All posts in category Thermoplastics

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/

Hydrophobic Thermoplastic Polyurethanes

Title: POLYURETHANE

 Number/Link: US2015/0119535

Applicant/Assignee: Nippon Soda

Publication date: 30-04-2015 (priority PCT/JP)

“Gist”: TPU based on a ‘hybrid’ polybutadiene-polyester polyol and an asymmetric isocyanate

Why it is interesting: According to this invention, TPUs with excellent water-resistance can be prepared from a polyol which is made by reacting a polybutadiene diol with a mole weight of a few 1000 with a cyclic ester monomer, up to a mole weight of about 5000 to 15000 (preferred).  The resulting ‘hybdrid’  (polyester-polybutadiene-polyester) polyol is then prepolymerized with a surplus of an assymetric di-isocyanate. Finally the prepolymer is reacted with a chain extender to make the TPU. In the examples polybutadiene diols are reacted with ε-caprolactone and then with IPDI or 2,4-TDI.  The chain extender used is 1,4-butanediol. Interesting materials and (but) relatively soft as would be expected.

Caprolactone

Caprolactone

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by Gerhard Bleys on May 1, 2015  •  Permalink
Posted in Thermoplastics
Tagged , , , , , , , , ,

Posted by Gerhard Bleys on May 1, 2015

https://purpatents.com/2015/05/01/hydrophobic-thermoplastic-polyurethanes/

Particle-Reinforced Thermoplastic Polyurethane

Title: COMPOSITION AND ARTICLE COMPRISING THERMOPLASTIC POLYURETHANE AND PARTICULATE ENGINEERING POLYMER

 Number/Link: WO2015/031292

Applicant/Assignee: SABIC

Publication date: 5-03-2015

“Gist”: TPU is reinforced with ultrafine particles made from engineering thermoplastics having a melting point of over 200°C.

Why it is interesting: Particulate polyarylsulfone, polyimide, poly(phenylene sulfide) or polyamide, with a melting point or glass transition higher than 200°C and average particle size between 5 and 200 μm, is melt-blended with TPU at a temperature below 200°C and in an amount of 10-30% (w/w).  Alternatively the particles could be mixed (“slurried”) with the polyol and/or isocyanate used to produce the TPU.  The resulting composite is said to have increased hardness, tensile strength and heat resistance.
Sabic is becoming quite active in polyurethane innovation and is apparently looking for synergies with its engineering thermoplastics business.

Poly (1,4-phenylene sulfide) (PPS)

Poly (1,4-phenylene sulfide) (PPS)

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by Gerhard Bleys on March 6, 2015  •  Permalink
Posted in composites, dispersions, Thermoplastics
Tagged , , , , , , , , ,

Posted by Gerhard Bleys on March 6, 2015

https://purpatents.com/2015/03/06/particle-reinforced-thermoplastic-polyurethane/

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