POLYURETHANE MOLDED ARTICLE AND PRODUCTION METHOD THEREOF

• Main Author: HIROKAZU YOSHIHARA
• Format: Patent
• Language: English; Spanish
• Published: 04.09.2006
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

The amount of aldehyde emitted from a polyurethane and molded articles made of a polyurethane is reduced. The reduction of aldehyde emissions from polyurethanes is achieved by including a hydrazine compound as an aldehyde-scavenger in the polyol component of the polyurethane-forming reaction mixture. The hydrazine compound is used in an amount of 0.05 to 3.0 parts by weight, based on 100 parts by weight of the polyol mixture. Aldehyde emissions from molded polyurethane articles are reduced by including a hydrazine compound in the mold coating material in an amount of from 0.1 g/m 2 to 10 g/m 2 . Se reduce la cantidad de aldehidos emitidos por un poliuretano y de articulos moldeados de un poliuretano. La reduccion de las emisiones de aldehidos por poliuretanos se logra incluyendo un compuesto de hidracina como absorbedor de aldehidos en el componente de poliol de la mezcla de reaccion que forma el poliuretano. El compuesto de hidracina se usa en una cantidad de 0,05 a 3,0 partes en peso, en base a 100 partes en peso de la mezcla de poliol. Las emisiones de aldehidos por articulos de poliuretano moldeados se reducen mediante la inclusion de un compuesto de hidracina en el material de recubrimiento del molde en una cantidad desde 0,1 g/m2 a 10 g/m2.