US 2011/0033646 A1Published application

Process for making fiber reinforced plastic pipe

AssigneeDow Global Technologies LLC

InventorsAsjad Shafi, Rajesh Turakhia, John Beckerdite, Michael Ross

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Abstract

An improved process for making fiber reinforced epoxy plastic structure by a process that includes the steps of : forming a structure of the reinforcing fibers (14) an epoxyresin composition (15) that includes a liquid epoxy resin and an epoxy resin hardener; and heating the structure to cure the epoxy resin composition. The epoxy resin composition including more than one and one half percent of mono hydrolyzed epoxy resin and an epoxy resin hardener so that the viscosity of the epoxy resin composition during the heating step is in a range that results in a degree of impregnation of the void space between the reinforcing fibers by the cured epoxy resin composition that is greater than ninety volume percent of the void space.

Claims9

Dependent claims

A process for making a fiber reinforced epoxy structure comprising the steps of:

(a) impregnating reinforcing fibers with an epoxy resin composition;
wherein the epoxy resin composition comprises a liquid epoxy resin and an epoxy resin hardener;
(b) winding the impregnated fibers of step (a) over a form or a mandrel ;
and
(c) curing the epoxy resin composition;
wherein the epoxy resin composition comprises more than one and one half percent of mono hydrolyzed epoxy resin;
wherein the viscosity of the epoxy resin composition during the curing is sufficient to impregnate the void space between the reinforcing fibers and the cured epoxy resin composition;
and wherein the impregnated fibers have a degree of impregnation of void space between the reinforcing fibers by the cured epoxy resin composition greater than ninety volume percent of the void space.

5 more elements

Dependencies are inferred from the claim text.