A vapor pressure reducing agent for polyurethane foam, comprising at least one compound represented by the following formula (1):
wherein R
1
, R
2
and R
3
represent a straight-chain alkyl group or branched-chain alkyl group having 2 to 5 carbon atoms, R
1
, R
2
and R
3
may be the same or different, with the proviso that the compound wherein R
1
, R
2
and R
3
are all ethyl groups is excluded, the compound having a total acid content of 650 mg KOH or less as measured in accordance with MIL H-19457; and a premix composition for producing polyurethane foam, comprising a polyol, a curing catalyst, 1,1,1,3,3-pentafluoropropane, a foaming stabilizer, and the vapor pressure reducing agent described above.
一种用于聚
氨酯泡沫塑料的蒸汽减压器,由至少一种下式 (1) 所代表的化合物组成:
其中 R
1
, R
2
和 R
3
代表具有 2 至 5 个碳原子的直链烷基或支链烷基,R
1
, R
2
和 R
3
可以相同,也可以不同,但前提条件是化合物中的 R
1
, R
2
和 R
3
根据 MIL H-19457 测量,该化合物的总酸含量为 650 毫克 KOH 或更少;以及一种用于生产聚
氨酯泡沫的预混组合物,包括多元醇、固化催化剂、
1,1,1,3,3-五氟丙烷、发泡稳定剂和上述蒸汽减压器。