First, look for cracks. 1 Slowly bake in the lower part of the engine with a charcoal fire (avoid using a large fire). At the same time, open the tank and inject warm water into the tank (do not use water). Until the ice melts, discharge it from the drain valve, close the valve, fill the hot water, wipe the external dirt, and find the cracks; 2 The machine is frozen and the cracks are not likely to be on the outside. After the external inspection, they can be loosened. If the oil drains out of the oil sump drain bolts, the oil should be drained to remove the oil pan and carefully search for leaks.
Second, the measures. 1 After the crack is found out, it should be repaired, glued, or iron plated as appropriate; 2 If the radiator core leaks a small amount, both ends of the pipe core can be blocked and used. If there are more cracks, weld them before use
A polymer whose molecular backbone contains aliphatic esters. In other words, the parent nucleus R of the dihydroxyl compound HO -- R -- OH is polycarbonate of aliphatic group (CH2) M, (CH2)O(CH2), -- CH2 -- C(CH3)2 -- CH2 -- etc. It is characterized by low melting temperature, mostly below 60℃, and narrow melting range, greater solubility, low mechanical strength, hydrophilic, poor thermal stability, low glass transition temperature. Most aliphatic polycarbonate have low molecular weight and are mostly viscous liquid at room temperature or microcrystalline substance at low melting temperature. It can be prepared from aliphatic dihydroxyl compounds with dicarbonate or photogasification. Most of them have little industrial value, so their application is very limited.
Aliphatic Polycarbonates Apc,Rigid Bioplastics Aliphatic Polycarbonates Apc,Adhesives Aliphatic Polycarbonates Apc,Binders Aliphatic Polycarbonates Apc
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