Henkel Corporation

Henkel IP Holding Gmbh

Wei Helen Li

Raymond S Wong

Stanley Leroy Lehmann

Bryce Floryancic

Huabing Zheng

Michael D Halbasch

Alex Chor-Yiu Wong

Xinyu Du

Noel Fuentes

Wenbo Jiang

Stanley L Lehmann

Xingyu Du

A prepreg curing process for preparing composites having superior surface finish and high fiber consolidation is provided.

Prepreg curing process for preparing composites having superior surface finish and high fiber consolidation

Curable compositions, such as oxazine-based ones, are useful in applications within the aerospace industry, such as for example as a thermosetting resin composition for use as a matrix resin in processes, such as resin transfer molding, vacuum assisted transfer molding, resin film infusion, prepregging and towpregging, where the composites or laminates so prepared have superior surface finish and high fiber consolidation.

Curable compositions, processes for using such compositions to prepare composites and processes for preparing composites having superior surface finish and high fiber consolidation

This invention relates to syntheses for the preparation of benzoxazine, including benzoxazine monomers and benzoxazime oligomers, from phenolic compounds, aldehyde compounds, and either primary diamine compounds, such as diamino alkylene compounds, e.g., methylene diamine, or diamino arylene compounds, e.g., phenylene diamine, using water, and optionally an organic solvent, as the reaction solvent.

Methods for preparing benzoxazines using aqueous solvent

Curable compositions, such as benzoxazine-based ones, are useful in applications within the aerospace industry, such as for example as a heat curable composition for use as a matrix resin in advanced processes, such as resin transfer molding, vacuum assisted transfer molding and resin film infusion, and their use in such advanced processes form the basis of the present invention.

Curable compositions for advanced processes, and products made therefrom

The present invention relates to prepregs, towpregs and preforms made from curable compositions of (a) benzoxazines, (b) a combination of adducts a first of which is prepared from hydroxy-containing compounds, isocyanate-containing compounds and phenolic compounds and the second of which is prepared from the first adduct and epoxy-containing compounds, (c) components reactive with the benzoxazine, such as epoxy resins, episulfide resins and oxetane resins, (d) tougheners, such as polyether sulfones, ATBN and core shell materials and (e) a silica component, where the silica has a mean particle diameter on the order of 10meters.

Prepregs, towpregs and preforms

Curable compositions, such as benzoxazine-based ones, are useful in applications within the aerospace industry, such as for example as a heat curable composition for use as a matrix resin or an adhesive, and form the basis of the present invention.

Nanoparticle silica filled benzoxazine compositions

Curable compositions

The present invention relates to curable compositions of benzoxazines, a combination of adducts one of which is prepared from hydroxy-containing compounds, isocyanate-containing compounds and phenolic compounds and the second of which is prepared from the first adduct and epoxy-containing compounds and phenolic compounds, epoxy resins and optionally tougheners.

The present invention relates to a prepreg laminate, constructed from a first prepreg; a second prepreg; and a thermoplastic layer therebetween. In the inventive laminate, at least one of the first prepreg or the second prepreg is made from a matrix resin comprising a benzoxazine-containing composition.

Prepreg laminates

An article of manufacture comprising a sag-resistant nucleus-forming monolithic composite capable of being located within a hollow interior portion of a structural material and being expanded therein. Also, articles of manufacture comprising open-cellular structural material containing within the open-cell or cell thereof, at least one sag-resistant nucleus-forming monolithic composite. The composite is desirably in the shape of a plug that is similar or close to similar to the shape of the hollow interior. In addition, there is described a process that comprises forming a pre-shaped sag-resistant nucleus-forming monolithic composite for use in reinforcing and stiffening a normally open-cellular structural material. Also described is a process for reinforcing or stiffening a normally open-cellular structure, any tubular structure, or any channel structure, by putting at least one sag-resistant nucleus-forming monolithic composite within a hollow interior portion of the structure. The invention is particularly desirable for stiffening and/or reinforcing honeycomb structures.

Growing community of inventors

San Ramon, CA, United States of America

Wei Helen Li