All posts tagged polyether polyol

TPU from Three Types of Polyol and TODI

Title: THERMOPLASTIC POLYURETHANE FOR SEAL APPLICATIONS

 Number/Link:WO2015/090916 (German)

Applicant/Assignee: Carl Freudenberg

Publication date: 25-06-2015

“Gist”: TPU based on blend of a polyester- polyether- and polycarbonate diols has exceptional properties

Why it is interesting: According to this application, TPUs prepared from blends of polyether, polyester and polycarbonate diols, result in materials with very high hydrolysis resistance, mechanical properties, high- ánd low temperature resistance and with excellent processing properties. In the examples 2000 MW polyether-, polycarbonate- and polycaprolactone diols are blended, reacted with toluidinediisocyanate (TODI) and subsequently extended with butanediol.  Surprisingly there appears to act some kind of synergy resulting in properties higher than would be expected from the individual polyol components.

3,3'-Dimethyl-4,4'-Biphenyldiisocyanate (TODI)

3,3′-Dimethyl-4,4′-Biphenyldiisocyanate (TODI)

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by Gerhard Bleys on June 26, 2015  •  Permalink
Posted in Polyols, Thermoplastics
Tagged , , , , , , ,

Posted by Gerhard Bleys on June 26, 2015

https://purpatents.com/2015/06/26/tpu-from-three-types-of-polyol-and-todi/

Polyols from Urethane Alcohols

Title: USE OF URETHANE ALCOHOLS FOR PREPARATION OF POLYETHER POLYOLS

 Number/Link: WO2015075057

Applicant/Assignee: Bayer

Publication date: 28-05-2015

“Gist”: Urethane alcohols prepared from cyclocarbonates are used as starters for polyether polyols

Why it is interesting: Urethane diols are prepared by reacting cyclic carbonates like ethylene- or propylene carbonate with an alkanolamine like e.g. ethanolamine. The alcohols are then further reacted with propylene oxide and/or ethylene oxide to make polyether polyols, useful for the production of flexible foams a.o.  No comparison of the properties of these polyols (or of the resulting foams), with ‘conventional’ polyether polyols, is given. The only advantage (at least for Bayer) being that the polyols are partly based on cyclocarbonates which are by-products of the polycarbonate polyol production.

A Urethane Alcohol

A Urethane Alcohol

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by Gerhard Bleys on May 29, 2015  •  Permalink
Posted in Flexible Foams, Polyols
Tagged , , , , , , ,

Posted by Gerhard Bleys on May 29, 2015

https://purpatents.com/2015/05/29/polyols-from-urethane-alcohols/

Polyester Polyol with PDMS Backbone

Title: POLYESTER POLYOL, POLYURETHANE OBTAINED USING THE SAME, PROCESS FOR PRODUCTION THEREOF, AND MOLDED POLYURETHANE

 Number/Link: US2014/0246621

Applicant/Assignee: Mitsubishi Chemical

Publication date: 4-09-2014 (priority PCT)

“Gist”: A polyester polyol is prepared from a caboxylic acid-modified PDMS and a polyether diol.

Why it is interesting: A polyester polyol is prepared form a linear polydimethylsiloxane end-capped with carboxylic acid groups and having a molecular weight between about 500 and 4000 together with a polytetramethyleneether glycol with MW of 500 to 2000, such that the PDMS content is about 40% . The use of this polyol in polyurethane elastomers results in modified surface characteristics like reduced tackiness. The invention mentions fibers and films as potential applications, but this could be an interesting polyol for many other applications as well. Interesting idea but probably not new.  Only one claim appears to have survived the filing process.

 

Representation of the polyester polyol according to the invention

Representation of the polyester polyol according to the invention

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by Gerhard Bleys on September 8, 2014  •  Permalink
Posted in Elastomers, Polyols
Tagged , , , , , , , , , ,

Posted by Gerhard Bleys on September 8, 2014

https://purpatents.com/2014/09/08/polyester-polyol-with-pdms-backbone/

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