The method for producing a polyalkylene glycol of the present invention is a method for producing a polyalkylene glycol, including performing a polymerization reaction of an alkylene oxide with a composite metal catalyst, the polymerization reaction being performed in the presence of an organic solvent in an amount of 10 to 90 mass % based on the polyalkylene glycol to be produced.

The method for producing a polyalkylene glycol of the present invention is a method for producing a polyalkylene glycol, including performing a polymerization reaction of an alkylene oxide with a composite metal catalyst, the polymerization reaction being performed in the presence of an organic solvent in an amount of 10 to 90 mass % based on the polyalkylene glycol to be produced.

Provided are compositions comprising isotactic polyethers. Methods of making isotactic polyethers, and uses thereof are also disclosed. Also provided are bimetallic complexes that can be used as catalyst. Methods of making isotactic polyethers and bimetallic complexes and uses thereof are also disclosed. For example, a racemic bimetallic (salalen)CrCl polymerization catalyst was prepared and used alkyl diol, PO-oligomer triols, and aPPO and PCL diols as CSAs in order to produce α,ω-hydroxy telechelic iPPO. These telechelic polymers have controlled molecular weights and are semicrystalline. Amorphous α,ω-hydroxy telechelic PPO can also be produced by increasing the reaction temperature in conjunction with the use of CSAs.

Provided are compositions comprising isotactic polyethers. Methods of making isotactic polyethers, and uses thereof are also disclosed. Also provided are bimetallic complexes that can be used as catalyst. Methods of making isotactic polyethers and bimetallic complexes and uses thereof are also disclosed. For example, a racemic bimetallic (salalen)CrCl polymerization catalyst was prepared and used alkyl diol, PO-oligomer triols, and aPPO and PCL diols as CSAs in order to produce α,ω-hydroxy telechelic iPPO. These telechelic polymers have controlled molecular weights and are semicrystalline. Amorphous α,ω-hydroxy telechelic PPO can also be produced by increasing the reaction temperature in conjunction with the use of CSAs.

This invention relates to improved flexible foams prepared from polymer polyols and to a process for preparing these improved flexible foams.

This invention relates to improved flexible foams prepared from polymer polyols and to a process for preparing these improved flexible foams.

Embodiments include degradable polyethers comprising ester units from a cyclic ester or carbonate units from carbon dioxide incorporated into a poly(ethylene oxide) backbone or a multifunctional core of a degradable polyether star. Embodiments include methods of forming a degradable polyether comprising contacting an ethylene oxide monomer with a lactide monomer or carbon dioxide in the presence of an alkyl borane and an initiator. Embodiments include methods of forming degradable polyether stars comprising contacting a diepoxide monomer with carbon dioxide and/or a cyclic ester in the presence of an initiator and a first amount of an alkyl borane to form a multifunctional core comprising degradable carbonate linkages and/or degradable ester linkages, and contacting the multifunctional core with an ethylene oxide monomer in the presence of a second amount of an alkyl borane to form arms of a polyether attached to the degradable multifunctional core.

Embodiments include degradable polyethers comprising ester units from a cyclic ester or carbonate units from carbon dioxide incorporated into a poly(ethylene oxide) backbone or a multifunctional core of a degradable polyether star. Embodiments include methods of forming a degradable polyether comprising contacting an ethylene oxide monomer with a lactide monomer or carbon dioxide in the presence of an alkyl borane and an initiator. Embodiments include methods of forming degradable polyether stars comprising contacting a diepoxide monomer with carbon dioxide and/or a cyclic ester in the presence of an initiator and a first amount of an alkyl borane to form a multifunctional core comprising degradable carbonate linkages and/or degradable ester linkages, and contacting the multifunctional core with an ethylene oxide monomer in the presence of a second amount of an alkyl borane to form arms of a polyether attached to the degradable multifunctional core.

Copolymers of propylene oxide and ethylene oxide have an inner block that contains from 65-90 weight percent oxyethylene units and from 10 to 35 weight percent oxypropylene units. This block has a molecular weight of from 150 to 350. The copolymer has an outer block which contains at least 95 weight % oxypropylene units and from 0 to 5% oxyethylene units. The equivalent weight of the copolymer is from 800 to 2000. The copolymers are useful in making polyurethane foams that have unexpectedly high tensile and/or tear strengths.

Copolymers of propylene oxide and ethylene oxide have an inner block that contains from 65-90 weight percent oxyethylene units and from 10 to 35 weight percent oxypropylene units. This block has a molecular weight of from 150 to 350. The copolymer has an outer block which contains at least 95 weight % oxypropylene units and from 0 to 5% oxyethylene units. The equivalent weight of the copolymer is from 800 to 2000. The copolymers are useful in making polyurethane foams that have unexpectedly high tensile and/or tear strengths.