Solvent for carbonless copy papers

Empiiical C16H20 Properties M.w. 212.34 Uses Solvent for carbonless copy paper Manuf./Distrib. Koch Spec. Chem. http //WWW. kochind. com 1,4-Diisopropyl naphthalene CAS 24157-79-7... 

Uses Solvent for carbonless copy paper for office forms, industrial cleaning solvs., waterless hand cleaners, fragrance bases, automotive and furniture polishes, insecticide bases, lamp oils electrostatic discharge machine fluids magnetic particle inspection fluids defoamer in paper and coatings industries froth flotation cleaning of vegetables food-contact applies. 

Chlorinated paraffins are versatile materials and are used in widely differing appHcations. As cost-effective plasticizers, they are employed in plastics particularly PVC, mbbers, surface coatings, adhesives, and sealants. Where required they impart the additional features of fire retardance, and chemical and water resistance. In conjunction with antimony trioxide, they constitute one of the most cost-effective fire-retardant systems for polymeric materials, textiles, surface coatings, and paper products. Chlorinated paraffins are also employed as components in fat Hquors used in the leather industry, as extreme pressure additives in metal-working lubricants, and as solvents in carbonless copying paper. 

Phase separation process takes advantage of the phenomenon called polymer- lymer incompatibility. The process utilizes two polymers that are soluble in a common solvent yet do not mix with one another in the solution. The polymers form two separate phases one polymer intended to form the capsnle walls, the other incompatible polymer meant to induce the separation of the two phases, but not meant to be part of the capsule wall material. This process is somewhat related to the complex coacervation process. The phase separation process is considered as the oldest true encapsulation technology first developed by the National Cash Register Company for carbonless copy-paper. Microencapsnlation by coacervation involves the phase separation of one or more hydrocolloids from the initial solntion, and the subseqnent deposition of the newly formed coacervate phase around the active ingredient suspended or mnulsified in the same reaction media. The size of the miCTocapsules formed may be in the range of 10-250 pm. 

The process is based on the phase separation of one or several hydrocolloids from an initial solution and the subsequent deposition of this newly formed coacervation phase around the active ingredient (aroma) suspended or emulsified in the same reaction media. Then the hydrocolloid shell may be cross-linked with appropriate cross-linkers. The phase separation will be provoked by reaction between two different colloids by varying temperature, pH, and medium composition (solvent, salts). This process was tested in the 1950s for carbonless copy paper (dye in particles 20 pm) (Risch and Reineccius, 1988 Gouin, 2004 Leclercq et al., 2009). 

Uses Solvent for aluminum rolling oils diluent solvent in carbonless copy paper and in spark erosion machining as dean fuel in lamp oil and barbecue lighter fluids solvent in agric. pesticides/herbicides, cleaners, degreasers chem. teed-stock fuel food-contact paper/paperboard, rubber articles defoamer in food-contact paper/paperboard... 

In more recent times, naphthalene has been used in condensation products from naphthalene sulfonic acids, utili2ing formaldehyde as additives to improve the flow properties of concrete these are referred to as superplastici2ers. Another newer appHcation is the production of diisopropylnaphthalenes. The mutual depression of the melting points in the mixture gives a Hquid which is used as a solvent for dyes in the production of carbonless copy paper. 

Biphenyl, terphenyl, and their alkyl or hydrogenated derivatives generally serve markets where price and performance, rather than composition, is the customer s primary concern. Performance standards for heat-transfer appHcations are usually set by the fluid suppHer. The biphenyl—diphenyl oxide eutectic (26.5% biphenyl, 73.5% DPO) represents a special case. This composition has become a widely recogni2ed standard vapor-phase heat-transfer medium. It is sold throughout the world under various trademarks. In the United States, Dow (Dowtherm A) and Monsanto (Therminol VP-1) are the primary suppHers. Alkylated biphenyls and partially hydrogenated terphenyls serving the dielectric and carbonless copy paper dye solvent markets likewise are sold primarily on the basis of price and performance characteristics jointly agreed on by producer and user. 

Uses Plasticizer for lacquers, plastics, cellulose esters, and vinyl resins heat-exchange liquid carbonless copy paper systems in aircraft hydraulic fluids solvent extraction of metal ions from solution of reactor products uranium extraction and nuclear fuel reprocessing pigment grinding assistant antifoaming agent solvent for nitrocellulose and cellulose acetate. 

Two compounds are currently of particular interest in paper and board. Diisopropyl naphthalene (DIPN) is a mixture of isomers that until recently were widely used in carbonless copy papers as ink solvents. Although it is currently being replaced it occurs as a persistent contaminant in recycled paper and board. Various studies have shown that it is able to migrate from paperboard into food. There is a draft CEN analytical method available. This method involves acetone extraction and quantification by GC-MS using diethyl naphthalene as an internal standard. There is currently no limit for DIPN but levels are being monitored to reduce concentrations in recycled paperboard. 

The development of synthetic dyestuffs provided further impetus for advances in naphthalene chemistry. Towards the end of the last century, its oxidation into phthalic anhydride (PA) attained particular importance as a step in a successful route for the economical synthesis of indigo. In the 20 th century, the classic uses of naphthalene have been extended into new areas, for example, the development of the naphthol AS dyes from the parent naphthols, and the production of PA-based plasticizers and pesticides. The most recent developments in the field of industrial naphthalene chemistry concern the production of alkylnaphthalene-derivatives as solvents for use in carbonless copy papers, as well as the manufacture of naphthoquinone for the synthesis of anthraquinone. 

A new application for naphthalene with considerable growth potential is the production of alkylated naphthalenes, especially that of diisopropylnaphthalenes. Resulting from the mutual depression of melting-points, the mixture of diisopro-pylnaphthalene is liquid and can therefore be used as a high-value solvent for dyes in the production of carbonless copy papers. The solvents for dyes must meet certain preconditions, i. e. exhibit high solvent power, be free from odor, be toxico-... 

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