SPI-Chem™ Pioloform^® B Resin

Polyvinyl butyral for the making of TEM grid support films, a TEM replication medium, and as an inner liner between glass sheets.

Explanation of Hazardous Labels

CAS #63148-65-2
Polyvinyl butyral

While not as widely used as some of the other support film materials such as Formvar™ or Parlodion^®, this resin is perceived at least by some users to have a higher thermal stability than either Parlodion or Formvar. Pioloform B, or as it is known chemically, polyvinyl butyral, is also perceived to result in a somewhat thinner film, resulting in less electron scatter for a given film thickness. However, with the discovery that good stable holey films can be made of other resins, especially Formvar which is not even hazardous to handle, this perceived advantage is not such a major advantage after all. It is also sometimes perceived that one sees less "structure" in films cast of Pioloform B, but again where that is an issue, one would normally switch over to the use of holely films of Formvar, for example.

Anyone considering the use of Pioloform B should keep in mind that there is virtually zero water solubility and it is generally used as a 0.25 to 2% solution in chloroform. For best results, the SPI-Chem supplied solution is filtered, before packaging, through a #1 Whatman filter paper. We would recommend a second filtration before use.

For international shipments, the nonhazardous nature of the solid material implies an economic advantage because of lower shipping charges. Just remember that the making of high quality TEM grid support films is truly an "art" and does take most people some amount of time to learn. Therefore, once you have decided to do your own grid coating, then take advantage of some of the tips from the SPI grid coating experts! Or if you would rather short circuit the time otherwise needed to look at your important samples, consider the purchase of grids already custom coated by SPI Supplies.

Pioloform® B Resin

Pioloform® B			SPI #	Each	In Stock
	Resin Powder	10gm	02466-BA	$16.68	Yes
		100gm	02467-MB	154.49	Yes
	2% Pioloform^® B in Chloroform	30ml	02477-AB	21.96	Yes

Storage Conditions: Room Temperature
Pioloform B Resin Powder:Non-hazardous from standpoint of shipping
2% Chloroform Solution:Hazardous from the standpoint of shipping

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SPI-Chem™ Pioloform® B Resin

SPI-Chem™ Pioloform^® B Resin