Claims
- 1. A novel polyoxypropylene-polyol or a polyoxyethylene-polyoxypropylene-polyol containing up to 30% by weight, based on the weight of the alkylene oxide units, of oxyethylene units bonded within the chain, containing secondary hydroxyl groups, having a functionality of from 3.5 to 4.3, a hydroxyl number of from 350 to 650 and a viscosity of from 500 to 2,500 mPa.multidot.s at 23.degree. C., and prepared by anionic polymerization of 1,2-propylene oxide or ethylene oxide and 1,2-propylene oxide at elevated temperature onto an initiator molecule mixture containing, based on the total weight of the initiator molecule mixture,
- a1) from 40 to 80% by weight of a hexanetetrol,
- a2) from 1 to 30% by weight of a hexanetriol,
- a3) from 0 to 35% by weight of a glycerol and
- a4) from 0 to 15% by weight of sorbitol or mannitol, or a mixture thereof.
- 2. A novel polyoxypropylene-polyol or polyoxyethylene-polyoxypropylene-polyol as claimed in claim 1, wherein the initiator molecule mixture consists of, based on the total weight of the initiator molecule mixture,
- a1) from 40 to 80% by weight of a hexanetetrol,
- a2) from 1 to 30% by weight of a hexanetriol,
- a3) from 0 to 35% by weight of glycerol and
- a4) from 0 to 15% by weight of sorbitol or mannitol, or a mixture thereof.
- 3. A mixture of polyhydroxyl compounds for preparing polyisocyanate polyaddition products, which comprises, based on the total weight of the polyhydroxyl compounds (a),
- ai) at least 10% by weight of at least one polyoxypropylene-polyol or at least one polyoxyethylene-polyoxypropylene-polyol containing up to 30% by weight, based on the weight of the alkylene oxide units, of oxyethylene units bonded within the chain, containing secondary hydroxyl groups, having a functionality of from 3.5 to 4.3, a hydroxyl number of from 350 to 650 and a viscosity of from 500 to 2,500 mPa.multidot.s at 23.degree. C., and prepared by anionic polymerization of 1,2-propylene oxide or ethylene oxide and 1,2-propylene oxide onto an initiator molecule mixture containing, based on the total weight of the initiator molecule mixture,
- a1) from 40 to 80% by weight of a hexanetetrol,
- a2) from 1 to 30% by weight of a hexanetriol,
- a3) from 0 to 35% by weight of glycerol and
- a4) from 0 to 15% by weight of sorbitol or mannitol, or a mixture thereof,
- and
- aii) up to 90% by weight of at least one polyoxyalkylene-polyol, different from (ai) having a functionality of from 2 to 8 and a hydroxyl number of from 80 to 850.
Parent Case Info
This is a division, of application Ser. No. 07/694,621 filed May 2, 1991, now U.S. Pat. No. 5,192,813.
US Referenced Citations (4)
Number |
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Kind |
5030550 |
Kawabe et al. |
Jul 1991 |
|
5192813 |
Henn et al. |
Mar 1993 |
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5198532 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
694621 |
May 1991 |
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