PARKERSBURG, W. Va. — More than 50 years after DuPont started producing Teflon near this Ohio River town, federal officials are accusing the company of hiding information suggesting that a chemical used to make the popular stick- and stain-resistant coating might cause cancer, birth defects and other ailments.I have been experimenting with Lanasyn acid dyes from Archroma on wool. the name Lanasyn to two entirely different ranges of acid dyes. The Lanaset dyes are made by a different dye company, Huntsman. Fiona on For polyester, do you know anything about Rit DyeMore. PayPal donation button.Dyed with direct dyes and, vat and acid dyes with certain pre-treatments. Substantivity. Huntsman–AVITERA® SE Poly-reactive dyes. S. No. Dye name Commercial name. Dye type. Improvements in the. also suited polyester and nylon as well, thereby widening the area of application on. electron donor 82.Acid dyes. 486. N. SEKAR, Institute of Chemical Technology Mumbai, India. 16.7 Environmentally friendly dyeing of polyester. 552. 16.8 Future. and pigments in order of commercial name, name of manufacturer, for-. molecular layers where the amino and hydroxyl groups function as donors. F dyes by Huntsman. Ea free forex forum. I have been experimenting with Lanasyn acid dyes from Archroma on wool yarn, but I can’t seem to find much information on them online, and none on your web page either.Is there somewhere I can get information on washfastness, full range of shades, etc.?Are they actually the same as Lanaset/Sabraset, or something else altogether?It seems like some of the colours, like the blues, are the same names, but not the reds.
Sustainable Innovations in Textile Chemistry and Dyes - Springer Link
Intelligent Mixtures - Huntsman Corporation
Dyeing process. Systematic OptimizationThere are two established methods of dyeing polyamide with acid and metal-complex dyes the constant-pH process and the pH-sliding process. While the constant-pH process ensures that the dye exhausts onto the substrate by raising the temperature,Dyes - originally obtained exclusively from natural sources - are today also produced synthetically on a large scale and represent one of the very mature and traditional sectors of the chemical present reference work on Industrial Dyes provides a comprehensive review of the chemistry, properties and applications of the most.Textile Finishing Chemicals An Industrial Guide. by Ernest W. Flick. Contents. PRODUCT INFORMATION 1 Aceto Chemical Co. Inc 2. Acid Donor 501 SANDACID Aftertreatment to Reduce Effect of Thermomigration 501. CHEMICAL NAME INDEX 655 TRADE NAME INDEX 671. Read "Textile Finishing Chemicals An Industrial Guide" as PDF. HUNTSMAN Textile Effects, 320002e. application of LANASET® dyes on polyamide and silk please refer to the. formic acid 85%. based on chemical composition, the fiber fineness dtex, fiber surface/cross section round, trilobal, etc.TEXTILE FINISHING CHEMICALS An Industrial Guide Ernest W. Flick William Andrew Inc. Trade name and product number, 3 Product description including properties and applications, as presented by the suppl ier. TAMOL Dispersants 498 TR ITON Surfactants 499 Sandoz Chemicals 501 Textile Chemicals 501 Accelerating 501 SANDOTHERM Acid Donor.With over 25,000 direct MSDS sources, and hundreds of thousands more 1 more click away, this is the most complete MSDS source on the internet. It's also one of the very few that doesn't require you to either register or pay! To locate a manufacturer click on the first letter of the name or scroll down to see all the listings.
The p H of the dye bath is initially at a level that substantially inhibits the dye from being absorbed by the polymer. In particular, when exposed to acidic conditions, the amino groups are activated by protonation and become positively charged and cationic.In accordance with the present invention, however, an acid producing composition is added to the bath which gradually reduces the p H of the bath and allows for uniform diffusion of the dye into the polymer. Once positively charged, the acid dyes are strongly attracted to the cationic sites.The acid producing composition of the present invention is a maleate ester, which, in one embodiment, is the reaction product of maleic acid or maleic anhydride and a glycol. In general, acid dyes have a high affinity for protonated polyamide materials meaning that the dyes have a strong tendency to quickly bind to the polymer. Forex indicator volume with alert. Polyamide materials have been conventionally dyed using acid dyes, which are anionic in character. During production of such products, the polyamide materials are typically dyed a desired color. For instance, natural and synthetic polyamide fibers are commonly used to produce fabrics and carpets.
In other words, acid dyes exhibit such a high rate of strike that they do not diffuse evenly into polyamides.Thus, if the dye is absorbed by the polymer too quickly, the polyamide material can absorb the dye unevenly and not exhibit a constant shade or color.Consequently, polyamide materials are typically dyed with acid dyes under carefully controlled conditions in order to control the rate at which the dye is absorbed by the polymer. Analisa triangle forex. In particular, the temperature and the p H of the dye bath are usually monitored and regulated during the process.Specifically, increasing the temperature of the bath increases the diffusion rate, while controlling the p H controls the number of dye sites that are available for receiving the acid dye.For instance, at each p H of the dye bath, a distribution equilibrium exists between the polyamide material and the dye.
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At higher p H's, the dye is not readily accepted by the polymer.At lower p H's, on the other hand, equilibrium shifts and the dye becomes strongly attracted to the polymer.In conventional acid donor systems for dyeing polyamides with acid dyes, the polyamide materials are placed in a dye bath initially containing an acid dye, a leveling agent, and an acid donor sufficient for dye exhaustion. Close di forex. Sometimes an alkaline composition is added in an amount sufficient to raise the p H of the bath to a level that inhibits initial absorption of the dye into the polymer.The dye bath is heated to promote the hydrolysis of the acid donor composition which decrease the p H gradually.Ideally, the p H of the bath is dropped at a rate which causes the dye to slowly diffuse into the polymer substrate. Although the above proposed compositions have shown some success in controlling the p H of dye baths, better controls are still needed.
List of Pyro Chemicals - Pyrotechnic Chemistry - UK.
Textile Effects ERIONYL FF - Huntsman Corporation
Other agents that have been added to dye baths in the past for decreasing the p H of the bath during dyeing of polyamide materials include lactones as described in U. It is another object of the present invention to provide an acid producing composition which gradually lowers the p H of a dye bath used to dye polyamide materials.Still another object of the present invention is to control the p H of a dye bath during the dyeing of polyamide materials by adding to the bath an acid producing composition containing a maleate ester.These and other objects of the present invention are achieved by providing a process for dyeing a material containing a synthetic or natural polyamide. For example, an acetate buffer composed of acetic acid and either sodium or ammonium acetate has been used for p H control. The present invention recognizes and addresses the foregoing disadvantages, and others of prior art constructions and methods.Acetic acid, however, which is volatile, was found to vaporize during some dyeing processes. 3,980,428, an ester of a saturated C -carboxylic acid as disclosed in U. Accordingly, it is an object of the present invention to provide a process for dyeing polyamide materials with an anionic dye, which is also referred to as an acid dye.Substantial vaporization of the acetic acid caused the p H of the bath to drift upwards which resulted in uneven application of the dye. Another object of the present invention is to provide a process for controlling the p H of a dye bath designed for dyeing polyamide materials.