PPE-Filled Rigid Foams

Title: RIGID FOAM AND ASSOCIATED ARTICLE AND METHOD

 Number/Link: WO2015/012989

Applicant/Assignee: SABIC

Publication date: 29-01-2015

Gist”: Rigid polyurethane foams containing polyphenylene ether particles

Why it is interesting: This invention is about rigid PU or PIR (polyisocyanurate) foams containing up to 25% w/w on the total composition of poly(2,6-dimethyl-1,4-phenylenether) particles.  The particles have a mean particle size of about 6 µm and are prepared by jet milling a commercial grade of PPE powder. The resulting foams are said to have reduced flammability and water absorption.  This is the second patent application that SABIC files on PPE-PU hybrids or combinations.  An interesting development but it is hard to believe that these ideas are practical and economical.

poly(2,6-dimethyl-1,4-phenyleneether)

poly(2,6-dimethyl-1,4-phenylene ether)

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TPU from PPE Diols

Title: THERMOPLASTIC POLYURETHANE AND ASSOCIATED METHOD AND ARTICLE

 Number/Link: WO2014/209934

Applicant/Assignee: Sabic

Publication date: 31-12-2014

Gist”: Thermoplastic Polyurethanes based on polyphenylene ether diols

Why it is interesting: This invention relates to thermoplastic polyurethanes prepared from hydroxyl ended polyphenylene ethers (PPE) and diisocyanates.  Optionally the PPE diols can be blended with ‘conventional’ polyether or polyester diols and chain extenders.  The resulting TPUs are reported to have increased chemical resistance and hydrophobicity. In the examples copolymers of 2,6-dimethylphenol and 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane with molecular weight between about 1000 and 3000 are reacted (in solvent)with MDI or TDI using DBTDL as a catalyst. The resulting thermoplastic materials had a Tg of about 160 to 170°C.  While these could be interesting engineering thermoplastics, I guess they would be difficult to produce and difficult to process.

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

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

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