Separating agent and use of same for producing composite moulds

Abstract

A release agent composition is provided which contains as components: a) at least one phosphate and b) at least one compound having at least two hydroxyl groups and having a molecular weight of less than 250 g / mol, the proportion of the component a), based on the composition, being from 0.1 to 70% by weight and the proportion of component b) being from 0.5 to 90% by weight. A process for the production of composite mouldings in which the release agent composition is used, composite mouldings obtainable in a corresponding manner and the use thereof also described.

Description

technical field [0001] The present invention relates to a release agent and its use in the production of composite moldings for combining an optionally modified organic binder with a material in the form of chips, fibers, mats or granules in an open or closed mould. In particular for the reaction of cellulose-containing materials (for example wood, flax or straw), the release agent comprises at least one phosphate or phosphate ester of the formula I and an alcohol. Background technique [0002] Numerous patents and literature publications (WO 98 / 00464, US 5,008,359, US 5,140,086, US 5,204,176, US 3,440,189) disclose the optional presence or absence of catalysts, auxiliary agents and / or Extruded shaped articles called "composites", such as OSB (oriented strand board), particle board, fiberboard such as MDF or HDF board (medium or high density fibreboard) or plywood, and corkboard and moldings containing flax, straw or other cellulose-containing materials. [0003] In these ...

AI Technical Summary

Problems solved by technology

[0009] These traditional mold release agents have the disadvantage that the final molded product has dark spots on the surface, which greatly impairs its optical value

However, this inorganic solid is solid at the compression temperature and thus also leads to considerable build-up on the die

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