Butarez = Polybutadien

Model networks were prepared using hydroxyl terminated polymer and isocyanates, (a) Bifunctional hydroxyl terminated polybutadiene (Butarez, from Phillips Petroleum) was crosslinkined with tris (p-isocyanatophenyl)-thiophosphate (Desmodur RF, from Mobay Chemical Co.). This crosslinked... 

HMX was first evaluated with hydrocarbon binders (Butarez, a carboxy-terminated polybutadiene, and Butyl rubber) because of their high thermal stability, in addition to the expected advantages of high impetus levels and low flame temps. In the Butarez binder, an 85% HMX level produced an impetus of 370000 ft-lbs/lb and a flame temp of 2540°K. At 84% HMX, the system was under-oxidized, at 86% the flame temp exceeded 2600°K. Because of a less favorable heat of formation, higher HMX loadings were required for the Butyl rubber system, ie, about 87% HMX and 13% Butyl rubber vs 85% HMX and 15% Butarez for an impetus of 370000 ft-lbs/lb. In the hydrocarbon formulations, the Butarez polymer appeared more attractive thermodynamically... 

Butarez = carboxy terminated polybutadiene (german) butanetriol trinitrate 48 BWC = board wood cellulose (UK)... 

Polymer concrete based on two kinds of liquid rubbers was investigated type A, low molecular polybutadiene (Butarez , Liten [1,4-cis 25%-39% 1,4-trans 35%-40%, 1,2-vinyl 28%-35%]) and type B, stereoregular low molecular rubber (Polyoil 110/130 , Ricon (1,4-cis 70%-80% 1,4-trans 20%-30%, 1,2-vinyl l%-2%). The main physical-mechanical properties are shown in Table 2.5. 

PRs have been known since 1925. During World War II, Germany made liquid polybutadiene (LPB) under the trade name Plastikator 32, used as a curable and adhesive plastificant for synthetic rubber. A similar product was obtained in United States in 1950, with the aid of a semi-industrial plant at Borger, Texas, under the trade name Butarez [3]. At the same time, petroleum resins based on indene and styrene and their homologues were produced. Their industrial production started in 1950 [2]. 

The earhest information with regard to oxidized HRs appeared between 1955 and 1966 and relates to oxidized LMWPBs (low molecular weight polybutadienes) launched by Phillips under the trade names Butarez 200 and Butarez 300 [225,226], and to hquid copolymers of butadiene with 20% styrene, obtained by Esso. Research under the trade names Buton 200 and Buton 300 [227—229]. 

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