Shell Oil Comapny

Kraton Polymers U.S. LLC

Cornelis Martinus Van Dijk

Willem C Vonk

Paulus Alexander Grotenhuis

David J St Clair

Marc Stephen Sonderman

Kathryn J Wright

The present invention relates to gels prepared from novel anionic block copolymers of aromatic vinyl compounds and conjugated dienes. The block copolymers include a high molecular weight linear and/or radial block copolymer component (SBC1 and/or SBC2), and a diblock component (E1). The block copolymer may be combined with tackifying resins, oils and other components to form the gels of the present invention.

Gels from high molecular weight block copolymers

The present invention relates to pressure sensitive adhesive compositions prepared from novel anionic block copolymers of aromatic vinyl compounds and conjugated dienes. The block copolymers are a mixture of a high molecular weight linear and/or radial block copolymer component (SBC1 and/or SBC2), and a diblock copolymer component (D1). The block copolymer may be combined with other block copolymers, tackifying resins, oils and other components to form the adhesives of the present invention. The pressure sensitive adhesives of the present invention maintain their performance at elevated temperatures and fail cohesively making them particularly useful for die-cuttable label applications. The pressure sensitive adhesives compositions may also comprise ester plasticizers typically used for PVC and thus make adhesives particularly suitable for PVC film labels and decals.

Pressure sensitive adhesives from high molecular weight block copolymers having a high fraction of diblock copolymer

The present invention relates to articles prepared from novel anionic block copolymers of mono vinyl aromatics and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymer may be blended with at least one other polymer selected from the group consisting of olefin polymers, styrene polymers, amorphous resins and engineering thermoplastic resins.

Articles prepared from high molecular weight/low coupled block copolymers

Purifying reagent for the purification of starting materials to be used in a metal compound catalyzed polymerization, containing proton donating reactive contaminants, consisting of a solid product, obtainable by the metallation of a product of a nucleophilic displacement reaction between a halogen alkylated crosslinked poly(vinylaromatic) resin and a metallated conjugated diene compound, which product is insoluble inorganic solvents, which is not able to initiate anionic polymerization of olefins or dienes and which is able to scavenge proton donating contaminants, which may hamper polymerizations catalysted by metal organic compounds; and process for purification of starting materials applying said purifying reagent.

Process for purification of starting materials for metal catalyzed

Purifying reagent for the purification of starting materials to be used in a metal compound catalyzed polymerization, containing proton donating reactive contaminants, consisting of a solid product, obtainable by the metallation of a product of a nucleophilic displacement reaction between a halogen alkylated crosslinked poly(vinlyaromatic) resin and a metallated conjugated diene compound, which product is insoluble inorganic solvents, which is not able to initiate anionic polymerization of olefins or dienes and which is able to scavenge proton donating contaminants, which may hamper polymerizations catalysted by metal organic compounds; and process for purification of starting materials applying said purifying reagent.

A process for coagulation finishing (co)polymer by using polyvinyl alcohol as dispersant during said coagulation. In particular, low viscosity block copolymers, comprising at least one block of predominantly conjugated diene and at least one block of predominantly monovinyl aromatic monomer, can be successfully finished. The polyvinylalcohol is characterized by a weight average molecular weight of from 200 to 200,000 and by an average degree of hydrolysis of from 25 to 98%.

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Amsterdam, Netherlands

Cornelis Martinus Van Dijk