All posts by Gerhard Bleys

Single Pot NOPs

Patent Title: METHOD OF MAKING POLYOL COMPOSITIONS

Number/Link: WO2019/028433

Applicant/Assignee: Univ. of California

Publication Date: 7 February 2019

“Gist”: Single-pot synthesis of natural-oil polyols by Prilezhaev oxidation and subsequent ring-opening of unsaturated triglycerids.

Why it is interesting: According to this invention NOPs can be prepared by reacting unsaturated natural oils with a peroxy acid. The epoxidation followed by ring opening occurs in a single reaction sequence. The peroxy acid is first prepared by reacting a small organic acid with hydrogen peroxide. In the examples high oleic algae oils are used together with e.g. oxidized lactic acid. The reaction has the advantage of being more rapid and using less toxic ingredients than current systems to prepare NOPs.

Prilezhaev reaction followed by ring-opening

Omniphobic Polyurea

Patent Title: MOISTURE-CURABLE OMNIPHOBIC COATINGS

Number/Link: US2019/0031909

Applicant/Assignee: US Navy

Publication Date: 31 January 2019

“Gist”: Polyurea topcoat containing both silane and perfluoro groups

Why it is interesting: According to this invention, a coating having both hydrophobic and oleophobic properties can be prepared by reacting an alkoxysilane-terminated polyurea with a perfluoromaterial having at least one alkoxy- or hydroxyl group. In an example a coating is prepared by reacting a polyurea based on HDI trimer and N-butyl-3-aminoppropyltrimethoxysilane with triethoxy(perfluoro-octyl)silane. The coating showed contact angles of more than 140 degrees vs water and more than 90 degrees vs hexadecane.

Reaction system according to the invention

Thermoplastic PU-PDMS Copolymer

Patent Title: THERMOPLASTIC POLYURETHANE

Number/Link: WO2019/016313 (German)

Applicant/Assignee: BASF

Publication Date: 24 January 2019

“Gist”: Thermoplastic polyurethane comprising OH-ended poly(dimethylsiloxane).

Why it is interesting: The invention relates to thermoplastic polyurethanes prepared from diisocyanate, polyether or polyester diol and a difunctional isocyanate-reactive polysiloxane. The materials are said to have improved “haptic”-, hydrophobicity- and tensile properties while retaining the processibility of TPU and are useful for ‘on-body’ applications like wristbands. In the examples both 4,4′-MDI and HDI are used together with chain extenders, polyTHF, BDO-HDO adipate and EO capped PDMS to prepare TPUs ranging from 55 to 95 Shore A.

EO-capped PDMS

Innovation in Polyurethanes

All posts by Gerhard Bleys

Single Pot NOPs

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Omniphobic Polyurea

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Thermoplastic PU-PDMS Copolymer

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