Viscosity improvers are polymers with molecules that expand when they get hot.
粘度改良剂是聚合物分子，当他们得到扩大热点。
This underestimation will increase with a larger difference between the cold and hot oil viscosity and is also more relevant to early times (economics).
这种低估将增加以冷和热油黏度之间的更大差距， 并且与早期时期（经济评价）也相关。
The stability of hot paste viscosity decreased and the cold paste viscosity increased.
糊的热黏度稳定性降低，冷黏度稳定增加。
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