Kraton Corporation

Xavier Daniel Muyldermans

Robert Charles Bening

Erin B Murphy

Martine Dupont

Marianne Stol

Koen Van Duin

Xiangyun Wei

Catherine A L Maris

A styrenic block copolymer is disclosed, having a formula, A-B-A, A-B-B-A, (A-B-A)X, (A-B)X or mixtures thereof, wherein n is from 2 to 30, and X is residue of a coupling agent. Each A block is independently a polystyrene having 10-63 wt. % 1,1-diphenylethylene, a GPC peak molecular weight from about 5-40 kg/mol, and forms 10-40 wt. % of the copolymer. Each B block is independently a poly(1,3-diene-co-styrene) comprising: (i) &#x3e;90 wt. % of polymerized isoprene units relative to the weight of the polymerized 1,3-diene, where S is &#x3c;40, and (S+V) is 18-75; (ii) &#x3e;90 wt. % of polymerized butadiene units relative to the weight of the polymerized 1,3-diene, where S is &#x3c;40, and (1.2*S+V) is 60-120; or combinations thereof 'S' represents the polystyrene content, and 'V' represents the 1,3-diene content having pendant 1,2- and/or 3,4-vinyl groups in the B block.

Block copolymers and uses thereof

A gel composition is herein disclosed. According to one embodiment, the composition comprises a (i) a styrenic block copolymer, (ii) an oil; and (iii) optional additives; wherein the styrenic block copolymer has a structure ABi or iAB, wherein A is a monoalkenyl arene block, B is a conjugated diene block, and i is an isoprene attachment. The isoprene attachment i is substantially unsaturated and the conjugated diene block B is substantially saturated. The gel composition before curing exhibits thixotropic behavior, with a viscosity ranging from about 5000 mPa&#xb7;s to about 30000 mPa&#xb7;s. at 25&#xb0; C. and a shear rate of 20 s.

Fusible oil gel compositions and methods of making and using same

Growing community of inventors

Mont Saint Guibert, Belgium

Xavier Daniel Muyldermans