The present invention relates to a super absorbent polymer exhibiting more improved liquid permeability while maintaining excellent absorption performance, and a method for producing the same. The super absorbent polymer comprises: a base polymer powder comprising a first cross-linked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; and a surface crosslinked layer formed on the base polymer powder and including a second cross-linked polymer in which the first crosslinked polymer is further cross-linked through an alkylene carbonate having two to five carbon atoms. The super absorbent polymer satisfies predetermined physical properties.

The present invention relates to a super absorbent polymer exhibiting more improved liquid permeability while maintaining excellent absorption performance, and a method for producing the same. The super absorbent polymer comprises: a base polymer powder comprising a first cross-linked polymer of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups; and a surface crosslinked layer formed on the base polymer powder and including a second cross-linked polymer in which the first crosslinked polymer is further cross-linked through an alkylene carbonate having two to five carbon atoms. The super absorbent polymer satisfies predetermined physical properties.

The present invention provides a composition capable of reducing adhesion of biofilms and therefore useful for producing a molded body.

The composition comprises at least one resin (A) selected from the group consisting of thermoplastic resins and thermosetting resins, and a quorum sensing inhibitor (B), and is configured such that a common logarithm log S of solubility of the quorum sensing inhibitor (B) in water of 25 C. is less than 0.1, and Rai is greater than 3.2 MPa.sup.1/2, provided that Rai is a distance between a Hansen solubility parameter of the at least one resin (A) selected from the group consisting of thermoplastic resins and thermosetting resins and a Hansen solubility parameter of the quorum sensing inhibitor (B).

The invention pertains to certain fluoroelastomer compositions including given amounts of certain aromatic polyamide-imide polymers, having ability to adhere upon curing to various substrates, to a process for their manufacture, to a method for fabricating shaped articles comprising curing the said compositions, to cured articles therefrom, and to assemblies including a substrate and said cured articles.

The invention pertains to certain fluoroelastomer compositions including given amounts of certain aromatic polyamide-imide polymers, having ability to adhere upon curing to various substrates, to a process for their manufacture, to a method for fabricating shaped articles comprising curing the said compositions, to cured articles therefrom, and to assemblies including a substrate and said cured articles.

A ink-jet ink composition according to the present disclosure contains a colorant, water, a 1,2-alkanediol, and a water-soluble 1,3-dioxolane compound represented by the following formula:

##STR00001##

where R.sup.1 and R.sup.2 are independently selected from linear or branched alkyl groups containing one to four carbon atoms and R.sup.3 is a hydrogen atom or at least one selected from the group consisting of an ethylene oxide adduct, a propylene oxide adduct, and a butylene oxide adduct and is terminated with a hydrogen atom.

The present invention relates to a method for preparing a super absorbent polymer exhibiting improved liquid permeability, gel strength, absorption rate and the like while maintaining excellent absorption performance. The method for preparing the super absorbent polymer comprises the steps of: carrying out a crosslinking polymerization of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups in the presence of an internal crosslinking agent to form a hydrogel polymer including a cross-linked polymer; drying, pulverizing, and classifying the hydrogel polymer to form a base polymer powder; and surface-crosslinking the base polymer powder by using a surface crosslinking liquid containing a surface crosslinking agent of an alkylene carbonate having 2 to 5 carbon atoms, in the presence of hydrophobic silica particles having a water-contact angle of more than 10 and 150 or less and hydrophilic silica particles having a water-contact angle of 10 or less.

The present invention relates to a method for preparing a super absorbent polymer exhibiting improved liquid permeability, gel strength, absorption rate and the like while maintaining excellent absorption performance. The method for preparing the super absorbent polymer comprises the steps of: carrying out a crosslinking polymerization of a water-soluble ethylenically unsaturated monomer having at least partially neutralized acidic groups in the presence of an internal crosslinking agent to form a hydrogel polymer including a cross-linked polymer; drying, pulverizing, and classifying the hydrogel polymer to form a base polymer powder; and surface-crosslinking the base polymer powder by using a surface crosslinking liquid containing a surface crosslinking agent of an alkylene carbonate having 2 to 5 carbon atoms, in the presence of hydrophobic silica particles having a water-contact angle of more than 10 and 150 or less and hydrophilic silica particles having a water-contact angle of 10 or less.

A polyurethane urea composition and a preparation method thereof are provided. The method includes mixing and reacting an urea and an amine compound to obtain a polyurea oligomer, and mixing and reacting the polyurea oligomer and a cyclic carbonate compound to obtain a polyurethane urea composition having a repeating unit represented by formula I:
R.sup.2U.sup.2U.sup.1U.sup.2R.sup.2, wherein [formula I] U.sup.1 is ##STR00001## a is an integer of 1 to 10000, each U.sup.2 is independently ##STR00002## each R.sup.1 is independently a C1 to C20 alkylene group, a C3 to C20 cycloalkylene group, a C8 to C20 alkylarylene group, a polyether group having a weight-average molecular weight of 100 g/mol to 10000 g/mol, or a combination thereof, and each R.sup.2 is independently an aliphatic group, a cycloaliphatic group, an aromatic group substituted by an alkyl or an unsubstituted aromatic group, an oligo polyether group, an oligo polyester group, or a combination thereof.

A polyurethane urea composition and a preparation method thereof are provided. The method includes mixing and reacting an urea and an amine compound to obtain a polyurea oligomer, and mixing and reacting the polyurea oligomer and a cyclic carbonate compound to obtain a polyurethane urea composition having a repeating unit represented by formula I:
R.sup.2U.sup.2U.sup.1U.sup.2R.sup.2, wherein [formula I] U.sup.1 is ##STR00001## a is an integer of 1 to 10000, each U.sup.2 is independently ##STR00002## each R.sup.1 is independently a C1 to C20 alkylene group, a C3 to C20 cycloalkylene group, a C8 to C20 alkylarylene group, a polyether group having a weight-average molecular weight of 100 g/mol to 10000 g/mol, or a combination thereof, and each R.sup.2 is independently an aliphatic group, a cycloaliphatic group, an aromatic group substituted by an alkyl or an unsubstituted aromatic group, an oligo polyether group, an oligo polyester group, or a combination thereof.