Topic
Hydroxyl-terminated polybutadiene
About: Hydroxyl-terminated polybutadiene is a research topic. Over the lifetime, 482 publications have been published within this topic receiving 6768 citations. The topic is also known as: HTPB.
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Patent•
15 Dec 1995
TL;DR: An aqueous reaction mixture having a pH of 45 to 55 of a methyl terminated siloxane emulsified polymer, a methyl triethoxysilane, a mixture of nonyl and octyl phenol derivative surfactants, fluorinated alkyl ester surfactant and synthetic ethoxylated amine surfact agents, a silanol terminated polydimethylsiloxane hydroxyl terminated polybutadiene and ethanol was used in this paper.
Abstract: An aqueous reaction mixture having a pH of 45 to 55 of a methyl terminated siloxane emulsified polymer, a methyl triethoxysilane, a mixture of nonyl and octyl phenol derivative surfactants, fluorinated alkyl ester surfactant and synthetic ethoxylated amine surfactants, a silanol terminated polydimethylsiloxane hydroxyl terminated polybutadiene and ethanol The reaction mixture is coated on a mold core surface and cured with heat to form a mold release surface that can be used in excess of twelve times prior to recoating
362 citations
Patent•
28 Jan 1972TL;DR: In this paper, the improvement in the bonding relationship between glass fibers and elastomeric materials was addressed, in which glass fibers were treated with a functional organo silicon compound containing at least one of an amino, a hydroxy or an epoxy group, and then treated either with a polyurethane prepolymer containing free isocyanates or an organic polyisocyanate for subsequent reaction with free hydroxyl groups.
Abstract: This invention is addressed to the improvement in the bonding relationship between glass fibers and elastomeric materials in which glass fibers are treated with a functional organo silicon compound containing at least one of an amino, a hydroxy or an epoxy group, and then the glass fibers are treated either with a polyurethane prepolymer containing free isocyanates or an organic polyisocyanate for subsequent reaction with free hydroxyl groups, or a polyurethane prepolymer or a polyhydroxylated compound. The polyurethane prepolymer containing free isocyanate groups may be prepared by reaction of excess polyisocyanate with a hydroxyl terminated polybutadiene or a polyhydroxylated polyester prepared by reaction of a polyol with a polycarboxylic acid of anhydride containing ethylenic unsaturation. These prepolymers are capable of undergoing co-cure or vulcanization with elastomeric material.
172 citations
TL;DR: The results of a systematic experimental investigation on the methods of enhancing the regression rate in hydroxyl-terminated polybutadiene (HTPB) fuel used in an HTPB/gaseous oxygen hybrid motor are presented in this paper.
Abstract: The results of a systematic experimental investigation on the methods of enhancing the regression rate in hydroxyl-terminated polybutadiene (HTPB) fuel used in an HTPB/gaseous oxygen hybrid motor are presented The effects of the addition of ammonium perchlorate (AP) or aluminum in the fuel, the variation of oxidizer ‐fuel ratio, and the variation of characteristic dimensions of fuel grain are presented For the extents of the parametric variations considered, while the addition of AP and/or Al and the reduction of grain port diameter enhance the regression rate, the effect due to the latter is the most signie cant one Furthermore, the regression rate increases along theaxis, and it becomes essentially constant in the port region corresponding to a fuel-rich composition The possible physical processes for all of these behaviors are discussed The experimentally obtained exponents of the variables for regression rate (oxidizer mass e ux and port diameter ) are found to be signie cantly different from those of the conventional theory The similarity between the fuel regression rate equation used in solid-fuel ramjet and that obtained in hybrid motor is discussed
122 citations
TL;DR: In this article, a polyurethane network containing allophanate groups, based on hydroxyl terminated polybutadiene and various diisocyanates, was synthesized at various NCO/OH equivalence ratios (r-values) ranging from 1.0 to 1.5.
106 citations
TL;DR: The decomposition chemistry and kinetics of diisocyanate-linked hydroxyl-terminated polybutadiene (HTPB) were determined by TGA, DSC, and IR spectroscopy at 10°C/min and by SMATCH/FTIR at 250°
105 citations