Polyether polyol compositions and polyurethane foams formed therefrom
A technology of polyether polyol and composition, applied in the field of flame retardant-containing composition and polyurethane foam preparation, can solve the problems of deterioration of reactivity and foam performance, influence of stoichiometry of polyurethane spray system, equipment damage and the like
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Embodiment 1
[0086] Embodiment 1: the preparation of polyol
[0087] The ingredients and amounts listed in Table 1 were used to prepare polyether polyol compositions. To prepare the polyether polyol composition, the reactor temperature was set at 50°C and the reactor was charged with water, KOH and sucrose. The reactor temperature was raised to 100°C and the reactor pressure was vented to 5 psig. EO and PO were fed as a mixed feed at a rate sufficient to maintain a total reaction pressure of 30 to 45 psig. After complete addition of EO and PO, the reaction mixture was cooled to 80 °C and KOH was neutralized with 101% theoretical amount of 88% lactic acid in water. After neutralization, the reactor was charged with BHT and stirred for 30 minutes. Water is not removed from the polyol composition. The properties of the polyether polyol compositions are listed in Table 2.
[0088] Table 1
[0089] water (kg)
KOH 1 (kg)
sucrose 2 (kg)
EO 3 (kg)
...
Embodiment 2
[0103] Embodiment 2: Viscosity determination
[0104] A polyether polyol composition prepared as described in Example 1 was heated to 100°C and placed under increased vacuum to remove water. The vacuum was stopped and the pressure was restored to atmospheric using nitrogen and the samples were subjected to water and viscosity analysis (at 25 and 50°C) at several intervals. This process was repeated until the resulting polymer composition was too viscous to be removed from the stripping vessel. The results are shown in figure 1 and figure 2 middle. Viscosity was measured according to ASTM D4878 using a Brookfield RV-DVII viscometer with a small sample adapter and a #21 spindle.
Embodiment 3
[0105] Example 3: Foam formulation:
[0106] Using the polyether polyol composition described in Example 1 and using the ingredients and amounts shown in Table 3 (in % by weight, based on the total weight of the polyol formulation) to prepare a polyether polyol composition containing a flame retardant thing.
[0107] table 3
[0108] components
foam 1
bubble 2
The polyether polyol described in embodiment 1
37.00
34.00
Surfactant 1 12
7.25
7.25
water
12.00
11.5
Catalyst 1 13
1.00
1.50
Catalyst 2 14
2.00
5.00
Catalyst 3 15
2.00
2.00
Flame retardant 1 16
18.00
18.00
Flame retardant 2 17
20.00
20.00
Surfactant 2 18
0.75
0.75
[0109] 12 Tallowamine ethoxylate, which is commercially available from Huntsman Corporation's T-15.
[0110] 13 N,N,N'-trimethyl-N'-hydroxyethyl-bisaminoethyl ether, which is commercially available...
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