CN115873409A - Flexible rubber roller sleeve for charging roller, preparation process of flexible rubber roller sleeve and charging roller - Google Patents
Flexible rubber roller sleeve for charging roller, preparation process of flexible rubber roller sleeve and charging roller Download PDFInfo
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- CN115873409A CN115873409A CN202211734437.9A CN202211734437A CN115873409A CN 115873409 A CN115873409 A CN 115873409A CN 202211734437 A CN202211734437 A CN 202211734437A CN 115873409 A CN115873409 A CN 115873409A
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- carbon black
- flexible rubber
- modified
- white carbon
- rubber roller
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 117
- 239000005060 rubber Substances 0.000 title claims abstract description 117
- 238000002360 preparation method Methods 0.000 title claims abstract description 69
- 239000006229 carbon black Substances 0.000 claims abstract description 152
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical class O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 89
- 150000001721 carbon Chemical class 0.000 claims abstract description 40
- 238000002156 mixing Methods 0.000 claims abstract description 35
- 239000012744 reinforcing agent Substances 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 229920001021 polysulfide Polymers 0.000 claims abstract description 30
- 239000005077 polysulfide Substances 0.000 claims abstract description 30
- 150000008117 polysulfides Polymers 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 30
- CMLFRMDBDNHMRA-UHFFFAOYSA-N 2h-1,2-benzoxazine Chemical compound C1=CC=C2C=CNOC2=C1 CMLFRMDBDNHMRA-UHFFFAOYSA-N 0.000 claims abstract description 27
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 claims abstract description 14
- 229960003656 ricinoleic acid Drugs 0.000 claims abstract description 14
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 8
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 24
- 239000003607 modifier Substances 0.000 claims description 23
- 229920000459 Nitrile rubber Polymers 0.000 claims description 16
- VTHOKNTVYKTUPI-UHFFFAOYSA-N triethoxy-[3-(3-triethoxysilylpropyltetrasulfanyl)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCSSSSCCC[Si](OCC)(OCC)OCC VTHOKNTVYKTUPI-UHFFFAOYSA-N 0.000 claims description 16
- 239000002202 Polyethylene glycol Substances 0.000 claims description 15
- 229920001223 polyethylene glycol Polymers 0.000 claims description 15
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 claims description 12
- 239000004088 foaming agent Substances 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000006258 conductive agent Substances 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 4
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 3
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 238000004073 vulcanization Methods 0.000 description 11
- 239000002699 waste material Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 10
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- 238000004132 cross linking Methods 0.000 description 6
- 238000011049 filling Methods 0.000 description 6
- 238000003801 milling Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 238000009740 moulding (composite fabrication) Methods 0.000 description 4
- 230000004913 activation Effects 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
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- 230000002708 enhancing effect Effects 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 241000872198 Serjania polyphylla Species 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 239000004156 Azodicarbonamide Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical group OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical group [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical group 0.000 description 1
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- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical group NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 1
- 235000019399 azodicarbonamide Nutrition 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
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- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000007151 ring opening polymerisation reaction Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
Abstract
The invention relates to a charging roller, in particular to a flexible rubber roller sleeve for the charging roller, a preparation process thereof and the charging roller, which mainly comprise the following raw materials in parts by mass: 90-105 parts of polysulfide rubber, 20-35 parts of benzoxazine resin and 5-10 parts of reinforcing agent; the reinforcing agent consists of modified carbon black and modified white carbon black; the preparation method of the modified carbon black comprises the following steps: mixing ricinoleic acid, dicumyl peroxide and acetone together to prepare a modified liquid, uniformly mixing the modified liquid and carbon black, drying at 25-25 ℃, and then placing in a nitrogen environment to heat for 2-3h at the heating temperature of 130-150 ℃ to obtain the carbon black modified liquid. This application has the advantage that improves the intensity of flexible rubber roller shell.
Description
Technical Field
The invention relates to the field of charging rollers, in particular to a flexible rubber roller sleeve for a charging roller, a preparation process of the flexible rubber roller sleeve and the charging roller.
Background
In daily life, image forming apparatuses using an electrophotographic system, such as copiers, facsimile machines, or printers, require various roller members, such as a charging roller, inside the apparatuses, which is a novel environment-friendly charging method that can reduce the generation of ozone and can be charged uniformly without noise; the roller that charges comprises the metal axle at center and the roller shell of periphery jointly usually, and the roller shell is made by rubber material or resin material usually, and the roller shell that charges is outlying rubber or resin roller shell and is leading to the harm because of receiving external environment's erosion, and this can influence the electric charge of the roller that charges, changes the size of the resistance of the roller that charges for the photoconductor drum receives the electricity inhomogeneous, and then makes and print the problem.
In the above-described related art, the inventors consider that: the roller sleeve of the existing charging roller is usually made of flexible rubber, but the strength of the flexible rubber roller sleeve prepared in the prior art is insufficient, and the roller sleeve is easy to wear in the long-term use process, so that the use of the charging roller is influenced.
Disclosure of Invention
In order to improve the strength of the flexible rubber roller sleeve, the application provides the flexible rubber roller sleeve for the charging roller, the preparation process of the flexible rubber roller sleeve and the charging roller.
In a first aspect, the application provides a flexible rubber roller sleeve for a charging roller, which adopts the following technical scheme:
a flexible rubber roller sleeve for a charging roller mainly comprises the following components in parts by mass: 90-105 parts of polysulfide rubber, 20-35 parts of benzoxazine resin, 5-10 parts of reinforcing agent, 2-3 parts of vulcanizing agent, 2-3 parts of foaming agent and 1-2 parts of conductive agent; the reinforcing agent comprises modified carbon black and white carbon black; the preparation method of the modified carbon black comprises the following steps:
1): mixing ricinoleic acid, dicumyl peroxide and acetone to prepare a modified solution; the mass ratio of the ricinoleic acid to the dicumyl peroxide is (5-6) to (1-2);
2): mixing the modified liquid prepared in the step 1) with carbon black, drying at 25-35 ℃, and then placing in a nitrogen environment to heat for 2-3 hours at the heating temperature of 130-150 ℃ to obtain the carbon black; the mass ratio of the ricinoleic acid to the carbon black is (1-3) to (9-10).
By adopting the technical scheme, the polysulfide rubber is synthetic rubber formed by polycondensation of dihalogenated alkane and polysulfide of alkali metal or alkaline earth metal, the molecular main chain of the polysulfide rubber is composed of single bonds, and each bond can rotate in the inner direction, so that the polysulfide rubber has higher flexibility and is beneficial to the movement or swing of the molecules or chain segments; the benzoxazine resin has the heat resistance and the flame retardance of common phenolic resin, no micromolecule is released in the forming and curing process of the resin, and the prepared finished product has small shrinkage and few cracks; but the benzoxazine resin has low crosslinking density, brittle property and poor toughness; the polysulfide rubber and the benzoxazine resin are mixed and reacted, the sulfydryl in the polysulfide rubber can react with the active group in the benzoxazine resin, and the compound formed by the reaction has lower shrinkage, fewer cracks and good toughness;
modified carbon black and white carbon black are added as reinforcing agents, the carbon black has good reinforcing effect while having good conductivity, but the surfaces of carbon black particles contain oxygen-containing groups such as carboxyl, phenol, acid anhydride, lactone and the like, the groups determine that the surface activity of the carbon black is very large, the self-polymerization among the particles is large, and the particles are easy to agglomerate and are difficult to disperse; the surface of the carbon black is coated and modified through ricinoleic acid, the self-polymerization degree of the carbon black is reduced, the dispersity of the modified carbon black in the flexible rubber roller sleeve is improved, the reinforcing effect of the modified carbon black on the flexible rubber roller sleeve is further improved, and the prepared flexible rubber roller sleeve has better strength and toughness by matching with white carbon black.
Optionally, the mass ratio of the modified carbon black to the white carbon black is (2-4) to (1-3).
By adopting the technical scheme, the elasticity and the wear resistance of the flexible rubber roller sleeve can be improved by filling the white carbon black into the flexible rubber roller sleeve, the hardness and the thermal stability of the flexible rubber roller sleeve can also be improved, but the strength of the white carbon black is poorer than that of the carbon black; after the carbon black is modified by the ricinoleic acid, the prepared modified carbon black has better affinity with polysulfide rubber and benzoxazine resin, better reinforcing effect than white carbon black and higher wear resistance, but the modified carbon black has higher rolling resistance than the white carbon black; by adjusting the mass ratio of the modified carbon black to the white carbon black, the problem of low strength of the white carbon black is solved, and the problem of high rolling resistance of the modified carbon black is also solved, so that the prepared flexible rubber roller sleeve has better strength.
Optionally, the white carbon black is modified before use to prepare modified white carbon black, and the preparation method of the modified white carbon black comprises the following steps: mixing white carbon black and a modifier, heating at 120-150 ℃, and cooling to obtain the product; the modifier consists of at least one of polyethylene glycol and gamma-aminopropyltriethoxysilane and bis- (gamma-triethoxysilylpropyl) -tetrasulfide according to the mass ratio of (2-4) to (3-4).
By adopting the technical scheme, unsaturated bonds and hydroxyl groups exist on the surface of the white carbon black, so that a large amount of vulcanizing agent can be adsorbed, and the subsequent vulcanization rate of the polysulfide rubber is reduced; the modifier is used for modifying the white carbon black, the aggregation of the white carbon black can be reduced by the bis- (gamma-triethoxysilylpropyl) -tetrasulfide, so that the dispersibility of the white carbon black in the polysulfide rubber is better, and meanwhile, the sulfur content in the system can be improved by the bis- (gamma-triethoxysilylpropyl) -tetrasulfide, so that the network crosslinking density formed by the polysulfide rubber and the benzoxazine resin in the subsequent vulcanization process is improved, and the strength of the flexible rubber roller sleeve is improved; the polyethylene glycol can play a role in enhancing the activation energy of the reaction in the reaction, and the effect of delaying the vulcanization of the white carbon black is reduced; the gamma-aminopropyl triethoxysilane serving as a silane coupling agent can effectively weaken the agglomeration of the white carbon black, reduce the internal loss caused by friction between the white carbon black and improve the filling and reinforcing effect of the white carbon black on the flexible rubber roller sleeve; at least one of polyethylene glycol and gamma-aminopropyltriethoxysilane is matched with bis- (gamma-triethoxysilylpropyl) -tetrasulfide, so that the modified white carbon black has a better dispersion effect in the flexible rubber roller sleeve, and the subsequent vulcanization rate of the polysulfide rubber and the benzoxazine resin is improved.
Optionally, the modifier consists of polyethylene glycol, gamma-aminopropyltriethoxysilane and bis- (gamma-triethoxysilylpropyl) -tetrasulfide according to the mass ratio of (1-2) to (3-4).
By adopting the technical scheme, one end of the gamma-aminopropyltriethoxysilane and one end of the bis- (gamma-triethoxysilylpropyl) -tetrasulfide can react with hydroxyl on the surface of the white carbon black through hydrolysis, and the other end of the gamma-aminopropyltriethoxysilane can be chemically crosslinked with macromolecular chains in the polysulfide rubber and the benzoxazine resin during vulcanization; one end of polyethylene glycol reacts with hydroxyl on the surface of white carbon black, and the organic group at the other end physically crosslinks with macromolecular chains in polysulfide rubber and benzoxazine resin, so that the polyethylene glycol stably plays a role in enhancing the reaction activation energy; the polyethylene glycol, the gamma-aminopropyltriethoxysilane and the bis- (gamma-triethoxysilylpropyl) -tetrasulfide are compounded, so that the compactness of a network crosslinking structure in the prepared flexible rubber roller sleeve is improved, the filling effect of the white carbon black on the flexible rubber roller sleeve is improved, the delayed vulcanization effect of the modified white carbon black on rubber is reduced, and the prepared flexible rubber roller sleeve has better strength.
Optionally, the mass ratio of the white carbon black to the modifier in the modified white carbon black is (8-10) to (2-3).
By adopting the technical scheme, the mass ratio between the modifier and the white carbon black is adjusted, the filling effect of the white carbon black on the flexible rubber roller sleeve can be improved by adding the modifier, and the crosslinking density in the flexible rubber roller sleeve is improved, but when the usage amount of the modifier is too much, the crosslinking density of the flexible rubber roller sleeve is too large, the elongation at break of the prepared flexible rubber roller sleeve is reduced, the flexibility of the flexible rubber roller sleeve is reduced, and the use of the flexible rubber roller sleeve is influenced.
In a second aspect, the application provides a preparation process of a flexible rubber roller sleeve for a charging roller, which comprises the following steps:
a preparation process of a flexible rubber roller sleeve for a charging roller comprises the following steps:
s1: putting the polysulfide rubber and the benzoxazine resin into an internal mixer together to prepare an internal mixing material;
s2: and (2) mixing the banburying material prepared in the step (S1) with a vulcanizing agent, a foaming agent, a reinforcing agent and a conductive agent, rolling, and pressing for forming to obtain the conductive adhesive.
Through adopting above-mentioned technical scheme, put polysulfide rubber, benzoxazine resin into the banbury mixer earlier and carry out the banburying, the banburying material quality that prepares is homogeneous, then mix the banburying material with vulcanizer, foamer, reinforcing agent and conducting agent and mill, the in-process of mixing mill, the vulcanizer vulcanizes the banburying material, the foamer produces the foaming effect simultaneously, make the bubble evenly distributed who generates in the fused material in the banbury mixer, and the electrically conductive effect of filling reinforcing effect and conducting agent through the reinforcing agent, make the flexible rubber roller shell for the charge roller who prepares have good toughness and intensity, also have good electric conductivity simultaneously, improve the performance of the charge roller of follow-up preparation.
Optionally, in step S2, after the reinforcing agent is added, before mixing and open mixing, liquid nitrile rubber with amino end capping is added; the mass ratio of the amino-terminated liquid nitrile rubber to the benzoxazine resin is (0.5-2) to (9-11).
By adopting the technical scheme, because both ends of the amino-terminated liquid nitrile rubber contain amino, the amino has the function of promoting ring-opening polymerization of benzoxazine resin; meanwhile, the liquid nitrile rubber with the end capped by the amino group can generate self-polymerization reaction at high temperature, so that the viscosity of a mixture prepared in mixing and open milling is increased, gas generated by heating a foaming agent can be uniformly distributed in the mixture, the mixture has enough surface tension to support the formation of bubbles, and the prepared rubber roller sleeve has good elasticity and toughness; however, the excessive addition of the amino-terminated liquid nitrile rubber easily causes the viscosity of the prepared mixture to be too high in the mixing and open mixing process, and bubbles generated by the foaming agent are limited, so that the elasticity and the strength of the prepared flexible rubber roller sleeve are influenced.
Optionally, in step S2, after the amino-terminated nitrile rubber is added, diphenylguanidine is added before mixing and open milling; the addition amount of the diphenyl guanidine is 2-5 parts.
By adopting the technical scheme, the diphenyl guanidine can play a role in promoting the vulcanization rate of the polysulfide rubber, and the diphenyl guanidine can adsorb a large amount of modified white carbon black at the same time, so that the polarity of the surface of the modified white carbon black is reduced, the affinity of the modified white carbon black with a polysulfide rubber substrate is increased, the agglomeration effect of the modified white carbon black is further reduced, the dispersion performance of the modified white carbon black in the flexible rubber roller sleeve is further improved, and the prepared flexible rubber roller sleeve has better elasticity and strength.
In a third aspect, the present application provides a charging roller:
the charging roller comprises a roller core and a flexible rubber roller sleeve wrapped outside the roller core, wherein the flexible rubber roller sleeve is prepared by the preparation process of the flexible rubber roller sleeve for the charging roller.
Through adopting above-mentioned technical scheme, at the outside parcel of roller core flexible rubber roller shell for the roller that charges, because the flexible rubber roller shell for the roller that charges who prepares has good toughness and intensity, can protect the roller core, prolong the life of the roller that charges.
In summary, the present application has the following beneficial effects:
by blending and polymerizing the polysulfide rubber and the benzoxazine resin, the benzoxazine resin has low porosity and small shrinkage rate, and the polysulfide rubber has good toughness, so that a product generated after combination contains fewer cracks and also has good toughness, and the surface of carbon black is modified by ricinoleic acid, so that the self-polymerization degree of the carbon black is reduced, the dispersibility of the carbon black is improved, and the prepared flexible rubber roller sleeve has better strength and toughness.
Detailed Description
The present application will be described in further detail with reference to examples;
the raw materials of the examples and comparative examples of the present application are generally commercially available unless otherwise specified.
Preparation example
Modified carbon Black preparation example 1
The preparation method of the modified carbon black in the preparation example comprises the following steps:
1) Taking a stirring barrel, placing acetone in the stirring barrel, placing ricinoleic acid and dicumyl peroxide in the stirring barrel according to the mass ratio of 5.5; the mass ratio of acetone to dicumyl peroxide is 6;
2) Uniformly mixing the modified liquid prepared in the step 1) with carbon black, drying at 30 ℃, and then placing in a sealed nitrogen environment for heating for 2.5 hours at the heating temperature of 140 ℃ to obtain the carbon black; the mass ratio of the ricinoleic acid to the carbon black used was 1.
Modified carbon Black preparation example 2
The preparation method of the modified carbon black in the present preparation example is different from that in preparation example 1 of the modified carbon black in that the mass ratio of ricinoleic acid to carbon black used in step 2) is 3.
Preparation example 3 of modified carbon Black
The preparation method of the modified carbon black in the present preparation example is different from that in preparation example 1 of the modified carbon black in that the mass ratio of ricinoleic acid used in step 2) to carbon black is 2.
Modified white carbon Black preparation example 1
The preparation method of the modified white carbon black in the preparation example comprises the following steps:
taking a mixing barrel, putting the white carbon black and the modifier into the mixing barrel together, adding ethanol into the mixing barrel as a solvent, and uniformly mixing to obtain a mixture, wherein the mass ratio of the modifier to the ethanol is 1; then placing the mixture at 140 ℃ for heating for 15min, cooling and drying to obtain the product; the modifier consists of polyethylene glycol and bis- (gamma-triethoxysilylpropyl) -tetrasulfide according to a mass ratio of 2; the mass ratio of the white carbon black to the modifier is 8.
Preparation example 2 of modified white carbon
The preparation method of the modified white carbon black preparation example in the preparation example is different from that of the modified white carbon black preparation example 1 in that the used modifier consists of polyethylene glycol and bis- (gamma-triethoxysilylpropyl) -tetrasulfide according to a mass ratio of 4.
Modified white carbon Black preparation example 3
The preparation method of the modified white carbon black preparation example in the preparation example is different from that of the modified white carbon black preparation example 1 in that the used modifier consists of polyethylene glycol and bis- (gamma-triethoxysilylpropyl) -tetrasulfide according to a mass ratio of 3.5.
Preparation example 4 of modified white carbon
The preparation method of the modified white carbon black preparation example in the preparation example is different from that of the modified white carbon black preparation example 3 in that the modifier consists of gamma-aminopropyltriethoxysilane and bis- (gamma-triethoxysilylpropyl) -tetrasulfide in a mass ratio of 3.5.
Modified white carbon Black preparation example 5
The preparation method of the modified white carbon black preparation example in the preparation example is different from that of the modified white carbon black preparation example 3 in that the used modifier consists of polyethylene glycol, gamma-aminopropyltriethoxysilane and bis- (gamma-triethoxysilylpropyl) -tetrasulfide according to a mass ratio of 1.5.
Modified white carbon Black preparation example 6
The preparation method of the modified white carbon black preparation example in the preparation example is different from that of the modified white carbon black preparation example 5 in that the mass ratio of the used white carbon black to the modifier is 10.
Modified white carbon Black preparation example 7
The preparation method of the modified white carbon black preparation example in the preparation example is different from that of the modified white carbon black preparation example 5 in that the mass ratio of the used white carbon black to the modifier is 9.
Examples
Example 1
The flexible rubber roller sleeve for the charging roller in the embodiment mainly comprises the following raw materials in parts by weight: 90kg of polysulfide rubber, 20kg of benzoxazine resin, 5kg of reinforcing agent, 2kg of vulcanizing agent, 2kg of foaming agent and 1kg of conductive agent; the reinforcing agent consists of modified carbon black and white carbon black according to the mass ratio of 2; the vulcanizing agent is sulfur, and the foaming agent is azodicarbonamide; the modified carbon black used was prepared from modified carbon black preparation example 1; the conductive agent is silver powder;
the preparation process of the flexible rubber roller sleeve for the charging roller in the embodiment comprises the following steps:
s1: putting the polysulfide rubber and the benzoxazine resin in parts by weight into an internal mixer together, and carrying out internal mixing for 15min at 160 ℃ to prepare an internal mixed material;
s2: and (2) mixing the internal mixing material prepared in the step (S1) with the vulcanizing agent, the foaming agent, the reinforcing agent and the conductive agent in parts by weight, putting the mixture into an open mill for milling, and cooling, pressing and forming to obtain the conductive rubber.
Example 2
The manufacturing process of the flexible rubber roller shell for the charging roller of the embodiment is different from that of the embodiment 1 in that 105kg of polysulfide rubber, 35kg of benzoxazine resin, 10kg of reinforcing agent, 3kg of vulcanizing agent, 3kg of foaming agent and 2kg of conductive agent are used.
Example 3
The manufacturing process of the flexible rubber roller sleeve for the charging roller of the embodiment is different from that of the embodiment 1 in that 100kg of polysulfide rubber, 30kg of benzoxazine resin, 7kg of reinforcing agent, 2.5kg of vulcanizing agent, 2.5kg of foaming agent and 1.5kg of conductive agent are used.
Example 4
The preparation process of the flexible rubber roller sleeve for the charging roller in the embodiment is different from that in the embodiment 3 in that the reinforcing agent used in the step S2 consists of modified carbon black and white carbon black according to a mass ratio of 4.
Example 5
The preparation process of the flexible rubber roller sleeve for the charging roller in the embodiment is different from that in the embodiment 3 in that the reinforcing agent used in the step S2 consists of modified carbon black and white carbon black according to a mass ratio of 3.
Example 6
The process for producing the flexible rubber sleeve for a charging roller of the present example was different from that in example 5 in that the modified carbon black used in step S2 was obtained in modified carbon black production example 2.
Example 7
The process for producing the flexible rubber sleeve for a charging roller according to the present example was different from that in example 5 in that the modified carbon black used in step S2 was produced from modified carbon black production example 3.
Example 8
The difference between the method for recovering chlorobenzene waste liquid in this embodiment and embodiment 7 is that the reinforcing agent used in step S2 is composed of modified carbon black and modified white carbon black according to a mass ratio of 3.
Example 9
The difference between the method for recovering chlorobenzene waste liquid in this embodiment and embodiment 7 is that the reinforcing agent used in step S2 is composed of modified carbon black and modified white carbon black according to a mass ratio of 3.
Example 10
The difference between the method for recovering chlorobenzene waste liquid in this embodiment and embodiment 7 is that the reinforcing agent used in step S2 is composed of modified carbon black and modified white carbon black according to a mass ratio of 3.
Example 11
The difference between the method for recovering chlorobenzene waste liquid in this embodiment and embodiment 7 is that the reinforcing agent used in step S2 is composed of modified carbon black and modified white carbon black according to a mass ratio of 3.
Example 12
The difference between the method for recovering chlorobenzene waste liquid in this embodiment and embodiment 7 is that the reinforcing agent used in step S2 is composed of modified carbon black and modified white carbon black according to a mass ratio of 3.
Example 13
The difference between the method for recovering chlorobenzene waste liquid in this embodiment and embodiment 7 is that the reinforcing agent used in step S2 is composed of modified carbon black and modified white carbon black according to a mass ratio of 3.
Example 14
The difference between the method for recovering chlorobenzene waste liquid in this embodiment and embodiment 7 is that the reinforcing agent used in step S2 is composed of modified carbon black and modified white carbon black according to a mass ratio of 3.
Example 15
The difference between the method for recovering chlorobenzene waste liquid in this example and that in example 14 is that, after the internal mix is mixed with the vulcanizing agent, the foaming agent, the reinforcing agent and the conductive agent in step S2, the amino-terminated liquid nitrile rubber is further added, and the mass ratio of the amino-terminated liquid nitrile rubber to the benzoxazine resin is 1.
Example 16
The method for recovering chlorobenzene waste liquid in this example is different from that in example 15 in that 2kg of diphenylguanidine was added after the amino-terminated liquid nitrile rubber was added in step S2 and before the mixing and open milling.
Example 17
The difference between the method for recovering chlorobenzene waste liquid in this example and that in example 15 is that 5kg of diphenylguanidine was added after the amino-terminated nitrile rubber was added in step S2 and before the mixing and open-milling.
Example 18
The method for recovering chlorobenzene waste liquid in this example is different from that in example 15 in that 3kg of diphenylguanidine was added after the amino-terminated liquid nitrile rubber was added in step S2 and before the mixing and open milling.
Comparative example
Comparative example 1
The preparation process of the flexible rubber roller sleeve for the charging roller in the comparative example is different from that in example 1 in that the used reinforcing agent consists of carbon black and white carbon black according to a mass ratio of 2.
Comparative example 2
The process for producing the flexible rubber sleeve for a charge roller of this comparative example differs from that of example 1 in that the reinforcing agent used is carbon black.
Comparative example 3
The preparation process of the flexible rubber roller sleeve for the charging roller in the comparative example is different from that in example 1 in that the used reinforcing agent is white carbon black.
Detection method
Respectively preparing flexible rubber roller sleeves according to the preparation processes of the flexible rubber roller sleeves for the charging rollers in the examples 1 to 18 and the comparative examples 1 to 3, taking the flexible rubber roller sleeves with the same size as a test sample, testing the tensile strength of the test sample according to the method of GB/T528-2009, and recording data to obtain table 1;
TABLE 1 tensile Strength of Flexible rubber roller covers for Charge rollers in examples 1-18 and comparative examples 1-3
As can be seen by combining examples 1 to 7, comparative examples 1 to 3 and table 1, by adding a reinforcing agent in the process for preparing the flexible rubber roller sleeve for the charging roller, when the reinforcing agent consists of modified carbon black and white carbon black according to a mass ratio of 3;
as can be seen by combining examples 8-14 and table 1, by modifying the white carbon black, when the modifier consists of polyethylene glycol, γ -aminopropyltriethoxysilane, and bis- (γ -triethoxysilylpropyl) -tetrasulfide in a mass ratio of 1.5; the bis- (gamma-triethoxysilylpropyl) -tetrasulfide can improve the network crosslinking density of the prepared flexible rubber roller sleeve in the subsequent vulcanization process of the polysulfide rubber and the benzoxazine resin; the polyethylene glycol can play a role in enhancing reaction activation energy in the reaction, and the effect of delaying vulcanization of the white carbon black on the polysulfide rubber and the benzoxazine resin is reduced; the modified white carbon black has better filling and reinforcing effects on the flexible rubber roller sleeve for the charging roller by matching with the dispersion effect of the gamma-aminopropyltriethoxysilane on the white carbon black, and the flexible rubber roller sleeve has better vulcanization rate in the preparation process;
as can be seen by combining examples 15 to 18 and table 1, diphenyl guanidine is added in the preparation process of the flexible rubber roller sleeve for the charging roller, and the addition amount of diphenyl guanidine is adjusted, so that diphenyl guanidine can adsorb a large amount of modified white carbon black, the polarity of the surface of the modified white carbon black is reduced, the affinity of the modified white carbon black with the rubber substrate is increased, and the subsequent vulcanization of the polysulfide rubber is promoted; meanwhile, the amino-terminated liquid nitrile rubber is added, the amino-terminated liquid nitrile rubber generates self-polymerization reaction at high temperature, the viscosity of the mixture is increased, the foaming process of the flexible rubber roller sleeve is promoted, the toughness and the strength of the prepared flexible rubber roller sleeve are enhanced, and the flexible rubber roller sleeve has better tensile strength.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The utility model provides a flexible rubber roller shell for roller charges which characterized in that: the adhesive mainly comprises the following components in parts by mass: 90-105 parts of polysulfide rubber, 20-35 parts of benzoxazine resin, 5-10 parts of reinforcing agent, 2-3 parts of vulcanizing agent, 2-3 parts of foaming agent and 1-2 parts of conductive agent; the reinforcing agent comprises modified carbon black and white carbon black; the preparation method of the modified carbon black comprises the following steps:
1): mixing ricinoleic acid, dicumyl peroxide and acetone to prepare a modified solution; the mass ratio of the ricinoleic acid to the dicumyl peroxide is (5-6) to (1-2);
2): mixing the modified liquid prepared in the step 1) with carbon black, drying at 25-35 ℃, and then placing in a nitrogen environment to heat for 2-3 hours at the heating temperature of 130-150 ℃ to obtain the carbon black; the mass ratio of the ricinoleic acid to the carbon black is (1-3) to (9-10).
2. The flexible rubber roller shell for a charging roller according to claim 1, characterized in that: the mass ratio of the modified carbon black to the white carbon black is (2-4) to (1-3).
3. The flexible rubber roller shell for a charging roller according to claim 2, characterized in that: the white carbon black is modified before use to prepare modified white carbon black, and the preparation method of the modified white carbon black comprises the following steps: mixing white carbon black and a modifier, heating at 120-150 ℃, and cooling to obtain the product; the modifier consists of at least one of polyethylene glycol and gamma-aminopropyltriethoxysilane and bis- (gamma-triethoxysilylpropyl) -tetrasulfide according to the mass ratio of (2-4) to (3-4).
4. The flexible rubber roller shell for a charging roller according to claim 3, characterized in that: the modifier consists of polyethylene glycol, gamma-aminopropyltriethoxysilane and bis- (gamma-triethoxysilylpropyl) -tetrasulfide according to the mass ratio of (1-2) to (3-4).
5. The flexible rubber roller shell for a charging roller according to claim 3, characterized in that: the mass ratio of the white carbon black to the modifier in the modified white carbon black is (8-10) to (2-3).
6. A process for preparing a flexible rubber sleeve for a charging roller according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
s1: putting the polysulfide rubber and the benzoxazine resin into an internal mixer together to prepare an internal mixing material;
s2: and (3) mixing the banburying material prepared in the step (S1) with a vulcanizing agent, a foaming agent, a reinforcing agent and a conductive agent, rolling, and pressing for forming to obtain the conductive rubber.
7. The process for producing a flexible rubber roller shell for a charging roller according to claim 6, characterized in that: in the step S2, after the reinforcing agent is added, the liquid nitrile rubber with the amino end capping is added before mixing and open mixing; the mass ratio of the amino-terminated liquid nitrile rubber to the benzoxazine resin is (0.5-2) to (9-11).
8. The process for producing a flexible rubber roller shell for a charging roller according to claim 7, characterized in that: in the step S2, after the amino-terminated liquid nitrile rubber is added, diphenyl guanidine is also added before mixing and open mixing; the addition amount of the diphenyl guanidine is 2-5 parts.
9. A charging roller characterized in that: the flexible rubber roller sleeve comprises a roller core and a flexible rubber roller sleeve wrapped outside the roller core, wherein the flexible rubber roller sleeve is prepared by the preparation process of the flexible rubber roller sleeve for the charging roller in any one of claims 6 to 8.
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| CN202211734437.9A CN115873409B (en) | 2022-12-30 | 2022-12-30 | Flexible rubber roller sleeve for charging roller, preparation process of flexible rubber roller sleeve and charging roller |
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| JP2010019991A (en) * | 2008-07-09 | 2010-01-28 | Canon Chemicals Inc | Conductive rubber roller and transfer roller |
| WO2018130196A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, applications in foamed product, and manufacturing method |
| WO2018130194A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, processing method, rubber products applying composite, and manufacturing method |
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| JP2010019991A (en) * | 2008-07-09 | 2010-01-28 | Canon Chemicals Inc | Conductive rubber roller and transfer roller |
| WO2018130196A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, applications in foamed product, and manufacturing method |
| WO2018130194A1 (en) * | 2017-01-13 | 2018-07-19 | 杭州星庐科技有限公司 | Rubber composite, processing method, rubber products applying composite, and manufacturing method |
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