CN102504424A - Butyl rubber composition for flexible tube of automobile air conditioner - Google Patents
Butyl rubber composition for flexible tube of automobile air conditioner Download PDFInfo
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- CN102504424A CN102504424A CN2011103254805A CN201110325480A CN102504424A CN 102504424 A CN102504424 A CN 102504424A CN 2011103254805 A CN2011103254805 A CN 2011103254805A CN 201110325480 A CN201110325480 A CN 201110325480A CN 102504424 A CN102504424 A CN 102504424A
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- butyl rubber
- flexible tube
- rubber composition
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Abstract
The invention relates to a butyl rubber composition for a flexible tube of an automobile air conditioner, comprising the following components: butyl rubber, rapidly pressed carbon black, paraffin oil SUNPAR2280, resorcinol, hexamethylenetetramine, white carbon black, flow promoting agent WB42, vulcanization resin SP-1056, stearic acid and zinc oxide. The flexible tube of the automobile air conditioner produced with the butyl rubber composition has low permeability and good resistance against refrigerant R-134a, and good damping property (i.e. vibration absorbability). The flexible tube has the following performance: the permeability of the flexible tube to refrigerant R-134a proved by a 240-hour permeability test is 1.1 g/day, the flexible tube has no crack on neither inner surface nor outer surface against the refrigerant R134a (125 DEG C for 96 hours and -30-125 DEG C for 48 hours), after aging for a long time (720 hours at 120 DEG C) and after going through a high-temperature and low-temperature vibration test, and the flexible tube has no leakage after being pulsed for 150,000 times.
Description
Technical field
The present invention relates to a kind of butyl rubber composition that is used for automotive air conditioning hose, utilize this type of butyl rubber composition to do the prepared automotive air conditioning hose of inner glue layer.
Background technology
Rubber hose is used to carry gaseous state and liquid refrigerant in automotive air-conditioning system, and the refrigeration agent that present automotive industry is selected for use is Tetrafluoroethane (being called for short R-134a).Topmost parts are compressor, condensing surface, liquid trap, vaporizer and expansion valve in the automotive air-conditioning system.Metal tube and rubber hose link together all these parts.The gasiform refrigeration agent gets into condensing surface through compressor compresses liquefaction, flows to expansion valve from condensing surface again, evaporates there and by the thermodynamic principles heat dissipation, and refrigeration agent is from the surrounding environment heat absorption and vaporizer, evaporate, and turns back in the compressor again then.This working cycle repeatedly requires rubber hose to low perviousness of refrigeration agent R-134a and excellent anti-patience.Good anti-dynamic stress, anti-vibration performance, low noise.The automotive air-conditioning system rubber hose is divided into two kinds substantially, and a kind of is high pressure hose, and another kind is a low-pressure hose.The temperature and pressure of the refrigeration agent that high pressure hose is carried is high, institute so that refrigeration agent easily in the rubber hose to exosmosis, the key property that requires rubber hose to have is the low-permeability and excellent anti-patience of refrigeration agent; The refrigerant temperature and the pressure ratio of low pressure hose internal flow are lower; The possibility of refrigeration agent infiltration is lower; Anti-patience requirement to refrigeration agent is very high, but the low pressure rubber hose directly promptly is connected with the space of car body with vaporizer, so require the low pressure rubber hose to have good absorbing performance.Many automotive air conditioning hoses manufacturer selects the high pressure rubber hose internal layer for use osmotic-pressure-tolerant strong polyamide resin; Low pressure rubber hose internal layer does not adopt the polyamide material of the high and easy transmitting vibrations of rigidity; But select rubber for use, purpose is to keep flexibility and improve the absorbing performance.No matter present most of automotive air conditioning hose is that high pressure rubber hose or low pressure rubber hose all adopt identical structure; It is its structure (from inside to outside) polyamide resin pervious course/middle rubber layer/trevira enhancement layer/outer rubber layer; This structure is fit to high pressure rubber hose, is (from inside to outside) inner rubber layer/trevira enhancement layer/outer rubber layer for its only structure of low pressure rubber hose.This structural requirement internal layer material of main part is a rubber.Need carry out special formulation design, to satisfy low pressure rubber hose inner glue layer to refrigerant R134a low-permeability and excellent anti-patience, the absorbing performance that whole rubber hose is good.Butyl rubber, Chlorobutyl, brominated butyl rubber commonly used has the anti-permeability remarkable to refrigeration agent R-134a, and to the high damping characteristic and the low temperature resistant and high temperature anti ageing property of low-frequency vibration, and price is low.Chlorobutyl, brominated butyl rubber increase the polarity of molecule owing to introduced chlorine atom, bromine atoms in the molecule, but the anti-patience of refrigeration agent is reduced greatly, not too are fit to do the hose lining of air conditioning hose, and are fit to do mesogloea.It is good to the anti-patience of refrigeration agent that butyl rubber belongs to non-polar rubber, is fit to do the hose lining of air conditioning hose.But the butyl rubber vulcanization rate is slow, autohension and mutual viscosity are poor; Need butyl rubber is carried out special formulation design, select for use butyl rubber to do excellent anti patience and the whole rubber hose good absorbing performance of air conditioning hose inner glue layer refrigerant R134a to satisfy.
Summary of the invention
In view of above-mentioned situation, the object of the invention promptly is to provide a kind of butyl rubber composition, and it can be used for making the inner glue layer to the air conditioning hose of the excellent anti-patience of the R-134a of anti-the refrigeration agent.Another object of the present invention is to provide this type of butyl rubber composition is used for the prepared air conditioning hose of inner glue layer, and this air conditioning hose has good absorbing performance.
In order to address the above problem; Deep research and discovery have been carried out; Can make through using a kind of butyl rubber composition excellent anti-patience of the R-134a of anti-refrigeration agent the and air conditioning hose with abundant physical property (like low-permeability, damping property, low noise), this butyl rubber composition component and mass fraction are following:
Rubber hose structure of the present invention is inner glue layer, trevira enhancement layer, outer glue-line from inside to outside.
Specify butyl rubber composition of the present invention.
Butyl rubber preferred, butyl rubber are iso-butylenes and the multipolymer of a small amount of isoprene, belong to nonpolar saturated rubber.Make butyl rubber have the low-permeability of air, gas and water vapor owing to contain macromolecular saturated polyisobutene structure in the molecule, good damping and amortization is an absorbed oscillation property.Butyl rubber commonly used has different mooney viscosities, and ML is for example arranged
1+4 100 ℃Be 41～50,51～60,61～70,71～80, the preferred mooney viscosity ML of the present invention
1+4100 ℃ is 71～80 butyl rubber, and this type of butyl rubber tensile strength is high, and it is good to stretch performance surely, and compression set is little, and good to the anti-patience of pharmaceutical chemicals, absorbed oscillation property is good.
The fast carbon black that extrudes is strengthening agent, and this particle size carbon black is big, good dispersivity, and compression set is little, and extruded velocity is fast.
Yellow Protopet 2A is softening agent, trade mark SUNPAR2280, and U.S. Sun Oil Company product has outstanding high temperature resistance, and low extractable is that other Yellow Protopet 2A is irreplaceable.
Resorcinol, vulkacit H, WHITE CARBON BLACK are combined together, and can increase the bounding force of sizing material, can improve the bond strength of butyl rubber and trevira effectively.
Flow promotor WB42, the mixture of chemical ingredients derivative of fatty acid, German Struktol Company products can be improved fillers dispersed property and flowability significantly in butyl rubber, improve extruded velocity.Also can adopt other similar flow promotor, but effect is a bit weaker.
Sulfuration resin SP-1056 is vulcanizing agent, chemical name bromination hydroxymethyl alkyl resol, U.S. Sheng Laike specialization worker Company products can the high-speed vulcanization butyl rubber, can improve the butyl rubber vulcanization rate slow, and can improve and the bonding force of trevira.Other similar products like does not reach identical effect.
Triple Pressed Stearic Acid, zinc oxide, vulcanization aid, the cocuring agent of butyl rubber resin cure system can improve vulcanization rate, improves the coke burning performance and the processing safety of sizing material.
Effect of the present invention; Because low-permeability that butyl rubber itself has a R-134a of anti-refrigeration agent the and excellent anti-patience, good damping and amortization is an absorbed oscillation property, but that its shortcoming is a vulcanization rate is slow; Self-adhesion and mutual viscosity are poor; Through prescription reasonable in design, wherein mainly add Resorcinol, vulkacit H, WHITE CARBON BLACK, sulfuration resin SP-1056 has overcome this defective; Can prepare the low-permeability of the R-134a of anti-refrigeration agent the and the butyl rubber composition of the anti-patience of excellence, good damping and amortization is the air conditioning hose of absorbed oscillation property.
The preparation method of butyl rubber composition of the present invention and air conditioning hose, the preparation method of flexible pipe adopts the existing processes preparation method:
The structure of flexible pipe is inner glue layer, trevira enhancement layer, outer glue-line from inside to outside.Inner glue layer is selected butyl rubber composition of the present invention for use, and outer glue-line can be selected most of air conditioning hoses EPDM rubber unvulcanizate commonly used for use.Enhancement layer is selected trevira for use.
The preparation of flexible pipe:
1, refining glue: prepare hose lining, outer layer glue rubber unvulcanizate respectively.
2, extrude
1. single screw rod nylon T type forcing machine cored bar is extruded inner glue layer;
2. weave enhancement layer, adopt the trevira line;
3. single screw rod T type forcing machine is extruded outer glue-line;
4. single screw rod T plastic forcing machine is extruded outer plastic TPX layer.
3, sulfuration: flexible pipe is put into the steam vulcanization kettle cure, 170 ℃ * 50min of curing parameter.
Embodiment
(blend unit: parts by weight)
Need to prove that in the above-mentioned raw materials, summary of the invention is ben to be the trade mark product of mentioned production firm, here repeated description not.
Can find out by the foregoing description; Select butyl rubber for use; Add Resorcinol, vulkacit H, WHITE CARBON BLACK; The butyl rubber composition of sulfuration resin SP-1056 and other relevant Synergist S-421 95 gained can realize preparing the low-permeability of the R-134a of anti-refrigeration agent the and the anti-patience of excellence, and good damping and amortization is the air conditioning hose hose lining and the flexible pipe of absorbed oscillation property.
The hose lining performance of flexible pipe:
Heat-proof aging (150 ℃ of * 70h) elongation change is-9%, compression set (150 ℃ * 22h) be 45%, anti-refrigerant R134a volume change (125 ℃ * 96h ,-30 ℃～125 ℃ * 48h) be 31%.
The performance of flexible pipe:
240h permeability test refrigerant R134a rate of permeation 1.1g/ days; (125 ℃ * 96h of anti-refrigerant R134as;-30 ℃～125 ℃ * 48h) the inside and outside surperficial flawless of flexible pipe; It is long-time aging that (120 ℃ * 720h) the inside and outside surperficial flawless of flexible pipe, the inside and outside surperficial flawless of 1 high low temperature VT rear hose does not have behind 150000 subpulses and leaks.
Claims (2)
1. butyl rubber composition that is used for automotive air conditioning hose is characterized in that component and mass fraction are following:
100 parts of butyl rubbers,
Fast 70～80 parts of the carbon blacks that extrude,
6～10 parts of Yellow Protopet 2A SUNPAR2280,
2.5～3.5 parts of Resorcinols,
1.5～2.5 parts of vulkacit Hs,
10～20 parts of WHITE CARBON BLACKs,
1.0～2.0 parts of flow promotor WB42,
7.0～9.0 parts of sulfuration resin SP-1056,
0.5～1.5 part of Triple Pressed Stearic Acid,
4.0～6.0 parts in zinc oxide.
2. adopt the butyl rubber composition that is used for automotive air conditioning hose of claim 1, it is characterized in that butyl rubber composition is used for the inner glue layer of automotive air conditioning hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103254805A CN102504424A (en) | 2011-10-24 | 2011-10-24 | Butyl rubber composition for flexible tube of automobile air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103254805A CN102504424A (en) | 2011-10-24 | 2011-10-24 | Butyl rubber composition for flexible tube of automobile air conditioner |
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| CN102504424A true CN102504424A (en) | 2012-06-20 |
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| CN2011103254805A Pending CN102504424A (en) | 2011-10-24 | 2011-10-24 | Butyl rubber composition for flexible tube of automobile air conditioner |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104710802A (en) * | 2015-04-03 | 2015-06-17 | 浙江巍翔科技集团有限公司 | Rubber antifatigue additive and preparation method thereof |
| CN106566095A (en) * | 2016-10-28 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Butyl rubber for steam hose |
| CN106751048A (en) * | 2016-12-12 | 2017-05-31 | 芜湖集拓橡胶技术有限公司 | A kind of butyl rubber air conditioner condensation water pipe formula |
| CN109027448A (en) * | 2018-08-31 | 2018-12-18 | 天津鹏翎集团股份有限公司 | R744 room temperature air conditioning hose and preparation method thereof |
| WO2020026977A1 (en) * | 2018-08-01 | 2020-02-06 | 横浜ゴム株式会社 | Rubber composition for hose, and hose |
| WO2023130708A1 (en) * | 2022-01-06 | 2023-07-13 | 宁国中奕橡塑有限公司 | Rubber for compressor driving disc of automobile air conditioner and preparation method therefor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403732A (en) * | 2001-09-04 | 2003-03-19 | 东海橡胶工业株式会社 | Hose |
| CN101712781A (en) * | 2009-12-03 | 2010-05-26 | 天津鹏翎胶管股份有限公司 | Formula of middle rubber layer of hyposmosis air-conditioning rubber pipe |
-
2011
- 2011-10-24 CN CN2011103254805A patent/CN102504424A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1403732A (en) * | 2001-09-04 | 2003-03-19 | 东海橡胶工业株式会社 | Hose |
| CN101712781A (en) * | 2009-12-03 | 2010-05-26 | 天津鹏翎胶管股份有限公司 | Formula of middle rubber layer of hyposmosis air-conditioning rubber pipe |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104710802A (en) * | 2015-04-03 | 2015-06-17 | 浙江巍翔科技集团有限公司 | Rubber antifatigue additive and preparation method thereof |
| CN106566095A (en) * | 2016-10-28 | 2017-04-19 | 无锡市永兴金属软管有限公司 | Butyl rubber for steam hose |
| CN106751048A (en) * | 2016-12-12 | 2017-05-31 | 芜湖集拓橡胶技术有限公司 | A kind of butyl rubber air conditioner condensation water pipe formula |
| WO2020026977A1 (en) * | 2018-08-01 | 2020-02-06 | 横浜ゴム株式会社 | Rubber composition for hose, and hose |
| JP2020019895A (en) * | 2018-08-01 | 2020-02-06 | 横浜ゴム株式会社 | Hose rubber composition and hose |
| CN109027448A (en) * | 2018-08-31 | 2018-12-18 | 天津鹏翎集团股份有限公司 | R744 room temperature air conditioning hose and preparation method thereof |
| WO2023130708A1 (en) * | 2022-01-06 | 2023-07-13 | 宁国中奕橡塑有限公司 | Rubber for compressor driving disc of automobile air conditioner and preparation method therefor |
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Application publication date: 20120620 |