Abstract:
This disclosure relates to a method for the in-situ encapsulation and/or insulation of piping, such as underground piping, particularly underground piping carrying high temperature (e.g. >120o C) fluids, such as steam using silicone-based compositions such as liquid silicone rubber materials and/or silicone foams. This may be done by inserting a hose into a pipe cavity so that a first end of the hose is remotely positioned next to the pipe and a second end of the hose is attached to a pumping system wherein a silicone composition is pumped through the hose and into the cavity surrounding from the remote first end of the tubing at a first predefined rate, the hose is gradually withdrawn from the cavity at a second predefined rate and the silicone material is allowed to cure and become rigid, thereby encapsulating and/or insulating the pipe.
Abstract:
A process to form a crosslinked composition comprising thermally treating a composition at a temperature ≥ 25°C, in the presence of moisture, and wherein the composition comprises the following components: a) an olefin/silane interpolymer, b) a cure catalyst selected from the following: i) a metal alkoxide, ii) a metal carboxylate, iii) a metal sulfonate, iv) an aryl sulfonic acid, v) a tris-aryl borane, vi) any combination of two or more from i)-v). Also, a composition comprising the following components a and b, as described above. A process to form an olefin/alkoxysilane interpolymer, and the corresponding composition, said process comprising thermally treating a composition comprising the following components: a) an olefin/silane interpolymer, b) an alcohol, and c) a Lewis acid.
Abstract:
A composition for forming a foamed silicone elastomer is disclosed. The composition comprises: A) an organopolysiloxane having at least two silicon-bonded ethylenically unsaturated groups per molecule; B) an organohydrogensiloxane having at least two silicon-bonded hydrogen atoms per molecule; C) a hydrosilylation catalyst; D) a chemical blowing agent; and E) a physical blowing agent. The hydrosilylation catalyst C) is present in a catalytically effective amount. The chemical blowing agent D) has at least one hydroxyl (OH) group, and is present in an amount to provide a OH content > 0 and
Abstract:
Silicone foam compositions for forming foamed silicone elastomers are described herein, together with the respective foamed silicone elastomers formed therefrom and to methods of making such compositions and foamed silicone elastomers. The silicone rubber foam composition comprising: (a) one or more organopolysiloxane polymers having an average of at least two epoxide groups per molecule; (b) a Lewis acid catalyst, (c) one or more surfactants and optionally (d) a physical blowing agent. The foamed silicone elastomers are prepared by either mechanically foaming components (a), (b) and (c); or by introducing a physical blowing agent (d); and causing foaming by physical blowing.
Abstract:
This disclosure relates to silicone foam compositions for forming foamed silicone elastomers, the respective foamed silicone elastomers formed therefrom and to methods of making such compositions and foamed silicone elastomers. The silicone rubber foam composition comprises the (a) one or more organosilicon compounds having an average of at least two silicon bonded alkoxy groups per molecule selected from one or more silicone resins and/or silicone resin intermediates; (b) a Lewis acid catalyst; (c) one or more surfactants; and (d) one or more organopolysiloxane polymers having an average of at least two, alternatively at least three silicon bonded hydrogen groups per molecule.
Abstract:
This disclosure relates to continuous methods of making foamed silicone elastomers and the compositions used for forming the foamed silicone elastomers in said methods. The compositions utilised comprise i) an organopolysiloxane having at least two silicon-bonded unsaturated groups per molecule; ii) an organohydrogensiloxane having at least two silicon-bonded hydrogen atoms per molecule; iii) a hydrosilylation catalyst; and iv) a physical liquid blowing agent. Foamed silicone elastomers are prepared from such compositions.
Abstract:
A rigid polyurethane foam formulation comprising a polyester polyol having a hydroxyl number of from 150 to 600 mg KOH/g and a functionality of at least 2, a blowing agent comprising water and an auxiliary blowing agent, a non-silicone organic surfactant, greater than 0.1% to less than 3.7% of a cyclic siloxane, by weight based on the total weight of the foam formulation, a catalyst, and optionally a flame retardant; and a polyisocyanate; such that the isocyanate index is in the range of from 100 to 500, a rigid polyurethane foam formed from the foam formulation; and a method of forming a rigid polyurethane foam.
Abstract:
Coated proppant particles are prepared from a coating composition that includes at least one polyisocyanate and an isocyanate trimerization catalyst. The coating composition preferably is devoid of an effective amount of a urethane, urea and carbodiimide catalyst. The coating composition cures rapidly at moderate temperatures, and bonds to itself well under conditions of heat and pressure as are experienced by the particles in subterranean formations.
Abstract:
A novel byproduct compound having the following chemical formula B; wherein R is hydrogen or CH 3 ; a composition including an admixture of: (A) a product having the following chemical formula A; wherein R is hydrogen or CH 3 ; and (B) the above novel byproduct compound having the chemical formula B; and a composition including a reaction product of: (a) an aromatic epoxy resin; (b) hydrogen; (c) a catalyst; and (d) a solvent; wherein the reaction product produced is a cycloaliphatic epoxy resin admixture of the combination of (i) the above product having the chemical formula A and (ii) the novel byproduct compound having the chemical formula B; wherein the above product having the chemical formula A includes at least a cis-cis isomer, a cis-trans isomer, and a trans-trans isomer; and the novel byproduct compound having the chemical formula B includes at least a cis isomer and a trans isomer.
Abstract:
The present invention relates to compositions and methods for reducing or preventing the loss of drilling fluids and other well servicing fluids into a subterranean formation during drilling or construction of boreholes in said formation. Specifically, this invention comprises a curable thermosetting composition comprising a polyfunctional (meth)acrylate, a polyfunctional (meth)acrylamide, or mixture thereof, one or more epoxy resin, and one or more (cyclo)aliphatic polyamine.