All posts tagged TPE

TPU with Anti-Biofouling Surface

Patent Title: ANTIFOULING COMPOSITION

 Number/Link: WO2017/007899

Applicant/Assignee: BASF

Publication date: 12-jan-2017

“Gist”: TPU containing silicone diol and having microstructured surface

Why it is interesting: Biofouling of surfaces e.g. in the marine environment or of medical implants is a problem.  For example the growth of barnacles on the hulls of vessels, subsea cables, pipes and energy generating structures has a significant economic impact. According to this invention, thermoplastic polyurethane articles with a surface energy of about 20 mN/m and a microstructered surface topography show an improved resistance to biofouling. The TPU is produced by incorporating 5-15% on the total composition of a PDMS diol with a OH value of 15 to 150, and by pressing onto the surface a 3D topology with ‘peaks’ and ‘valleys’ of an order of magnitude of 10μm.

Microstructured surface according to the invention

Microstructured surface according to the invention

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by Gerhard Bleys on January 13, 2017  •  Video  •  Permalink
Posted in Adhesives-Coatings, Polyols, Thermoplastics
Tagged , , , , , , , , ,

Posted by Gerhard Bleys on January 13, 2017

https://purpatents.com/2017/01/13/tpu-with-anti-biofouling-surface/

Soft Ionomeric TPU

Patent Title: SOFTENING THERMOPLASTIC POLYURETHANES USING IONOMER TECHNOLOGY

 Number/Link: US20160347900

Applicant/Assignee: Univ. Akron; Covestro

Publication date: 1-Dec-2016

“Gist”: TPU is prepared with ionomeric groups having bulky counter-ions

Why it is interesting: According to this invention a novel type of plasticized thermoplastic polyurethane can be made  by incorporating as chain extender a diol containing an ionic group with a bulky counter ion. It is said that the steric hindrance of the bulky counter ions creates additional free volume that softens the polymer and lowers the melt viscosity. In the examples N,N-bis(2-hydroxyethyl)-2-aminoethane sulfonic acid (BES) is used together with bulky alkylammonium cations. The softest TPU shown has a 37 Shore A hardness at 25% hardblock content and 7.6 mole% BES-tetrakis(decyl)ammonium. This accounts for a 35 point hardness decrease compared to an ionomer-free control sample.

N,N-bis(2-hydroxyethyl)-2-aminoethane sulfonic acid

N,N-bis(2-hydroxyethyl)-2-aminoethane sulfonic acid

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by Gerhard Bleys on December 5, 2016  •  Permalink
Posted in Thermoplastics
Tagged , , , , , , , , ,

Posted by Gerhard Bleys on December 5, 2016

https://purpatents.com/2016/12/05/soft-ionomeric-tpu/

Dianhydrohexitol-Based TPU

Patent Title: METHOD FOR PREPARING THERMOPLASTIC POLYURETHANE PELLET

 Number/Link:  WO2016/055731  (French)

Applicant/Assignee: Roquette Freres

Publication date: 14-04-2016

“Gist”: Use of isosorbide as chain extender for TPU preparation

Why it is interesting: According to this invention the use of dianhydrohexitols as chain extender results in thermoplastic polyurethanes with improved overmoulding properties, notably improved colour, abrasion resistance and soft touch. In the examples TPUs prepared from 4,4’MDI, PTMEG 1000 and chain extended with isosorbide are compared to 1,4-butanediol extended TPUs. The isosorbide TPUs are softer with better abrasion resistance and -in my opinion surprisingly- have a somewhat brighter colour.

Isosorbide

Isosorbide

 

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by Gerhard Bleys on April 18, 2016  •  Permalink
Posted in Thermoplastics
Tagged , , , , , , , , ,

Posted by Gerhard Bleys on April 18, 2016

https://purpatents.com/2016/04/18/dianhydrohexitol-based-tpu/

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