Durable finishes antistatic

Cross-linked finishes are not permanent in the tme sense of the word however, under optimum conditions the finish can last for the usehil life of the material. Wet abrasion during laundering is probably the principal cause of gradual removal of the finish. In order to retain antistatic protection for extended use, an excess of finish is often appHed The extent of chemical interaction between the durable antistatic agents and the fiber substrates to which they are appHed is not perfectiy understood. Certain oxidizing agents such as hypochlorite bleaches tend to depolymerize and remove some durable antistatic finishes. Some of the durable finishes have also produced undesirable side effects on textile materials, ie, harsh hand, discoloration, and loss of tensile properties. 

The required extent of durabiUty depends on the use of the treated article. For example, an antistatic finish that is removed after several launderings would be termed nondurable for blankets to be used in hospitals and motels where static protection through over fifty launderings is desirable. However, the same finish appHed to blankets for household use which would be laundered once or twice per year could be termed durable. Antistatic finishes have been widely reviewed (73—75,77,86,90—95). 

Durable Antistatic Finishes. The difficulty with nondurable finishes, as far as the consumer is concerned, is that they are water-soluble and thus easily removed by washing. An effective antistatic finish must be durable and capable of withstanding repeated laundering and dry-cleaning cycles. 

Only a small number of durable antistatic agents are available for textiles. Semidurable antistatic finishes for textile materials based on compounds of limited solubiUty and moderate resistance to wet treatments were known in the eady 1950s. 

Some commercial durable antistatic finishes have been Hsted in Table 3 (98). Early patents suggest that amino resins (qv) can impart both antisHp and antistatic properties to nylon, acryUc, and polyester fabrics. CycHc polyurethanes, water-soluble amine salts cross-linked with styrene, and water-soluble amine salts of sulfonated polystyrene have been claimed to confer durable antistatic protection. Later patents included dibydroxyethyl sulfone [2580-77-0] hydroxyalkylated cellulose or starch, poly(vinyl alcohol) [9002-86-2] cross-linked with dimethylolethylene urea, chlorotria2ine derivatives, and epoxy-based products. Other patents claim the use of various acryUc polymers and copolymers. Essentially, durable antistats are polyelectrolytes, and the majority of usehil products involve variations of cross-linked polyamines containing polyethoxy segments (92,99—101). 

Eor instance, exhaust appHcation is possible with cationic finishes which have an affinity for the anionic groups in polymeric materials. After appHcation, the textile is dried. Durable antistatic finishes require cross-linking of the resin. Cross-linking is usually achieved by subjecting the treated, dried material to heat curing. A catalyst is often incorporated to accelerate insolubilization. 

A wide variety of special durable surface treatments have been used on manufactured fibers. These include treatments for imparting such characteristics as soil resistance, antistatic behavior, and wearer comfort through moisture wicking and transport. Fiber finishes also have been used successfully in promoting adhesion between two materials, as, for example, between polyester tire cord and rubber, and between glass fiber and polyester resin. 

Permanent antistatic fmishes, based on crosshnked polyamines and polyglycols, need an alkaline catalyst. Therefore the one-bath combination with finishes, which need acid catalysis, is difficult but not impossible. Examples of acid-catalysed fmishes are the easy-care and durable press fmishes, durable hydrophylic silicone softeners and elastomeric finishes, also fluorocarbon-based repellency and some flame-retardant finishes. High finish effects result from a two-bath application with of the easy-care finish first followed by the surface-related antistatic finish. 

CNC Antistat C New represents a durable antistatic product which is particularly effective on typical problem fibers such as nylon, orIon and dacron. Very small amounts applied to these materials will attach so tenaciously that repeated laundering and dry cleaning will not remove the finish. CNC Antistat C New is substantive in nature and, therefore, has a strong affinity for these fibers. 

CNC recommends 3% (by volume) dispersed in hot water 150F -160F which will produce excellent antistatic properties. CNC Antistat C New is miscible with many other textile auxiliaries that are cationic or non-ionic and can be applied to the fabric with or without these products. However, a more durable effect will be realized if CNC Antistat C New is applied as a top finish. 

Polyelectrolyte for use in resin baths or alone as a top finish to give a very soft hand reduces needle cutting, durable to laundering has antistat qualities can be exhausted or padded. 

Formula H0[Si(CH3)20][Si0H(CH2),NHCH2CH2NH2.0]H Uses Cures to a durable, detergent-resistant film for mold release, particle treatment, textile finishes, and polish applies. antistat in cosmetics... 

The potassium, ammonium, or amine salts of interpolymers prepared from monomers such as lauryl methacrylate, methyl methacrylate, and maleic acid are of particular utility in the disposable nonwoven industry where there is need for polymers that will absorb and retain water and ionic physiological fluids. " In general, the polymeric coatings give a durable, antistatic, antisoil-able finish to a variety of filamentry materials. 

Vinyl fibers except for vinal and vinal-vinyon do not generally undergo specialized finishing, although antioxidants and antistatic agents may be used. Vinal and vinal-vinyon matrix fibers can be treated with urea-aldehyde based durable press finishes to improve their wrinkle recovery, and vinal can be made flame retardant with phosphorus-containing finishes used for cellulosics. 

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