US 6,783,719 B2 · Mold with metal oxide surface compatible with ionic release agents

Abstract

A method and a system for fabricating articles made from thermoset resins using an ionic mold release agent. The invention uses a mold having a metal oxide surface with enhanced mold release characteristics. The release agent is applied internally in the resin composition or externally on the metal oxide surface. The method includes providing a mold, forming a metal oxide surface on the mold, providing an ionic release agent, providing the acid or base conjugate of the release agent at the metal oxide surface, providing a thermoset resin in the mold, and curing the resin in the mold. A method of using float glass having a SnO2 enriched surface, wherein the method includes the steps of providing an ionic release agent externally to the tin oxide surface, is also disclosed.

Claims36

Dependent claims

A method of fabricating a thermoset article from a mold, comprising:

providing a mold having a metal oxide coating on at least one surface;
treating the mold with a solution comprising an ionic release agent, wherein the solution has a pH that induces an attracting charge on the metal oxide surface, wherein said charge is opposite to the charge of the release agent to bond the release agent to the metal oxide surface;
providing a thermoset resin mixture in the mold;
and
curing the resin mixture in the mold.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

09/785,667Filed 16 Feb 2001 · continuation in part

Priority

19 Jan 2001

Published

US 2002/0135099 A126 Sep 2002

Granted

31 Aug 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

B06B 3/02
Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency: involving a change of…
B29C 33/58
Coatings , e.g. enameled or galvanised; Releasing, lubricating or separating agents: applying the releasing agents
B29C 43/021
Of articles of definite length, i.e. discrete articles: characterised by the shape of the surface
B29C 43/36
Component parts, details or accessories; Auxiliary operations: moulds for making articles of definite length, i.e. discrete articles

Mold with metal oxide surface compatible with ionic release agents

Life of this patent

Mold with metal oxide surface compatible with ionic release agents

Life of this patent

Abstract

Claims36