The present invention relates to a process for preparing cyclic carbonates of formula Ia or Ib or mixtures thereof (Ia) (Ib) comprising the process step: a) reacting a propargylic alcohol of formula II (II) with carbon dioxide in the presence of at least one transition metal catalyst TMC1, which comprises a transition metal selected from metals of groups 10, 11 and 12 of the periodic table of the elements according to IUPAC and at least one bulky ligand. ##STR00001##

The present invention relates to a process for preparing cyclic carbonates of formula Ia or Ib or mixtures thereof (Ia) (Ib) comprising the process step: a) reacting a propargylic alcohol of formula II (II) with carbon dioxide in the presence of at least one transition metal catalyst TMC1, which comprises a transition metal selected from metals of groups 10, 11 and 12 of the periodic table of the elements according to IUPAC and at least one bulky ligand. ##STR00001##

A scaffolding material for culturing a stem cell, which contains a synthetic resin, and has a storage elasticity at 100 C. of 1.010.sup.4 Pa or more and 1.010.sup.8 Pa or less, and a ratio between the storage elasticity at 25 C. and the storage elasticity at 100 C. ((storage elasticity at 25 C.)/(storage elasticity at 100 C.)) of 1.010.sup.1 or more and 1.010.sup.5 or less. The scaffolding material for stem cell culture has suitable hydrophilicity and strength, high fixation of stem cells after seeding, highly efficient cell proliferation, and excellent scratch resistance.

A scaffolding material for culturing a stem cell, which contains a synthetic resin, and has a storage elasticity at 100 C. of 1.010.sup.4 Pa or more and 1.010.sup.8 Pa or less, and a ratio between the storage elasticity at 25 C. and the storage elasticity at 100 C. ((storage elasticity at 25 C.)/(storage elasticity at 100 C.)) of 1.010.sup.1 or more and 1.010.sup.5 or less. The scaffolding material for stem cell culture has suitable hydrophilicity and strength, high fixation of stem cells after seeding, highly efficient cell proliferation, and excellent scratch resistance.

The present invention relates to a process for preparing cyclic carbonates of formula Ia or Ib or mixtures thereof (Ia) (Ib) comprising the process step: a) reacting a propargylic alcohol of formula II (II) with carbon dioxide in the presence of at least one transition metal catalyst TMC1, which comprises a transition metal selected from metals of groups 10, 11 and 12 of the periodic table of the elements according to IUPAC and at least one bulky ligand.

##STR00001##

The present invention relates to a process for preparing cyclic carbonates of formula Ia or Ib or mixtures thereof (Ia) (Ib) comprising the process step: a) reacting a propargylic alcohol of formula II (II) with carbon dioxide in the presence of at least one transition metal catalyst TMC1, which comprises a transition metal selected from metals of groups 10, 11 and 12 of the periodic table of the elements according to IUPAC and at least one bulky ligand.

##STR00001##

A scaffolding material for culturing a stem cell, which contains a synthetic resin, and has a nitrogen content of the synthetic resin of 0.1% by mass or more and 10% by mass or less. According to the scaffolding material for stem cell culture, the scaffolding material can have suitable hydrophilicity and strength, high fixation of stem cells after seeding, and highly efficient cell proliferation.

A scaffolding material for stem cell culture, which has a dispersion component .sup.d of the surface free energy of 24.5 or more and less than 45.0, and a dipole component .sup.p of the surface free energy of 1 or more and less than 20.0. According to the scaffolding material for stem cell culture, the scaffolding material can have suitable hydrophilicity and strength, high fixation of stem cells after seeding, and highly efficient cell proliferation.

A polymer to increase the primary detergent power of detergents and cleaning products, in particular with respect to soiling containing oil and/or grease. This is achieved essentially by the incorporation of polymers obtainable by polymerization of compounds of the general formula (I), in which R.sup.1, R.sup.2 and R.sup.3, independently of one another, represent H or an alkyl group having 1 to 3 C atoms with select ,-monoethylenically unsaturated monomers.

A polymer to increase the primary detergent power of detergents and cleaning products, in particular with respect to soiling containing oil and/or grease. This is achieved essentially by the incorporation of polymers obtainable by polymerization of compounds of the general formula (I), in which R.sup.1, R.sup.2 and R.sup.3, independently of one another, represent H or an alkyl group having 1 to 3 C atoms with select ,-monoethylenically unsaturated monomers.