Pentaerythritol triacetate

Inorganic-organic composition uses are similar to coatings uses except that no substrate is involved. A variety of mixtures can be used in which the colloidal silica is added to impart strength. An example of this type of system was disclosed by Asahi Glass Company, Ltd. (35) colloidal silica was added to isophorone diisocyanate and a pentaerythritol triacetate-tetraacetate mixture to produce a material for a polycarbonate plate. 

In this way Marans, Elrick and Preckel [52] have obtained pentaerythritol monoacetate together with certain amounts of di- and triacetate by heating pentaerythritol tetra-acetate with pentaerythritol at 180-185°C. The monoacetate was nitrated to yield pentaerythritol acetate trinitrate (XII). Careful hydrolysis of the latter produced pentaerythritol trinitrate (XIII) ... 

Amylose triacetate prepared from butanol-precipitated starch may be plasticized with almost any of the common plasticizers which are applicable to the plasticization of cellulose triacetate. For example, some suitable plasticizers are dimethyl or diethyl tartrate, tributyl citrate, tributyl phosphate, tricresyl phosphate, polyethylene glycol, and pentaerythritol tetraacetate. Addition of only 10-20% plasticizer is sufficient to give amylose triacetate films a useful and lasting degree of... 

Finne and Albertsson prepared four-arm star-shaped PLLA using novel spirocyclic tin initiators [77]. Kricheldorf et al. [78] polymerized LLA using bismuth triacetate and pentaerythritol as initiator and coinitiator, respectively. Kim et al. [79] and Arvanitoyannis et al. [80] used Sn(Oct)2 or tetraphenyl tin and pentaerythritol or glycerol, respectively, as the initiator and coinitiator system for LLA polymerization. Similar star-shaped polymers using multifunctional alcohols were reported by Korhonen et al. [81]. 

Figure 3.9 Reaction of polyethers with p-toluene sulfonic acid - gas chromatography. Gas chromatogram of reaction products of polyurethane polyethers (1) propylene glycol diacetate (2) glycerol triacetate (3) trimethylpropane triacetate (4) triethylanolamine triacetate (5) pentaerythritol tetracetate. Gas chromatographic conditions column 1 m x 3 mm, coated with 15% FFAQ on Uniport B, oven 170 °C chart speed 1 cm/s. (b) Gas chromatogram of reaction products of polyurethane polyethers based on amines (1) pyropylene glycol diacetate (2) derivative from 1,2 diaminoethane (3) derivative from 2,2 -diaminodiethylamine. Gas chromatographic conditions Column 1 m x 3 mm packed with 15% SE-30 on Uniport B oven 230 "C chart speed, 1 cm/min.

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