CN103724904B - A kind of Low-voltage-variabilacrylate acrylate rubber material and preparation method thereof - Google Patents

A kind of Low-voltage-variabilacrylate acrylate rubber material and preparation method thereof Download PDF

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CN103724904B
CN103724904B CN201310750465.4A CN201310750465A CN103724904B CN 103724904 B CN103724904 B CN 103724904B CN 201310750465 A CN201310750465 A CN 201310750465A CN 103724904 B CN103724904 B CN 103724904B
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seconds
rubber
acrylate
processing aid
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CN103724904A (en
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徐海潮
吴会会
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Nanjing Jinsanli Macromolecule Science And Technology Co ltd
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Nanjing Jinsanli Rubber & Plastic Co Ltd
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Abstract

The invention discloses acrylic elastomer material of a kind of low pressure change and preparation method thereof, belong to field of rubber preparation.Its concrete component and mass percent are: acrylate 100 parts, stearic acid 1 ~ 1.5 part, processing aid WB2221 ~ 1.5 part, 18D0.30 ~ 0.38 part, fast extrusion carbon black 58 ~ 62 parts, semi-reinforcing hydrocarbon black 10 ~ 20 parts, softening softening agent TP-7592 ~ 10 part, 4,4 ˊ-two (propyloxy phenyl base) pentanoic 1.5 ~ 2.5 parts, crosslinking coagent HMDC-10.35 ~ 0.5 part, 1.8 ~ 2.2 parts, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene.Its preparation process is: masterbatch mix; Master batch two sections adds sulphur; Sulfuration; Post cure.Can acrylate material formula provided by the invention meet VW? the technical requirement of TL52293, and in compression set much smaller than deflection lower than 50% requirement.

Description

A kind of Low-voltage-variabilacrylate acrylate rubber material and preparation method thereof
Technical field
The invention belongs to field of rubber technology, particularly be a kind of Low-voltage-variabilacrylate acrylate rubber material and preparation method thereof.
Background technology
Rubber seal is the vitals of motor car engine, and the quality of its sealing effectiveness directly affects the work-ing life of engine.So motor car engine rubber seal performance requriements is comparatively strict, standard of materials adopts germany volkswagen TL52293, all experimental performances all complete [except PV3307(plastics, the test of elastomeric variable sexual type) compression set except] with finished product, key characteristic has initial powerful > 9MPa, elongation > 200%, after resistance to elevated temperatures 150 DEG C × 504h hot air aging, changes in hardness 0 ~+8, powerful > 8, elongation > 150%; After in Lubrizol lubricating oil OS206404,150 DEG C × 504h soaks, changes in hardness-3 ~+10, powerful > 6, elongation > 150%, changes in weight 0 ~+10; Particularly 1. compression set performance, the compression set < 50% after 150 DEG C × 22h hot air aging.If do not talk test method, only see index, this requires that acrylic elastomer is easy to reach, but the test method required is germany volkswagen PV3330 and PV3307 standard, PV3330 experimental technique comparatively GB pressure change (GB/7759) and the international test method becoming (ISO815) of pressing requires harshness, after requiring that sample takes out cooling from high-temperature cabinet, compression clamper is unclamped, the compression set of sample is measured again after allowing sample recover 30 minutes, the PV3330 of germany volkswagen is then after sample takes out cooling from high-temperature cabinet, unclamp compression clamper and complete experiment in 20 seconds, for this viscoelastic material of rubber, in 20 seconds, sample has little time to recover at all.Therefore its severe is self-evident; And the PV3307 of germany volkswagen is after sample takes out cooling from high-temperature cabinet, unclamp compression clamper and complete experiment test in 5 seconds, require more harsh than PV3330 experimental technique, its complexity is well imagined.2. resistance to low temperature, the resistance to low temperature (temperature limit of brittleness) of general technology index request acrylic elastomer is within-30 DEG C, and germany volkswagen TL52293 material experiment standard-required acrylic elastomer resistance to low temperature is deposit 22 hours under-35 DEG C of conditions after, still there is elasticity, doubling crooked test, do not allow to fracture and crack, its severe required is well imagined.
In the selection of acrylic elastomer sealing member material vulcanization system, tradition adopts the vulcanization system of soap/sulfur cross-linking system or triazines usually, make the heat-resistant aging of acrylic elastomer and heat-resisting oiliness is poor, compression set is large, low temperature resistant bad, large to the corrodibility of mould.
Summary of the invention
1, the technical problem that will solve is invented
For the deficiency that above-mentioned prior art exists, the invention provides a kind of high temperature resistant, resistance to insulation oily, low temperature resistant, to little Low-voltage-variabilacrylate acrylate rubber material of mould corrodibility and preparation method thereof, it can not only meet the technical requirement of germany volkswagen TL52293, and not containing European market forbidding carcinogens N, N'-di-o-tolylguanidine (DOTG).
2, technical scheme
Low-voltage-variabilacrylate acrylate rubber material, concrete component and quality proportioning as follows:
In order to make acrylic elastomer material have, low pressure becomes, high temperature resistant, oil resistant, low temperature resistant characteristic in the present invention, adopt the acrylate rubber of amines catalysis to be matrix and amine vulcanization system and add rubber antioxidant, high temperature resistant, the oil resistant that improve acrylic elastomer material soak and the low compression set performance of excellence; Select the fast tensile strength at yield extruding carbon black raising elastomeric material, select the semi-reinforcing hydrocarbon black use with favorable elasticity and compression set simultaneously, so both improve intensity and elongation at break properties that the elasticity of acrylate sizing material and compression set in turn ensure that sizing material; Select the softening softening agent of high-and low-temperature resistance excellence to improve low temperature resistant, the resistance to elevated temperatures of acrylic elastomer, thus meet the use properties of material.
A preparation method for Low-voltage-variabilacrylate acrylate rubber material, the steps include:
(1) masterbatch mix:
Acrylate rubber is placed in Banbury mixer to plasticate 60 ~ 80 seconds, then stearic acid, processing aid WB222, processing aid 18D and 4 is added, mixing 30 ~ 40 seconds of 4'-bis-(propyloxy phenyl base) pentanoic, add extrusion carbon black N550, semi-reinforcing hydrocarbon black N774 and softening softening agent TP-759 banburying soon and within 80 ~ 100 seconds, rise bolt afterwards 100 ~ 120 seconds, melting temperature reaches 130 ~ 140 DEG C of binder removals, and is parked by master batch;
(2) master batch two sections adds sulphur:
Master batch after parking is placed in Banbury mixer and plasticates 70 ~ 90 seconds, add crosslinking coagent HMDC-1, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene, treat that temperature reaches 110 ~ 120 DEG C of binder removals;
(3) sulfuration: two sections are added sulphur rubber unvulcanizate shaping after insert mould, on vulcanizer, 180 ~ 185 DEG C × 10min obtains cross-linked rubber;
(4) post vulcanization: the post cure cross-linked rubber obtained being carried out 170 DEG C × 180min ~ 240min, to deepen the cross-linking density of cross-linked rubber further, namely obtains low pressure and becomes acrylic elastomer.
The storage period of the master batch after described step (1) masterbatch mix is greater than 8 hours, makes mutually fully to be disperseed between acrylic elastomer and each Synergist S-421 95, and intermolecular combination produces synergistic effect, and rubber unvulcanizate is uniformly dispersed.
Described step (2) master batch two sections add sulphur adopt Banbury mixer add sulphur, vulcanizing agent is disperseed in master batch evenly.
3, beneficial effect
Adopt technical scheme provided by the invention, there is following unusual effect:
(1) adopt Banbury mixer to carry out master batch two-stage mixing and add sulphur, make more easily mutually fully to be disperseed between acrylic elastomer and vulcanizing agent, intermolecular combination produces synergistic effect, and rubber unvulcanizate dispersing uniformity is significantly improved, and the rubber unvulcanizate material of gained has the feature little to mould corrodibility;
(2) fill a prescription according to Low-voltage-variabilacrylate acrylate rubber material provided by the invention, have employed rubber antioxidant and 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene is the vulcanization system of vulcanizing agent, and acrylic elastomer material of the present invention is not only had, and low pressure becomes, high temperature resistant, oil resistant, low temperature resistant characteristic;
(3) sealing member material adopting the technical scheme of Low-voltage-variabilacrylate acrylate rubber material provided by the invention to obtain is not containing European market forbidding carcinogens N, and N'-di-o-tolylguanidine (DOTG), meets ROHS index and Reach regulation.
(4) provide technical scheme according to of the present invention, when fast extrude that carbon black N550 is 58 parts, semi-reinforcing hydrocarbon black N774 is 10 parts, softening softening agent TP-759 is 2 parts time, its over-all properties is optimum, and especially compression set performance is best.
Embodiment
Embodiment 1:
Low-voltage-variabilacrylate acrylate rubber material, concrete component and proportioning as follows: acrylate 100 parts, stearic acid 1 part, processing aid WB222 is 1 part, processing aid 18D is 0.35 part, and fast extrusion carbon black N550 is 62 parts, and semi-reinforcing hydrocarbon black N774 is 20 parts, softening softening agent TP-759 is 10 parts, 4,4'-bis-(propyloxy phenyl base) pentanoic is 2 parts, and crosslinking coagent HMDC-1 is 0.5 part, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene is 2 parts.
Acrylate rubber is the AR14 acrylic elastomer that Nippon Zeon Co., Ltd. produces; Fast extrusion carbon black is that the N550 that Cabot Co., Ltd produces extrudes carbon black soon; Semi-reinforcing hydrocarbon black is the N774 semi-reinforcing hydrocarbon black that Suzhou Bao Hua carbon black company limited produces; Stearic acid is that Malaysian southern grease company produces; 4,4' bis-(propyloxy phenyl base) pentanoic is the anti-aging agent No. 445(CAS: 10081-67-1 that Jiangsu Huada Chemical Group Co., Ltd. produces); Processing aid No. WB222(CAS: 115-83-3), processing aid No. 18D(CAS: 124-30-1), softening softening agent No. TP-795(CAS: 141-17-3), crosslinking coagent No. HMDC-1(CAS: 143-06-6) and the supplier of vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene (No. CAS: 6674-22-2) are all upper seascape favour Chemical Co., Ltd.s.
According to above-mentioned quality proportioning, the preparation method of Low-voltage-variabilacrylate acrylate rubber material, the steps include:
(1) masterbatch mix:
Acrylate rubber is placed in Banbury mixer to plasticate 75 seconds, then stearic acid, processing aid WB222, processing aid 18D and 4 is added, mixing 35 seconds of 4'-bis-(propyloxy phenyl base) pentanoic, add extrusion carbon black N550, semi-reinforcing hydrocarbon black N774 and softening softening agent TP-759 banburying soon and within 90 seconds, rise bolt afterwards 116 seconds, melting temperature reaches 135 DEG C of binder removals; Master batch parks 10 hours, makes mutually fully to be disperseed between acrylic elastomer and each Synergist S-421 95, and intermolecular combination produces synergistic effect, and rubber unvulcanizate is uniformly dispersed;
(2) master batch two sections adds sulphur:
Master batch after parking is placed in Banbury mixer and plasticates 80 seconds, add crosslinking coagent HMDC-1, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene, treat that temperature reaches 115 DEG C of binder removals;
(3) sulfuration: two sections are added sulphur rubber unvulcanizate shaping after insert mould, on vulcanizer, 180 DEG C × 10min obtains cross-linked rubber, namely low pressure become acrylic elastomer;
(4) post vulcanization: the post cure cross-linked rubber obtained being carried out 170 DEG C × 240min, to deepen the cross-linking density of cross-linked rubber further.
The acrylic elastomer testing of materials performance that a kind of low pressure preparing gained becomes is as shown in table 1, and wherein standard of materials is TL52293 (sample except PV3307 permanent compression test is except standard test piece, and all the other samples are product).
Table 1 embodiment 1: the acrylic elastomer testing of materials performance that low pressure becomes
The acrylic elastomer material property material that the low pressure that this example obtains becomes, can not only meet TL52293 technical requirement, has low pressure change, high temperature resistant, oil resistant, low temperature resistant characteristic, and can meet European Union ROHS instruction and REACH laws and regulations requirement; Adopt Banbury mixer to add the mixing glue material of acrylate that sulphur obtains through this example and there is the feature less to the contaminative of mould.
Embodiment 2:
Low-voltage-variabilacrylate acrylate rubber material, concrete component and proportioning as follows: acrylate 100 parts, stearic acid 1.25 parts, processing aid WB222 is 1.25 parts, processing aid 18D is 0.30 part, and fast extrusion carbon black N550 is 58 parts, and semi-reinforcing hydrocarbon black N774 is 10 parts, softening softening agent TP-759 is 2 parts, 4,4'-bis-(propyloxy phenyl base) pentanoic is 1.5 parts, and crosslinking coagent HMDC-1 is 0.42 part, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene is 1.8 parts; According to above-mentioned quality proportioning, the preparation method of Low-voltage-variabilacrylate acrylate rubber material, the steps include:
((1) masterbatch mix:
Acrylate rubber is placed in Banbury mixer to plasticate 60 seconds, then stearic acid, processing aid WB222, processing aid 18D and 4 is added, mixing 40 seconds of 4'-bis-(propyloxy phenyl base) pentanoic, add extrusion carbon black N550, semi-reinforcing hydrocarbon black N774 and softening softening agent TP-759 banburying soon and within 100 seconds, rise bolt afterwards 120 seconds, melting temperature reaches 130 DEG C of binder removals; Master batch parks 8.5 hours, makes mutually fully to be disperseed between acrylic elastomer and each Synergist S-421 95, and intermolecular combination produces synergistic effect, and rubber unvulcanizate is uniformly dispersed;
(2) master batch two sections adds sulphur:
Master batch after parking is placed in Banbury mixer and plasticates 70 seconds, add crosslinking coagent HMDC-1, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene, treat that temperature reaches 110 DEG C of binder removals;
(3) sulfuration: two sections are added sulphur rubber unvulcanizate shaping after insert mould, on vulcanizer, 183 DEG C × 10min obtains cross-linked rubber, namely low pressure become acrylic elastomer;
(4) post vulcanization: the post cure cross-linked rubber obtained being carried out 170 DEG C × 200min, to deepen the cross-linking density of cross-linked rubber further.
The acrylic elastomer testing of materials performance that a kind of low pressure preparing gained becomes is as shown in table 2, and wherein standard of materials is TL52293 (sample except PV3307 permanent compression test is except standard test piece, and all the other samples are product).
Table 2 embodiment 2: the acrylic elastomer testing of materials performance that low pressure becomes
The acrylic elastomer material property that the low pressure that this example obtains becomes can not only meet the requirement of technical indicator L52293, and various performance is better than the performance of embodiment 1 table 1, especially PV3307 compression set performance and PV330 compression set performance are much better than the compression set performance in embodiment 1 table 1; And European Union ROHS instruction and REACH laws and regulations requirement can be met; Adopt Banbury mixer to add the mixing glue material of acrylate that sulphur obtains through this example and there is the feature less to the contaminative of mould.
Embodiment 3
Low-voltage-variabilacrylate acrylate rubber material, concrete component and proportioning as follows: acrylate 100 parts, stearic acid 1.5 parts, processing aid WB222 is 1.5 parts, processing aid 18D is 0.38 part, and fast extrusion carbon black N550 is 60 parts, and semi-reinforcing hydrocarbon black N774 is 15 parts, softening softening agent TP-759 is 6 parts, 4,4'-bis-(propyloxy phenyl base) pentanoic is 2.5 parts, and crosslinking coagent HMDC-1 is 0.35 part, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene is 2.2 parts; According to above-mentioned quality proportioning, the preparation method of Low-voltage-variabilacrylate acrylate rubber material, the steps include:
((1) masterbatch mix:
Acrylate rubber is placed in Banbury mixer to plasticate 80 seconds, then stearic acid, processing aid WB222, processing aid 18D and 4, mixing 30 seconds of 4'-bis-(propyloxy phenyl base) pentanoic, add extrusion carbon black N550, semi-reinforcing hydrocarbon black N774 and softening softening agent TP-759 banburying soon and within 80 seconds, rise bolt afterwards 100 seconds, melting temperature reaches 140 DEG C of binder removals; Master batch parks 9 hours, makes mutually fully to be disperseed between acrylic elastomer and each Synergist S-421 95, and intermolecular combination produces synergistic effect, and rubber unvulcanizate is uniformly dispersed;
(2) master batch two sections adds sulphur:
Master batch after parking is placed in Banbury mixer and plasticates 90 seconds, add crosslinking coagent HMDC-1, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene, treat that temperature reaches 120 DEG C of binder removals;
(3) sulfuration: two sections are added sulphur rubber unvulcanizate shaping after insert mould, on vulcanizer, 185 DEG C × 10min obtains cross-linked rubber, namely low pressure become acrylic elastomer;
(4) post vulcanization: the post cure cross-linked rubber obtained being carried out 170 DEG C × 180min, to deepen the cross-linking density of cross-linked rubber further.
The similar nature of the table 1 in the acrylic elastomer testing of materials performance that a kind of low pressure that the present embodiment prepares gained becomes and embodiment 1, but compression set performance is compared with table 2 slightly inferior properties in embodiment 2, after 150 DEG C × 22h is aging, PV3307 compression set deformation rate is 45.9%, PV3330 compression set deformation rate is 42.5%.European Union ROHS instruction and REACH laws and regulations requirement can be met, adopt Banbury mixer to add the mixing glue material of acrylate that sulphur obtains through this example and there is the feature less to the contaminative of mould, wherein standard of materials is TL52293 (sample except PV3307 permanent compression test is except standard test piece, and all the other samples are product).
Embodiment 4
Low-voltage-variabilacrylate acrylate rubber material, concrete component and proportioning as follows: acrylate 100 parts, stearic acid 1 part, processing aid WB222 is 1 part, processing aid 18D is 0.35 part, and fast extrusion carbon black N550 is 58 parts, and semi-reinforcing hydrocarbon black N774 is 10 parts, softening softening agent TP-759 is 5 parts, 4,4'-bis-(propyloxy phenyl base) pentanoic is 2.5 parts, and crosslinking coagent HMDC-1 is 0.5 part, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene is 2 parts;
According to above-mentioned quality proportioning, preparation method's step of Low-voltage-variabilacrylate acrylate rubber material is with embodiment 2, the similar nature of the table 2 in the acrylic elastomer testing of materials performance that a kind of low pressure preparing gained becomes and embodiment 2, but compression set performance is compared with table 2 slightly inferior properties in embodiment 2, after 150 DEG C × 22h is aging, PV3307 compression set deformation rate is 42.8%, PV3330 compression set deformation rate is 39.7%.European Union ROHS instruction and REACH laws and regulations requirement can be met, adopt Banbury mixer to add the mixing glue material of acrylate that sulphur obtains through this example and there is the feature less to the contaminative of mould, wherein standard of materials is TL52293 (sample except PV3307 permanent compression test is except standard test piece, and all the other samples are product).
Embodiment 5
Low-voltage-variabilacrylate acrylate rubber material, concrete component and proportioning as follows: acrylate 100 parts, stearic acid 1.5 parts, processing aid WB222 is 1.5 parts, processing aid 18D is 0.38 part, and fast extrusion carbon black N550 is 62 parts, and semi-reinforcing hydrocarbon black N774 is 10 parts, softening softening agent TP-759 is 8 parts, 4,4'-bis-(propyloxy phenyl base) pentanoic is 2 parts, and crosslinking coagent HMDC-1 is 0.35 part, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene is 1.8 parts;
According to above-mentioned quality proportioning, preparation method's step of Low-voltage-variabilacrylate acrylate rubber material is with embodiment 2, the similar nature of the table 2 in the acrylic elastomer testing of materials performance that a kind of low pressure preparing gained becomes and embodiment 2, European Union ROHS instruction and REACH laws and regulations requirement can be met, adopt Banbury mixer to add the mixing glue material of acrylate that sulphur obtains through this example and there is the feature less to the contaminative of mould, wherein standard of materials is that (sample except PV3307 permanent compression test is except standard test piece to TL52293, all the other samples are product), but compression set performance is compared with table 2 slightly inferior properties in embodiment 2, after 150 DEG C × 22h is aging, PV3307 compression set deformation rate is 46.8%, PV3330 compression set deformation rate is 42.7%.
In embodiment 1 ~ 5, in order to make, acrylic elastomer material low pressure becomes, high temperature resistant, oil resistant, low temperature resistant characteristic, adopt the acrylate rubber of amines catalysis to be matrix and amine vulcanization system and add rubber antioxidant, high temperature resistant, the oil resistant that improve acrylic elastomer material soak and the low compression set performance of excellence; Select the fast tensile strength at yield extruding carbon black raising elastomeric material, select the semi-reinforcing hydrocarbon black use with favorable elasticity and compression set simultaneously, so both improve the elasticity of acrylate sizing material and reduce intensity and the elongation at break properties that compression set in turn ensure that sizing material; Select the softening softening agent of high-and low-temperature resistance excellence to improve low temperature resistant, the resistance to elevated temperatures of acrylic elastomer; In order to obtain mixing uniform acrylic elastomer material, in embodiment 1 ~ 5, Banbury mixer is adopted to add sulphur, ensure that mixing homogeneity, lay a good foundation for obtaining the acrylic elastomer material of excellent combination property, obtain acrylic elastomer material not only there is the feature little to mold fouling, and European Union ROHS instruction and REACH laws and regulations requirement can be met, thus meet the use properties of material, reach the properties condition of popular Laboratory Accreditation.

Claims (2)

1. a preparation method for Low-voltage-variabilacrylate acrylate rubber material, the steps include:
(1) masterbatch mix:
Component is set and quality proportioning is:
Acrylate rubber 100 parts
Stearic acid 1 ~ 1.5 part
Processing aid WB2221 ~ 1.5 part
Processing aid 18D0.30 ~ 0.38 part
Fast extrusion carbon black N55058 ~ 62 part
Semi-reinforcing hydrocarbon black N77410 ~ 20 part
Softening softening agent TP-7592 ~ 10 part
4,4'-bis-(propyloxy phenyl base) pentanoic 1.5 ~ 2.5 parts
Crosslinking coagent HMDC-10.35 ~ 0.5 part
Vulcanizing agent 1.8 ~ 2.2 parts; Described vulcanizing agent is 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene;
Acrylate rubber is placed in Banbury mixer to plasticate 60 ~ 80 seconds, then stearic acid, processing aid WB222, processing aid 18D and 4 is added, mixing 30 ~ 40 seconds of 4'-bis-(propyloxy phenyl base) pentanoic, add extrusion carbon black N550, semi-reinforcing hydrocarbon black N774 and softening softening agent TP-759 banburying soon and within 80 ~ 100 seconds, rise bolt afterwards 100 ~ 120 seconds, melting temperature reaches 130 ~ 140 DEG C of binder removals, and is parked by master batch;
(2) master batch two sections adds sulphur:
Master batch after parking is placed in Banbury mixer and plasticates 70 ~ 90 seconds, add crosslinking coagent HMDC-1, vulcanizing agent 1,8-diazabicyclo [5.4.0] 11 carbon-7-alkene, treat that temperature reaches 110 ~ 120 DEG C of binder removals;
(3) sulfuration: two sections are added sulphur rubber unvulcanizate shaping after insert mould, on vulcanizer, 180 ~ 185 DEG C × 10min obtains cross-linked rubber, namely low pressure become acrylic elastomer;
(4) post vulcanization: the post cure cross-linked rubber obtained being carried out 170 DEG C × 180min ~ 240min, to deepen the cross-linking density of cross-linked rubber further.
2. the preparation method of a kind of Low-voltage-variabilacrylate acrylate rubber material according to claim 1, it is characterized in that: the storage period of the master batch after described step (1) masterbatch mix is greater than 8 hours, make mutually fully to be disperseed between acrylic elastomer and each Synergist S-421 95, intermolecular combination produces synergistic effect, and rubber unvulcanizate is uniformly dispersed.
CN201310750465.4A 2013-12-31 2013-12-31 A kind of Low-voltage-variabilacrylate acrylate rubber material and preparation method thereof Expired - Fee Related CN103724904B (en)

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