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<p>[QUOTE="Wanttoknow, post: 149309, member: 1987"]<font size="5"><b>History</b></font></p><p>*<a href="https://en.wikipedia.org/wiki/Otto_Bayer" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Otto_Bayer" rel="nofollow">Otto Bayer</a> and his coworkers at <a href="https://en.wikipedia.org/wiki/IG_Farben" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/IG_Farben" rel="nofollow">IG Farben</a> in Leverkusen, Germany, first made polyurethanes in 1937. Early work focused on the production of fibres and flexible foams and PUs were applied on a limited scale as aircraft coating during <a href="https://en.wikipedia.org/wiki/World_War_II" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/World_War_II" rel="nofollow">World War II</a>. Polyisocyanates became commercially available in 1952, and production of flexible polyurethane foam began in 1954 using <a href="https://en.wikipedia.org/wiki/Toluene_diisocyanate" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Toluene_diisocyanate" rel="nofollow">toluene diisocyanate</a> (TDI) and polyester polyols. These materials were also used to produce rigid foams, gum rubber, and <a href="https://en.wikipedia.org/wiki/Elastomer" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Elastomer" rel="nofollow">elastomers</a>. Linear fibers were produced from <a href="https://en.wikipedia.org/wiki/Hexamethylene_diisocyanate" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/Hexamethylene_diisocyanate" rel="nofollow">hexamethylene diisocyanate</a>(HDI) and <a href="https://en.wikipedia.org/wiki/1,4-butanediol" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://en.wikipedia.org/wiki/1,4-butanediol" rel="nofollow">1,4-butanediol</a> (BDO).[/QUOTE]</p><p><br /></p>
[QUOTE="Wanttoknow, post: 149309, member: 1987"][SIZE=5][B]History[/B][/SIZE] *[URL='https://en.wikipedia.org/wiki/Otto_Bayer']Otto Bayer[/URL] and his coworkers at [URL='https://en.wikipedia.org/wiki/IG_Farben']IG Farben[/URL] in Leverkusen, Germany, first made polyurethanes in 1937. Early work focused on the production of fibres and flexible foams and PUs were applied on a limited scale as aircraft coating during [URL='https://en.wikipedia.org/wiki/World_War_II']World War II[/URL]. Polyisocyanates became commercially available in 1952, and production of flexible polyurethane foam began in 1954 using [URL='https://en.wikipedia.org/wiki/Toluene_diisocyanate']toluene diisocyanate[/URL] (TDI) and polyester polyols. These materials were also used to produce rigid foams, gum rubber, and [URL='https://en.wikipedia.org/wiki/Elastomer']elastomers[/URL]. Linear fibers were produced from [URL='https://en.wikipedia.org/wiki/Hexamethylene_diisocyanate']hexamethylene diisocyanate[/URL](HDI) and [URL='https://en.wikipedia.org/wiki/1,4-butanediol']1,4-butanediol[/URL] (BDO).[/QUOTE]
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