Process for producing composite elements

US9475220B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Olaf Jacobmeier · Lüdenscheid, DE
• Gunnar Kampf · Bohmte, DE

Key dates

• Filing date: Feb 10, 2014
• Grant date: Oct 25, 2016
• Expiry date: Apr 29, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B32B2509/10
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to an improved process for producing composite elements comprising at least one outer layer and at least one isocyanate-based rigid foam layer by means of a fixed applicator apparatus and in which the flowable starting material comprises the following components: A) at least one polyisocyanate, B) at least one compound which reacts with isocyanate groups to form urethane, C) at least one blowing agent, D) catalysts comprising at least one compound D1) which catalyzes isocyanurate formation and at least one compound D2) which catalyzes polyurethane formation, comprising at least one amino group, and E) optionally auxiliaries and additives, where the manner of use of component A) and of component B) is such that the isocyanate index is at least 180, and where the ratio by weight of the compound D2) to the compound D1) is from 0.75 to 8.