Leather Chemicals



	An improved process for the preparation of a tanning agent
	Process for preparing a synthetic Aluminium tanning agent
	A process for the preparation of a synthetic tanning agent (Formaldehyde free)
	A process for the preparation of a tanning cum dyeing agent

	An improved process for the preparation of a tanning agent The invention relates to a Chromium-Silica compound, prepared by reacting a monovalent cation of hexavalent chromium with a silica salt followed by complexation with organic ligands. The product finds potential application in leather processing industry predominantly as a self tanning agent. It produces leathers with shrinkage temperature of more than 105oC. The resulting leathers exhibit excellent softness, suppleness, stretch, fluffy grain with smooth surface as well as good strength. The invention has been applied for Patent protection (Indian Patent application no. 770DEL2000; Patent pending). A process for the preparation of a novel synthetic tanning agent The process provides a formaldehyde free organo-chrome complex, which is prepared using aromatic polymeric matrix and trivalent chromium salts along with suitable masking agents. The complex can be used as a self-tanning agent for delimed pelts, whereby the conventional pickling process can be completely eliminated. Moreover, the exhaustion of chromium in tanning is enhanced. The product may also be used for retanning to impart excellent fullness to final leather. The tanned leathers exhibit shrinkage temperature of more than 110oC. Owing to the fact that the use of formaldehyde is avoided in the process, this product offers one of the suitable options for eco-friendly tannage of leather. The invention has been applied for Patent protection (Indian Patent application no. 906DEL2000; Patent pending). The technology has already been commercialized. A process for the preparation of a tanning cum dyeing agent A process for the preparation of a tanning cum dyeing agent is disclosed whereby the hydrolysable tannin, leached out from a plant material is reacted with iron salt to get a solution capable of being used as tanning cum dyeing agent in leather processing. The product may optionally be dried conventionally to get the product in powder form. The invention has been applied for Patent protection (Indian Patent application no. 324DEL2004;Patent pending).


	A process for the preparation of plant based acrylate composite
	Process for the preparation of a formaldehyde-free synthetic tanning agent The process has been transferred and commercializedsuccessfully in India.
	An improved process for the preparation of a tannaing agent
	An improved process for the preparation of jatropha oil--acrylic co-polymer for tanning applications

	A process for the preparation of plant based acrylate composite The process provides a method of preparation of a composite, whereby alkyl acrylate is polymerized with selected leached plant material. The product has enormous potential application as tanning agent in leather processing industry, thereby suggesting an economical option for utilizing plant materials for eco-benign industrial purpose. The leather produced by using the composite exhibits softness, grain tightness and hydrothermal stability. The invention has been applied for Patent protection (Indian Patent application no. 1057DEL2001;Patent pending) An improved process for the preparation of a tanning agent. A process for the preparation of a tanning agent is provided whereby gallic acid, which is conventionally not a tanning agent, is treated with organic crosslinker to obtain tanning agent for application in leather process industry. The invention has been applied for Patent protection (Indian Patent application no. 319DEL2004). An improved process for the preparation of jatropha oil--acrylic co-polymer for tanning applications The invention relates to in-situ polymerization of acrylic monomer and grafting the resulting polymer onto the jatropha oil backbone without losing the tanning activity of the oil. The resulting polymer finds application as tanning agent in leather processing industry. The product may also be used as a lubricating agent for leather. It has also potential application in textile and surface coating industries. The unique feature of the process is that the resulting product is aqueous based and hence eco friendly. Moreover, jatropha oil, the main constituent, is a naturally renewable resource. The invention has been applied for patent protection (Indian patent application no. 663Del2006; patent pending)


	A process for the preparation of a novel proteinoid-acrylate composite having molecular weight in the range of 15000-20000 KD
	A process for the preparation of a novel proteinoid for industrial applications
	A tanning composition and a process for the preparation thereof
	Process for the preparation of bio-tanning agent

	A process for the preparation of a novel proteinoid-acrylate composite having molecular weight in the range of 15000-20000 KD. The process essentially provides a proteinoid acrylate composite for application as filler cum syntan in leather processing industry. The preparation process of the product involves copolymerisation of protein hydrolysate with acrylic resin to obtain a composite of molecular weight in the range of 15000-20000 KD. The product finds potential application in post tanning wet operations to get excellent filling effect, grain tightness as well as softness in the finished leather. It also ensures exhaustion of dye bath to the tune of 98%. Moreover, the leather processed by this product becomes more amenable to buffing not only for producing corrected grain leather, but also for getting good nap while making suede leathers. Since the composite can withstand a temperature as high as 200oC, it can safely be used for processing even glazed finished leathers. The composite may also be effectively used as a filler in cardboard industry. Thus the invention provides an economical as well as eco-friendly option of utilizing proteinous wastes of any industry for preparing value added products. The process has been applied for Patent protection (Indian Patent application no. 210DEL2001; Patent pending). A process for the preparation of a novel proteinoid for industrial applications The process provides a method of oxidation of protein hydrolysate with organo oxidising agent which would result as aldehyde, a tanning material, having enormous potential as tannin in leather processing, thereby suggesting not only an economical option for utilizing the proteinous wastes of different industries including leather industry in useful way, but also an eco-friendly measure for leather processing using the resulting product of the present invention. The proteinoid of this invention finds potential application in leather processing industry as a tanning agentto get softness,fullness,buffing property and lightweightness to the resulting leather. It may also be used in photographic and carpentry industry. The invention has been applied for Patent protection (Indian Patent application no. 172DEL2002). A tanning composition and a process for the preparation thereof A tanning composition for application in leather processing industry has been disclosed. The invention further provides a process for the preparation of the composition. Generally, the tanned leathers are retanned with a combination of synthetic tanning agents to enhance the properties such as fullness, grain tightness, grain smoothness and roundness. Many of the chemicals that go into the preparation of such synthetic tanning agents are toxic and slow biodegradable. Further, in industrial practice, several synthetic tanning agents are combined to obtain a desired property. In the present invention, a synthetic tanning agent using natural and proteinous waste materials is disclosed, which provides to the leather the properties such as better fibre lubrication, filling of looser ends, softness, shape retention and fabrication comforts without combining with other synthetic tanning agents. The invention has been applied for Patent protection (Indian Patent application no. 0648DEL2007).

	Nano sized sulfide compound of Cerium and a process for the preparation thereof.
	An improved process for the preparation of a novel graft copolymer having molecular weight upto 300 000
	An improved process for the preparation of wax emulsion
	An improved process for the preparation of a novel graft copolymer having molecular weight upto 300 000 The process relates to the use of serum, which is discarded as waste adding to environmental pollution, for preparing protein-acrylate graft copolymer, having such properties as are necessary for being used as film forming thermostable binder in leather finishing formulations for resin or glaze finish. The binder results in good lusture without masking the grain pattern. The polymer has also application as coating agent in paint industry. The invention provides a simple option not only for effective utilization of a waste, but also for preparing a good auxiliary for industrial applications. The process has been applied for Patent protection (Indian Patent application no. 787DEL2000; Patent pending).

An improved process for the preparation of wax emulsion.

Inert wax is emulsified using long chain alcohols for preparation of auxiliaries used in leather finishing. These wax emulsions are superior to other conventional wax emulsions in terms of properties.

The invention has been applied for Patent protection (Indian Patent application no. 199DEL2004;Patent pending).


	A process for the preparation of poly(acyl sulfide) for industrial applications
	A process for the preparation of novel polysulfide copolymers.

	A process for the preparation of poly(acyl sulfide) for industrial applications. A process for the preparation of poly(acyl sulfide) is disclosed whereby acid dichloride is condensed with alkali metal sulfide in presence of phase transfer catalyst, thereby forming the polymer in one step reaction. The polymer of the invention finds enormous potential application as adhesive in footwear and leather goods industry. It may also be used as fuel binder in rocket propellant. The invention has been applied for Patent protection (Indian Patent application no. 0751DEL2002; Patent pending). A process for the preparation of novel polysulfide copolymers. A process for the preparation of novel polysulphide copolymers is provided whereby styrene dibromide is polymerized with ethelene/methylene dibromide in presence of sodium/potassium sulfide using phase transfer catalyst. The polysulfide co-polymers prepared by this new process exhibit melting point in the range of 59-125oC and are soluble in organic solvents thereby ensuring their easy processability for industrial applications. These polymers find potential applications in footwear, leather goods and allied industries as adhesive. These may also find potential application in the works pertaining to construction and maintenance of concrete structures such as highways, airport runways. Moreover, they are envisaged to have several applications as sealant in aircraft industry. The polymer may also be used as insulator in electrical industry. The invention has been applied for Patent protection (Indian Patent application no. 1010DEL2001;Patent pending)