All posts tagged Insulation

Composite Polyurethane-Polystyrene Thermal Insulation Foams

Title:  METHOD FOR PRODUCTION OF HEAT INSULATING COMPOSITE MATERIALS AND HEAT INSULATING COMPOSITEMATERIAL PRODUCED THEREBY

 Number/Link: WO2013/021324

Applicant/Assignee: HIT KONSULTING

Publication date: 14-02-2013

“Gist”: Expandable polystyrene beads are added to rigid PUR or PIR foam system.

Why it is interesting: EPS beads with a softening temperature of 80-90°C are added to the isocyanate stream in an amount of 15-60% w/w to the total system. The exotherm has to be exactly right to fully expand and not degrade the EPS, and is controlled by the ratio PU/EPS.  This idea is not new, but it remains an interesting route to cheap insulation. The claim is relatively narrow so could get granted imo.

Expandable Polystyrene (Wikimedia)

Expandable Polystyrene (Wikimedia)

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by Gerhard Bleys on February 19, 2013  •  Permalink
Posted in composites, Rigid Foams
Tagged ,

Posted by Gerhard Bleys on February 19, 2013

https://purpatents.com/2013/02/19/composite-polyurethane-polystyrene-thermal-insulation-foams/

Polyurethane Foams from Sugar

Title: Sugar-Based Polyurethanes, Methods for Their Preparation, and Methods of Use Thereof

 Number/Link: US2013030067

Applicant/Assignee: Imperial Sugar Co.

Publication date: 31-01-2013

“Gist”: Very low density semi-rigid foams are produced from sucrose syrup and MDI.

Why it is interesting: Open celled foams are prepared from sucrose, water, MDI and preferably a  flame retardant at an NCO index from 20-60 (preferred). A number of examples is given of foams with densities 0f 8 kg/m3 (0.5 pcf) which is quite low.  Mechanical an heat insulation properties are probably not very good but the foams are very ‘green’ and cheap. Useful as sprayable acoustic foams?

Sucrose

Sucrose

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by Gerhard Bleys on February 5, 2013  •  Permalink
Posted in Rigid Foams
Tagged , , , ,

Posted by Gerhard Bleys on February 5, 2013

https://purpatents.com/2013/02/05/polyurethane-foams-from-sugar/

Insulating Elastomer-Aerogel Composites

Title: INSULATING MATERIAL COMPRISING AN ELASTOMER IMPREGNATED WITH AEROGEL-BASE

 Number/Link:  US2013022769

Applicant/Assignee: UNIV MEMPHIS

Publication date: 24-01-2013

“Gist”: Elastomeric material containing aerogel ‘bodies’, useful for heat insulation.

Why it is interesting:  The elastomeric matrix material can be any kind of thermoset or thermoplastic rubber, including polyurethanes but RTV silicones are preferred. The aerogels can be organic, inorganic or hybrid, but are preferably polyurea-crosslinked silicas of any geometrical shape,  preferably 1-5mm in size with an aerogel:polymer ratio of 15:100 to 200:100 (w/w). Both insulation and mechanical properties compare favourably to ASPEN aerogel blankets. Useful for insulation of cryogenic fuel tanks a.o.

Space shuttle with PU insulated cryogenic fuel tank.

Space shuttle with PU insulated cryogenic fuel tank. (Wikimedia)

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by Gerhard Bleys on February 1, 2013  •  Permalink
Posted in composites, Elastomers
Tagged , , ,

Posted by Gerhard Bleys on February 1, 2013

https://purpatents.com/2013/02/01/insulating-elastomer-aerogel-composites/

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