All posts tagged polyester polyol

PET-Lignin Polyols

Patent Title: HIGH RECYCLE CONTENT POLYOLS FROM THERMOPLASTIC POLYESTERS AND LIGNIN OR TANNIN

 Number/Link: WO2016/118411

Applicant/Assignee: Resinate Materials Group

Publication date: 28-07-2016

“Gist”: PET is glycolized and then reacted with lignin or tannin

Why it is interesting: This application is about ‘sustainable’ aromatic polyester polyols partly based on recycled materials and partly on biorenewable materials. According to the invention the polyols can be prepared by first glycolizing (waste) PET and subsequently reacting the mixture with lignin at 110-210°C while removing volatile condensation products.  The resulting polyols (pref) show a OH value between 40 and 400 mg KOH/g, a fn of 2-2.2 and a viscosity at 25°C of 500 to 3000 cP. In the examples polyols with up to 25 wt% lignin are shown. The polyols are said to be useful e.g. in 2K PU coating compositions.

Part of a lignin structure

Part of a lignin structure

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by Gerhard Bleys on July 29, 2016  •  Permalink
Posted in Adhesives-Coatings, Polyols, Recycling
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Posted by Gerhard Bleys on July 29, 2016

https://purpatents.com/2016/07/29/pet-lignin-polyols/

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.

Triglicerid with PUFA

Trigliceride with PUFA

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by Gerhard Bleys on July 11, 2016  •  Permalink
Posted in Flexible Foams, Polyols
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Posted by Gerhard Bleys on July 11, 2016

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

Hydrophilic PU Foams from Sulfonated Polyols

Patent Title: HYDROPHILIC OPEN CELL FOAMS

 Number/Link: WO2016/044512

Applicant/Assignee: 3M

Publication date: 24-03-2016

“Gist”: Use of sulfonated polyols to make hydrophilic foams

Why it is interesting: Hydrophilic polyurethane foams are well known and often made using polyols with a high ethyleneoxide content.  According to this invention, open celled, hydrophilic foams can be made using a polyol blend containing polyols (or polyamines) having charged functional groups. In the examples a polymeric MDI is reacted with a polyol blend of a 3000MW, 8% EO, triol with up to 40% (w/w) of a sulfonated diol. The sulfonated diol is prepared by reacting 0.25 moles of  dimethyl sodium 5-sulfoisophthalate with 1 mole of PEG 600. The foams have properties useful for use as household sponges.

Dimethyl sodium 5-sulfoisophthalate

Dimethyl sodium 5-sulfoisophthalate

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by Gerhard Bleys on April 1, 2016  •  Permalink
Posted in Flexible Foams, Polyols
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Posted by Gerhard Bleys on April 1, 2016

https://purpatents.com/2016/04/01/hydrophilic-pu-foams-from-sulfonated-polyols/

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