Process for the preparation of laminates

Details Process for the preparation of laminates Process for the preparation of laminates

1990-08-23

1991-12-17

Woo, Jay H.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Including interlaminar mechanical fastener

428236, 428245, 428285, 428286, 522 81, 264 22, 264258, 156242, B29C 4302, B29C 4320, B29C 4330

Patent

active

050734385

ABSTRACT:
A laminate prepared by combining at least two layers wherein at least one of which is made of a fibrous material, an epoxy resin having on average at least two 1,2-epoxide groups per molecule or a mixture of these epoxy resins and a ferrocene derivative of the formula [R.sup.1 (Fe.sup.II R.sup.2).sub.a ].sup.ab+ ab.[X].sup.-, wherein a and b independently of one another are 1 or 2, R.sup.1 is a .pi.-arene, R.sup.2 is a .pi.-arene or an indenyl- or cyclopentadienyl anion, X.sup..crclbar. is an anion [LQ.sub.m ].sup..crclbar. or an anion of a partly fluorinated or perfluorinated aliphatic or aromatic sulfonic acid, L is P, As or Sb, Q is fluorine or some of the Q substituents may also be hydroxyl groups, and m corresponds to a value which exceeds the valence of L by unity, subjecting the layers to compression molding at such a temperature and pressure that a liquid resin matrix is present at the beginning of this step and an initial fall in the viscosity is produced so that entrained gases can escape from the layers and crosslinking the laminated layers to obtain a rapid rise in viscosity such that the resin which flows out does not bind the compression mold.

REFERENCES:
patent: 4252592 (1981-02-01), Green
patent: 4252593 (1981-02-01), Green

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