All posts in category composites

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/

Steam-Treated Polyisocyanurate: Take Two

Title: PROCESS FOR MAKING URETHANE-ISOCYANURATES

 Number/Link:WO2015/006391

Applicant/Assignee: Dow

Publication date: 15-01-2015

“Gist”: Treating PUR-PIR with hot water at superatmospheric pressure results in a Tg increase.

Why it is interesting: This is exactly the same invention as discussed a while ago on this blog: WO2014/160616 . But, apart from the title, the application has been completely re-written by another agent and filed less then 4 months  after the first one. The only difference in the claims appears to be that the temperature and index ranges are taken a bit wider and that filled polyols and polyester polyols are claimed separately.  Very strange.  Is it possible that they forgot they already filed this?

Isocyanurate group

Isocyanurate group

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by Gerhard Bleys on January 16, 2015  •  Permalink
Posted in Adhesives-Coatings, composites
Tagged , , , , , , , ,

Posted by Gerhard Bleys on January 16, 2015

https://purpatents.com/2015/01/16/steam-treated-polyisocyanurate-take-two/

Polyurethane-NCC Composites

Title: POLYURETHANE COMPOSITES COMPRISING NANOCRYSTALLINE CELLULOSE AND METHOD FOR IMPROVING PROPERTIES OF POLYURETHANES THEREOF

 Number/Link: WO2014/190428

Applicant/Assignee: Celluforce

Publication date: 4-12-2014

“Gist”: A small amount of nanocrystalline cellulose improves mechanical properties of polyurethanes

Why it is interesting: Nanocrystalline cellulose or NCC is cellulose in the form of nano-scale crystals or fibrils produced from woodpulp. A few years ago NCC was hailed as a disruptive new “wonder material” with the potential to replace metal and make existing plastics obsolete. The current patent application claims the use of NCC in polyurethanes, added in amounts of (preferably) less than 1% to either the polyol or isocyanate stream. Both tensile and elongation values of the PU are said to improve.  While this may well be true and NCC is no doubt an interesting material this case is most probably not patentable.  Too little, too late.

Nanocrystalline cellulose "whiskers"

Nanocrystalline cellulose “whiskers”

 

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by Gerhard Bleys on December 8, 2014  •  Permalink
Posted in composites, dispersions
Tagged , , , , , ,

Posted by Gerhard Bleys on December 8, 2014

https://purpatents.com/2014/12/08/polyurethane-ncc-composites/

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