Abstract: There is provided a process for stabilizing additive concentrates comprising or consisting of one or more additives in dialkylsilanol terminated polydiorganosiloxane polymers for use in condensation curable organosiloxane compositions. Processes for making condensation curable organosiloxane compositions incorporating the additive concentrates as well as the use of the stabilized additive concentrates in condensation cure organosiloxane compositions are also described. The stabilizer used is a polydialkylsiloxane having the general formula: R33—Si—O—((R2)2SiO)d—Si—R33 where R2 is an alkyl or phenyl group, each R3 group may be the same or different and are selected from R2 alkenyl or alkynyl groups and the average value of d is between 7 and 20, in an amount of from 0.5 to 5 wt. % of the composition.

Abstract: An automated laboratory apparatus for dynamically testing the durability of a coating is provided. The apparatus includes an actuator that drives at least one test unit. Each test unit includes a pressure chamber assembly having a main body and a clamping member. The main body includes a monitoring window, an opening, and an inner chamber wall defining a pressure chamber within the main body. The clamping member includes a central opening. The clamping member and main body are adapted to sandwich a substrate including the coating therebetween to close the pressure chamber. A driven member extends through the central opening in the clamping member and is contactable with the substrate. The actuator drives one or both of an oscillating linear and an oscillating rocking motion of the driven member. A method of testing the durability of a tire coated with a self-sealing sealant for leak-proof performance is also provided.

Abstract: This disclosure relates to continuous methods for making foamed silicone products using at least one blowing agent which is a non-flammable and/or inert gas at 0° C. (zero ° C.) and atmospheric pressure (approximately 101,325 Pa). Multiple-part silicone foam compositions used for forming foamed silicone products in the methods, and the resulting foamed silicone product formed from such compositions are also disclosed. The blowing agent may be carbon dioxide, air or nitrogen.

Abstract: There is provided a process for stabilizing additive concentrates comprising or consisting of one or more additives in dialkylsilanol terminated polydiorganosiloxane polymers for use in condensation curable organosiloxane compositions. Processes for making condensation curable organosiloxane compositions incorporating the additive concentrates as well as the use of the stabilized additive concentrates in condensation cure organosiloxane compositions are also described. The stabilizer used is a polydialkylsiloxane having the general formula: R33—Si—O—((R2)2SiO)d—Si—R33 where R2 is an alkyl or phenyl group, each R3 group may be the same or different and are selected from R2 alkenyl or alkynyl groups and the average value of d is between 7 and 20, in an amount of from 0.5 to 5 wt. % of the composition.

Abstract: This disclosure relates to a method for the in-situ encapsulation and/or insulation of piping using silicone-based compositions such as liquid silicone rubber materials and/or silicone foams. The method is useful for encapsulation and/or insulation of underground piping, particularly underground piping carrying high temperature (e.g., >120° C.) fluids, such as steam. The in-situ encapsulation and/or insulation 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. 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, and the hose is gradually withdrawn from the cavity at a second predefined rate. The silicone material is allowed to cure and become rigid, thereby encapsulating and/or insulating the pipe.

Abstract: A hydrosilylation curable silicone elastomeric coating composition, which generally has a low viscosity to be self-leveling and/or which is designed for coating transparent substrates (such as glass) is provided, as well as a coated article comprising a substrate coated with a silicone elastomeric coating and the preparation and use thereof. The composition comprises: (i) at least one polydiorganosiloxane polymer having a viscosity of from 0.10 to 1,000 Pa.s at 25° C. and having at least two alkenyl and/or alkynyl groups per molecule; (ii) reinforcing filler comprising an MQ resin and optionally silica; (iii) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule; (iv) a hydrosilylation catalyst; and (v) an adhesion promoter.

Abstract: The present invention provides curable moldable compositions comprising from 10 to 80 volume % of heat resistant fiber compositions, a two component resin mixture of (i) one or more epoxy resins, and (ii) a hardener comprising a combination of triethylenetetraamine (TETA) and from 3 to 15 wt. %, based on the weight of the TETA, of 2-phenylimidazole (2-PI). The compositions cure to provide composite articles having a short demold time of 90 s or less at 130° C. and 101 kPa and a high DSC glass transition temperature (Tg) of from 130 to 180° C. when cured at 130° C. for 90 seconds at a pressure of 101 kPa. The invention enables lightweight, heat resistant composite articles, such as for use in automotive applications.

Abstract: The instant invention provides an isocyanate trimerisation catalyst system, a precursor formulation, a process for trimerising isocyanates, rigid foams made therefrom, and a process for making such foams. A trimerisation catalyst system comprising (a) a phosphonium cation; and (b) an isocyanate-trimer inducing carboxylate anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C. is provided.

Abstract: A lubricant composition comprises a cycloaliphatic amine alkoxylate and a base oil selected from (a) a polyalkylene glycol; (b) a polyalphaolefin; (c) a naphthenic compound; and (d) combinations thereof; provided that the cycloaliphatic amine alkoxylate and the base oil are miscible. The lubricant may exhibit a viscosity change at 40° C. of less than 5 percent (%) after 13 days at 120° C. in dry air, indicating significant thermoxidative stability with minimal or no aromatic content, thereby enabling use of Groups II and III base oils, in particular, without reduced toxicity and/or quality concerns as compared with Group I base oil lubricants.

Abstract: A lubricant composition comprises a cycloaliphatic amine alkoxylate and a base oil selected from (a) a polyalkylene glycol; (b) a polyalphaolefin; (c) a naphthenic compound; and (d) combinations thereof; provided that the cycloaliphatic amine alkoxylate and the base oil are miscible. The lubricant may exhibit a viscosity change at 40° C. of less than 5 percent (%) after 13 days at 120° C. in dry air, indicating significant thermoxidative stability with minimal or no aromatic content, thereby enabling use of Groups II and III base oils, in particular, without reduced toxicity and/or quality concerns as compared with Group I base oil lubricants.

Abstract: A modified natural oil made from reacting at least one natural oil or fat comprising at least one ene moiety with at least one of an enophile or dienophile mixture to form at least one modified natural oil, and reacting the at least one modified natural oil which may be used in a variety of processes.

Abstract: The instant invention provides an isocyanate trimerisation catalyst system, a precursor formulation, a process for trimerising isocyanates, rigid foams made therefrom, and a process for making such foams. The trimerisation catalyst system comprises: (a) an imidazolium or imidazolinium cation; and (b) an isocyanate-trimer inducing anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C. The precursor formulation comprises: (1) at least 25 percent by weight of polyol, based on the weight of the precursor formulation; (2) less than 15 percent by weight of a trimerisation catalyst system, based on the weight of the precursor formulation, comprising; (a) an imidazolium or imidazolinium cation; and (c) an isocyanate-trimer inducing anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C.

Abstract: The instant invention provides an isocyanate trimerisation catalyst system, a precursor formulation, a process for trimerising isocyanates, rigid foams made therefrom, and a process for making such foams. The trimerisation catalyst system comprises: (a) a phosphatrane cation; and (b) an isocyanate-trimer inducing anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73 C.

Abstract: The instant invention provides an isocyanate trimerisation catalyst system, a precursor formulation, a process for trimerising isocyanates, rigid foams made therefrom, and a process for making such foams. The trimerisation catalyst system comprises: (a) a phosphonium cation; and (b) an isocyanate-trimer inducing anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C. The precursor formulation comprises (1) at least 25 percent by weight of polyol, based on the weight of the precursor formulation; (2) less than 15 percent by weight of a trimerisation catalyst system, based on the weight of the precursor formulation, comprising; (a) a phosphonium cation; and (c) an isocyanate-timer inducing anion; wherein said trimerisation catalyst system has a trimerisation activation temperature in the range of equal to or less than 73° C.

Abstract: A method for producing a bigel, the method comprising: (a) providing an oleogel comprising at least one oily agent gelled with at least one cellulose polymer; (b) providing an aqueous gel comprising at least one component whose viscosity is pH dependent, such as a carbomer; (c) mixing the oleogel and the aqueous gel together to form a bigel; and (d) subsequently adjusting the viscosity of the bigel under high flow and low shear stirring to obtain a bigel of a desired viscosity.