Comments on: Chilled, not Frozen Polyurethane Resin http://www.tabletop-terrain.com/archives/2007/01/15/730/chilled-not-frozen-polyurethane-resin/ War Gaming and Modeling for Pulp, Warhammer, Mordheim and Flames of War Sat, 10 Dec 2011 18:43:13 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Stu http://www.tabletop-terrain.com/archives/2007/01/15/730/chilled-not-frozen-polyurethane-resin/comment-page-1/#comment-5088 Stu Sun, 14 Jan 2007 22:29:56 +0000 http://www.tabletop-terrain.com/archives/2007/01/15/730/#comment-5088 Normal setting is an exothermic catalysed chemical reaction. Chilling the two parts simply seems to slow the onset of that reaction so freezing mixed resin wouldn't gain you anything I don't think. People do freeze mixed epoxy putties because it does extend their working time. But with 'green stuff' and the like you're talking a couple of hours of working time instead of a couple of minutes. So the reaction involved is a lot slower. Exposure to air moisture (ie. when you open the bottles) degrades the resin parts involved (I don't know the chemistry involved), reducing working times and eventually making the resin useless. Although that can take years in my experience. Normal setting is an exothermic catalysed chemical reaction. Chilling the two parts simply seems to slow the onset of that reaction so freezing mixed resin wouldn’t gain you anything I don’t think.

People do freeze mixed epoxy putties because it does extend their working time. But with ‘green stuff’ and the like you’re talking a couple of hours of working time instead of a couple of minutes. So the reaction involved is a lot slower.

Exposure to air moisture (ie. when you open the bottles) degrades the resin parts involved (I don’t know the chemistry involved), reducing working times and eventually making the resin useless. Although that can take years in my experience.

]]> By: Ben http://www.tabletop-terrain.com/archives/2007/01/15/730/chilled-not-frozen-polyurethane-resin/comment-page-1/#comment-5087 Ben Sun, 14 Jan 2007 22:20:44 +0000 http://www.tabletop-terrain.com/archives/2007/01/15/730/#comment-5087 So could you freeze mixed resin for later use? Or would the moisture in the freezer still set it off? So could you freeze mixed resin for later use? Or would the moisture in the freezer still set it off?

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