DOT 4. Halaye, abun da ke ciki, GOST
Dot ɗin abun ciki 4
Ruwan birki na DOT-4 yana da kyawawan kaddarorin antioxidant saboda ƙarancin abun ciki na abubuwan buffering (amines kyauta) da ƙimar pH mai girma. Liquids DOT-1-DOT-4 sun ƙunshi esters boric acid da polypropylene glycol a matsayin tushe.
- Boric acid esters na polypropylene glycol tare da monostus propylene glycol esters.
Sun ƙunshi 35-45% ta nauyi. Kula da halaye masu inganci da yawa ba tare da la'akari da canjin zafin jiki da matsa lamba ba. Babban bangaren mai.
- ethyl carbitol
Yana wakiltar ethyl ether mai maye gurbin diethylene glycol (ethoxyethane). Yana aiki azaman stabilizer da sauran ƙarfi ga esters. Abun ciki - 2-5%.
- Ionol
Antioxidant ƙari. Yana hana ƙonewar borates a yanayin zafi mai tsayi. Yawan juzu'i: 0,3-0,5%.
- Azimidobenzene da morpholine
masu hana lalata. Yana ba da sakamako mai daidaita pH. Abun ciki - 0,05-0,4%.
- masu yin filastik
Orthophthalic acid dimethyl ester, phosphoric acid esters ana amfani dashi azaman mai laushi. Sauƙaƙe nakasu da haɓaka kwanciyar hankali na raka'a polymer. Suna da aikin surface. Rabon shine 5-7%.
- Polypropylene glycol tare da matsakaicin nauyin 500
A hade tare da boron ether polycondensates, yana inganta lubricant na samfurin. Abun ciki - 5%
- N-butyl ester na tritropylene glycol
Yana ɗaure hydrophobic mai-mai barbashi. Yana rage tashin hankali. Kashi - har zuwa 15%.
Don haka, ruwan birki na DOT-4 ya haɗa da babban abun ciki na borates, propylene glycol polyesters, plasticizers, anti-corrosion and antioxidant additives. A cikin nau'in kashi mai kama da haka, abubuwan da aka gyara suna ba da kyawawan kaddarorin hydromechanical da lubricating yayin kiyaye halayen aiki na samfurin a cikin kewayon zafin jiki mai faɗi.
Abubuwan buƙatun GOST
Bisa ga ma'auni na tsaka-tsaki, DOT-4 babban ruwan birki ne mai tafasa don sake rarraba kaya a cikin rufaffiyar da'ira. Launi - daga kodadde rawaya zuwa launin ruwan kasa. Baya samar da ajiya kuma baya ƙunshe da ƙazantar injin gani.
| Характеристика | Daidaita |
| Gaggawa T wurin tafasa, ° C | 230 |
| Gaggawa T vaporization ga ruwa mai ruwa, °C | 155 |
| Zaman lafiyar Hydrodynamic a yanayin zafi mai tsayi | 3 |
| Hydrogen exponent | 7,5 - 11,5 |
| Kinematic danko a 277K (40°C), St | 18 |
| Yawa a ƙarƙashin daidaitattun yanayi | Ba a lissafta ba |
Ta hanyar gabatar da organosilicon polymers (silicates) da rage rabon esters na boric acid, yana da sauƙin samun ruwan birki na aji DOT-5. Saboda kyawawan kaddarorin sa, DOT-4 man hydraulic man shafawa ya shahara a kasuwa, kuma ana samun haɓaka abubuwan sinadaran sa koyaushe.
