Stick products, waxes

Antiperspirant sticks based on this mol ding technique have become more popular since volatile low mol wt cyclomethicones [69430-24-6] have been used successfully as the Hpids and fatty alcohols as the waxes. This type of product deHvers the active antiperspirant to the site as a clinging powder without excessive oiliness. 

If compression is requited to provide a stick or pan-type of product, the bulk components must be held together with a binder. Common binders ate various Hpids, polymers, polysaccharides, and waxes. Some binder compositions include water, which is removed by drying the compact. The amount of binder must be carefully controlled to yield a soHd, nonfragile compact that is soft enough to pay off. Excessive amounts of or improperly compounded binders glaze during use because of transfer of skin lipids to the compact. 

A simple deodorant consists of an antibacterial agent in a cream base. Antiperspirant ingredients ( aluminum salts ) such as aluminum chlorohydrate, activated aluminum chlorohydrates, and aluminum-zirconium-glycine (AZG) complexes work by forming superficial plugs in the sweat ducts, reducing the flow of perspiration. Antiperspirants are available in four product types cream, liquid, powder, or stick. They usually include aluminum salts, titanium dioxide, oxyquinoline sulfate, zirconium salt, alcohol, and antibacterial agents. Some liquid forms are propellant dispensed (aerosols). Waxes, soap, and humectants may be present in minor proportion in stick forms. Roll-on types may be added with... 

Lac is a resinous substance produced mainly from the banyan txee of the East Indies. It is the product of on insect. Stick lac is the resin in its natural state seed lac when broken up, cleaned of impurities and washed shellac when it is melted and formed in thin flakes. United with ivory-black or vermilion it makes sealing wax. 

Tacky materials tend to stick to rotors and mbdng chamber walls. This is one of the drawbacks in this type of mixing. When this happens, one has to cool the Banbury walls and rotors. This is a time consuming process and slows down production. Occasionally, use of an appropriate lubricant eliminates this problem. Examples of common lubricants are fatty acids and their metal salts or amides, polyethylene waxes, and silicone compounds. 

Release agents should ideally have high tensile strength so they are not worn by abrasive mineral fillers or glass fiber reinforcements. The agents should also be chemically resistant to decomposition and should stick to the mold to prevent interference with the final product. The major types of materials used as mold release agents are fatty acid esters and amides, fluoropol5miers, silicones, and waxes. 

These are highly effective external lubricants for PVC, with positive effect on gelation and surface quality of finished products. Polar polyethylene waxes have a pronounced anti-sticking effect and high molecular types are suitable for transparent items. Other waxes improve pigment dispersion and permit production of highly concentrated masterbatches with better colour yield. 

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