Described herein is a process for preparation of a superabsorbent polymer with high fluid absorptivity. Also described is a composition including the superabsorbent polymer.

Modification of functional groups along a polymer backbone to render the groups activatable upon exposure to actinic radiation is described. The polymers are typically controlled architecture polymers. Also described are adhesives containing the modified architectured polymers and related methods of use.

Use of a coating composition for making a frost resistant substrate, the coating composition comprises at least one copolymer (ZW-CA) comprising: (a) repeating units (RZW) derived from at least one zwitterionic monomer, monomer (B), and (b) repeating units (RCA) derived from at least one monomer containing carboxylic acid and/or carboxylic anhydride, monomer (B), and at least one crosslinking agent (CL).

Certain disclosed embodiments concern a crosslinker having a Formula I

(Polymerizing Group 1).sub.s-(Amino Acid).sub.u-(Polymerizing Group 2).sub.y   Formula I,

where polymerizing group 1 and polymerizing group 2 independently are selected from an acrylate, alkyl acrylate, acrylamide, alkyl acrylamide, acrylonitrile, alkyl acrylonitrile or a (hydroxyalkyl) acrylate; s and y are from 1 to 10, with s and y each typically being 1; the amino acid is any naturally occurring amino acid, any non-naturally occurring amino acid, and any and all combinations thereof; and u is 2 to 100. Crosslinkers may include a naturally occurring amino acid or acids that are selected to provide amino-acid defining functional groups that are zwitterionic at a pH of from 2.5 to 10. Disclosed crosslinkers can also include “internal spacers”, “external spacers,” or both. Crosslinkers according to the present invention are used to make zwitterionic hydrogels that address fouling and bacteria adhesion issues associated with previously known hydrogels. Accordingly, such products are particularly suitable for biomedical applications, such as contact lenses, drug delivery vehicles, tissue engineering platforms, tissue regeneration platforms, catheters, implants and sensors.

The production method includes: a gel-crushing step of grinding a crosslinked hydrogel polymer to obtain a particulate crosslinked hydrogel polymer; a heating drying step of obtaining dried particles from the particulate crosslinked hydrogel polymer by using a continuous stirring drying machine; a post-crosslinking step of post-crosslinking the particulate crosslinked hydrogel polymer or the dried particles; and a sizing step of adjusting a particle size of the dried particles or the post-crosslinked dried particles to obtain water-absorbent resin powder. The particulate crosslinked hydrogel polymer contains a gel fluidizer. A gel temperature of the particulate crosslinked hydrogel polymer containing the gel fluidizer, the gel temperature being measured by a contact thermometer, is not lower than 50° C. In the production method, the dried particles or the post-crosslinked dried particles is forcedly cooled before the sizing step.

A latex of an acid-modified conjugated diene polymer including the acid-modified conjugated diene polymer obtained by modifying a conjugated diene polymer with an acid group-containing compound, in which a content of a structural unit derived from the acid group-containing compound is 0.2 to 0.7 parts by weight with respect to 100 parts by weight of the acid-modified conjugated diene polymer; a content of a water-soluble polymer in the latex is 2 parts by weight or less with respect to 100 parts by weight of the acid-modified conjugated diene polymer; when a solids content of the latex is adjusted to 60 wt %, a viscosity at 25° C. is 800 mPa.Math.s or less; and when the solids content of the latex is adjusted to 50 wt %, the viscosity at 25° C. is 300 mPa.Math.s or less.

The present disclosure provides methods for producing an olefin polymer by contacting a C.sub.3-C.sub.40 olefin, ethylene and a diene with a catalyst system including an activator and a metallocene catalyst compound comprising a substituted or unsubstituted indacenyl group and obtaining a C.sub.3-C.sub.40 olefin-ethylene-diene terpolymer typically comprising from 30 to 55 mol % ethylene, from 69.09 to 45 mol % C.sub.3 to C.sub.40 comonomer, and from 0.01 to 7 mol % diene wherein the Tg of the terpolymer is −28° C. or less. Preferably, a propylene-ethylene-ethylidene norbornene is obtained.

The present invention relates to a cosmetic or pharmaceutical composition for topical application, said composition comprising the combination of a crosslinked oligo(ethylene glycol) based polymer in the form of an aqueous dispersion of microgel particles and a non-crosslinked water-soluble oligo(ethylene glycol) polymer. The invention also relates to a process for preparing this composition.

The present invention discloses a process for providing a cross-linked composition, the process comprising the steps of (a) providing an ethylene-α-olefin plastomer having—a density of from 850 kg/m.sup.3 to 900 kg/m.sup.3; and—an melt flow rate (ISO 1133, 2.16 kg, 190° C.) of 0.3 to 50 g/10 min; (b) grafting the ethylene-α-olefin plastomer with silane crosslinker such that the content of silane crosslinker is in the range of 0.1 to 10.0 wt.-% with respect to the grafted ethylene-α-olefin plastomer; (c) contacting said grafted ethylene-α-olefin plastomer with 2 to 8 wt.-% of a tin-free silane crosslinking catalyst with respect to the resulting mixture of grafted ethylene-α-olefin plastomer and tin-freesilane crosslinking catalyst, wherein said tin-free catalyst comprises a Brönsted acid at 23° C. and 50% relative humidity for at least 15 minutes thus forming a cross-linked composition, wherein gel content of said cross-linked composition after 15 min is at least 60%.

A method for manufacturing an aqueous adhesive composition and the aqueous adhesive composition are provided in the present application. The aqueous adhesive composition has excellent adhesive strength. The aqueous adhesive composition provides adhesion property having polar and non-polar adherends, and the method for manufacturing such aqueous adhesive composition is provided.