Polyether-Polyacetal Polyols

Patent Title: POLYETHER-ACETAL POLYOL COMPOSITIONS

Number/Link: WO2016/112274

Applicant/Assignee: Dow

Publication date: 14-07-2016

“Gist”: Lewis-acid catalysis for polyactal-modified polyethers

Why it is interesting: According to this application, acetal-modified polyether polyols can be prepared by first reacting a (pref.) di- or trifunctional initiator with PO until about 500 eq. wt. using DMC catalysis. This ‘starter’ polyol is then further reacted (at a lower temperature) with PO using a (pref.) Boron-based lewis acid as catalyst, e.g. tris(pentafluorophenyl)borane. Under these conditions part of the epoxy will isomerize to the corresponding aldehyde. The aldehyde can then co-polymerize such that part of the polyol will be functionalized with polyacetal. Polyurethanes prepared with these polyols are said to show improved modulus and other mechanical properties.

tris(pentafluorophenyl)borane

NOPs from GMOs

Patent Title: Low Polyunsaturated Fatty Acid Oils and Uses Thereof

Number/Link: US20160194584

Applicant/Assignee: Solazyme

Publication date: 7-07-2016

“Gist”: Natural oil polyols from genetically modified organisms

Why it is interesting: Natural oils usually contain significant (and variable) amounts of polyunsaturated fatty acids, i.e. fatty acids with more than one double bond in the backbone. Soybean oil for example contains up to 60% PUFAs that can easily engage in side reactions like autooxidation and polymerization, resulting in side products that contaminate the oil – and therefore the polyols derived from them. According to this (299 page) application, oils containing >85% oleic acid and very low PUFA concentration can be made from certain genetically modified microalgae. Polyols derived from these oils by hydroxylation can be used to prepare polyurethane foams with reduced discolorouration, reduced odour, improved reproducibility and improved physical properties as compared to foams based on conventional NOPs.

Trigliceride with PUFA

2 Comments

by Gerhard Bleys on July 11, 2016 • Permalink

Posted in Flexible Foams, Polyols

Tagged bio-based materials, discoloration, Environment, GMO, NOP polyols, odor, polyester polyol, renewable materials

Posted by Gerhard Bleys on July 11, 2016

https://purpatents.com/2016/07/11/nops-from-gmos/

Polyurethane Elastomer with High Dielectric Constant

Patent Title: DIPOLE-MODIFIED POLYURETHANE, METHOD FOR PRODUCING SAME, AND USE THEREOF IN THE PRODUCTION OF CAST ELECTROACTIVE POLYURETHANE-BASED ELASTOMER FILMS

Number/Link: WO2016102320 (German)

Applicant/Assignee: Covestro

Publication date: 30-06-2016

“Gist”: A molecule with high dipole moment is incorparted in the PU backbone

Why it is interesting: According to this invention a polyurethane with an increased dielectric constant can be prepared by first reacting an isocyanate (f>2)with a hydroxyl-functional dipole. This ‘dipole-modified’ isocyanate is then used in a (preferred) amount of 5-10% on the rest of the isocyanate of an elastomer formulation. The dipole is of the form HO-R-D-X-A, where D is an electron donor, A is an electron acceptor and X is a residue with a delocalized electron system. In an example N-2-hydroxyethyl-N-methyl-4-nitroanilin is reacted with a biuret based on HDI to make the ‘dipole-modified’ isocyanate. Polyurethane elastomer films with high dielectric constant can be used as electromechanical transducers in sensors, actuators, artifical muscle etc..

N-2-Hydroxyethyl-N-Methyl-4-Nitroanilin

Innovation in Polyurethanes

Polyether-Polyacetal Polyols

NOPs from GMOs

Polyurethane Elastomer with High Dielectric Constant

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