“Innovation in Polyurethanes – 2019 edition” is a 114-pages long in-depth review of the main polyurethane patent literature published during 2018, covering many hundreds of patent applications, clustered and discussed to reveal the major industrial research trends, main player activities and technologies. With many examples, direct download links to full-text pdf documents, 55 figures and graphs and 29 tables.

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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

Emissions of volatile organic compounds (VOC) from polyurethane systems and materials can contribute to safety, health and environmental issues and are subject to ever more stringent laws and regulations.

This report reviews the different strategies and technologies to reduce or eliminate emissions from polyurethane systems as disclosed in the recent patent literature.
The following groups of compounds are discussed:

• Monomeric isocyanates
• Aldehydes
• Amines
• Silicones
• Antioxidants
• Flame retardants
• Cyclic oligomers
• “Odours”

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