Foam compositions are provided. The compositions are prepared from multi-functional acetoacetate esters and multi-functional amines or acrylates. The foam compositions can include one or more additives. The foam compositions can be used for home and commercial insulation, air sealing sound proofing, structural improvement, and exterior roofing, among other applications. The foam compositions provide advantages of being isocyanate free and offer reduced exposure to isocyanate.

Polysaccharide based hydrogel compositions and methods of making and using the same are provided. The subject polysaccharide based hydrogel compositions are prepared by combining a polysaccharide component with a hydrophilic polymer and a cross-linking agent. Also provided are kits and systems for use in preparing the subject compositions.

The present invention aims to provide a crosslinking agent composition for water-absorbing resins with which it is possible to produce a water-absorbing agent having a high water absorption capacity. The present invention also aims to provide a water-absorbing agent produced by crosslinking a water-absorbing resin with the crosslinking agent composition for water-absorbing resins. The present invention may include a crosslinking agent composition for water-absorbing resins containing a crosslinking agent (A) and a water absorption improver (B), wherein the water absorption improver (B) is a halohydrin compound (b1) represented by the formula (1) below or a compound (b2) containing at least one selected from the group consisting of carbonate, carbamide, carbamate, and ureide groups:

##STR00001##

wherein X represents a chlorine atom or a bromine atom; and Y represents a hydroxyl group, a chlorine atom, or a bromine atom.

A method for foaming an adhesive includes injecting gas into an adhesive in the liquid state to decrease the density of the adhesive. The method then includes mixing the gas-infused adhesive to generate a foamed adhesive having many small bubbles throughout the adhesive, with at least 80% of the bubbles having a size of 0.005 microns or greater. The method then includes curing the foamed adhesive to preserve the size of each of the bubbles generated in the foamed adhesive.