Shell Oil Comapny

Other

Kailash C Dangayach

Pen-Chung Wang

Ronald S Bauer

Kalyan Ghosh

Jimmy D Elmore

Gayle Edward Back

Houston Slade Brown

Hoe H Chuah

James R Erickson

Michael A Masse

Charles J Stark

Charles Chiu-Hsiung Hwo

Paul Karol Casey

Charles J Stark, Deceased

Rocco DiFoggio

Donald R Kelsey

Eckhard Seidel

Fritz Wilhelm

Hans Reitz

Kathleen Suzanne Kiibler

William E Ellington

Dieter Wiemer

Betty Marrou Scardino

Hansjorg Meise

By Ann E Stark, Adminstrator

Adriano Birosel Pangelinan

Michele Buscemi

A process for the production and for the winding of one polyester yarn, preferably multi-filament yarn, which comprises at least about 85 weight %, in relation to the total weight of the polyester yarn, of polytrimethylene terephthalate (PTT) wherein said process is characterized in that filaments of said polyester yarn is heat-treated, before it is wound on a bobbin, at a temperature in the range of about 70&#xb0; C. to about 180&#xb0; C. The method of accomplishing this is by heating the godets that are used in the spinning part of the process, preferably the last pair of godets, to relax the yarns so that the yarn package will not shrink significantly during storage and/or transportation. It is thus possible to obtain at least one PTT yarn package with long-term stability during storage and which is insensitive against elevated temperatures during storage and transport.

Process for making stable polytrimethylene terephthalate packages

Spin draw process of making partially oriented yarns from polytrimethylene terephthalate

Process for making high stretch and elastic knitted fabrics from polytrimethylene terephthalate

According to the invention, a polytrimethylene terephthalate is provided having 0.6 to less than 2 mole percent dipropylene glycol. Such compositions have a reduced tendency to generate acrolein when heated in air. These PTT polymer compositions exhibit improved and enhanced dyeability as compared to conventional PTT made by the DMT process and the TPA polycondensation/solid state polymerization processes.

Optimum dipropylene glycol content polytrimethylene terephthalate compositions

An aqueous system comprises at least one epoxy resin and a reaction product with an amine equivalent weight of at least 50 prepared by the reaction of an (A) epoxy-functional amidoamine derived from at least one epoxy resin and an amidoamine obtained via the reaction of an acid-terminated polyalkylene glycol and a diamine in an active hydrogen:epoxy groups ratio of from 1:15 to 1:350, with (B) at least one polyamine in an active amine hydrogen:epoxy groups equivalent ratio of from 2:1 to 30:1, and, optionally (C) a monoepoxide in a remaining active amine hydrogen:epoxy groups equivalent ratio of from 5:1 to 20:1.

Polyamine/epoxy-functional amidoamine product with epoxy resin

A water-dispersible curing agent for epoxy resins is prepared by the reaction of (a) an epoxy-functional compound obtained from the reaction of at least one epoxy resin and an amidoamine derived from the reaction of an acid-terminated polyalkylene glycol and a diamine in an active amine hydrogen:epoxy groups ratio of from 1:15 to 1:350, (b) at least one polyamine in an active amine hydrogen:epoxy groups ratio of from 2:1 to 30:1 which yields an amine-terminated product having an amine equivalent weight of at least 50, and, optionally, (c) a monoepoxy in a remaining active amine hydrogen:epoxy groups ratio of from 5:1 to

Epoxy-functional amidoamine reacted with excess polyamine and monoepoxy as epoxy curative

An aqueous epoxy resin system suitable for coatings comprises (a) water, (b) at least one epoxy resin and (c) a curing agent prepared by (i) reacting at least one polyamine having at least 3 active amine hydrogen atoms per molecule and at least one epoxy resin in an epoxy equivalent to to polyamine mole ratio of from 0.9:1 to 1:10 to obtain an amine-terminated intermediate; (ii) reacting the amine-terminated intermediate with from 0.5 to 25 weight percent, based on the amine-terminated intermediate, of an acid-terminated polyalkylene glycol to yield an amine-terminated curing agent. The amine-terminated intermediate can be capped with a monoepoxide in an amine hydrogen to epoxy groups ratio of from about 1.5:1 to 30:1 prior to reaction with the acid-terminated polyalkylene glycol, or the amine-terminated curing agent following step (ii) can be capped with a monoepoxide in an amine hydrogen atoms to epoxy groups ratio of from about 2:1 to 30:1.

Aqueous epoxy resin system with curing agent from reacting

A water-compatible curing agent for epoxy resins is prepared by (a) reacting at least one polyamine having at least 3 active amine hydrogen atoms per molecule and at least one epoxy resin in an epoxy equivalent to polyamine mole ratio of from 0.9:1 to 1:10 to obtain an amine-terminated intermediate; (b) reacting the amine-terminated intermediate with from 0.5 to 25 weight percent, based on the amine-terminated intermediate, of an acid-terminated polyalkylene glycol to yield an amine-terminated curing agent. The amine-terminated intermediate can be capped with a monoepoxide in an amine hydrogen atoms to epoxy groups ratio of from about 1.5:1 to 30:1 prior to reaction with the acid-terminated polyalkylene glycol, or the amine-terminated curing agent produced following step (b) can be capped with a monoepoxide.

Epoxy resin curing agent-reacting acid-terminated polyalkylene glycol

A polytrimethylene terephthalate composition containing about 0.1 to about 5 wt % of a polyketone can be injection molded at a low temperature and rapid molding time.

Polytrimethylene terephthalate composition

A process for incorporation of epoxidized polydienes into aromatic epoxy resins which comprises (a) blending the epoxidized polydiene into a curing agent in a ratio of 1:20 to 1:4, (b) reacting the epoxidized polydiene and a curing agent at a temperature of from 100.degree. to 150.degree. C. over a time from 10 to 100 minutes, (c) mixing the pre-reacted epoxidized polydiene and curing agent with the aromatic epoxy resin and accelerator, and (d) curing the aromatic epoxy resin by heating the full mixture of paragraph (c) to a temperature of from 110.degree. to 170.degree. C. for from 2 to 6 hours.

Process for incorporation of expoxidized polydienes into epoxy resins

The present invention provides a toughened epoxy resin composition comprising: (a) a curable aromatic epoxy resin, (b) an epoxidized low viscosity polydiene polymer wherein the polymer contains from 1.0 to 7.0 milliequivalents of epoxy per gram of polymer, and (c) a curing agent.

Composition of epoxy resin, epoxidized block polydiene and curing agent

A polysiloxane-modified epoxy-based encapsulation composition comprising an epoxy resin, a curing agent for the epoxy resin, a polylactone-polysiloxane block copolymer, and a filler is described. The powder molding compositions provide a low internal stress epoxy composition without significantly sacrificing T.sub.g.

Polysiloxane modified thermoset compositions

A process is disclosed for preparing a low-chlorine epoxy resin which employs crystallization of the epoxy from solution in a finishing step of the preparation process. The process involves (a) contacting, in a basic reaction medium, epichlorohydrin and a biphenol to produce a reaction product mixture containing a diglycidyl ether of the biphenol; (b) dissolving the diglycidyl ether in an organic solvent and, optionally, contacting the diglycidyl ether with a dehydrochlorination agent; and (c) reducing the temperature of the organic solvent so as to effect crystallization of a low-chlorine fraction of the diglycidyl ether.

Process for preparing low-chlorine epoxy resins

A process is disclosed for preparing a low-chlorine tetrafunctional epoxy resin which employs crystallization of the epoxy resin from solution in a finishing step of the preparation process. The process involves (a) contacting, in a basic reaction medium, epichlorohydrin and a tetraphenol of ethane to produce a reaction product mixture containing a polyglycidyl ether of the tetraphenol of ethane; (b) dissolving the polyglycidyl ether in an organic solvent and, optionally, contacting the polyglycidyl ether with a dehydrochlorination agent; and (c) reducing the temperature of the organic solvent so as to effect crystallization of a low-chlorine fraction of the polyglycidyl ether.

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Houston, TX, United States of America

Kailash C Dangayach