Societe Chimique Des Charbonnages S.a.

Norsolor

Societe Chimique Des Charbonnages

Societe Chimiques Des Charbonnages

Societe Chimiques Des Charbonnages S.a.

Societe Chimique Des Charbonnages Cdf Chimie, S.a.

Nicolas Meyer

Michel Cousin

Francois Boinot

Andre Hochin

Raymond Foulon

Leon Schuller

Gilbert Wollaert

Phenolic resin compositions. Phenolic resin compositions containing an additive consisting of at least 20% by weight of an alkaline or alkaline-earth metaborate relative to the toal weight of the additive. Applications to the manufacture of phenolic prepreg mats which are stable in storage.

Phenolic resin compositions suitable for the manufacture of prepreg mats

Phenolic resin compositions. Phenolic resin compositions containing an additive consisting of at least 20% by weight of an alkaline or alkaline-earth metaborate relative to the total weight of the additive. Applications to the manufacture of phenolic pre-preg mats which are stable in storage.

Phenolic resin compositions

Phenolic resin compositions. Phenolic resin compositions containing an additive consisting of at least 20% by weight of an alkaline or alkaline-earth metaborate relative to the total weight of the additive. Applications to the manufacture of phenolic prepreg mats which are stable in storage.

New phenolic resin compositions

Reinforced phenolic laminates are provided with a finishing coat of a butylated phenol-formaldehyde resin, thereby removing surface irregularities. The finishing coat can be mass-pigmented to the desired color, thereby obviating the necessity of any additional color-containing coatings.

Laminates having an improved finishing layer

In a process for hardening phenol-formaldehyde resol resins, comprising conducting the hardening of the resins with an acidic solution of water and/or an organic solvent having dissolved therein an aromatic sulphonic acid and/or concentrated sulphuric acid, the improvement comprising the hardening in the presence of aniline added to the phenolic resin beforehand in a quantity of between about 0.5 and 2% relative to the weight of the phenolic resin whereby the pot life is extended and the cure time is satisfactory, the resultant products being especially useful as prepegs.

Hardening phenol-formaldehyde resols in the presence of aniline

A continuous process for manufacturing quick-setting phenolic foams is improved by using as the hardening agent a concentrated, substantially anhydrous solution of boron trioxide, and using as the blowing agent an organic liquid having a boiling point of 20.degree.-80.degree. C. Curing times are shortened and the resultant foam, having uniformly molecularly dispersed therein about 0.25-10.5% by weight of boron, calculated as boric anhydride, has substantially uniform cells, improved fire resistance characteristics and superior mechanical properties.

Continuous process for the manufacture of quick-setting phenolic foams

There are obtained laminates of improved fire resistance comprising a substrate of reinforced phenolic resin, directly coated on at least one side thereof with a surface layer of a furan resin, and bonded to the outer surface of the furan resin a 'gel-coat' of an unsaturated polyester resin, wherein the furan resin contains boron in sufficient amounts to impart an improved fire resistance to the laminates as compared to the fire resistance of the outer surface gel-coat. The boron is introduced as boric anhydride by use of a substantially anhydrous boric anhydride hardener solution to harden the furan resin.

Laminates of improved fire resistance

Furan resins of improved fire resistance are produced by curing the resins with a substantially anhydrous solution of boric anhydride, an organic solvent and a concentrated acid.

Furan resins of improved fire resistance

Concentrated boric anhydride solutions containing more than 5% of boric anhydride in an organic solvent selected from mono or polyalcohols, trialkylborate and/or dialkylacetal when the solvent also contains an acid selected from sulfuric acid and/or aromatic acids. These solutions are used as hardeners of formo-phenolic resols, more particularly for the manufacture of laminates comprising glass fibers and formo-phenolic resols.

Boric anhydride solutions and their use as hardeners of resols

In reinforced phenolic resin laminates coated with a surface layer on at least one side, the improvement wherein said surface layer consists essentially of a furan resin coating which is directly bonded to the reinforced phenolic resin laminate, thereby removing surface irregularities in the resultant laminate.

Growing community of inventors

Bully les Mines, France

Nicolas Meyer