Provided is a polyfunctional vinyl aromatic copolymer having reactivity and solubility that can be used for manufacturing a copolymer rubber and a copolymer rubber material having processability, strength and homogeneity obtained therefrom. The polyfunctional vinyl aromatic copolymer includes: 0.5 mol % or more and 40 mol % or less of a structural unit (a) derived from a divinyl aromatic compound and 60 mol % or more and 99.5 mol % or less of a structural unit (b) derived from a monovinyl aromatic compound, in which at least some of the structural units (a) are a crosslinked structural unit (a2) represented by the following Formula (2) and a vinyl-group-containing structural unit (a1) represented by the following Formula (1):

##STR00001##

in the formulas, R.sup.1's independently represent an aromatic hydrocarbon group having 6 to 30 carbon atoms.

Provided is a polyfunctional vinyl aromatic copolymer having reactivity and solubility that can be used for manufacturing a copolymer rubber and a copolymer rubber material having processability, strength and homogeneity obtained therefrom. The polyfunctional vinyl aromatic copolymer includes: 0.5 mol % or more and 40 mol % or less of a structural unit (a) derived from a divinyl aromatic compound and 60 mol % or more and 99.5 mol % or less of a structural unit (b) derived from a monovinyl aromatic compound, in which at least some of the structural units (a) are a crosslinked structural unit (a2) represented by the following Formula (2) and a vinyl-group-containing structural unit (a1) represented by the following Formula (1):

##STR00001##

in the formulas, R.sup.1's independently represent an aromatic hydrocarbon group having 6 to 30 carbon atoms.

This invention relates to a continuous process for making a polymer polyol, the polymer polyol produced according to the said process and its applications.

This invention relates to a continuous process for making a polymer polyol, the polymer polyol produced according to the said process and its applications.

Provided is a polyfunctional vinyl aromatic copolymer having reactivity and solubility that can be used for manufacturing a copolymer rubber and a copolymer rubber material having processability, strength and homogeneity obtained therefrom. The polyfunctional vinyl aromatic copolymer includes: 0.5 mol % or more and 40 mol % or less of a structural unit (a) derived from a divinyl aromatic compound and 60 mol % or more and 99.5 mol % or less of a structural unit (b) derived from a monovinyl aromatic compound, in which at least some of the structural units (a) are a crosslinked structural unit (a2) represented by the following Formula (2) and a vinyl-group-containing structural unit (a1) represented by the following Formula (1): ##STR00001##
in the formulas, R.sup.1's independently represent an aromatic hydrocarbon group having 6 to 30 carbon atoms.

Provided is a polyfunctional vinyl aromatic copolymer having reactivity and solubility that can be used for manufacturing a copolymer rubber and a copolymer rubber material having processability, strength and homogeneity obtained therefrom. The polyfunctional vinyl aromatic copolymer includes: 0.5 mol % or more and 40 mol % or less of a structural unit (a) derived from a divinyl aromatic compound and 60 mol % or more and 99.5 mol % or less of a structural unit (b) derived from a monovinyl aromatic compound, in which at least some of the structural units (a) are a crosslinked structural unit (a2) represented by the following Formula (2) and a vinyl-group-containing structural unit (a1) represented by the following Formula (1): ##STR00001##
in the formulas, R.sup.1's independently represent an aromatic hydrocarbon group having 6 to 30 carbon atoms.

A laminate has an olefin-aromatic vinyl compound-aromatic polyene copolymer and a metal foil. The number average molecular copolymer weight is between 5000 and 100000; the aromatic vinyl compound monomer is aromatic vinyl compound having between 8 and 20 carbon atoms, and the aromatic vinyl compound monomer unit content is between 10 and 60 mass %; the aromatic polyene is selected having between 5 and 20 carbon atoms and vinyl and/or vinylene groups in the molecule, the content derived from the aromatic polyene unit is between 1.5 and 20 pieces per number average molecular weight; and the olefin is selected having between 2 and 20 carbon atoms, being ethylene alone, or having a mass ratio of ?-olefin monomer components other than ethylene to an ethylene monomer component contained in the olefin, of 1/7 or less, and the total monomer units of the olefin, aromatic vinyl compound, and aromatic polyene is 100 mass %.

A laminate has an olefin-aromatic vinyl compound-aromatic polyene copolymer and a metal foil. The number average molecular copolymer weight is between 5000 and 100000; the aromatic vinyl compound monomer is aromatic vinyl compound having between 8 and 20 carbon atoms, and the aromatic vinyl compound monomer unit content is between 10 and 60 mass %; the aromatic polyene is selected having between 5 and 20 carbon atoms and vinyl and/or vinylene groups in the molecule, the content derived from the aromatic polyene unit is between 1.5 and 20 pieces per number average molecular weight; and the olefin is selected having between 2 and 20 carbon atoms, being ethylene alone, or having a mass ratio of ?-olefin monomer components other than ethylene to an ethylene monomer component contained in the olefin, of 1/7 or less, and the total monomer units of the olefin, aromatic vinyl compound, and aromatic polyene is 100 mass %.

A pH-responsive hybrid hydrogel, namely poly(Methacrylic acid-grafted-Ethylene Glycol) P(MAA-g-EG) cross-linked with Styrene-Butadiene-Styrene (SBS) polymer and photopolymerized by visible light. The resulting polymer turned out to have better integrities, high swelling ratios, pH-responsive and biocompatible character. Also the visible-light-induced synthesis of these pH-responsive composite wherein eosin Y is used as photoinitiator and triethanolamine is used as a co-initiator is also disclosed in the invention.

A pH-responsive hybrid hydrogel, namely poly(Methacrylic acid-grafted-Ethylene Glycol) P(MAA-g-EG) cross-linked with Styrene-Butadiene-Styrene (SBS) polymer and photopolymerized by visible light. The resulting polymer turned out to have better integrities, high swelling ratios, pH-responsive and biocompatible character. Also the visible-light-induced synthesis of these pH-responsive composite wherein eosin Y is used as photoinitiator and triethanolamine is used as a co-initiator is also disclosed in the invention.