Texaco Development Corporation

Texaco Inc.

Texaco Chemical Company

Jefferson Chemical Company, Inc.

Harold G Waddill

Heinz Schulze

George P Speranza

Kathy B Sellstrom

Robert L Zimmerman

Michael Cuscurida

Wei-Yang Su

Jiang-Jen Lin

Howard P Klein

Ernest L Yeakey

Terry L Renken

Philip H Moss

Edward T Marquis

Lewis W Watts, Jr

John M Larkin

David R McCoy

Richard J Dominguez

Bruce W Peterson

Robert A Grigsby, Jr

An epoxy resin composition comprises the cured reaction product of an epoxy resin and a lactone-imidazole complex. For example, complexes of butyrolactone and caprolactone with 1-isopropyl-2-methyl imidazole were formed wherein the mole ratio of lactone:imidazole ranged from 1:1 to 2:1. The complexes are less reactive than the imidazole alone, giving them an extended pot life. The compositions are useful for making filament windings where an extended working time is required. Other applications include those in which it would be impractical to use the more reactive unmodified imidazole as the sole curing agent.

Epoxy resin curatives and method using lactone-imidazole complexes

Disclosed is a novel polyetherdiamine comprising an aminated, alkoxylated 1-2'-hydroxyethyl-2-imidazolidone represented by the formula: ##STR1## where R is H or an alkyl group of from 1 to 16 carbon atoms and a+b=n, wherein n is a number from about 2 to 80, and to its use in epoxy resin curing systems to produce compositions having improved strength and flexibility properties compared with currently available polyoxyalkylenediamine curatives of equivalent weight.

Heimd-containing polyetheramine curative for flexible, toughened products

The invention is an epoxy resin adhesive composition. The composition comprises:

Epoxy adhesives containing aminated, long chain monoepoxide capped

An epoxy resin curative composition that provides cured epoxy resins exhibiting improved properties is disclosed. The curative composition comprises a mixture of 1-isopropyl-2-aryl imidazole and 1-isopropyl-2-aryl imidazoline.

Mixtures of 1-isopropyl-2-aryl imidazole and 1-isopropyl-2-aryl

An epoxy resin composition comprises an vicinal polyepoxide and a Mannich condensation reaction product curing agent. The curing agent is the Mannich condensation reaction product of a phenol, formaldehyde and a polyoxyethylenediamine of the formula:

Epoxy resin compositions

A compound of the formula: ##STR1## where each of the R groups are the same and include a C.sub.1 to C.sub.4 alkyl and R' is either ##STR2## where x is a number from 2 to 10 is disclosed. The use of the prescribed component as a light, heat and oxidation stabilizer in polyurea, polyurethane and polyurethane-urea elastomers, as well as epoxy systems, is also disclosed.

Polyoxyalkyleneamines containing tetraalkylpiperidine functionality and

4-Methyl-2-morpholinone is an excellent catalytic curing agent for epoxy resins. The compound is also an accelerator when combined with standard epoxy resin curing agents.

4-methyl-2-morpholinone as a curative for epoxy resin compositions

Disclosed is an epoxy resin curative exhibiting extended pot life, lower reactivity and lower viscosity at ambient temperatures and increased reactivity at moderately elevated temperatures which comprises from 1 to 10 parts by weight of the ortho, meta or para form of 1-isopropyl-2-tolylimidazole per 100 parts by weight epoxy resin. The latent reactive properties make the curative potentially useful in a variety of applications.

1-isopropyl-2-tolylimidazole as an epoxy resin curative

An epoxy polyurethane.polyurea product having improved impact properties is formed by reacting a curing amount of a polyetherpolyamine such as, for example, an amine terminated ethylene glycol with blends of epoxy resins combined with small amounts of blocked polyoxypropylene polyol/isocyanate.prepolymer. The products of the instant invention exhibit improvements over similar blends cured with other amine curing agents which result in brittle products.

Epoxy polyurethane polyureas from epoxy resin, blocked isocyanate

A polymer concrete system has been discovered which is useful in road overlay and repair in both wet and dry conditions. The binder for this aggregate-filled system consists of a liquid epoxy resin and triethyleneglycol diamine or tetraethylene glycol diamine combined with polyoxypropylene glycol diamine curing agent. A piperazine accelerator ensures adequate strength development after short cure times at ambient temperatures. The binder-aggregate system is relative flexible, has excellent compression and flexural strength and adheres well to the substrate. The system is distinguished by its binding strength to smooth or rough surfaces whether the surfaces are wet or dry.

Polymer concrete composition for cementitious road repair and overlay on

Disclosed in an epoxy resin curative exhibiting extended pot life, lower reactivity at ambient temperatures and increased reactivity at moderately elevated temperatures which comprises from 2 to 10 parts by weight of 1-isopropyl-2-methyl imidazole salicylate per 100 parts by weight epoxy resin. The latent reactive properties make the curative potentially useful in a variety of applications.

Salicylate of 1-isopropyl-2-methyl imidazole as an epoxy resin curative

Disclosed is an epoxy resin curative exhibiting extended pot life, increased resistance to heat and chemicals, lower reactivity at ambient temperatures and increased reactivity at moderately elevated temperatures which comprises from 1 to 5 parts by weight of 1-isopropyl-2-methyl imidazole per 100 parts by weight epoxy resin. The latent reactive properties make the curative potentially useful in a variety of applications.

1-isopropyl-2-methyl imidazole as an epoxy resin curative

The invention is an epoxy resin coating composition. The composition comprises:

Polyether polyamine-piperazine cured cycloaliphatic epoxy resin

A polymer concrete system has been discovered which is useful in road overlay and repair. The binder for this aggregate-filled system consists of a liquid epoxy resin and triethyleneglycol diamine or tetraethylene glycol diamine curing agent. A piperazine accelerator ensures adequate strength development after short cure times at ambient temperatures. The binder-aggregate system is relatively flexible, has excellent compression and flexural strength and adheres well to the substrate. The system is distinguished by its fast cure to a compression strength of 3000 psi which will support automotive traffic.

Growing community of inventors

Austin, TX, United States of America

Harold G Waddill