E.i. Dupont De Nemours and Company

Bostik, Inc.

Whittaker Corporation

Eugene G Sommerfeld

Clifford H Strolle

Paul R Noyes

James E Coughlin

Frank L Schadt, Iii

Lee R Harper

James F Matthews

Andrew P Stamegna

Donald Eugene Brasure

Frank Schadt

Jeffrey T Palumbo

Henry K Seiler

Francis C Rossitto

Dean C Burkhart

The present invention provides copolyester compositions and novel methods employing such compositions. The copolymer compositions comprise a copolyester containing a low polarity block in the copolyester backbone, thereby resulting in adhesive and coating materials that exhibit improved flow and wettablility and superior initial adhesion and retained adhesion to various substrates.

Copolyesters having improved retained adhesion

A novel class of interpenetrating polymer networks which are dispersible in conventional coating solvents is disclosed. Such dispersions are useful in preparing protective and/or decorative film coatings and are particularly useful in photosensitive or imaging formulations such as photoresists, solder masks and the like. These polymer networks are comprised of at least two interpenetrating crosslinked polymers. At least one of the polymer networks is formed by polymerization in a solvent. In one embodiment of this invention, at least one polymer network is prepared from macromers to produce a polymer system having functionalized branch or graft linear segments. The solvent dispersible interpenetrating networks of this invention are particularly useful as binders in addition polymerizable photosensitive compositions containing crosslinking monomers such as solder masks. Upon exposure to actinic radiation and suitable thermal curing, solder mask coatings of such photosensitive compositions form multiple, e.g., triple, interpenetrating polymer networks having superior toughness and flexibility.

Solvent dispersible interpenetrating polymer networks

Copolyamide adhesive compositions have a diamine component and a dicarboxylic acid component. The diamine component includes the reaction residues of at least two diamines selected from non-cyclic aliphatic diamines, cycloaliphatic diamines, and aromatic diamines. The dicarboxylic acid component includes the reaction residues of at least two dicarboxylic acids selected from non-cyclic aliphatic dicarboxylic acids, cycloaliphatic dicarboxylic acids, and aromatic dicarboxylic acids. One of the residues is mono-alkyl branched asymmetric. The composition is free from aliphatic omega aminocarboxylic acids or lactams having 12 carbon atoms or less. When one of the dicarboxylic acids is a polymerized fatty acid, the diamine component does not contain a cycloaliphatic diamine.

Copolyamide adhesive compositions containing asymmetric aliphatic

Dispersions of polymer systems comprising two normally incompatible polymer networks, one of which is held together by physical interactions and the other by chemical cross-links, the networks being catenated, are useful for making coating compositions, films and molded articles.

Catenated polymer systems

Described are adhesives formed from certain diol/higher polyol/aromatic acid/aliphatic acid branched polyesters and laminates using them.

Branched polyester adhesive compositions and method employing same

Disclosed are adhesive systems and adhesives formed from (A) hydroxyl-terminated, preferably branched, polyols containing adipic acid, (B) isocyanate-capped, polyol-based urethanes also containing adipic acid and (C) polyisocyanate cross-linking agents.

Ternary adhesive systems containing a polyester polyol, an

Disclosed are laminates and their preparation with adhesives formed from (A) hydroxyl-terminated, preferably branched, polyols, (B) isocyanate-capped, polyol-based urethanes and (C) polyisocyanate crosslinking agents.

Laminates from an adhesive formed by a system containing an

Polyester copolymers prepared by a non-equilibrium, two-stage process conducted without external catalysts have relatively high polydispersity and low viscosity, permitting the preparation of high solids paints.

Staged copolymerization of polyesters

Described are high-solids solutions of diol/higher polyol/aromatic acid/aliphawtic acid branched polyesters of carefully controlled composition and suitable as components of organic coatings.

Branched polyester coating compositions

Disclosed are adhesive systems and adhesives formed from (A) hydroxyl-terminated, preferably branched, polyols, (B) isocyanate-capped, polyol-based urethanes and (C) polyisocyanate crosslinking agents. In their preferred embodiments, they are applicable by direct gravure procedures and are useful in boil-in-bag technology.

Ternary adhesive systems

Water-borne reaction products of (a) carboxyl-functional polymers; (b) polyepoxides; and (c) tertiary amines are electrocoated to give desirable coatings. The coating compositions can be used with or without crosslinking agents and coalescing aids. The resulting coatings give improved properties, including high degree of flexibility during machining and stamping of the coated articles, corrosion resistance, gloss, hydrolytic stability, and are stable and nonadulterating in contact with foods and beverages.

Electrocoating with water-borne coating composition made from epoxy

Described are diol/higher polyol/aromatic acid/aliphatic acid branched polyesters of carefully controlled composition highly soluble in cheap, nontoxic organic solvents and suitable as components of adhesives, e.g., for bonding flexible plastics, and as components of organic coatings.

Branched polyesters for adhesives and coating compositions

Described are polyester-urethane-epoxy adhesives produced by reacting one or more diols with two or more dicarboxylic acids to form a polyester prepolymer; chain-extending the prepolymer with an organic diisocyanate to yield a hydroxy-terminated polyester-urethane; capping the urethane partially or completely with a dicarboxylic acid or anhydride of dicarboxylic acid; and finally reacting with an epichlorohydrin/bisphenol A-type epoxy resin, forming an epoxy polyester-urethane block copolymer. The resulting product may then be crosslinked in use as an adhesive.

Growing community of inventors

Penn Valley, PA, United States of America

Eugene G Sommerfeld