The present invention is directed to an improved process for preparing higher molecular weight polyepoxides from lower molecular weight polyepoxides which comprises reacting (1) a lower molecular weight polyepoxide, (2) a polyhydric compound, (3) an etherification catalyst and (4) dimethylol propionic acid.
The present invention is directed to epoxy curing agents prepared by reacting a polyhydric phenol with a hexa-alkyl ether of hexamethylol melamine in an amount to provide at least two phenolic hydroxyl groups to one methoxy group. The invention is further directed to curable epoxy compositions.
Mark F. Dante - Houston TX Roy A. Allen - Houston TX
Assignee:
Shell Oil Company - Houston TX
International Classification:
C08G 5950
US Classification:
528111
Abstract:
An adduct suitable for curing epoxy resins, particularly in water-borne systems, comprises first reacting an epoxy resin, preferably a saturated epoxy resin, with a primary monoamine and then reacting the resulting condensate with a polyfunctional amine.
The present invention is directed to a curable composition comprising (1) a solid epoxy composition prepared by reacting (a) a solid epoxy resin prepared by reacting a normally liquid epoxy resin with a polyhydric phenol in the presence of an etherification catalyst with (b) a small amount of tris(hydroxymethyl) aminomethane and (2) at least one epoxy curing agent.
Roy A. Allen - Houston TX LeRoy W. Scott - Houston TX
Assignee:
Shell Oil Company - Houston TX
International Classification:
C08L 6106 C08L 6300
US Classification:
260 293
Abstract:
Hydrolytically-stable, water-soluble curable coating compositions are prepared by (1) condensing an epoxy resin with an amino-substituted aromatic carboxylic acid, preferably an amino-substituted benzoic acid, and then (2) essentially neutralizing the condensate with an amine, preferably a tertiary amine such as triethylamine and dimethylethanol amine or ammonia.
Roy A. Allen - Houston TX LeRoy W. Scott - Houston TX
Assignee:
Shell Oil Company - Houston TX
International Classification:
C08G 5952
US Classification:
528 99
Abstract:
Adducts of epoxy compounds with amino-substituted aromatic carboxylic acids are described. These carboxyl-containing adducts may be cured with conventional epoxy curing agents or solubilized to prepare aqueous coating systems.
Roy A. Allen - Houston TX Leroy W. Scott - Houston TX
Assignee:
Shell Oil Company - Houston TX
International Classification:
C08L 6106 C08L 6300
US Classification:
260 293
Abstract:
Hydrolytically-stable, water-soluble, curable coating compositions are prepared by (1) condensing an excess of a lower molecular weight epoxy resin with an amino-substituted benzoic acid, (2) reacting the terminal epoxide groups of the resulting condensate with a secondary amine and then (3) solubilizing the product by neutralizing or reacting the carboxyl groups with a tertiary amine or ammonia.
Strait Protection / Las Vegas NV - Owner/Consultant
Education:
TX ST Univ - Criminal Justice & Political Science
About:
I have already achieved so much, and will continue to achieve great things in life, step by step...carried forward by the knowledge I have improved and are continually improving. ...
Tagline:
Security Consultant / Executive Protection / Body Guard / Business Development
"I take your point about Benitez (as made here and on the pod); Chelsea should be challenging for the title," says Roy Allen. "But I feel your criticisms would be more valid had Benitez been there for the whole season. Taking over a top team mid season can't be easy, as there is less margin for erro
Anyway, MBMs don't have enough Golf Satire for my money. Golf Satire, anyone? "Ah Scott," sighs Roy Allen. "After the most wonderful sporting event imaginable last weekend, you're now back to mundane reality in the shape of diving, pouting, flouncing millionaires 'performing' in front of baying, s
40pm: Roy Allen is averting his perfumed nostrils and gluing himself to his plasma for the next two hours: "We already know 'the answer'. There is no doubt that playing skilful, creative, thoughtful football is a greater challenge than hurling the ball into the box hoping it bounces off someone's kn Jusint Kavanagh argues: "If Roy Allen is comparing Barcelona to Mozart, then Arsene Wegner must surely be their Salieri, the not-quite-as-talented contemporary who ends up in a lunatic asylum because his work is never quite as good, or quite as popularunless there's a plot change tonight of course