The Modification of Polyurethane Foams Using New Boroorganic Polyols (II) Polyurethane Foams from Boron-Modified Hydroxypropyl Urea Derivatives

Table 1

Polyol synthesis conditions and composition.

Synth.	Initial molar ratio*; BHPU : BA : PC	Amount of K2CO3; (mole/BHPU mole)	Temp.; (°C)	Reaction time; (h)	Formal molar ratio; BHPU : 𝑥 in product	HN; (mg KOH/g)	Polyol sign
1.	1 : 2 : 6	0.12	180	8	1 : 5.6	622 ± 21	PA1
2.	1 : 2 : 12	0.12	180	14	1 : 11.1	540 ± 18	PA2
3.	1 : 2 : 18	0.12	180	22	1 : 16.2	469 ± 19	PA3
4.	1 : 2 : 6	0.12	180	13.25	1 : 5.9	687 ± 22	PB1
5.	1 : 2 : 12	0.12	180	17	1 : 10.4	626 ± 20	PB2
6.	1 : 2 : 18	0.12	180	20	1 : 15.7	523 ± 17	PB3
7.	1 : 0 : 6	0.12	160	17	1 : 5.7	526 ± 18	PC1
8.	1 : 0 : 12	0.12	160	22	1 : 11.3	467 ± 15	PC2
9.	1 : 0 : 18	0.12	160	32	1 : 16.2	388 ± 12	PC3

𝑥: oxypropylene unit.
*In case of syntheses 1–6 EBU was used directly.