Polyurethane molded article and production method thereof
AssigneeBayer MaterialScience AG
InventorsMasafumi Nakamura, Hiroshi Ikuta, Hiroshi Itaba, Hirokazu Yoshihara
Life of this patent
Estimating the term…
Abstract
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/m2 to 10 g/m2.
Claims14
A polyurethane molded article produced by reacting (a) a polyisocyanate component, (b) a polyol component comprising a polyol, a catalyst, a cross linking agent, and (c) from 0.05 to 3.0 parts by weight, based on 100 parts by weight of polyol component, of a hydrazine compound.
A process for the production of a polyurethane article in which a polyisocyanate is reacted with a polyol component comprising a polyol, a catalyst, a cross linking agent and from 0.05 to 3.0 parts by weight, based on 100 parts by weight of polyol plus catalyst plus cross linking agent, of a hydrazine compound.
A polyurethane molded article coated with a hydrazine compound in an amount of from 0.1 g/m2 to 10 g/m2 on its surface.
Dependencies are inferred from the claim text.