Flexible Foams Containing PPE Polyols

Title: POLYURETHANE FOAM AND ASSOCIATED METHOD AND ARTICLE

 Number/Link: WO2015/041905

Applicant/Assignee: SABIC

Publication date: 26-03-2015

Gist”: Use of poly(phenylene ether) polyols in flexbile foams

Why it is interesting: As expected Sabic continue their series on the use of poly(phenylene ether) in polyurethane materials. This application is about the use of (some) PPE polyol in flexible foams. The resulting foams are said to have improved hardness, tear- and tensile strength. In the examples 10 to 40% of a PPE diol (on total polyol) is used together with other polyols, MDI or TDI and water as blowing agent, resulting in flexible foams with densities ranging from about 25 to 50 kg/m³. The PPE diol is a copolymer of 2,6-dimethylphenol and 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane with an equivalent weight of about 1000.

PPE diol used in the invention. Q5 and Q6 pare methyl.

PPE diol used in the invention. Q5 and Q6 are methyl groups.

Polyurea ‘Nano’-Particles to Improve Properties of Polyurethane Flexible Foams and Elastomers

Title: USE OF POLYUREA NANOPARTICLES AS PERFORMANCE MODIFIERS IN POLYURETHANE MATERIALS

 Number/Link: WO2014/012769

Applicant/Assignee: Huntsman

Publication date: 23-01-2014

Gist”: A dispersion of polyurea particles prepared from 4,4′ MDI, diamine chain extender and a high mole weight monoamine is used to improve mechanical properties of flex foam.

Why it is interesting: Dispersions of polyurea particles with an average diameter of a few hundred nanometer and a Tg>150°C (pref.) can be produced by first reacting a relatively high MW polyether monoamine and a di-isocyanate (optionally dispersed in e.g. polyol) and subsequently adding a diamine chain extender. The dispersion is then used in a flexible foam or elastomer formulation, such that the amount of particles in the material is about 1-5% (w/w). In an example a 2000MW EO/PO monoamine was used together with 4,4′-MDI and a diamine chain extender to produce a particle dispersion in polyol, which was then used in polyurethane formulations. The particles do seem to have a positive effect on mechanical properties, however, the results for flex foam are clouded because of a sharp increase in material density compared to the reference. This density increase may well be due to a cellopening effect as described in WO2007/104623  in which a similar particle dispersion is used.

Polyethermonoamine as used in the invention.

Polyethermonoamine as used in the invention.

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