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Looking at a European Maker's site and he lists Methacrylate as his stem material. Anyone know what it is? bob gilbert

Bone cement!

http://en.wikipedia.org/wiki/Methacrylate

It's very simple, Bob. Methacrylates contain methyl-vinyl groups, that is, two carbon atoms double bonded to each other, directly attached to the carbonyl carbon, and wherein the vinyl group is substituted with a non-terminal methyl group.

I'm surprised you did not know this.

Rad

RadDavis wrote:It's very simple, Bob. Methacrylates contain methyl-vinyl groups, that is, two carbon atoms double bonded to each other, directly attached to the carbonyl carbon, and wherein the vinyl group is substituted with a non-terminal methyl group.

Bone cement!

I see, you guys are just as dumb as I am and don't have the foggiest idea what it is. bob

It's modern version of acrylic, it has a few more additives to help avoid brittleness and melting.

RadDavis wrote:It's very simple, Bob. Methacrylates contain methyl-vinyl groups, that is, two carbon atoms double bonded to each other, directly attached to the carbonyl carbon, and wherein the vinyl group is substituted with a non-terminal methyl group.

I'm surprised you did not know this.

Rad

Not only is Rod Davies a gifted pipe maker, but now I find he is gifted intellectual. Hell, he just might be the savant of all pipe makers.

RadDavis wrote:It's very simple, Bob. Methacrylates contain methyl-vinyl groups, that is, two carbon atoms double bonded to each other, directly attached to the carbonyl carbon, and wherein the vinyl group is substituted with a non-terminal methyl group.

I'm surprised you did not know this.

Rad

Duh.