All posts in category Polyols

Polyurethanes from Mevalonolactone

Patent Title: POLYMERS PREPARED FROM MEVALONOLACTONE AND DERIVATIVES

 Number/Link: US2016/0130389

Applicant/Assignee: Visolis

Publication date: 12-05-2016

“Gist”: Use of mevalonolactone derivatives as monomers for PU and other polymers

Why it is interesting: 3,5-Dihydroxy-3-methylvaleric acid and its corresponding lactone “mevalonolactone”, is a common metabolic intermediate and can be produced industrially by fermentation of biomass. Mevalonolactone can be converted to diacids, (unsaturated) diols, triols etc., which could be useful as a renewable and inexpensive feedstock for polymers like polyester, polyamides and polyurethanes. In an example mevalonolactone is reacted with ethanolamine resulting in the triol  3,5-dihydroxy-N-(2-hydroxyethyl)-3-methylpentanamide which is in turn reacted with 4,4′ MDI to make a model polyurethane.

Dihydroxymethylvaleric acid and its corresponding lactone

Dihydroxymethylvaleric acid and its corresponding lactone

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by Gerhard Bleys on May 16, 2016  •  Permalink
Posted in Polyols
Tagged , , , , ,

Posted by Gerhard Bleys on May 16, 2016

https://purpatents.com/2016/05/16/polyurethanes-from-mevalonolactone/

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/

Vinyl-Functional UV-Curable Polyurethanes

Patent Title: ALKENYL ETHER POLYOLS

 Number/Link: WO2016038112 (German)

Applicant/Assignee: Henkel

Publication date: 17-03-2016

“Gist”: Alkenylether-functional polyols are used in oligomeric PU adhesives.

Why it is interesting: Alkenylether-functional groups are highly reactive and can be cured by UV-initiated cationic polymerization. This has the advantage of being unsensitive to oxigen which allows for so-called “dark cure”, i.e. the continuing polymerization after a first pulse of UV light. According to this invention, vinyl functional polyols are prepared by polymerizing a hydroxyl- or amine functional vinyl ether, e.g. 4-hydroxybutylvinylether (HBVE) or 3-aminopropylvinylether with epoxides or cyclocarbonates. The polyols can then be reacted with isocyanates resulting in UV curable polyurethanes.  In an example HBVE is reacted with 1,4-butanedioldiglycidylether to make the vinyl-functional polyol which is then further reacted with isophorondiisocyanate to make the PU adhesive.

1,4-butandioldiglycidylether

1,4-butandioldiglycidylether

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by Gerhard Bleys on March 21, 2016  •  Permalink
Posted in Adhesives-Coatings, Polyols
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Posted by Gerhard Bleys on March 21, 2016

https://purpatents.com/2016/03/21/vinyl-functional-uv-curable-polyurethanes/

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