PRODUCT FOR PELT CONDITIONING FOR TANNING: PROCESS FOR PELT CONDITIONING AND FOLLOWING TANNING

The present invention is related to the use of a new conditioning agent for treating pelts for tanning. This conditioning agent consists in a composition of modified aldehydes, carboxylic acids or polycarboxylic acids and additives. The conditioning agent is used for replacing the steps of deliming and pickling in the pelts treatment. The action of the product can eliminate the step of basification when the tanning is made with chromium salts. The objective of the present invention is the use of a novel composition that can replace the steps of deliming, step 6, and pickling, step 8, described before for one just step called conditioning The proposed system, neutralizes the alkalinity and hence removes the solubility of Calcium from the liming operation attached in the pelt. The system described is obtained from functional aldehydes with the general formulation as following: The system comprises functional aldehydes to which are added a combination or just one of the following chemicals: mono, di, tri and polycarboxilic acids; anhydrides: fumaric, maleic and ftalic anhydrides of dicarboxilic acids that contains at least 2 to 8 carbon atoms; esters of mono, di, tri and polycarboxilic acids; EDTA; boric acid and sodium and calcium tripolyphosphates As solvents to stabilize the system it is used one or a mixture of the following compounds: water, branched or non-branched aliphatic alcohol, glycols and polyols. La presente invencion se refiere a la utilizacion de agente condicionante para preparar pieles para el curtimiento. El agente condicionante consiste en una combinacion de aldehidos modificados, acidos carboxilicos o policarboxilicos y coadyuvantes. Se utiliza el agente condicionante en sustitucion a las etapas de desencalado y piquel, en el procesamiento de pieles. La accion del producto permite eliminar la etapa de basificacion cuando se realiza el curtimiento con sales de cromo. El objcto de la presente invencion es la utilizacion de un nuevo producto que permite sustituir las etapas de desencalado (etapa 6) y piquel (etapa 8) descritas anteriormente, por una sola etapa, denominada condicionamiento. E producto propuesto neutraliza la alcalinidad con consecuente remocion y solubilidad del calcio (proveniente del calero) que contiene la piel. Se obtiene el producto que se trata a partir de aldehidos funcionales que tengan la formula general a continuacion: donde H, OH, CO2H, C02R3, COR3, 0R3 R2 OH, Ci, F, COR3 = CH2+1 N 1 a 10 Se agrega al producto comp