All posts tagged Fire & Smoke

Brominated Polyurethane Oligomers

Title: FLAME-RETARDING OLIGOMERIC BROMINATED URETHANE COMPOSITIONS

 Number/Link: US2013/0217286

Applicant/Assignee: Lubrizol

Publication date: 22-08-2013 (priority PCT)

“Gist”: Use of highly brominated isocyanate-reactive monomers to prepare brominated PU oligmers useful as non-leaching fire retardants.

Why it is interesting: Brominated fire retardants are highly effective in polyurethanes but their use is being phased-out because of environmental issues and the production of some of them will be discontinued in the near future. Brominated PU oligomers can be used as fire retardants with less environmental problems as they are not fugitive and will leach less.  The oligomers can be produced using monofunctional highly brominated isocyanate-reactive monomers like tribromoneopentanol or pentabromophenol. Difunctional brominated monomers can also be using together with monofunctional isocyanates to control the molecular weight which is preferably between 800 and 20,000 (claimed).  The oligomers can be used as fire retardants in PU dispersions (claimed) and in other polyurethane compositions e.g. in TPUs.

pentabromophenol

pentabromophenol

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by Gerhard Bleys on August 28, 2013  •  Permalink
Posted in Adhesives-Coatings, Thermoplastics
Tagged , , , ,

Posted by Gerhard Bleys on August 28, 2013

https://purpatents.com/2013/08/28/brominated-polyurethane-oligomers/

Polymer Polyols with Phosphorous-Containing Particles

Title: PHOSPHOROUS BASED POLYADDITION/POLYURETHANE-UREA POLYOLS

 Patent Number & Link: WO2013101524

Applicant/Assignee: Dow

Publication date: 4-07-2013

“Gist”: PHD and PIPA polyols are produced in the presence of phosphorous containing polyols

Why it is interesting: PDH or PIPA polymer polyols can be prepared by dissolving a low MW amine- or  hydroxyl containing co-reactant in a ‘base polyol’ and subsequently reacting with an isocyanate. When executed properly and with the correct ingredients this results in a stable dispersion of respectively urea or urethane particles in the base polyol. (see also previous posts in this blog). This invention states that by using phosphorous flame retardants containing amine or hydroxyl groups in addition to the co-reactant, PIPA or PHD (or hybrid) polymer polyols can be prepared with flame the retardant incorporated in the particles, resulting in a flame retardant polymer polyol.

Phosphorous polyol as used in the invention

Phosphorous polyol as used in the invention

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by Gerhard Bleys on July 9, 2013  •  Permalink
Posted in Polyols
Tagged , , , , , ,

Posted by Gerhard Bleys on July 9, 2013

https://purpatents.com/2013/07/09/polymer-polyols-with-phosphorous-containing-particles/

Hybrid Polymer Polyols

Title: HYBRID PHD/PMPO POLYOLS FOR POLYURETHANE FOAM APPLICATIONS

 Number/Link: WO2013090325 (=US20130158142)

Applicant/Assignee: Bayer

Publication date: 20-06-2013

“Gist”: A hybrid SAN-PHD filled polyol allows for higher solids content and lower viscosity.

Why it is interesting: “Filled polyols” (i.e. polyols containing dispersed particles) are well known in polyurethane technology and are available in three types depending on the type of particles dispersed. “PIPA” polyols contain polyurethane particles, “PHD” polyols contain polyurea (“polyharnstoff”) particles and “polymer polyols” contain SAN (styrene-acrylonitrile) particles. The polyol in which the particles are dispersed is called the ‘base polyol’. The current invention teaches the preparation of a hybrid filled polyol by using PIPA or PHD polyol as (optionally part of) the base polyol to produce a SAN polymer polyol. The hybrid polymer polyol reportedly has has a lower viscosity at higher solids content and foams produced with it are claimed to have improved fire and VOC properties.

SAN

SAN

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by Gerhard Bleys on June 25, 2013  •  Permalink
Posted in Flexible Foams, Polyols
Tagged , , , , ,

Posted by Gerhard Bleys on June 25, 2013

https://purpatents.com/2013/06/25/hybrid-polymer-polyols/

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