Abstract: Hemostatic-adhesive, collagen dressings in the form of dry-laid, non-woven, self-supporting webs of collagen fibers and methods for preparing those webs are disclosed. The webs are formed from a mass of hemostatic-adhesive, collagen fibers having a moisture content of from about 7% to about 15% by weight, and retain the hemostatic-adhesive properties of the mass of collagen fibers.

Abstract: Polymeric materials are combined with modified heat exfoliated hydrated magnesium aluminosilicates. The aluminosilicates are treated with aqueous acidic solutions and subjected to controlled agitation to convert highly porous concertina-shaped granular hydrated magnesium aluminosilicates into groups of electrolyte insensitive platelets. Water slurries of the groups of platelets when dried form coherent, continuous sheets which when mechanically disintegrated may be reslurried in water. The modified heat exfoliated magnesium aluminosilicates are adapted for use in fire retardant, loose fill cellulose insulation, paper and pulp products, synthetic polymeric materials, coatings such as fire retardant acoustic coatings, dog foods, defoliants and the like.

Abstract: Absorbent, coherent, flexible structures in the form of fibrous webs and porous sponges comprising cellulose derivatives having a DS of between about 0.05 and about 0.35 whereby upon application to the body and wet with aqueous body liquids, the protruding fibers and fibrils or hairs become highly swollen or may dissolve thereby eliminating irritation. The derivative may be such as to impart hemostatic properties and the structure may include uniformly dispersed therein chitin and/or starch derivatives to enhance the hemostatic efficacy. The structures may include water-soluble agents which function as dry binders but when the structure is wet with aqueous body liquids, the agents dissolve and become leached from the structures.

Abstract: Heat exfoliated hydrated magnesium aluminosilicates are treated with aqueous acidic solutions and subjected to controlled agitation to convert highly porous concertina-shaped granular hydrated magnesium aluminosilicates into groups of electrolyte insensitive platelets. Water slurries of the groups of platelets when dried form coherent, continuous sheets which when mechanically disintegrated may be reslurried in water. The modified magnesium aluminosilicates are adapted for use in fire retardant, loose fill cellulose insulation, paper and pulp products, coatings such as fire retardant, acoustic coatings, dog foods, defoliates and the like.

Abstract: Readily hydratable cellulose products prepared by acid treatment of highly fibrillated filbrillatable cellulose precursor such as wood pulps. Highly flocculent slurries are formed when the products are mixed in water. The slurries exhibit slow settling rates and the material gradually settles, after prolonged standing, into a highly flocculent, uncompacted mass below a layer of crystal clear aqueous medium.

Abstract: Collagen, such as, corium, is freed of pyrogenetic substances by processing green corium with aqueous solutions of alkalie or alkaline earth metal hypochlorites, washing with aqueous ethanol and subsequently washing with pyrogen free water.

Abstract: A fluffy, finely-divided fibrous collagen derived product having hemostatic and adhesive properties sufficient to join together severed biological surfaces in a live warm blooded animal when the product is wet with blood between the surfaces. In the preparation of the product, water-wet collagen is treated with ethanol to remove water, is converted to a ionizable partial salt in the presence of ethanol and dehydrated with ethanol so as to control and limit the swelling of the collagen fibers and prevent hornification upon drying. The recovered dry material is subjected to deaggregation to form a mass having a bulk density of not more than 8 pounds per cubic foot and a surface area of at least 1 square meter per gram.

Abstract: Non-woven, liquid-laid, fibrous web having hemostatic and adhesive properties adapted to seal a wound formed of fibers consisting of an ionizable, water-insoluble, partial salt of collagen, the web when placed on a saline solution disintegrating completely and the fibers self disperse. The web is formed from a slurry of the fibers in a water-miscible organic liquid such as ethanol containing a small proportion of an ionizable acid.

Abstract: Colloidally dispersible microcrystalline polyesters are prepared by a hydrolytic removal of amorphous regions in synthetic, linear polyesters followed by a mechanical disintegration of the resulting aggregated microcrystals to produce discrete microcrystalline particles at least 5% by weight having a particle size not exceeding 1 micron. The microcrystalline polyesters exhibit a sharp X-ray diffraction pattern and distinctly modified thermal behavior as compared to the parent or precursor polyester resin.