Tack-Free Polythiourethane Gels

Patent Title: SOFT ISOCYANATE-CROSSLINKED POLYMER SUBSTANCE AND ASSOCIATED PRODUCTS

 Number/Link: WO2017/054797 (German)

Applicant/Assignee: Technogel

Publication date: 6-april-2017

Gist”: Tack-free polyurethane gels are made from polythiols

Why it is interesting: Very soft polyurethane elastomers or “gels” can be made using high functionality isocyanate and monols (as co-invented by myself – e.g. EP1389222 ) or by reacting a high functionality polyol/siocyanate system at low isocyanate-index (as invented by Bayer – later spun off as Technogel).  PU gels are useful as shock dampers, gaskets and cushions but are always tacky and need to be covered or wrapped, which changes their damping and hardness characteristics. According to this invention tack-free gels without the need for covering can be produced by using polythiols instead of polyols, resulting in poly(thiolurethanes) instead of polyurethanes. This is interesting and surprising and I wonder if it would work with the monol-gels as well.

thiolurethane

Thiolurethane linkage

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4 Comments

  1. Robert

     /  June 28, 2018

    HI,

    I would greatly appreciate if you can advise on my questions below:

    i am thinking of purchasing technogel’s viva mattress and was wondering if the gel they use is any different then the other soft solid gel used by other companies such as Akton etc..??

    In addition, as you write above, Technogel has come out with a patent for a new gel- how long do you think it’ll take them to use it in their products such as mattress? (might be worth waiting then) and also how different is the feel ?

    thank you!

    Reply
    • Robert

       /  June 28, 2018

      just wanted to clarify on my previous comment:

      by asking if there is a difference i mean is there any significant difference in the actual feel of the gel when laying on it or is it more of a minor technical difference that doesn’t effect the feel as much?

      thank you.
      p.s. i was just doing some research online and came across this site.

      Reply
      • Hi Robert,
        I’m affraid that the patent literature is not the best way to get the product information you need. It is not because some company has a patent that they actually use it in their products. The only thing you can be reasonably sure about is that their competitors do NOT use what is claimed in the patent.. unless they have a license (or don’t care about the law).
        Best way is to go and feel the stuff yourself.
        Have fun.
        Geert

  1. PCM Containing PU Gels | Innovation in Polyurethanes

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