Classic PU Patent of the Month: “Hypersoft” Flexible Foams (1971)

Title: PROCESS FOR OBTAINING POLYURETHANE FOAMS

 Number/Link: GB1381925

Applicant/Assignee: PECHINEY UGINE KUHLMANN

Publication date: 29-01-1975   (priority FR – 1971)

Gist”: Very soft hydrophilic flexible foam is made from TDI and a combination of a high EO polyol and a ‘conventional’ (hot cure) polyol.

Why it is interesting: Very soft – so called “hypersoft” – foams were prepared form TDI 80/20 and  a mixture of polyols consisting of a random 75% EO -25% PO triol and a block 90% PO – 10% EO triol in a ratio of 85:15. (about).  The foams were all-water blown and had densities of below 30 kg/m³, which was exceptional for the time.

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4 Comments

  1. John Duffy

     /  December 31, 2013

    Hi 

    I love the “classic” category. It shows great respect for the technology and its evolution. 

    Happy 2014 John Duffy Easterly Research Warminster, PA    USA

    Reply
    • Hi John,

      Thank you for your comment. I will try to do at least one “classic” per month from now on.
      Have a nice year-end!
      Geert

      Reply
  2. Denis Hicks

     /  December 31, 2013

    Then dont be modest and I hope you include a few of your own:-). Happy new year!

    Reply

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