DOT 4. Nā hiʻohiʻona, haku mele, GOST
Nā mea
kiko kiko 4
He mau waiwai antioxidant maikaʻi loa ka wai o DOT-4 ma muli o ka haʻahaʻa haʻahaʻa o ka buffering agents (free amines) a me ka waiwai pH kiʻekiʻe. Loaʻa i nā wai DOT-1-DOT-4 nā esters waikawa boric a me ka polypropylene glycol ma ke kumu.
- ʻO nā esters waikawa Boric o ka polypropylene glycol me nā esters propylene glycol monosubstituted
Loaʻa iā lākou he 35-45% ma ke kaumaha. E mālama i nā hiʻohiʻona maikaʻi a me ka nui me ka nānā ʻole i ka hoʻololi ʻana o ka mahana a me ke kaomi. ʻO ka mea lubricant nui.
- ethyl carbitol
Hōʻike i ka ethyl ether monosubstituted o diethylene glycol (ethoxyethane). Hoʻohana ma ke ʻano he stabilizer a me ka solvent no nā esters. Maʻiʻo - 2-5%.
- Ionol
Pākuʻi Antioxidant. Kāohi i ka pau ʻana o nā borates i nā mahana kiʻekiʻe. ʻO ka hakina nui: 0,3–0,5%.
- ʻO Azimidobenzene a me ka morpholine
nā mea hoʻopaneʻe ʻino. Hāʻawi i ka hopena pH stabilizing. Maʻiʻo - 0,05–0,4%.
- plasticizers
ʻO Orthophthalic acid dimethyl ester, phosphoric acid esters i hoʻohana ʻia ma ke ʻano he palupalu. Hoʻomaʻamaʻa i ka deformability a hoʻonui i ka paʻa wela o nā ʻāpana polymer. Loaʻa iā lākou ka hana ma luna. ʻO ka mahele he 5-7%.
- Polypropylene glycol me ka awelika kaumaha o 500
I ka hui pū ʻana me boron ether polycondensates, hoʻomaikaʻi ia i nā waiwai lubricating o ka huahana. Maʻiʻo – 5%
- Tripropylene glycol N-butyl etera
Hoʻopaʻa i nā ʻāpana momona-ʻaila hydrophobic. Hoʻemi i ka ʻili o ka ʻili. Pākēneka - a hiki i 15%.
No laila, ʻo DOT-4 ka wai hoʻoheheʻe e loaʻa i kahi kiʻekiʻe o nā borates, propylene glycol polyesters, plasticizers, anti-corrosion a me nā mea hoʻohui antioxidant. Ma kahi pākēneka like, hāʻawi nā ʻāpana i nā waiwai hydromechanical a lubricating maikaʻi ʻoiai e mālama ana i nā ʻano hana o ka huahana ma kahi ākea ākea.
Nā koi GOST
Wahi a ka maʻamau interstate, ʻo DOT-4 kahi wai hoʻoheheʻe kiʻekiʻe no ka hāʻawi hou ʻana i nā ukana i kahi kaapuni mechanical paʻa. Ka waihoʻoluʻu - mai ka melemele ʻeleʻele a i ʻeleʻele. ʻAʻole ia e hana i ka sediment a ʻaʻole i loaʻa i nā haumia mechanical ʻike.
| Nāʻano | Norma |
| ʻO ka palena iki T wahi paila, °C | 230 |
| ʻO ka palena iki T ka hoʻoheheʻe ʻia no ka wai wai, °C | 155 |
| ʻO ke kūpaʻa hydrodynamic i nā mahana kiʻekiʻe | 3 |
| Hōʻike hydrogen | 7,5 - 11,5 |
| Kinematic viscosity ma 277K (40°C), St | 18 |
| Density ma lalo o nā kūlana maʻamau | ʻAʻole i kuhikuhi ʻia |
Ma ka hoʻokomo ʻana i nā polymers organosilicon (silicates) a me ka hoʻohaʻahaʻa ʻana i ka nui o nā esters acid boric, maʻalahi ka loaʻa ʻana o ka wai o ka papa DOT-5. Ma muli o kāna mau waiwai hana maikaʻi loa, kaulana ka ʻaila hydraulic o ka papa DOT-4 ma ka mākeke, a ke hoʻomaikaʻi mau nei kāna ʻano kemika.
