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POST-TANNING GELS
Technical Examples
- A plurality of sheet-like substrates infused by an aqueous self-tanning position is enclosed in a dispensing enclosure, from which they may be removed one at a time. The self-tanning composition adheres to each substrate while in the container, and transfers from the substrate when applied to the skin of a user. The aqueous self-tanning composition comprises 45% to 65% by weight of aqueous extract of Japanese green tea, 5% to 15% dihydroxyacetone, 5% to 25% ethylethoxydyglycol, 3% to 10% PPG-12-Buteth-16, 1% to 13% of a humectant, 0.05% to 0.5% of minerals, and other trace constituents such as an exfoliator, moisturizer, colorant, anti-oxidant, tanning accelerator, preservative, and sunscreen. The substrates are infused by being placed in a vacuum chamber in which they can be agitated and tumbled, and the ingredients are added in a specific order at specific temperatures, with tumbling and agitation following each step for a specific period of time.
- A novel synthetic aluminium tanning agent as an alternative for chromium based tanning salts without using formaldehyde was prepared by using aromatic polymeric matrix and aluminium (III) salts as raw materials with suitable masking agents. The preparation of the syntan consists of sulphonation of aromatic molecule, which is incorporated with a polymeric network along with ligands specially designed for the complexation of aluminium (III) salts. The complex can be used as a self-tanning agent in leather industry with fairly good filling behavior. The tanned leathers exhibit shrinkage temperature about 85° C. Due to the higher precipitation point of the product, it can be used for tanning directly after deliming thus eliminating the pickling process. This product, unlike the conventional phenol based products, does not undergo photo-oxidation thereby preventing the discoloration of the tanned leathers.
- The present invention relates to improved methods for filling the skin for cosmetic or medical purposes. Compositions comprising carboxymethyl cellulose (CMC), polyethylene oxide (PEO) and calcium ions can be made and have physical properties that depend on the amounts and types of CMC, PEO, and calcium ions to form ioniclaly cross-linked gels. Compositions can be formed into microspheres, coascervates, gels, or membranes. Gels, microspheres and coascervates can be injected directly into a site for dermal filling. Membranes can be surgically introduced, where they swell to form hydrated gels. After introduction, the dermal filler persists for a period of time and then can disintegrate and be removed from the body.
- Adherent gels and adherent gel composites which can be made by applying an adherent gel onto one or more selected substrates of foam, plastic, fabric, metal, concrete, wood, wire screen, refractory material, glass, synthetic resin, synthetic fibers, and the like. Such adherent gels and gel composites are useful for protecting articles, the body and skin.
- Coacervate gels having excellent shear viscosities and other properties are made with anionic or cationic polymers, a smaller amount of a surfactant having a charge opposite that of the polymer, and a hydrophobic alcohol. The Zeta Potential of the gel is maintained at an absolute value of at least 20. Optional gel promoting additives include betaines and amine oxides. A preferred gel comprises poly diallyl dimethyl ammonium chloride, a lesser amount of sodium lauryl sulfonate, and lauryl alcohol. The gels are particularly useful forming plugs and pigs for separating fluids in pipes.
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