Abstract: This invention relates to aqueous dispersions or latices of phosphazene rubbers which are useful in the production of coatings and foams, particularly where fire resistant materials are required, and to the resulting coatings and foams prepared using such latices.

Abstract: The instant invention relates to the preparation of stable, relatively low viscosity dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds as dispersing agents. The process broadly comprises mixing an aqueous dispersion of an isocyanate-polyaddition product with a compound having at least two hydroxyl groups and having a boiling point about 100.degree. C., and thereafter at least partially distilling off the water.

Abstract: Polymers containing a reactive aromatic system in the side chain which consist of structural units of the general formula IV: ##STR1## where R.sup.1 is hydrogen or CH.sub.3,R.sup.2 is alkyl containing 1 to 6 carbon atoms,R.sup.3 is an acyl or sulfonic group,Ar is a bifunctional aromatic residue, andX=1 to 4.Said polymers being subject to further treatment consisting of acid hydrolysis and subsequent modification, e.g., with chloroacetic acid, formaldehyde or diazotizing and coupling with a suitable passive component.

Abstract: A cellular elastomeric product is prepared by the curing of a froth prepared by whipping air into an aqueous dispersion of colloidal elastomer, said aqueous dispersion containing a latex frothing agent consisting of an aqueous solution containing about 70% water and about 25% magnesium di(lauryl sulfate), about 2.5% polyalkoxyglycerol having about eight alkoxy groups per hydroxyl and about 2.5% of a quaternary, dihydroimidazole derivative, there being a fatty acid carbon chain attached as the only carbon-carbon linkage for the carbon between the two nitrogens of the imidazole ring, the quaternary nitrogen partaking of the nature of a quaternary sodium glycinate having at such quaternary nitrogen both an alkhydroxy group and said dihydroimidazole ring.

Abstract: A uniformly expandable hydrophilic sponge, adapted for medical usage, characterized by instantaneous wicking and a high liquid holding capacity comprising a reaction product of polyvinyl alcohol and formaldehyde. The wicking and liquid holding capacity is attained by controlling the time, temperature and processing conditions while forming and curing the reaction product in an aqueous medium. The sponge is rendered uniformly expandable by drying the wet sponge while maintaining the shape of the wet sponge. The sponge can be made X-ray opaque by incorporating, homogeneously, throughout an encapsulated radiopaque substance with the formaldehyde and polyvinyl alcohol. The sponge is biocompatible, non-toxic, lint free, compressible, resilient, strong, non-abrasive, free of foreign leachable materials and is of exceptionally high fluid holding capacity.