Kraton Polymers LLC

Kraton Corporation

Kraton Polymers Research B.v.

Kraton Polymers Nederland B.v.

Jason Tian

Robert Charles Bening

Ruidong Ding

Chad Reiter

Hannes Hendrik Peter Van Erp

H Jerrold Miller

Jos H M Lange

Vijay Mhetar

Xiangyun Wei

Roger Tocchetto

Jiaqi Yan

Sanesh Deshmukh

Donna Rucker

Polymers are obtained by polymerizing in the presence of a Bronsted acid or a Lewis acid catalyst, a monomer comprising a 1,3-diisoalkenylarene, a 1,4-diisoalkenylarene, or mixtures thereof. The polymer comprises at least one of repeat units (A), (B), (C), and (D); wherein Ris H or a C1-C8 alkyl group. The polymers have high Tand exhibit good solubility in non-polar solvents, forming substantially gel-free solutions. The polymers are useful for producing crosslinked materials having good physical properties. The crosslinked materials are valuable for further downstream uses, such as copper clad laminates.

Polymers based on diisoalkenylarenes and uses thereof

The disclosure relates to methods for producing poly(cyclohexadiene) homopolymers (PCHD). The PCHD is formed by polymerizing a 1,3-cyclohexadiene monomer in the presence of a catalyst, in a hydrocarbon solvent, and at a temperature of −100° C. to 120° C. The catalyst is selected from the group consisting of a Bronsted acid, a Lewis acid, and combinations thereof. PCHD produced under these conditions has good solubility in non-polar solvents, and a number average molecular weight of 300 to 5,000 Dalton; a weight average molecular weight of 5,000 to 15,000 Delton; and a polydispersity index of 3.0 to 8.0. The PCHD is useful for producing crosslinked materials having good physical properties. The crosslinked materials can be combined with a rubbery polymer to produce compositions valuable for further downstream uses.

Poly(cyclohexadiene) homopolymer based compositions and uses thereof

Disclosed herein are copolymers formed by cationic polymerization of one or more cyclic dienes and a comonomer selected from the group consisting of a monoterpene, a branched styrene, and combinations thereof, in the presence of a catalyst. Random copolymers having repeat units derived from a cyclic conjugated diene, such as 1,3-cyclohexadiene, and a comonomer such as a monoterpene, can be prepared as soluble products in hydrocarbon solvents. The copolymers can be crosslinked with various crosslinking agents to form materials having good oxidative stability and fire retardancy. The uncrosslinked and crosslinked copolymers have useful properties such as a low dissipation factor, low dielectric constants, and a good balance of thermomechanical and electrical properties that make them valuable in electronic applications.

Cyclic diene-based copolymers

A process for deodorizing a rosin ester composition is disclosed. The process employs an adsorptive bed containing an adsorbent material. The adsorbent material comprises silica adsorbent having an average pore size between 50-200 &#x212b;, BET surface area of at least 300 m/g, pore volume of 1.20 to 3.00 cc/g, and a silanol [Si&#x2014;OH] level of 0.5 to 5 unit/nm. The deodorized rosin ester composition has an odor intensity reduction of at least 1 unit on odor intensity scale of Offensive Odor Control Act as compared to the rosin ester feedstock. In embodiment, the deodorizing treatment comprises using multi-staged adsorbent system with an adsorbent column having multiple layers of different adsorbent materials.

Deodorized rosin ester and methods for making

A plasticized PVC composition free of phthalate and having low color is disclosed. The composition comprises a morpholide plasticizer prepared from a fatty acid selected from a tall oil fatty acid, a tall oil fatty acid monomer derived therefrom, and mixtures thereof. The fatty acid has a total carbon footprint of &#x3c;95% of the total carbon footprint of a fatty acid obtained from a vegetable oil. The morpholide is prepared from the reaction of a tall oil fatty acid with morpholine in the presence of a catalyst.

PVC plasticizers and methods for making thereof

A process for reducing or removing at least 90% of sulfur in a tall oil composition, e.g., to a level of 15 ppm or less is disclosed. The process employs at least a first desulfurization and a second desulfurization treatment in parallel or in series. The first treatment comprises adsorptive desulfurization, wherein the adsorbent material comprises silica adsorbent having an average pore size between 50-200 &#x212b;, BET surface area of at least 300 m/g, pore volume of 1.20 to 3.00 cc/g, and a silanol [Si&#x2014;OH] level of 0.5 to 5 unit/nm. The second desulfurization treatment is selected from adsorptive treatment, heat treatment, distillation, extraction, oxidation, reduction, hydrogenation, and sulfur scavenging for a reduced sulfur content.

Growing community of inventors

Houston, TX, United States of America

Jason Tian