CN102604272A - Fluororubber composite material for manufacturing sealing element and preparative technology - Google Patents

Abstract

The invention relates to a fluororubber composite material for manufacturing a sealing element and a preparative technology. The composite material is made from the following components in percentage by weights: 70-72wt% of fluororubber, 3.0-5.0 wt% of high-activity zinc oxide , 4-4.2 wt% of common magnesium hydrate, 2.4-2.8 wt% of calcium hydroxide, 13.8-16 wt% of spraying carbon black, 2.5-3 wt% of No.3 vulcanized agent, wherein the sum of the weight percentages of the components is 100wt%. The invention also relates to the preparative technology of the fluororubber composite material for manufacturing the sealing element. The sealing element made from the fluororubber composite material has good high temperature resistance performance; the service life of the sealing element is up to 3 years under the condition of 280 DEG C; and the service life of the sealing element is up to 100 hours under the condition of 320 DEG C. The fluororubber composite material has the characteristics of environmental protection, durability, safety and the like.

Description

A kind of manufacturing sealing member is with viton matrix material and preparation technology

Technical field

The present invention relates to a kind of viton matrix material and preparation technology, especially relate to a kind of manufacturing sealing member with viton matrix material and preparation technology.

Background technology

At present, how automobile, the used sealing member of engineering machinery are processed with viton, paracril or X 050 etc., and wherein, what resistance to elevated temperatures was best is viton.The manufacturing sealing member that existing a kind of resistance to elevated temperatures is had outstanding performance is used the viton matrix material, adopts following weight percent proportion raw material to process: viton 70%, high-active zinc oxide 15%; Calcium hydroxide 3.5%, BBP0.4%, bisphenol AF 2.61%; Acetylene 4.5%, palm wax 1%, phthalein dark green 3%.The resistance to elevated temperatures of this viton matrix material shows as: can be at life-time service below 250 ℃, and 250 ℃～300 ℃ short-terms are used.

But because the engine output of automobile, engineering machinery etc. increases, efficient improves and environmental requirement is more and more stricter and do not have the development trend of maintenanceization; With the resistance to elevated temperatures of material increasingly high requirement has been proposed to making sealing member; And the resistance to elevated temperatures of existing viton matrix material still still owes desirable, can not be satisfied with actual needs.

Summary of the invention

Technical problem to be solved by this invention is, provide a kind of can be at 280 ℃ of following life-time service, the manufacturing sealing member that 280 ℃～320 ℃ following short-terms are used is with viton matrix material and preparation technology.

The technical solution adopted for the present invention to solve the technical problems is: a kind of manufacturing sealing member is used the viton matrix material; Process by following component raw material: viton 70～72wt%, high-active zinc oxide 3.0～5.0wt%, ordinary hydrogen Natural manganese dioxide 4～4.2wt%; Calcium hydroxide 2.4～2.8wt%; Spray carbon black 13.8～16wt%, No. 3 vulcanizing agent 2.5～3wt%, each component sum is 100wt%.

Its preparation technology may further comprise the steps:

(1) gets the raw materials ready: take by weighing each component raw material by said each component raw material quality per distribution ratio;

(2) plasticate: the said viton of step (1) is placed mill, under roll spacing 0.5～1mm, thin logical 10～15 times, again roll spacing is put into 4～8mm, following sheet, wherein plasticating temperature behind roll-in 3～5min: 55～65 ℃ of preliminary rollers, 50～60 ℃ on back roller;

(3) mixing: as will to place Banbury mixer through the viton that step (2) is handled; Add high-active zinc oxide, ordinary hydrogen Natural manganese dioxide, calcium hydroxide, spray carbon black described in the step (1) then successively; Discharge behind mixing 1～2min, melting temperature are 45～60 ℃;

(4) sulfuration: after treating that step (3) gained rubber unvulcanizate is parked 23-25 hour, place mill again, add said No. 3 vulcanizing agents of step (1) then and vulcanize, thin logical roll spacing is 1～1.5mm, 50～60 ℃ of roller temperature, after thin logical 3～5 times under sheet for use;

(5) moulding: under 170～180 ℃ of pressure 19～21MPa, temperature,, use the vulcanizer moulding according to product requirement through 12～18min.

The present invention's viton composite product has the good temperature resistance ability: under 280 ℃ of conditions, can reach 3 years work-ing life, and under 320 ℃ of conditions, can reach 100 hours work-ing life.Can be used for making the resistant to elevated temperatures sealing member of needs, have environmental protection, characteristics such as durable, safe.

Embodiment

Below in conjunction with embodiment the present invention is described further.

Embodiment 1-4

Each component raw material quality per distribution ratio of embodiment 1-4 is seen table 1.

Table 1

The preparation technology of said embodiment 1-4:

(1) gets the raw materials ready: take by weighing each component raw material by said each component raw material quality per distribution ratio;

(2) plasticate: the said viton of step (1) is placed mill, under roll spacing 0.7mm, thin logical 12 times, again roll spacing is put into 6mm, following sheet, wherein plasticating temperature behind the roll-in 4min: 60 ℃ of preliminary rollers, 55 ℃ on back roller;

(3) mixing: as will to place Banbury mixer through the viton that step (2) is handled; Add high-active zinc oxide, ordinary hydrogen Natural manganese dioxide, calcium hydroxide, spray carbon black described in the step (1) then successively; Discharge behind the mixing 2min is because this process produces a large amount of heat, so need the whole process cooling; Make temperature keep about 55 ℃, to prevent incipient scorch;

(4) sulfuration: after treating that the gained rubber unvulcanizate is parked 24 hours, place mill again, add said No. 3 vulcanizing agents of step (1) then and vulcanize, thin logical roll spacing is 1mm, 55 ℃ of roller temperature scopes, after thin logical 4 times under sheet for use;

(5) moulding: under 175 ℃ of pressure 20MPa, temperature,, use the vulcanizer moulding according to product requirement through 15 min.

Show that through on probation said embodiment 1-4 gained viton matrix material all has resistance to elevated temperatures preferably.Sealing member with they are made under 280 ℃ of conditions, used 3 years, still had good seal performance; Under 320 ℃ of conditions, to use 100 hours, sealing property still meets request for utilization.

Claims (2)

1. a manufacturing sealing member is used the viton matrix material, it is characterized in that, is processed by following component raw material: viton 70～72wt%; High-active zinc oxide 3.0～5.0wt%; Ordinary hydrogen Natural manganese dioxide 4～4.2wt%, calcium hydroxide 2.4～2.8wt%, spray carbon black 13.8～16wt%; No. 3 vulcanizing agent 2.5～3wt%, each component sum is 100wt%.

2. a manufacturing sealing member as claimed in claim 1 is characterized in that with the preparation technology of viton matrix material, may further comprise the steps:

(1) gets the raw materials ready: take by weighing each component raw material by said each component raw material quality per distribution ratio;

(2) plasticate: the said viton of step (1) is placed mill, under roll spacing 0.5～1mm, thin logical 10～15 times, again roll spacing is put into 4～8mm, following sheet, wherein plasticating temperature behind roll-in 3～5min: 55～65 ℃ of preliminary rollers, 50～60 ℃ on back roller;

(3) mixing: as will to place Banbury mixer through the viton that step (2) is handled; Add high-active zinc oxide, ordinary hydrogen Natural manganese dioxide, calcium hydroxide, spray carbon black described in the step (1) then successively; Discharge behind mixing 1～2min, melting temperature are 45～60 ℃;

(4) sulfuration: after treating that step (3) gained rubber unvulcanizate is parked 23-25 hour, place mill again, add said No. 3 vulcanizing agents of step (1) then and vulcanize, thin logical roll spacing is 1～1.5mm, 50～60 ℃ of roller temperature, after thin logical 3～5 times under sheet for use;

(5) moulding: under 170～180 ℃ of pressure 19～21MPa, temperature,, use the vulcanizer moulding according to product requirement through 12～18min.