All posts tagged hybrid

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/

Hybrid PU-PF Rigid Foams

Title: RIGID POLYURETHANE FOAM

 Number/Link: EP2591034A1

Applicant/Assignee: BASF

Publication date: 15-05-2013  (priority PCT/EP)

“Gist”: Use of novolac polyols in rigid (spray) foams to improve reactivity and flammability properties.

Why it is interesting: ‘Novolacs’ are phenol-formaldehyde (PF) resins which are produced at a p:f ratio of  >1 (as opposed to ‘resols’ where this ratio is <1) Novolacs are therefore phenol (OH) ended and can be used together with isocyanates to prepare hybrid polyurethanes. In this case novolacs with a functionality of about 4-8 are used together with conventional rigid foam polyol(s) in which the novolacs are dissolved (after heating and opt. melting) in an amount of about 40%. Together with polymeric MDI, water and conventional additives rigid (spray) foams are produced with improved flammibility, smoke, scorching and reactivity properties.

Novolac resin

Novolac resin

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by Gerhard Bleys on May 22, 2013  •  Permalink
Posted in Rigid Foams
Tagged , , , ,

Posted by Gerhard Bleys on May 22, 2013

https://purpatents.com/2013/05/22/hybrid-pu-pf-rigid-foams/

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