CN101724272A - Silicon rubber for large-scale injection moulding vulcanization and preparation method thereof - Google Patents
Silicon rubber for large-scale injection moulding vulcanization and preparation method thereof Download PDFInfo
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- CN101724272A CN101724272A CN200910219396A CN200910219396A CN101724272A CN 101724272 A CN101724272 A CN 101724272A CN 200910219396 A CN200910219396 A CN 200910219396A CN 200910219396 A CN200910219396 A CN 200910219396A CN 101724272 A CN101724272 A CN 101724272A
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Abstract
The invention discloses silicon rubber for large-scale injection moulding vulcanization, which is characterized in that: the silicon rubber is prepared from the following raw materials in part by weight: 90 to 120 parts of silicon rubber, 20 to 50 parts of reinforcing agent, 1 to 8 parts of coupling agent, 0.05 to 0.5 part of vulcanizing agent, 1 to 3 parts of softening agent, 0.4 to 3.5 parts of active agent, 90 to 150 parts of flame retardant, and 1 to 3 parts of coloring agent. The method not only improves the mechanical strength of the heat vulcanized silicone rubber, but also improves all electric properties of the silicone rubber sheath and shed of a composite pillar insulator, and also improves the operational reliability of the composite pillar insulator.
Description
Technical field
The invention belongs to the silicon rubber and the preparation method of a kind of sulfidization molding in the composite insulator production field, especially a kind of silicon rubber and preparation method who is used for large-scale injection moulding vulcanization.
Background technology
At present, also mainly based on porcelain insulator, composite post insulator is a kind of insulator that grew up in recent years with insulator for high pressure and ultra-high voltage, and it mainly is made up of interior isolator, flange, silicone rubber jacket, and its forming method mainly contains following several because of the difference of isolator difference to some extent:
A kind of be by the Resins, epoxy plug be interior isolator and flange by behind the mucilage binding, by the sulfuration of injection vulcanizer, form silastic material again in the plug outside.
Another kind method is that isolator and flange by the sulfuration of injection vulcanizer, form silastic material in the plug outside by behind the mucilage binding in being done by the porcelain core rod.
More than two kinds of composite post insulators silastic material in manufacturing processed have following defective:
1) performances such as volume specific resistance, mechanical resistance tear strength, hydrophobic nature, hardness and mechanical resistance Zhang Du have much room for improvement, and silastic material is restricted in the application of high pressure and ultra-high voltage power transmission and distribution;
2) composite insulator is light than the body of porcelain, glass insulator, and its good hydrophobic nature, advantage such as antifouling more and more receive publicity, particularly in the application of high pressure and ultra-high voltage power transmission and distribution; But, because silicon rubber is in moulding process, tackle bigger injection device, in injection process, whether have the problems such as tearing toughness after good mobility, the moulding.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, a kind of used in composite insulator silicon rubber and preparation method thereof is provided, this method not only improves the physical strength of hot-vulcanized silicone rubber, and improved every electric property of composite post insulator silicone rubber jacket full skirt, improved the serviceability of composite post insulator.
The objective of the invention is to solve by the following technical programs: a kind of silicon rubber that is used for large-scale injection moulding vulcanization is characterized in that this silicon rubber is prepared from according to following materials based on weight:
90～120 parts in silicon rubber, 20～50 parts of strengthening agents, 1～8 part of coupling agent, 0.05～0.5 part of vulcanizing agent, 1～3 part of tenderizer, 0.4～3.5 part of promoting agent, 90～150 parts of fire retardants, 1～3 part of tinting material.
The preparation method that this is used for the silicon rubber of large-scale injection moulding vulcanization may further comprise the steps:
1) takes by weighing 1～3 part of 90～120 parts in silicon rubber, 20～50 parts of strengthening agents, 1～8 part of coupling agent, 90～150 parts of fire retardants, 1～3 part of tenderizer, 0.4～3.5 part of promoting agent and tinting material according to parts by weight;
2) with above-mentioned parts by weight silicon rubber and tinting material in kneader mixing 5～10 minutes, add 1～3 part of tenderizer then, get the strengthening agent and the coupling agent of 1/2 parts by weight more respectively, environment with 90 ℃～100 ℃ mixes, and behind the mixing 30-50min, add remaining strengthening agent and coupling agent again, mixing 60～100min; In 90 ℃～100 ℃ environment, add at twice more then, be 30-50min pitch time, adds the fire retardant of the heavy umber of 1/2 amount at every turn; After treating that fire retardant adds, add-on weighs the promoting agent of umber, mixing 50～80min again; Control vacuum tightness-0.07mpa vacuumizes 10～30min; Normal temperature is placed 8～24h down, promptly gets rubber master batch;
3) take by weighing above-mentioned steps 1) rubber master batch, add 0.05～0.5 part of vulcanizing agent DCP, place 24h at least under the mixing 30～50min, normal temperature, promptly get silicon rubber gross rubber;
4) the step 3) silicon rubber gross rubber is inserted in the injection moulding vulcanization machine, in 50 ℃～75 ℃ plasticizing 30～60min;
5) will be coated with the porcelain core rod that is brushed with caking agent and put into mould, in 140～170 ℃, pressure 150～180KN/m
2, injection sulfuration 5～7h promptly gets silicon rubber.
Silicon rubber is methyl vinyl silicone rubber or methyl silicone rubber in the above-mentioned steps; Strengthening agent is white carbon black or ultra-fine white carbon black; Described coupling agent is aminopropyl triethoxysilane KH550 or γ-(methacryloxypropyl) oxypropyl trimethyl silane KH570, mass concentration 〉=95% of aminopropyl triethoxysilane KH550 or γ-(methacryloxypropyl) oxypropyl trimethyl silane KH570; Vulcanizing agent is dicumyl peroxide DCP or N, penylene bismaleimides PDM between N-; Tenderizer is a methyl-silicone oil; Promoting agent is a zinc oxide; Fire retardant is aluminium hydroxide or magnesium hydroxide, and the following particle diameter particle of its 4um is not less than 75%; Tinting material is that black wood charcoal is black.
The silicon rubber of the preparation of composite insulator silicon rubber prescription of the present invention has following beneficial effect:
(1) composite insulator silicon rubber that adopts above-mentioned prescription and utilize this prescription to make can have effective adhesive with the porcelain core rod; And compare with conventional formulation, the present invention be on the basis of silicon rubber, further add strengthening agent, coupling agent aminopropyl triethoxysilane KH550 or γ-(methacryloxypropyl) oxypropyl trimethyl silane KH570 make the silicon rubber cluster parachute physicalies such as tearing toughness, visual appearance, elastic deformation, flowability obtain bigger raising;
(2) the present invention makes every electric property of rubber sheath full skirt be improved by further add fire retardant and coupling agent on the basis of silicon rubber, and has improved the serviceability of composite insulator.
Embodiment
Below in conjunction with embodiment the present invention is done and to describe in further detail.Following embodiment is not used for limiting practical range of the present invention.
Embodiment 1
Be used for the preparation method of the silicon rubber of large-scale injection moulding vulcanization, may further comprise the steps:
1) takes by weighing 0.4 part in black 2 parts of 100 parts of methyl vinyl silicone rubbers, tinting material black wood charcoal, 30 parts of the white carbon blacks of strengthening agent, 2.5 parts of coupling agent aminopropyl triethoxysilane KH550,110 parts in fire retardant aluminium hydroxide, 2 parts of tenderizer methyl-silicone oils and promoting agent zinc oxide according to parts by weight;
2) the black kneader of putting into of methyl vinyl silicone rubber that step 1) is taken by weighing and tinting material black wood charcoal, add 2 parts of methyl-silicone oils after mixing 5～10 minutes, add white carbon black, coupling agent aminopropyl triethoxysilane KH550 more at twice, its mass concentration is not less than 95%; Add for the first time each half of white carbon black, KH550,15 parts of promptly white carbon blacks, 1.25 parts of KH550, and mix with 90 ℃ environment, add again after mixing 40 minutes white carbon black, KH550 remaining half, and mixing 80 minutes; Add fire retardant aluminium hydroxide in 90 ℃ environment more at twice, the following particle diameter particle of aluminium hydroxide 4um is not less than 75%, adds 1/2 amount at every turn, and twice adds pitch time is 40 minutes; The zinc oxide of the heavy umber of add-on again, treat that zinc oxide adds after, mixing 60 minutes; Vacuumized 20 minutes, when vacuum tightness picks up counting during to-0.07mpa, Open valve pressure release is then taken out normal temperature and was placed 16 hours down, promptly makes rubber master batch again;
3) get above-mentioned steps 1) rubber master batch, add 0.1 part of vulcanizing agent dicumyl peroxide DCP, mixing 30 minutes, normal temperature was placed 24 hours down at least, promptly got silicon rubber gross rubber;
4) the step 3) silicon rubber gross rubber is inserted in the injection moulding vulcanization machine, in 50 ℃ of plasticizings 30 minutes;
5) will be coated with the porcelain core rod that is brushed with caking agent and put into mould, in 140 ℃, pressure 150KN/m
2, injection sulfuration 5 hours promptly gets silicon rubber.
Embodiment 2
Be used for the preparation method of the silicon rubber of large-scale injection moulding vulcanization, may further comprise the steps:
1) according to parts by weight take by weighing black 1 part of 90 parts of methyl silicone rubbers, tinting material black wood charcoal, 20 parts of the ultra-fine white carbon blacks of strengthening agent, coupling agent γ-1 part of (methacryloxypropyl) oxypropyl trimethyl silane KH570,90 parts in fire retardant aluminium hydroxide, 1 part of tenderizer methyl-silicone oil and and 2 parts in promoting agent zinc oxide;
2) methyl vinyl silicone rubber that step 1) is taken by weighing and tinting material black wood charcoal are black puts into kneader, adds ultra-fine white carbon black, coupling agent KH570 after mixing 5～10 minutes more at twice, and its mass concentration is not less than 95%; Add half of ultra-fine white carbon black, each component of coupling agent KH570 the first time, be 10 parts of ultra-fine white carbon blacks, 0.5 part of KH570, and add 1 part of methyl-silicone oil, mix with 95 ℃ environment, add again after mixing 30 minutes ultra-fine white carbon black, KH570 remaining half, and after mixing 60 minutes; Add fire retardant aluminium hydroxide in 95 ℃ environment more at twice, the following particle diameter particle of aluminium hydroxide 4um is not less than 75%, adds 1/2 amount at every turn, and be 30 minutes twice pitch time; The zinc oxide of the heavy umber of add-on again, treat that zinc oxide adds after, mixing 50 minutes; Vacuumized 10 minutes, when vacuum tightness picks up counting during to-0.07mpa, Open valve pressure release is then taken out normal temperature and was placed 8 hours down, promptly makes rubber master batch again;
3) get above-mentioned steps 1) rubber master batch, vulcanizing agent N, penylene bismaleimides PDM is 0.05 part between N-, and mixing 40 minutes, normal temperature was placed 24 hours down at least, promptly got silicon rubber gross rubber;
4) the step 3) silicon rubber gross rubber is inserted in the injection moulding vulcanization machine, in 75 ℃ of plasticizings 40 minutes;
5) will be coated with the porcelain core rod that is brushed with caking agent and put into mould, in 170 ℃, pressure 160KN/m
2, injection sulfuration 6 hours promptly gets silicon rubber.
Embodiment 3
Be used for the preparation method of the silicon rubber of large-scale injection moulding vulcanization, may further comprise the steps:
1) according to parts by weight take by weighing black 3 parts of 120 parts of methyl vinyl silicone rubbers, tinting material black wood charcoal, 50 parts of the white carbon blacks of strengthening agent, coupling agent γ-8 parts of (methacryloxypropyl) oxypropyl trimethyl silane KH570,150 parts of fire retardant magnesium hydroxides, 3 parts of tenderizer methyl-silicone oils and and 3.5 parts in promoting agent zinc oxide;
2) the black kneader of putting into of methyl vinyl silicone rubber that step 1) is taken by weighing and tinting material black wood charcoal, add white carbon black, coupling agent KH570 after mixing 5～10 minutes more at twice, its mass concentration is not less than 95%, add half of each component the first time, be 25 parts of white carbon blacks, 4 parts of KH570, and add 3 parts of methyl-silicone oils, mix with 100 ℃ environment, add again after mixing 50 minutes white carbon black, each component of coupling agent KH570 remaining half, mixing 100 minutes; Add fire retardant magnesium hydroxide in 100 ℃ of environment more at twice, the following particle diameter particle of its 4um is not less than 75%, adds 1/2 amount at every turn, and be 50 minutes twice pitch time; The zinc oxide of the heavy umber of add-on again, treat that zinc oxide adds after, mixing 80 minutes; Vacuumized 30 minutes, when vacuum tightness picks up counting during to-0.07mpa, Open valve pressure release is then taken out normal temperature and was placed 24 hours down, promptly makes rubber master batch again;
3) get above-mentioned steps 1) rubber master batch, add 0.05 part of vulcanizing agent dicumyl peroxide DCP, mixing 50 minutes, normal temperature was placed 24 hours down at least, promptly got silicon rubber gross rubber;
4) the step 3) silicon rubber gross rubber is inserted in the injection moulding vulcanization machine, in 60 ℃ of plasticizings 60 minutes;
5) will be coated with the porcelain core rod that is brushed with caking agent and put into mould, in 160 ℃, pressure 180KN/m
2, injection sulfuration 7 hours promptly gets silicon rubber.
Embodiment 4
Be used for the preparation method of the silicon rubber of large-scale injection moulding vulcanization, may further comprise the steps:
1) takes by weighing black 3 parts of 110 parts of methyl vinyl silicone rubbers, 1.8 parts in promoting agent zinc oxide, 40 parts of the white carbon blacks of strengthening agent, coupling agent γ-5 parts of (methacryloxypropyl) oxypropyl trimethyl silane KH570,120 parts of fire retardant magnesium hydroxides, 2.5 parts of tenderizer methyl-silicone oils and tinting material black wood charcoal according to parts by weight;
2) the black kneader of putting into of methyl vinyl silicone rubber that step 1) is taken by weighing and tinting material black wood charcoal, add white carbon black, coupling agent KH570 after mixing 5～10 minutes more at twice, its mass concentration is not less than 95%, add half of each component the first time, be 20 parts of white carbon blacks, 2.5 parts of KH570, and add 2.5 parts of methyl-silicone oils, mix with 95 ℃ environment, add again after mixing 40 minutes each component remaining half, after mixing 90 minutes; Add fire retardant magnesium hydroxide in 95 ℃ of environment more at twice, the following particle diameter particle of its 4um is not less than 75%, adds 1/2 amount at every turn, and be 25 minutes twice pitch time; The zinc oxide of the heavy umber of add-on again, treat that zinc oxide adds after, mixing 80 minutes; Vacuumized 25 minutes, when vacuum tightness picks up counting during to-0.07mpa, Open valve pressure release is then taken out normal temperature and was placed 24 hours down, promptly makes rubber master batch again;
3) get above-mentioned steps 1) rubber master batch, add vulcanizing agent N, penylene bismaleimides PDM0.5 part between N-, mixing 35 minutes, normal temperature was placed 24 hours down at least, promptly got silicon rubber gross rubber;
4) the step 3) silicon rubber gross rubber is inserted in the injection moulding vulcanization machine, in 70 ℃ of plasticizings 60 minutes;
5) will be coated with the porcelain core rod that is brushed with caking agent and put into mould, in 165 ℃, pressure 170KN/m
2, injection sulfuration 6 hours promptly gets silicon rubber.
The composite insulator silicon rubber of the above-mentioned preparation of the present invention has improved every electric property of composite post insulator silicone rubber jacket full skirt, has improved the serviceability of composite insulator.
Claims (10)
1. a silicon rubber that is used for large-scale injection moulding vulcanization is characterized in that, this silicon rubber is prepared from according to following materials based on weight:
90～120 parts in silicon rubber, 20～50 parts of strengthening agents, 1～8 part of coupling agent, 0.05～0.5 part of vulcanizing agent, 1～3 part of tenderizer, 0.4～3.5 part of promoting agent, 90～150 parts of fire retardants, 1～3 part of tinting material.
2. a kind of silicon rubber that is used for large-scale injection moulding vulcanization according to claim 1 is characterized in that described silicon rubber is methyl vinyl silicone rubber or methyl silicone rubber.
3. a kind of silicon rubber that is used for large-scale injection moulding vulcanization according to claim 1 is characterized in that, described strengthening agent is white carbon black or ultra-fine white carbon black.
4. a kind of silicon rubber that is used for large-scale injection moulding vulcanization according to claim 1, it is characterized in that, described coupling agent is aminopropyl triethoxysilane KH550 or γ-(methacryloxypropyl) oxypropyl trimethyl silane KH570, mass concentration 〉=95% of aminopropyl triethoxysilane KH550 or γ-(methacryloxypropyl) oxypropyl trimethyl silane KH570.
5. a kind of silicon rubber that is used for large-scale injection moulding vulcanization according to claim 1 is characterized in that described vulcanizing agent is dicumyl peroxide DCP or N, penylene bismaleimides PDM between N-.
6. a kind of silicon rubber that is used for large-scale injection moulding vulcanization according to claim 1 is characterized in that described tenderizer is a methyl-silicone oil.
7. a kind of silicon rubber that is used for large-scale injection moulding vulcanization according to claim 1 is characterized in that described promoting agent is a zinc oxide.
8. a kind of silicon rubber that is used for large-scale injection moulding vulcanization according to claim 1 is characterized in that described fire retardant is aluminium hydroxide or magnesium hydroxide, the following particle diameter particle of its 4um 〉=75%.
9. a kind of silicon rubber that is used for large-scale injection moulding vulcanization according to claim 1 is characterized in that, described tinting material is that black wood charcoal is black.
10. a preparation method who is used for the silicon rubber of large-scale injection moulding vulcanization is characterized in that, this method may further comprise the steps:
1) takes by weighing 1～3 part of 90～120 parts in silicon rubber, 20～50 parts of strengthening agents, 1～8 part of coupling agent, 90～150 parts of fire retardants, 1～3 part of tenderizer, 0.4～3.5 part of promoting agent and tinting material according to parts by weight;
2) with above-mentioned parts by weight silicon rubber and tinting material in kneader mixing 5～10 minutes, add 1～3 part of tenderizer then, get the strengthening agent and the coupling agent of 1/2 parts by weight more respectively, environment with 90 ℃～100 ℃ mixes, and behind the mixing 30-50min, add remaining strengthening agent and coupling agent again, mixing 60～100min; In 90 ℃～100 ℃ environment, add at twice more then, be 30-50min pitch time, adds the fire retardant of the heavy umber of 1/2 amount at every turn; After treating that fire retardant adds, add-on weighs the promoting agent of umber, mixing 50～80min again; Control vacuum tightness-0.07mpa vacuumizes 10～30min; Normal temperature is placed 8～24h down, promptly gets rubber master batch;
3) get above-mentioned steps 1) rubber master batch, add 0.05～0.5 part of vulcanizing agent DCP, place 24h at least under the mixing 30～50min, normal temperature, promptly get silicon rubber gross rubber;
4) the step 3) silicon rubber gross rubber is inserted in the injection moulding vulcanization machine, in 50 ℃～75 ℃ plasticizing 30～60min;
5) will be coated with the porcelain core rod that is brushed with caking agent and put into mould, in 140～170 ℃, pressure 150～180KN/m
2, injection sulfuration 5～7h promptly gets silicon rubber.
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