The Dow Chemical Company

Exxon Chemical Patents, Inc.

Dow Global Technolgoies LLC

Exxonmobil Chemical Patents Inc.

Tsrc (usa) Investment Corporation

Michael O Myers

Mehmet Demirors

Charles F Diehl

Jean M Tancrede

Gary R Marchand

Andre J Uzee

Kenneth Lewtas

Robert A Kirchhoff

Bruce A King

Jo Ann Gilpin

Jurgen J Schroeyers

Kenneth A Toney

Jacques Bernard Lechat

Mercedes R Galobardes

Nicolas Kappes

Francois-Xavier Gibert

Gerard Marin

Marie-Noelle Cazenave

Jacques S Lechat

Christophe Derail

Cynthia Baker

Roger R Delme

Oliver J Georjon

A composition of matter that may be used to make transparent, substantially gel-free polymeric films includes at least a styrenic block copolymer and a thermoplastic resin other than the styrenic block copolymer. The styrenic block copolymer (e.g. S-I-B-S) has four distinct and sequential blocks: a first styrenic block (S), a first diene block (e.g. isoprene or I), a second diene block that differs from the first diene block (e.g. butadiene or B) and a second styrenic block (S). The styrenic block copolymer desirably lacks any random diene block (e.g. a random isoprene/butadiene block). The styrenic block copolymer also desirably lacks any significant percentage of a triblock copolymer (S-I-B). The composition of matter may also include an extender material such as white mineral oil. The compositions may be used to make mono-layer or multi-layer cast or blown films.

Styrene tetrablock copolymers and polymer blend compositions based upon such copolymers

Improved adhesives are provided through the use of styrenic radial block copolymers, containing at least 40 wt % diblock copolymers, the adhesives have improved adhesive properties and a reduced elastic behavior under die-cutting conditions. Compared to conventional linear block copolymers of similar molecular weight, radial copolymers offer higher holding power and lower melt viscosity for the adhesive. They therefore contribute to an improved balance between processability and end-use properties.

Radial block copolymers and adhesives based thereon with improved die-cutting performance

The present invention relates to a unique blend of elastomeric and thermoplastic monovinylidene aromatic-conjugated diene block copolymers, which form transparent elastomeric products.

Block copolymer composition and transparent elastomeric articles produced therefrom

Improved adhesives are provided through the use of styrenic tetrablock or pentablock copolymers which have a reduced elastomeric behavior under the die-cutting conditions used in label production.

Adhesives with improved die-cutting performance

The invention is a process for the preparation of a sulfur-containing polymer, comprising:

Process for sulfonating or sulfating polymers

Radial block copolymers characterized by the formulas: (1) (pS-pI).sub.n X and (2) (pS-pI-pB).sub.n X where pS is polystyrene, pI is polyisoprene, pB is butadiene, X is a residue of a multifunctional coupling agent used in the production of the radial block copolymer, and n is a number greater than 2 representative of the number of branches appended to X; hot-melt adhesive compositions constituted of said radial block copolymers, and articles of manufacture produced therefrom. These copolymers possess blocks of high average molecular weight polystyrene (10,000 to 25,000) and an overall average molecular weight (90,000 to 380,000) such that when blended in requisite proportions with a compatible tackifier resin, preferably also a secondary tackifying resin or plasticizing oil, and stabilizer, superior hot-melt adhesive compositions can be formed. The hot-melt adhesive compositions possess, inter alia, superior heat resistance, superior static time to failure with low viscosity, good peel adhesion, good tack, and high ability to bond to a polyethylene or polypropylene substrate at temperatures below that which may damage the substrate.

Adhesive compositions containing radial block copolymers with butadiene

Radial block copolymers containing butadiene endblock

Polystyrene-polyisoprene-polystyrene block copolymers, hot-melt adhesive compositions constituted of polystyrene-polyisoprene-polystyrene block copolymers, and articles of manufacture produced therefrom. These copolymers possess blocks of high average molecular weight polystyrene (12,000 to 20,000) and low overall average molecular weight (60,000 to 110,000) such that when blended in requisite proportions with a compatible tackifier resin, preferably also a secondary tackifying resin or plasticizing oil, and stabilizer, superior hot-melt adhesive compositions can be formed. The hot-melt adhesive compositions possess, inter alia, superior heat resistance, superior static time to failure with low viscosity, good peel adhesion, good tack, and high ability to bond to a polyethylene or polypropylene substrate at temperatures below that which may damage the substrate.

Disposable articles of manufacture containing

Polystyrene-polyisoprene-polystyrene block copolymers, hot melt adhesive

This invention relates to polyisocyanate-based polymers prepared by reacting a polyisocyanate with a polyol composition containing a polyester polyol and a poly(alkylene carbonate) polyol. The presence of the poly(alkylene carbonate) polyol improves the semi-conductive properties of the polymer without requiring the use of semi-conductive fillers or ionizable salts.

Poly(alkylene carbonate) polyols as antistatic additives for

A catalytic amount of a finely divided copper salt catalyst is added to a monomer having at least one cyclobutarene group to lower the peak temperature of the polymerization oxotherm.

Copper salts as catalysts for monomers having at least one cyclobutarene

An improved process for the preparation of poly(alkylene carbonate) polymer by the reaction of alkylene oxide with carbon dioxide and/or an alkylene carbonate at an elevated temperature and pressure is disclosed. The improvement comprises conducting said reaction in the presence of a catalyst mixture comprising an alkaline catalyst and a stannate compound.

Process for preparing poly (alkylene carbonates)

Growing community of inventors

Baton Rouge, LA, United States of America

Michael O Myers