All posts tagged NOP polyols

Polyurethane for Filament Winding

Patent Title: FILAMENT WINDING PROCESSES USING POLYURETHANE RESINS AND SYSTEMS FOR MAKING COMPOSITES

 Number/Link: W2016183073

Applicant/Assignee: Covestro

Publication date: 17-11-2016

“Gist”: Compositions comprising polymeric MDI, amine-initated polyethers and natural oil polyols are useful for filament winding

Why it is interesting: Filament winding is a process for the production of hollow composite structures whereby resin-impregnated fibers are wound on a mandrel and then cured. Typically the fibers are impregnated with polyesters or epoxies.  Polyurethane compositions are difficult to use in this process because of reactivity and moisture sensitivity. According to this invention an isocyanate reactive composition comprising at least 50% high functionality amine-initiated polyether polyols and up to 50% of a hydrophobic OH-functional vegetable oil, can be advantageously used for PU filament winding. In the examples blends of 3 and 4-functional amine-initated polyether polyols with mole weight of about 250, castor oil, or OH-functional soy-oil, are used together with a high 2,4′ polymeric MDI.

Filanent winding process

Filanent winding process

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by Gerhard Bleys on November 18, 2016  •  Permalink
Posted in composites, Polyols
Tagged , , , , , , , ,

Posted by Gerhard Bleys on November 18, 2016

https://purpatents.com/2016/11/18/polyurethane-for-filament-winding/

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
Tagged , , , , , , , ,

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
Tagged , , , , , , ,

Posted by Gerhard Bleys on July 11, 2016

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

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