CN109880375A - A kind of ageing-resistant silicon rubber composite material and preparation method thereof - Google Patents
A kind of ageing-resistant silicon rubber composite material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of ageing-resistant silicon rubber composite materials, are made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber, 8-15 parts of perfluoroelastomers, 20-40 parts of fume colloidal silica, 3-8 parts of polyimides, 6-12 parts of aluminium hydroxide micro powder, 0.5-1.0 parts of silane coupling agent, 2-6 parts of dimethyl diethoxysilane, 1-3 parts of hydroxy silicon oil, 0.5-1.5 parts of Methyl Hydrogen Polysiloxane Fluid and 1-3 parts of vulcanizing agent.The ageing-resistant silicon rubber composite material of gained of the invention continues, and your hardness is high, and high mechanical strength, good electric property, anti-thermal aging property is excellent, can work long hours under the high temperature conditions.
Description
Technical field
The invention belongs to technical field of polymer materials, and in particular to a kind of ageing-resistant silicon rubber composite material and its preparation
Method.
Background technique
Electric(al) insulator is the important component in overhead transmission line, it is desirable that its with withstanding voltage and mechanical stress effect,
In recent years since silicon rubber has excellent high-low temperature resistant, oil resistant, chemical-resistant reagent, weather-proof and electrical insulation properties, in silicon rubber
It is used widely in glue composite insulator umbrella skirt sheath.But silastic material umbrella sheath draws in ultraviolet light all the year round
Under the high temperature and intense radiation effect of hair, oxidation reaction occurs for surface, and hydrophobicity decline leads to the anti-aging property of silastic material
Difference, service life are short.
The Chinese patent application of Publication No. CN108795051A discloses a kind of electric insulator umbrella sheath silicon rubber
Glue composition, contain following components in silicone rubber compound: raw-silastic continuously, modified natural rubber, white carbon black, aluminium hydroxide are micro-
Powder, silane coupling agent, diphenyl silanediol, cumyl peroxide and antistatic agent.Wherein, white carbon black selects vapor phase method hard charcoal
It is black；Contain LiClO in antistatic agent4、LiAsF6、LiBF4、LiPF6One of four kinds of lithium salt components or any a variety of mixing
Object.The silica-gel composition better mechanical property has higher thermal stability and ageing-resistant performance, and the service life is longer, reliably
Property is higher.But the patent raw material type is more, processing step is complicated, and cost of manufacture is higher.
Notification number is that the Chinese patent of CN105802240B discloses a kind of silicone rubber for composite insulator composite material.Institute
The silicon rubber composite material stated is by silicon rubber, fume colloidal silica, precipitated silica, modified halloysite nanotubes, structure control
Preparation and vulcanizing agent composition.The silicone rubber for composite insulator composite material of the invention have processing performance is good, breakdown voltage is high,
The advantages of anti creepage trace performance is good, good mechanical performance, can satisfy the requirement of composite insulator outer insulating material.But
It is that above-mentioned patent is compatible between covalent bond improvement material using being formed between modified halloysite nanotubes and silicone rubber matrix
Property, but raw material reinforcing effect is still poor, gained silicon rubber composite material mechanical performance is poor.
Summary of the invention
To overcome drawbacks described above, the purpose of the present invention is to provide a kind of ageing-resistant silicon rubber composite material and its preparation sides
Method.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber,
8-15 parts of perfluoroelastomers, 20-40 parts of fume colloidal silica, 3-8 parts of polyimides, 6-12 parts of aluminium hydroxide micro powder, silane are even
Agent 0.5-1.0 parts of connection, 2-6 parts of dimethyl diethoxysilane, 1-3 parts of hydroxy silicon oil, 0.5-1.5 parts of Methyl Hydrogen Polysiloxane Fluid and sulphur
1-3 parts of agent.
Preferably, the ageing-resistant silicon rubber composite material is made of the raw material of following parts by weight: methyl ethylene
100 parts of silicon rubber, 10 parts of perfluoroelastomers, 28 parts of fume colloidal silica, 5 parts of polyimides, 10 parts of aluminium hydroxide micro powder, silane
0.8 part of coupling agent, 4 parts of dimethyl diethoxysilane, 2 parts of hydroxy silicon oil, 1.0 parts of Methyl Hydrogen Polysiloxane Fluid and 1.5 parts of vulcanizing agent.
Preferably, the molecular weight of the methyl vinyl silicone rubber is 450000-650000, and contents of ethylene is
0.13-0.22%。
Preferably, the specific surface area of the fume colloidal silica is 150-250m3/ g, partial size 20-50nm.
Preferably, the silane coupling agent is KH560 or KH570.
Preferably, the vulcanizing agent is that bis 25 vulcanizing agent or peroxidating are bis- (2,4- dichloro-benzoyl).
A kind of preparation method of ageing-resistant silastic material, comprising the following steps:
(1) by methyl vinyl silicone rubber, perfluoroelastomers, dimethyl diethoxysilane, hydroxy silicon oil and methyl hydrogen silicon
Oil is put into mixer, and 20-30min is kneaded under the conditions of 40-50 DEG C, and fume colloidal silica, polyimides, hydroxide is then added
Aluminium micro mist and silane coupling agent are kneaded 10-20min under the conditions of 80-120 DEG C；
(2) the mixing glue that step (1) obtains is put into kneader, 20-30min is mediated under the conditions of 170-200 DEG C, then taken out true
Vacuum degree 0.03-0.06MPa, sky continues under the conditions of 170-200 DEG C of temperature to mediate 10-20min, dumping；
(3) kneading glue and vulcanizing agent that step (2) obtains are added in two-roll mill together, 35-45 DEG C of roller temperature, roll spacing 3-
5mm, is kneaded 2-5min, blanking, it is cooling to get.
Positive beneficial effect of the invention:
1. methyl vinyl silicone rubber of the present invention have excellent high-low temperature resistant, oil resistant, chemical-resistant reagent, it is weather-proof and it is electrical absolutely
Edge performance；Perfluoroelastomers have excellent chemical resistance, heat resistance, good toughness；Fume colloidal silica bulk multi-hole, dispersibility
Good, high temperature resistant can improve tensile strength, tear resistance and the wearability of silicon rubber, play reinforcing agent；Polyimides improves
The heat resistance of base-material；Aluminium hydroxide micro powder plays trace agent as tracking-resistant；Dimethyl diethoxysilane, hydroxy silicon oil and methyl contain
Hydrogen silicone oil is constitution controller, and the hydroxyl on fume colloidal silica surface is passivated, silicon rubber structured, methyl hydrogen is effectively prevent
Silicone oil can also promote the vulcanization of vulcanizing agent, guarantee that vulcanization is uniform.Compatibility is good between the various raw materials of the present invention, the ageing-resistant silicon of gained
Rubber composite material continues that hardness as 76-83 degree, and hardness is high；Tensile strength >=7.2MPa, tensile elongation >=453%, tearing are strong
Degree >=38.5kN/m, high mechanical strength；Breakdown strength >=41kV/mm, volume resistivity >=1.25 × 1015Ω cm, electric property
It is good；By 300 DEG C × 72h hot air aging, tensile strength reduces≤12%, and tensile elongation reduces≤13%, anti-air aging
Performance is good.Therefore, the ageing-resistant silicon rubber of the present invention can work long hours under the high temperature conditions.
2. present invention raw material each first is kneaded step by step in mixer, mediates step by step in kneader, between each raw material sufficiently
Crosslinking connects, and then further the sulfidization molding in two-roll mill, vulcanization are uniform.
Specific embodiment
Below with reference to some specific embodiments, the present invention is further described.
Embodiment 1
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber,
8 parts of perfluoroelastomers, 20 parts of fume colloidal silica, 3 parts of polyimides, 6 parts of aluminium hydroxide micro powder, 0.5 part of silane coupling agent, two
2 parts of methyldiethoxysilane, 1 part of hydroxy silicon oil, 0.5 part of Methyl Hydrogen Polysiloxane Fluid and 1 part of vulcanizing agent.
The molecular weight of the methyl vinyl silicone rubber is 450000-650000, contents of ethylene 0.13-0.22%.
The specific surface area of the fume colloidal silica is 150-250m3/ g, partial size 20-50nm.
The silane coupling agent is KH560.
The vulcanizing agent is bis 25 vulcanizing agent.
A kind of preparation method of ageing-resistant silastic material, comprising the following steps:
(1) by methyl vinyl silicone rubber, perfluoroelastomers, dimethyl diethoxysilane, hydroxy silicon oil and methyl hydrogen silicon
Oil is put into mixer, and 30min is kneaded under the conditions of 40 DEG C, and fume colloidal silica, polyimides, aluminium hydroxide micro powder is then added
And silane coupling agent, 15min is kneaded under the conditions of 100 DEG C；
(2) the mixing glue that step (1) obtains is put into kneader, 20min is mediated under the conditions of 180 DEG C, is then vacuumized, vacuum
Degree 0.03MPa, continue under the conditions of 200 DEG C of temperature to mediate 15min, dumping；
(3) kneading glue and vulcanizing agent that step (2) obtains are added in two-roll mill, 35 DEG C of roller temperature, roll spacing 5mm together, are mixed
Refine 2min, blanking, it is cooling to get.
Embodiment 2
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber,
9 parts of perfluoroelastomers, 23 parts of fume colloidal silica, 4 parts of polyimides, 8 parts of aluminium hydroxide micro powder, 0.6 part of silane coupling agent, two
3 parts of methyldiethoxysilane, 1.5 parts of hydroxy silicon oil, 0.8 part of Methyl Hydrogen Polysiloxane Fluid and 1.2 parts of vulcanizing agent.
The molecular weight of the methyl vinyl silicone rubber is 450000-650000, contents of ethylene 0.13-0.22%.
The specific surface area of the fume colloidal silica is 150-250m3/ g, partial size 20-50nm.
The silane coupling agent is KH570.
The vulcanizing agent is that peroxidating is bis- (2,4- dichloro-benzoyl).
A kind of preparation method of ageing-resistant silastic material, comprising the following steps:
(1) by methyl vinyl silicone rubber, perfluoroelastomers, dimethyl diethoxysilane, hydroxy silicon oil and methyl hydrogen silicon
Oil is put into mixer, and 25min is kneaded under the conditions of 45 DEG C, and fume colloidal silica, polyimides, aluminium hydroxide micro powder is then added
And silane coupling agent, 20min is kneaded under the conditions of 80 DEG C；
(2) the mixing glue that step (1) obtains is put into kneader, 25min is mediated under the conditions of 170 DEG C, is then vacuumized, vacuum
Degree 0.04MPa, continue under the conditions of 180 DEG C of temperature to mediate 15min, dumping；
(3) kneading glue and vulcanizing agent that step (2) obtains are added in two-roll mill, 40 DEG C of roller temperature, roll spacing 5mm together, are mixed
Refine 3min, blanking, it is cooling to get.
Embodiment 3
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber,
10 parts of perfluoroelastomers, 28 parts of fume colloidal silica, 5 parts of polyimides, 10 parts of aluminium hydroxide micro powder, 0.8 part of silane coupling agent,
4 parts of dimethyl diethoxysilane, 2 parts of hydroxy silicon oil, 1.0 parts of Methyl Hydrogen Polysiloxane Fluid and 1.5 parts of vulcanizing agent.
The molecular weight of the methyl vinyl silicone rubber is 450000-650000, contents of ethylene 0.13-0.22%.
The specific surface area of the fume colloidal silica is 150-250m3/ g, partial size 20-50nm.
The silane coupling agent is KH570.
The vulcanizing agent is bis 25 vulcanizing agent.
A kind of preparation method of ageing-resistant silastic material, comprising the following steps:
(1) by methyl vinyl silicone rubber, perfluoroelastomers, dimethyl diethoxysilane, hydroxy silicon oil and methyl hydrogen silicon
Oil is put into mixer, and 25min is kneaded under the conditions of 45 DEG C, and fume colloidal silica, polyimides, aluminium hydroxide micro powder is then added
And silane coupling agent, 15min is kneaded under the conditions of 100 DEG C；
(2) the mixing glue that step (1) obtains is put into kneader, 25min is mediated under the conditions of 200 DEG C, is then vacuumized, vacuum
Degree 0.05MPa, continue under the conditions of 180 DEG C of temperature to mediate 15min, dumping；
(3) kneading glue and vulcanizing agent that step (2) obtains are added in two-roll mill, 40 DEG C of roller temperature, roll spacing 4mm together, are mixed
Refine 3min, blanking, it is cooling to get.
Embodiment 4
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber,
12 parts of perfluoroelastomers, 32 parts of fume colloidal silica, 6 parts of polyimides, 11 parts of aluminium hydroxide micro powder, 0.8 part of silane coupling agent,
4 parts of dimethyl diethoxysilane, 2.5 parts of hydroxy silicon oil, 1.2 parts of Methyl Hydrogen Polysiloxane Fluid and 2 parts of vulcanizing agent.
The molecular weight of the methyl vinyl silicone rubber is 450000-650000, contents of ethylene 0.13-0.22%.
The specific surface area of the fume colloidal silica is 150-250m3/ g, partial size 20-50nm.
The silane coupling agent is KH570.
The vulcanizing agent is that peroxidating is bis- (2,4- dichloro-benzoyl).
A kind of preparation method of ageing-resistant silastic material, comprising the following steps:
(1) by methyl vinyl silicone rubber, perfluoroelastomers, dimethyl diethoxysilane, hydroxy silicon oil and methyl hydrogen silicon
Oil is put into mixer, and 30min is kneaded under the conditions of 50 DEG C, and fume colloidal silica, polyimides, aluminium hydroxide micro powder is then added
And silane coupling agent, 15min is kneaded under the conditions of 110 DEG C；
(2) the mixing glue that step (1) obtains is put into kneader, 30min is mediated under the conditions of 180 DEG C, is then vacuumized, vacuum
Degree 0.04MPa, continue under the conditions of 170 DEG C of temperature to mediate 20min, dumping；
(3) kneading glue and vulcanizing agent that step (2) obtains are added in two-roll mill, 35 DEG C of roller temperature, roll spacing 3mm together, are mixed
Refine 4min, blanking, it is cooling to get.
Embodiment 5
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber,
14 parts of perfluoroelastomers, 36 parts of fume colloidal silica, 7 parts of polyimides, 12 parts of aluminium hydroxide micro powder, 0.9 part of silane coupling agent,
5 parts of dimethyl diethoxysilane, 2.6 parts of hydroxy silicon oil, 1.3 parts of Methyl Hydrogen Polysiloxane Fluid and 2.5 parts of vulcanizing agent.
The molecular weight of the methyl vinyl silicone rubber is 450000-650000, contents of ethylene 0.13-0.22%.
The specific surface area of the fume colloidal silica is 150-250m3/ g, partial size 20-50nm.
The silane coupling agent is KH560.
The vulcanizing agent is that peroxidating is bis- (2,4- dichloro-benzoyl).
A kind of preparation method of ageing-resistant silastic material, comprising the following steps:
(1) by methyl vinyl silicone rubber, perfluoroelastomers, dimethyl diethoxysilane, hydroxy silicon oil and methyl hydrogen silicon
Oil is put into mixer, and 25min is kneaded under the conditions of 45 DEG C, and fume colloidal silica, polyimides, aluminium hydroxide micro powder is then added
And silane coupling agent, 10min is kneaded under the conditions of 120 DEG C；
(2) the mixing glue that step (1) obtains is put into kneader, 20min is mediated under the conditions of 190 DEG C, is then vacuumized, vacuum
Degree 0.05MPa, continue under the conditions of 180 DEG C of temperature to mediate 10min, dumping；
(3) kneading glue and vulcanizing agent that step (2) obtains are added in two-roll mill, 45 DEG C of roller temperature, roll spacing 5mm together, are mixed
Refine 5min, blanking, it is cooling to get.
Embodiment 6
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber,
15 parts of perfluoroelastomers, 40 parts of fume colloidal silica, 8 parts of polyimides, 12 parts of aluminium hydroxide micro powder, 1.0 parts of silane coupling agent,
6 parts of dimethyl diethoxysilane, 3 parts of hydroxy silicon oil, 1.5 parts of Methyl Hydrogen Polysiloxane Fluid and 3 parts of vulcanizing agent.
The molecular weight of the methyl vinyl silicone rubber is 450000-650000, contents of ethylene 0.13-0.22%.
The specific surface area of the fume colloidal silica is 150-250m3/ g, partial size 20-50nm.
The silane coupling agent is KH570.
The vulcanizing agent is bis 25 vulcanizing agent.
A kind of preparation method of ageing-resistant silastic material, comprising the following steps:
(1) by methyl vinyl silicone rubber, perfluoroelastomers, dimethyl diethoxysilane, hydroxy silicon oil and methyl hydrogen silicon
Oil is put into mixer, and 20min is kneaded under the conditions of 40 DEG C, and fume colloidal silica, polyimides, aluminium hydroxide micro powder is then added
And silane coupling agent, 20min is kneaded under the conditions of 100 DEG C；
(2) the mixing glue that step (1) obtains is put into kneader, 25min is mediated under the conditions of 170 DEG C, is then vacuumized, vacuum
Degree 0.06MPa, continue under the conditions of 180 DEG C of temperature to mediate 15min, dumping；
(3) kneading glue and vulcanizing agent that step (2) obtains are added in two-roll mill, 40 DEG C of roller temperature, roll spacing 4mm together, are mixed
Refine 3min, blanking, it is cooling to get.
Comparative example 1
The present embodiment is substantially the same manner as Example 3, and the same thing is not repeated, somewhat different:
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 110 parts of methyl vinyl silicone rubber,
28 parts of fume colloidal silica, 5 parts of polyimides, 10 parts of aluminium hydroxide micro powder, 0.8 part of silane coupling agent, dimethyl diethoxy
4 parts of silane, 2 parts of hydroxy silicon oil, 1.0 parts of Methyl Hydrogen Polysiloxane Fluid and 1.5 parts of vulcanizing agent.
Comparative example 2
The present embodiment is substantially the same manner as Example 3, and the same thing is not repeated, somewhat different:
A kind of ageing-resistant silicon rubber composite material, is made of the raw material of following parts by weight: 100 parts of methyl vinyl silicone rubber,
10 parts of perfluoroelastomers, 28 parts of fume colloidal silica, 5 parts of polyimides, 10 parts of aluminium hydroxide micro powder, 0.8 part of silane coupling agent,
4 parts of dimethyl diethoxysilane, 3 parts of Methyl Hydrogen Polysiloxane Fluid and 1.5 parts of vulcanizing agent.
The obtained silicon rubber composite material of 1-6 of the embodiment of the present invention and comparative example 1-2 is detected, wherein continuing
That (A) hardness is tested according to standard GB/T 531-2008, and tensile strength and tensile elongation are according to GB/T 528-
2009 are tested, and tearing strength is tested according to GB/T 529-2008, and breakdown strength is carried out according to GB/T 1695-2005
Test, volume resistivity tested according to GB/T1692-2008, heat-resistant air aging property according to GB/T 3512-2001 into
Row test, test result are shown in Table 1.
The ageing-resistant silastic material performance parameter of table 1 1-6 of the embodiment of the present invention and comparative example 1-2
As shown in Table 1, compared with Example 3, perfluoroelastomers are replaced with methyl vinyl silicone rubber by comparative example 1, are drawn
Stretching intensity, tensile elongation, tearing strength, breakdown strength and volume resistivity significantly reduces, by 300 DEG C × 72h hot-air
Aging, tensile strength and tensile elongation reduce obvious；Hydroxy silicon oil is replaced with Methyl Hydrogen Polysiloxane Fluid, silicon by comparative example 2
Rubber structure control is slightly worse, and properties are declined.
The ageing-resistant silicon rubber composite material of the present invention continues that hardness as 76-83 degree, and hardness is high；Tensile strength >=7.2MPa,
Tensile elongation >=453%, tearing strength >=38.5kN/m, high mechanical strength；Breakdown strength >=41kV/mm, volume resistivity >=
1.25×1015Ω cm, good electric property；By 300 DEG C × 72h hot air aging, tensile strength reduces≤12%, tensile elongation
Rate reduces≤13%, and anti-air aging performance is good.Therefore, the ageing-resistant silicon rubber of the present invention can work long hours under the high temperature conditions.
Claims (7)
1. a kind of ageing-resistant silicon rubber composite material, which is characterized in that be made of the raw material of following parts by weight: methyl ethylene
100 parts of silicon rubber, 8-15 parts of perfluoroelastomers, 20-40 parts of fume colloidal silica, 3-8 parts of polyimides, aluminium hydroxide micro powder 6-
12 parts, 0.5-1.0 parts of silane coupling agent, 2-6 parts of dimethyl diethoxysilane, 1-3 parts of hydroxy silicon oil, Methyl Hydrogen Polysiloxane Fluid
0.5-1.5 parts and vulcanizing agent 1-3 parts.
2. ageing-resistant silicon rubber composite material according to claim 1, which is characterized in that methyl vinyl silicone rubber 100
Part, 10 parts of perfluoroelastomers, 28 parts of fume colloidal silica, 5 parts of polyimides, 10 parts of aluminium hydroxide micro powder, silane coupling agent 0.8
Part, 4 parts of dimethyl diethoxysilane, 2 parts of hydroxy silicon oil, 1.0 parts of Methyl Hydrogen Polysiloxane Fluid and 1.5 parts of vulcanizing agent.
3. ageing-resistant silicon rubber composite material according to claim 1, which is characterized in that the methyl ethylene silicon rubber
The molecular weight of glue is 450000-650000, contents of ethylene 0.13-0.22%.
4. ageing-resistant silicon rubber composite material according to claim 1, which is characterized in that the fume colloidal silica
Specific surface area is 150-250m3/ g, partial size 20-50nm.
5. ageing-resistant silicon rubber composite material according to claim 1, which is characterized in that the silane coupling agent is
KH560 or KH570.
6. ageing-resistant silicon rubber composite material according to claim 1, which is characterized in that the vulcanizing agent is double 25
Vulcanizing agent or peroxidating are bis- (2,4 dichloro benzene formyl).
7. a kind of preparation method of ageing-resistant silastic material described in any one of claims 1-6, which is characterized in that including with
Lower step:
(1) by methyl vinyl silicone rubber, perfluoroelastomers, dimethyl diethoxysilane, hydroxy silicon oil and methyl hydrogen silicon
Oil is put into mixer, and 20-30min is kneaded under the conditions of 40-50 DEG C, and fume colloidal silica, polyimides, hydroxide is then added
Aluminium micro mist and silane coupling agent are kneaded 10-20min under the conditions of 80-120 DEG C；
(2) the mixing glue that step (1) obtains is put into kneader, 20-30min is mediated under the conditions of 170-200 DEG C, then taken out true
Vacuum degree 0.03-0.06MPa, sky continues under the conditions of 170-200 DEG C of temperature to mediate 10-20min, dumping；
(3) kneading glue and vulcanizing agent that step (2) obtains are added in two-roll mill together, 35-45 DEG C of roller temperature, roll spacing 3-
5mm, is kneaded 2-5min, blanking, it is cooling to get.
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| CN110218458A (en) * | 2019-06-25 | 2019-09-10 | 汤姆森电气有限公司 | A kind of transformer insulating shield and preparation method thereof |
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| CN116656129A (en) * | 2023-05-30 | 2023-08-29 | 杭州师范大学 | Silicon rubber compound with high storage stability and preparation process and application thereof |
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