All posts tagged Environment

Improved “Black” Insulation Foams

Title: ISOCYANATE-BASED POLYMER FOAM COMPOSITE WITH IMPROVED THERMAL INSULATION PROPERTIES

 Number/Link: US20140151593

Applicant/Assignee: Dow

Publication date: 5-06-2014 (Priority PCT/US)

“Gist”: Use of fluorinated carbon black to improve insulation value of rigid polyurethane foams

Why it is interesting: It is known that carbon black can be used to improve the insulation value of rigid foams by reducing the radiation component of the thermal conductivity. The carbon black however needs to have a very small particle size and needs to be extremely well dispersed into the reacting medium. According to the invention using a fluorinated carbon black improves the dispersion into the raw materials which, in turn, improves the final insulation value of the foam.
A small but valuable innovation.

Different grades of carbon black

Different grades of carbon black

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by Gerhard Bleys on June 18, 2014  •  Permalink
Posted in dispersions, Rigid Foams
Tagged , , , , , , , , ,

Posted by Gerhard Bleys on June 18, 2014

https://purpatents.com/2014/06/18/improved-black-insulation-foams/

Flexible Foams Containing Plant Seeds

Title: SOFT POLYURETHANE FOAMS CONTAINING PLANT SEEDS

 Number/Link: WO2014/076077

Applicant/Assignee: BASF

Publication date: 22-05-2014

“Gist”: Plants seeds can be added to flexible foam formulations and will still germinate if the temperature during foaming does not exceed 80°C

Why it is interesting:  In this invention flexible foams containing superabsorbent polymers, fertilizers , (preferably) a (biodegradable) fiber reinforcement and plant seeds is described.  It was found that the temperature of the foaming mixture must not exceed 80°C for the seeds to survive. The temperature can be controlled by prepolymerization, sec. OH content of the polyol and thickness of the foamed part or slab.  The flexible foam sheets can be used for green walls, roofs and the like.
Foaming plant seeds in flexible foam has been done before using ‘Hypol(TM)’ technology. The temperature is then kept low by using a ‘full’ prepolymer and a large surplus of water.   See my blogpost on Hypol and US3812619.

Example of a 'green wall'

Example of a ‘green wall’

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by Gerhard Bleys on May 27, 2014  •  Permalink
Posted in Flexible Foams
Tagged , , ,

Posted by Gerhard Bleys on May 27, 2014

https://purpatents.com/2014/05/27/flexible-foams-containing-plant-seeds/

Flexible- and Viscoelastic Foams from CO2-Based Polyols

Title: HIGH STRENGTH POLYURETHANE FOAM COMPOSITIONS AND METHODS

 Number/Link: WO2014/074706

Applicant/Assignee: Novomer

Publication date: 15-05-2014

“Gist”: The mechanical properties of flexible foams can be improved by replacing up to 50% of the polyol with CO2-based polycarbonate polyols.

Why it is interesting: Novomer (http://www.novomer.com) is a ‘sustainable chemistry company’ which produces aliphatic polycarbonate polyols from CO2 and epoxides. In this 215 page patent application they claim that hardness and mechanical properties viz. tensile- and tear strength of flexible and VE foams are improved by replacing between 2 and 50% of the polyol by their polycarbonate polyol. Other properties are supposedly not affected much, although resilience (e.g.) clearly drops for HR foams.
While the first claim may be technically new, it is – in my opinion- not patentable because not surprising to “a person skilled in the art”.

Reaction of CO2 and PO showing various 'head-to-tail' orientations

Reaction of CO2 and PO showing various ‘head-to-tail’ orientations

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by Gerhard Bleys on May 21, 2014  •  Permalink
Posted in Flexible Foams, Polyols
Tagged , , , , , , , ,

Posted by Gerhard Bleys on May 21, 2014

https://purpatents.com/2014/05/21/flexible-and-viscoelastic-foams-from-co2-based-polyols/

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