The DuPont investigation.

Acid donor for dyeing polyamide huntsman trade name 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

Dyeing method • Fluorescent acid dyes are small molecular levelling dyes, which need a lower pH than other acid dyes. Usually pH 3.2 to 3.5 is required with formic acid • Retarding agents, lubricants and strong leveling agents should be used in small amounts only • Good levelness is achieved by excellent migration during boiling.Group at acid pH g ave dyes -azo-thieno-o xazoles 27 72, Figure 41. Rangnekar et al. 71, have been demonstrated the using of 2-amino- thiophenes via the Gewald reaction for synthesized.Polychloroprene is the polymer name for the synthetic rubber known as neoprene a proprietary trade name of DuPont that has become generic. One of the first successful synthetic elastomers, neoprene was first prepared in 1931 by Arnold Collins, a chemist in Wallace Hume Carothers' research group at DuPont, while he was investigating by. Pyrol 2-pyrrolidone is used as a drug solubilizer and penetration enhancer in parenteral and injectable dosage forms, specifically in veterinary products. It is also used for solvency, adhesion enhancement and solubility in paints and coatings and printing more information, contact us. 2-Pyrol 2-pyrrolidone is used for solvency.TECTILON ® range of acid leveling dyes are designed for pale-to-medium depth on polyamide PA. These low-molecular, mono-sulfonated acid dyes deliver the highest light fastness, even for very pale shades. They also offer outstanding migration, compatibility and excellent leveling properties, along with very good coverage of physical affinity differences barriness.Dyeing of polyamide fibres wool, silk and nylon dyeing mechanism polyamide structure nh2---x—cooh nh2 end amino group cooh end carboxyl group x polyamide cha Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.

Handbook of textile and industrial dyeing - Library

Dyeing and Printing. Acid RC. Polyester bluesign approved. Jintex. Reduction HSA. Softener A V06 different trade name for WashTechs 7335LC. Screened.P-13-0304 2/21/2013 5/21/2013 Apollo Chemical S Acid donor for dyeing nylon and nylon containing fabrics S Ethanol, 2,2'-oxybis-,1,1'-diformate. P-13-0305 2/21/2013 5/21/2013 3M Company—group compliance 3m automotive and chemical markets group G Intermediate G Fluorinated ester.Is India's largest B2B portal with over 5 million registered users. The marketplace serves as a platform to buy make in India products, trade with Indian manufacturers, suppliers, exporters and service providers and help grow their business globally. They mention that the Lanasyn F dyes are not so good for color mixing.I have not been able to find further information on the dyes in the Lanasyn F and Lanasyn M dyes ranges, aside from finding a couple of lists online of the names of the dyes in each range, and tentatively identifying the Colour Index names of a few of them.What you will need to do is contact Archroma and ask them for more information about their dyes, including specific washfastness and lightfastness information.Some dye retailers supply a range of dyes that includes a few of the Lanasyn dyes, along with other brands of dye that act similarly and can be used with them.

Acid donor for dyeing polyamide huntsman trade name

Intelligent Mixtures - Huntsman Corporation

Acid donor for dyeing polyamide huntsman trade name 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.

Acid donor for dyeing polyamide huntsman trade name

Roberts, The Essential Role of p H Control in the Dyeing of Carpet Fibres, 8 pages, 1978 (Month Unknown). These materials have many different and diverse uses, especially in the field of textiles. Examples of polyamides include nylons, wool, and silk. Polyamides refer to various natural (polypeptides) and synthetic materials containing free amino groups. More particularly, the present invention is directed to a process for dyeing natural and synthetic polyamides in a dye bath containing an acid dye, wherein the p H of the dye bath is gradually lowered and controlled by an acid producing agent which facilitates uniform dye application. Guthrie, The Effect of Buffer Systems on the Uptake of Acid Dyes by Wool and Nylon, 6 pages, 1976 (Month Unknown). A process for dyeing a material containing a synthetic or natural polyamide, said process comprising the steps of: contacting said material with an aqueous dye bath containing an acid dye, said dye bath having an initial p H that inhibits said acid dye from bonding to said polyamide contained in said material; adding to said dye bath an acid producing agent, said acid producing agent comprising a maleate diester, said acid producing agent being added to said dye bath in an amount sufficient to lower the p H of said bath thereby causing said acid dye to bind to said polyamide contained within said material. A process as defined in claim 1, wherein said maleate diester comprises a reaction product of maleic anhydride or maleic acid and a glycol. A process as defined in claim 2, wherein said glycol comprises a material selected from the group consisting of ethylene glycol and diethylene glycol. A process as defined in claim 2, wherein said glycol is water soluble. A process as defined in claim 1, wherein said acid producing agent is added to said dye bath in an amount sufficient to reduce the final p H of said bath to a range of from about 3 to about 6. A process as defined in claim 1, wherein said synthetic or natural polyamide comprises a material selected from the group consisting of nylon, wool, and silk. A process as defined in claim 1, further comprising the step of heating said dye bath to a temperature of from about 90° F. during application of said acid dye to said material. A process as defined in claim 1, wherein said maleate diester is added to said dye bath in an amount from about 0.25 gram per liter to about 8 grams per liter. A process as defined in claim 1, wherein said maleate diester is added to said dye bath in an amount from about 0.5 grams per liter to about 4 grams per liter. A process for dyeing a textile material containing a synthetic or natural polyamide, said process comprising the steps of: contacting said textile material with an aqueous dye bath containing an acid dye; adding to said dye bath an acid producing agent, said acid producing agent comprising an esterified maleate having the following formula: ##STR5## wherein R results from a glycol or a lower alkyl alcohol, said acid producing agent being added to said dye bath in an amount sufficient to lower the p H of said bath for causing said acid dye to bind to said polyamide contained within said textile material. A process as defined in claim 10, wherein R result from diethylene glycol. A process as defined in claim 10, wherein said polyamide comprises nylon. A process as defined in claim 10, wherein said acid producing agent is added to said dye bath in an amount sufficient to lower the p H of said bath to a final range of from about 4 to about 5. A process for dyeing a material containing a synthetic or natural polyamide, said process comprising the steps of: contacting said material with an aqueous dye bath containing an acid dye; adding to said dye bath an acid producing agent, said acid producing agent comprising a diesterified maleate, said maleate being diesterified by a substantially water soluble glycol, said acid producing agent being added to said dye bath in an amount sufficient to gradually lower the p H of said bath to a point where said acid dye bonds to said polyamide contained within said material. A process as defined in claim 17, wherein said substantially water soluble glycol comprises ethylene glycol. A process as defined in claim 17, wherein said substantially water soluble glycol comprises diethylene glycol. A process as defined in claim 17, wherein said acid producing agent is added to said dye bath in an amount sufficient to lower the p H of said bath to a final range of from about 4 to about 5. A process as defined in claim 17, wherein said acid producing agent is added to said dye bath in an amount from about 0.25 grams per liter to about 8 grams per liter. A process as defined in claim 17, wherein said acid producing agent is added to said dye bath in an amount from about 0.5 grams per liter to about 4 grams per liter. A process as defined in claim 17, wherein said material being dyed is a material selected from the group consisting of carpets, fibers, yarns, woven goods, and knitted goods. A process as defined in claim 17, wherein said polyamide comprises a material selected from the group consisting of nylons, wool, and silk. A dye bath for dying polyamide materials comprising an aqueous solution containing an acid dye and a maleate diester, said maleate diester consisting essentially of a reaction product of maleic acid or maleic anhydride and a glycol. A dye bath as defined in claim 25, further comprising a leveling agent. A dye bath as defined in claim 25, wherein said maleate diester has the following formula: ##STR7## wherein RThe present invention is generally directed to a process for dyeing various substrates and materials.Unfortunately, however, once in contact with the cationic polymer surface, acid dyes have a tendency to poorly diffuse into the polyamide.

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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Acid donor for dyeing polyamide huntsman trade name

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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.

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Acid donor for dyeing polyamide huntsman trade name 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.

Acid donor for dyeing polyamide huntsman trade name

 

 

 

 

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