heat preservation banburying for 4min, and then discharging rubber at 150 ℃ to obtain a section of rubber compound;
two-stage mixing: after passing the first section of rubber compound through a roller for 3 times, cooling to 25 ℃, then placing the first section of rubber compound into an internal mixer at 100 ℃ for banburying for 20 seconds, adding a methylene donor RA-65, a vulcanization aid HVA-2 and diisopropyl peroxide, carrying out heat preservation and mixing for 2 minutes, then carrying out rubber discharging at 100 ℃, placing into left and right cutters in an open mill for 5 times, carrying out thin pass for 6 times, discharging tablets, and heating to 160 ℃ after placing for 8 hours, and vulcanizing for 30 minutes.
Example 2
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of the embodiment 1 in that a vulcanization assisting agent TMPTMA and other mass replacement HVA-2 are used.
Example 3
The mixing process for bonding ethylene propylene diene monomer and cord is different from example 1 in that the combination of methylene acceptor and methylene donor is different and the equal mass of RE is used to replace PN760.
Example 4
A mixing process for bonding ethylene propylene diene monomer and a rope is different from example 1 in that a combination of a methylene acceptor and a methylene donor is different from that of example 1, and HMMM is used for replacing RA-65 with equal mass.
Example 5
A mixing process for bonding ethylene propylene diene monomer and a string is different from that of example 1 in that a combination of a methylene acceptor and a methylene donor is different from that of example 1 in that PN760 is replaced by RE and RA-65 is replaced by HMMM.
Example 6
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of example 1 in that PN760 and RA-65 are different in weight parts, wherein the PN760 is 8 weight parts, and the RA-65 is 2 weight parts.
Example 7
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of example 1 in that PN760 and RA-65 are different in weight parts, the PN760 is 3 weight parts, and the RA-65 is 6 weight parts.
Example 8
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of example 1 in that the weight parts of white carbon black are different from those of the white carbon black, and the weight parts of the white carbon black EH-5 are adjusted to 20.
Example 9
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of example 1 in that the weight parts of white carbon black are different from those of the white carbon black, and the weight parts of the white carbon black EH-5 are adjusted to 10.
Example 10
A mixing process for bonding ethylene propylene diene monomer and a rope is different from example 1 in that a silane coupling agent is not added into a vulcanization system, and the vinyl triacetoxy silane is replaced by the same mass as that of the white carbon black EH-5.
Example 11
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of example 1 in that the silane coupling agent in a vulcanization system is different in type, and the vinyl triacetoxy silane is replaced by the silane coupling agent Si-69 with equal mass.
Example 12
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of example 1 in that a non-reactive alkyl phenolic resin is replaced by a gum rosin and other mass, and the type of tackifying resin is different from that of the non-reactive alkyl phenolic resin.
Example 13
The mixing process for bonding ethylene propylene diene monomer and cotton rope is different from that of the embodiment 1 in that the parts by weight of the raw materials are different from each other, and the specific parts by weight are as follows: the anti-aging agent comprises, by weight, 100 parts of ethylene propylene diene monomer, 1.5 parts of an anti-aging agent RD, 1.5 parts of an anti-aging agent MB, 10 parts of non-reactive alkyl phenolic resin, 760 parts of a methylene acceptor PN760, 30 parts of white carbon black, 3 parts of vinyl triacetoxy silane, 330 parts of carbon black N330, 550 parts of carbon black N, 10 parts of paraffin oil, 8 parts of a methylene donor RA-65, 5 parts of a vulcanization aid HVA-2 5 and diisopropyl peroxide.
Example 14
The mixing process for bonding ethylene propylene diene monomer and cotton rope is different from that of the embodiment 1 in that the parts by weight of the raw materials are different from each other, and the specific parts by weight are as follows: the anti-aging agent comprises, by weight, 100 parts of Ethylene Propylene Diene Monomer (EPDM), 5 parts of an anti-aging agent MB, 20 parts of a non-reactive alkyl phenolic resin, 760 parts of a methylene acceptor PN760, 20 parts of white carbon black, 2 parts of vinyl triacetoxy silane, 330 parts of carbon black N, 550 parts of carbon black N, 10 parts of paraffin oil, 8 parts of a methylene donor RA-65, 20 parts of a vulcanization aid HVA-2 and 20 parts of diisopropyl peroxide.
Example 15
The mixing process for bonding ethylene propylene diene monomer and a rope is different from that of the embodiment 1 in that the technological parameters in the first-stage mixing step and the second-stage mixing step are different, and the specific parameters are as follows:
and (3) mixing: adding ethylene propylene diene monomer into an internal mixer at 110 ℃, carrying out heat preservation and mixing for 60 seconds, and then adding an antioxidant RD, an antioxidant MB, non-reactive alkyl phenolic resin and a methylene acceptor PN760, carrying out heat preservation and mixing for 4 minutes; adding white carbon black EH-5, vinyl triacetoxy silane, carbon black N330, carbon black N550 and paraffin oil, carrying out heat preservation banburying for 8min, and then discharging rubber at 130 ℃ to obtain a section of rubber compound;
two-stage mixing: after passing the first section of rubber compound through a roller for 3 times, cooling to 25 ℃, then placing the first section of rubber compound into an internal mixer at 80 ℃ for banburying for 50 seconds, adding a methylene donor RA-65, a vulcanization aid HVA-2 and diisopropyl peroxide, carrying out heat preservation and mixing for 5 minutes, then discharging rubber at 80 ℃, placing left and right cutters in an open mill for 5 times, carrying out thin pass for 6 times, discharging tablets, and heating to 160 ℃ after placing for 8 hours, and vulcanizing for 30 minutes.
Comparative example
Comparative example 1
The mixing process for bonding ethylene propylene diene monomer and a rope is different from that of the embodiment 1 in the following steps:
mixing ethylene propylene diene monomer in an internal mixer at 140 ℃ for 60 seconds, and adding an antioxidant RD, an antioxidant MB, non-reactive alkyl phenolic resin, a methylene acceptor PN760, a methylene donor RA-65, a vulcanizing aid HVA-2 and diisopropyl peroxide, and mixing for 2 minutes; adding white carbon black, vinyl triacetoxy silane, carbon black N330, carbon black N550 and paraffin oil, banburying for 4min, discharging at 150 ℃, passing through a roller for 3 times, cutting into pieces for 6 times, discharging pieces, standing for 8h, heating to 160 ℃, and vulcanizing for 30min. .
Comparative example 2
The mixing process for bonding ethylene-propylene-diene monomer and a rope is different from that of the embodiment 1 in that the vulcanizing agent is added in a different sequence in one-stage mixing step, and the vulcanizing agent diisopropylbenzene peroxide is added into the ethylene-propylene-diene monomer along with the anti-aging agent RD, the anti-aging agent MB, the non-reactive alkyl phenolic resin and the methylene acceptor PN760.
Comparative example 3
A mixing process for bonding ethylene-propylene-diene monomer and a rope is different from that of the embodiment 1 in that the vulcanizing agents are added in different sequences in one mixing step, and the vulcanizing agents and the auxiliary vulcanizing agents are added into the ethylene-propylene-diene monomer along with an anti-aging agent RD, an anti-aging agent MB, non-reactive alkyl phenolic resin and a methylene acceptor PN760.
Comparative example 4
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of example 1 in that the banburying temperature in one-stage mixing step is 100 ℃.
Comparative example 5
A mixing process for bonding ethylene propylene diene monomer and a rope is different from that of example 1 in that the weight parts of white carbon black EH-5 are adjusted to 8.
Comparative example 6
A mixing process for bonding ethylene propylene diene monomer and a rope uses 4 parts of PN760, 5 parts of RA-65 and 21 parts of white carbon black to replace 30 parts of non-reactive alkyl phenolic resin.
Performance test
T10(s): the time of T10, i.e. scorch time, on the rubber vulcanization tester was recorded, with shorter times indicating easier scorch.
Adhesive strength (kN/m): testing was performed according to GB/T532-1997;
average peel strength (KN/m): testing according to GB/T2942-1991, and carrying out on a tensile machine, wherein the extraction rate is 500mm/min, and the testing temperature is 20+/-5 ℃;
coating ratio (%): the coating amount of the surface of the cord after being pulled out from the vulcanized rubber is visually inspected and evaluated within the range of 0-100%;
elongation at break (%): testing was performed according to GB/T1040-92.
Detection result
TABLE 2 Performance test data for examples 1-15 and comparative examples 1-6
In combination with example 1, comparative example 1 and tables 2 and figures 1-2, it can be seen that: comparative example 1 has the same composition as example 1, but the mixing method is different, so that the bonding strength between the ethylene-propylene-diene monomer and the rope is improved from 35.9KN/m to 52.2KN/m, and the bonding strength is increased by 45.4%; the average peel strength between the ethylene propylene diene monomer and the rope is improved from 34.9KN/m to 51.2KN/m, and the average peel strength is increased by 46.7 percent; the following is indicated: whether the cord is stripped or pulled out, the bonding performance between the cord and the ethylene propylene diene monomer is obviously improved.
The situation that the ethylene-propylene-diene monomer prepared by the mixing method of the embodiment 1 of the application covers the rope and the situation that the ethylene-propylene-diene monomer prepared by the mixing method of the comparative embodiment 1 covers the rope are shown in the attached drawings, the situation that burrs are obviously arranged around the rope in the left image (embodiment 1) can be obviously seen from the attached drawings, the surface is uneven, the attachment rate of the burrs in the length direction of the rope reaches 100%, and the adhesive coverage rate can be considered to reach 100%; the periphery of the rope in the right graph (comparative example 1) is smoother, and the burr is less, namely, the coating rate is considered to be 20%.
It can be seen from a combination of example 1 and comparative examples 2-3 and Table 2: both the vulcanizing agent and the auxiliary vulcanizing agent are added into one-stage mixing step, and T10 is only about 34 seconds, so that scorching phenomenon can occur in actual production, and rubber is aged, so that one-stage mixing cannot be carried out.
As can be seen in combination with example 1 and comparative example 4, table 2: the banburying temperature has a great influence on the bonding performance of the ethylene-propylene-diene monomer, and when the banburying temperature is lower than 110 ℃, the dispersion of each auxiliary agent in the ethylene-propylene-diene monomer is insufficient, so that the bonding performance between the ethylene-propylene-diene monomer and the cotton rope is reduced.
As can be seen in combination with example 1 and comparative example 5, table 2: the mixing amount of the white carbon black has larger influence on the adhesive property of the ethylene-propylene-diene monomer, when the white carbon black is less than 10 parts, the adhesive property of the ethylene-propylene-diene monomer is obviously reduced, the adhesive strength between the ethylene-propylene-diene monomer and a rope is reduced to 36.2KN/m, the average peel strength is reduced to 35.9KN/m, and the adhesive coating rate is only 36%.
As can be seen in combination with example 1 and comparative example 6 and table 2: in comparative example 6, without addition of tackifying resin, the adhesive strength between the ethylene propylene diene monomer and the cord was reduced to 40.5KN/m, the average peel strength was reduced to 39.8KN/m, and the coating rate was only 77%, indicating that: the adhesion performance between the ethylene-propylene-diene monomer and the thread rope is obviously reduced without using tackifying resin, so that the methylene acceptor, the methylene donor and the tackifying resin are compounded for use, and the ethylene-propylene-diene monomer has a synergistic effect in improving the self-adhesion performance of the ethylene-propylene-diene monomer.
It can be seen in combination with examples 1-2 and with Table 2: in example 2, trimethylolpropane trimethacrylate is used as a vulcanization aid, the bonding strength and the average peeling strength between the ethylene propylene diene monomer and the rope prepared in example 2 are not the same as those of example 1, and the coating rate of example 1 is higher than that of example 2; the following is indicated: the maleic amide-type co-vulcanizing agent and the peroxide vulcanizing agent are matched, so that the adhesive strength and the adhesive coating rate of the ethylene propylene diene monomer are improved, and a synergistic effect is achieved.
It can be seen in combination with examples 1, 3-7 and with Table 2: the combination of the methylene acceptor and the methylene donor is optimally PN760 and RA-65, and the bonding strength and the average peeling strength between the ethylene propylene diene monomer and the rope after the combination of the PN760 and the RA-65 are better; and the weight ratio of PN760 to RA-65 has a greater effect on the adhesive properties of the ethylene propylene diene monomer, and when PN760 is less, the adhesive properties of the ethylene propylene diene monomer are reduced.
As can be seen by combining examples 1, 10-11 and Table 2, the improvement effect of the vinyl silane coupling agent on the ethylene-propylene-diene monomer vulcanizing system is better than that of the traditional silane coupling agent Si-69, and the bonding strength, average peeling strength and coating rate between the ethylene-propylene-diene monomer and the rope are all optimal in example 1 by using the vinyl triacetoxy silane.
As can be seen from the combination of examples 1 and 12 and the combination of table 2, the non-reactive alkylphenol resin has better adhesion promotion effect, and can obviously improve the adhesive property and the adhesive coating rate of the ethylene propylene diene monomer (ethylene propylene diene monomer) compared with other tackifying resins.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (7)
1. The mixing process for bonding the ethylene propylene diene monomer and the cotton rope is characterized by comprising the following steps of:
and (3) mixing: after the ethylene propylene diene monomer is mixed, adding an anti-aging agent, tackifying resin and methylene acceptor into the ethylene propylene diene monomer, and mixing for 2-4 min at 110-140 ℃; adding white carbon black, vinyl silane coupling agent, reinforcing system and paraffin oil, carrying out heat preservation banburying for 4-8 min, and discharging rubber at 130-150 ℃ to obtain a section of rubber compound; the reinforcing system is one or more of carbon black N330 and carbon black N550;
two-stage mixing: the first section of rubber compound is banburying for 20s to 50s at 80 ℃ to 100 ℃ after being cooled by a roller, then methylene donor, auxiliary vulcanizing agent and vulcanizing agent are added for heat preservation and mixing for 2 to 5min, then rubber discharging is carried out at 80 ℃ to 100 ℃, and finally vulcanization is carried out after cutting knife, thin pass and sheet discharging; the tackifying resin is non-reactive alkyl phenolic resin;
the additive comprises, by 100 parts of ethylene propylene diene monomer, 5-20 parts of vulcanizing agent, 5-20 parts of auxiliary vulcanizing agent, 5-14 parts of methylene acceptor and methylene donor, 10-30 parts of white carbon black, 10-30 parts of non-reactive alkyl phenolic resin, 30-60 parts of reinforcing system and 3-10 parts of antioxidant;
the weight ratio of the vinyl silane coupling agent to the white carbon black is 1:10.
2. The process for mixing ethylene propylene diene monomer and cord adhesion according to claim 1, wherein: the vulcanizing agent is any one of diisopropyl benzene peroxide, 1, 3-bis (tert-butylperoxy diisopropyl) benzene and 2, 5-dimethyl-2, 5- (di-tert-butylperoxy) hexane.
3. The process for mixing ethylene propylene diene monomer and cord adhesion according to claim 2, wherein: the auxiliary vulcanizing agent is N, N' -m-phenylene bismaleimide.
4. The process for mixing ethylene propylene diene monomer and cord adhesion according to claim 1, wherein: the methylene acceptor is any one of RE, RS, R-80 and PN760, and the methylene donor is any one of RA and HMMM.
5. The process for mixing ethylene propylene diene monomer and cord adhesion according to claim 4, wherein: the methylene acceptor selects PN760, the methylene donor selects RA, and the weight ratio of PN760 to RA is (3-8): 2-6.
6. The process for mixing ethylene-propylene-diene monomer and rope adhesion according to claim 1, wherein the reinforcing system is formed by compounding carbon black N330 and carbon black N550 according to a weight ratio of 1:1.
7. The process of claim 1, wherein the anti-aging agent is one or more of RD, MB, BLE.
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| CN202111681359.6A CN114316449B (en) | 2021-12-31 | 2021-12-31 | Mixing process for bonding ethylene propylene diene monomer and cotton rope |
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| CN202111681359.6A CN114316449B (en) | 2021-12-31 | 2021-12-31 | Mixing process for bonding ethylene propylene diene monomer and cotton rope |
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| CN114316449B true CN114316449B (en) | 2023-06-20 |
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| JP4614293B2 (en) * | 1998-12-04 | 2011-01-19 | 株式会社ブリヂストン | Heat resistant conveyor belt |
| CN102775688A (en) * | 2012-08-09 | 2012-11-14 | 无锡宝通带业股份有限公司 | High temperature resistant core glue for conveyer belt and preparation method thereof |
| CN103102598A (en) * | 2013-02-04 | 2013-05-15 | 无锡宝通带业股份有限公司 | High-temperature resistant steel wire rope core conveying belt core glue and preparation method thereof |
| CN103242777B (en) * | 2013-04-28 | 2015-06-17 | 北京化工大学 | Bonding layer rubber material for high-temperature resistant aramid fiber canvas core conveyer belt, and using method of bonding layer rubber material |
| CN103435874A (en) * | 2013-09-03 | 2013-12-11 | 无锡宝通带业股份有限公司 | Pure styrene-butadiene rubber steel wire rope core conveying belt core rubber and preparation method thereof |
| CN103772827A (en) * | 2013-12-31 | 2014-05-07 | 无锡宝通带业股份有限公司 | Core rubber for high temperature resistance steel mesh elevator belt and preparation method of core rubber |
| JP2016183262A (en) * | 2015-03-26 | 2016-10-20 | 横浜ゴム株式会社 | Rubber composition for steel cord coating |
| CN105086880B (en) * | 2015-08-25 | 2017-01-18 | 无锡宝通科技股份有限公司 | Rubber cement for aramid fiber heat-resistant conveyer belt joint and preparation method thereof |
| CN108659744B (en) * | 2018-06-04 | 2021-02-02 | 南京利德东方橡塑科技有限公司 | Environment-friendly EPDM adhesive for improving adhesion between ethylene propylene diene monomer and cord thread |
| CN111704771B (en) * | 2020-06-10 | 2023-08-29 | 浙江保尔力橡塑股份有限公司 | Formula and preparation method of ethylene propylene rubber buffer rubber with good adhesive property |
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