W. R. Grace Co.-conn.

Cryovac, Inc.

P T Sub Inc.

Truc-Chi T Huynh-Tran

William Peyton Roberts

Rusty Lew Blanski

Donald Albert Bansleben

Robert Howard Grubbs

Ronald J Kumpfmiller

Paul Anthony Hughes

Galen Richard Hatfield

Cynthia Louise Ebner

Srinivas K Mirle

Felek Jachimowicz

Alexander C Paton

A new and novel linear, regio-regular vicinal functionalized polymer methods of forming the same are described. The polymer has a linear hydrocarbon polymer backbone with vicinal functional groups having oxygen and/or nitrogen atom containing groups, such as hydroxy, carboxylic acid or ester, carbonyl acetate, amide, nitrile and the like, pendent from the polymer backbone chain in a regio-regular manner.

Regio-regular copolymer and methods of forming same

The present invention is directed to Packaging Materials and Packaging Articles having a structure composed of a substantially linear, regio-regular functionalized hydrocarbon polymer having C,-C,hydrocarbon polymer repeating units wherein each unit has at least one functional group uniformly pendent therefrom.

Regio-regular functionalized polymeric packaging material

A photocurable composition useful in preparing water-developable, solid printing plates is prepared by blending a urethane (meth)acrylate prepolymer with a complexing polymer based on poly(vinyl pyrrolidone) composition. The resulting composition is suitably formulated with additional photoactive (meth)acrylate monomers or oligomers and photoinitiator for casting or extrusion on a substrate to form a flexographic printing plate. Following UV exposure of the plate through a negative, unexposed areas can be removed by washing with aqueous media, to give a plate with a desirable relief image. The use of the aqueous washout solution as opposed to organic solvents minimizes pollution problems. The use of the complexing polymer significantly reduces the cold flow of the uncured plate and both increases toughness and reduces tack of the cured plate.

Photosensitive polymer composition for flexographic printing plates

A photopolymer useful in preparing water-developable, solid printing plates is prepared by preparing a urethane prepolymer by reacting polyoxyalkylene diols or polyester diols, or a mixture thereof, with an excess of diisocyanate, followed by chain extending the resulting prepolymer mixture with an alkyldialkanolamine, then reacting the chain-extended product with a hydroxyalkyl(meth)acrylate. The resulting photopolymer is suitably formulated with additional photoactive (meth)acrylate monomers or oligomers and photoinitiator for casting or extrusion on a substrate to form a flexographic printing plate. Following UV exposure of the plate through a negative, unexposed areas can be removed by washing with a slightly acidic aqueous medium, to give a plate with a desirable relief image. The use of the aqueous washout solution as opposed to organic solvents minimizes pollution problems.

Aqueous developable photosensitive polyurethane-(meth)acrylate

A photopolymer useful in preparing water-developable, solid printing plates is prepared by (A) preparing a urethane prepolymer by reacting a polyoxyalkylene diol (optionally carboxylic acid grafted) with an excess of diisocyanate, followed by chain extending the resulting prepolymer mixture with a dialkylolpropionic acid and preferably with additional diols(s) such as alkane diol(s) and (meth)acrylate-containing diol(s). Use of a new (meth)acrylate-containing diol in such chain extension completes the formation of photopolymer. However, in a third operation (B) hydroxyalkylmethacrylate may be reacted with the result of (A) whether or not (meth)acrylate-containing diol is used in (A). The carboxylic acid groups of the photopolymer may also be partially neutralized with a base. The photopolymer is suitably formulated with additional photoactive (meth)acrylate monomers or oligomers and photoinitiator for casting on a substrate or extruding to form a flexographic printing plate. Following UV exposure of the plate through a negative, unexposed areas can be removed by washing with an aqueous alkaline solution to give a plate with a desirable relief image. The use of the aqueous alkaline washout solution as opposed to organic solvents minimizes pollution problems.

Photocurable polyurethane-acrylate ionomer compositions for aqueous

A reactive plastisol composition includes a one component, solventless, storage stable, low temperature curable polyurethane composition and a thermoplast plastisol. The urethane composition is formed from a blocked isocyanate prepolymer and a curing agent. The isocyanate prepolymer is the reaction product of a polyol, a diisocyanate, and a ketoxime blocking agent. The diisocyanate has the formula ##STR1## in which R.sub.1 -R.sub.4 are each a C.sub.1 -C.sub.6 alkyl which can be linear or branched, R.sub.5 is a phenylene or naphthalene ring which is unsubstituted or substituted by one or more C.sub.1 -C.sub.12 linear or branched chained alkyl groups or halo groups, and m and n are each integers from 0 to 6. A polyurethane curing catalyst can also be used.

One package polyurethane/thermoplast plastisol composition

Poly(vinyl chloride) plastisol compositions modified with epoxy and acid anhydrides can be painted wet-on-wet with acid catalyzed, high solids enamel paints, followed by curing at 120.degree. C. or lower, to give strongly adherent products on electrodeposition coatings and dry, tack-free painted surface. The compositions are also stabilized by the addition of an imide, which provides storage stability at 40.degree. C. for more than three days.

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Burtonsville, MD, United States of America

Truc-Chi T Huynh-Tran