Abstract:
The disclosure herein relates to organofunctional silanes and mixtures of organofunctional silanes possessing mercaptan and hydrocarbyl and/or heterocarbyl functionality. These silanes reduce or eliminate the generation of volatile organic compounds (VOC's) during use, aid in the processing of filled elastomeric materials and enhance the end-use properties of the filled elastomer. The present disclosure relates to a rubber composition and article comprising these silanes.
Abstract:
Thermal interface compositions contain both non-electrically conductive micron-sized fillers and electrically conductive nanoparticles blended with a polymer matrix. Such compositions increase the bulk thermal conductivity of the polymer composites as well as decrease thermal interfacial resistances that exist between thermal interface materials and the corresponding mating surfaces. Such compositions are electrically non-conductive. Formulations containing nanoparticles also show less phase separation of micron-sized particles than formulations without nanoparticles.
Abstract:
A two-part moisture-curable resin composition comprises: a) a first part substantially free of moisture comprising: (1) moisture-curable silylated resin and, (2) optionally, one or more additional components selected from the group consisting of plasticizer, solvent, thixotropic agent, particulate material, moisture scavenger, isocyanate scavenger, crosslinker, adhesion promoter, U.V. stabilizer and antioxidant; and, b) a second part comprising: (1) water in an amount sufficient to cure moisture-curable silylated resin (a)(1); (2) at least one plasticizer and/or particulate material, (3) nonionic surfactant in an amount sufficient to provide a stable emulsion of plasticizer (b)(2), if present, and a stable suspension of particulate material (b)(2), if present, (4) optionally, one or more additional components selected from the group consisting of solvent, thixotropic agent, pH adjuster, U.V. stabilizer and antioxidant, provided, the first part and/or the second part further comprises catalyst (c) for the condensation reaction of hydrolyzed moisture-curable silylated resin (a)(1).
Abstract:
Silane compositions of the general formula are provided herein comprising [(RO)x(R1)(3-x)—Si-Mt]q-L-[(Ra)cAr—(CR2═CR22)y]z wherein R and R1 are independently a hydrocarbon group of from 1 to about 20 carbon atoms; R2 are each independently hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; M optionally is a divalent hydrocarbon connecting group of from 1 to about 20 carbon atoms to link the silicon atom and the L group; L is a covalently bound hydrocarbon linking group of from 1 to about 20 carbon atoms or a heteroatom linking group selected from the group consisting of —O—, —S—, —NR3— wherein R3 is hydrogen or a hydrocarbon group of from 1 to about 20 carbon atoms; Ra is an alkyl group of 1 to 12 carbon atoms; Ar is a substituted or unsubstituted aromatic group; q is an integer of 1 to 4; t and c are each independently 0 or 1; and x, y and z are each independently integers of 1 to 3, inclusive, with the proviso that t is 1 when L is a heteroatom group. Also provided are processes for preparing the silane compositions and rubber composition comprising the silane compositions.
Abstract translation:本文提供的硅烷组合物包括<?in-line-formula description =“In-line Formulas”end =“lead”?> [(RO)x(R1)(3-x)-Si-Mt] qL- [(Ra)cAr-(CR2-CR22)y] z <βin-line-formula description =“In-line Formulas”end =“tail”?>其中R和R 1独立地为1 至约20个碳原子; R 2各自独立地为氢或1〜约20个碳原子的烃基; M任选是1至约20个碳原子的连接硅原子和L基团的二价烃连接基团; L是共价键合的1至约20个碳原子的烃连接基团或选自-O - , - S - , - NR 3 - 的杂原子连接基团,其中R 3是氢或1〜 约20个碳原子; Ra是1〜12个碳原子的烷基; Ar是取代或未取代的芳基; q为1〜4的整数, t和c各自独立地为0或1; 并且x,y和z各自独立地为1〜3的整数,条件是当L为杂原子基团时,t为1。 还提供了制备包含硅烷组合物的硅烷组合物和橡胶组合物的方法。
Abstract:
A boron nitride composition having its surface treated with a coating layer comprising at least one of a silane, a siloxane, a carboxylic derivative, and mixtures thereof, wherein the coating layer adheres to at least 10% of the surface of the boron nitride. The boron nitride powder surface is first treated by either a calcination process, or by coating with at least an inorganic compound for the surface to have a plurality of reactive sites containing at least a functional group that is reactive to at least one functional group of the final coating layer.
Abstract:
A process for crosslinking polymers employs a silane crosslinker which, upon hydrolysis, produces a reduced quantity of volatile organic compound.
Abstract:
Disiloxane compounds of the formula MM′ Where M comprises either branched allyl hydrocarbon substituents or silanyl substituents and M′ comprises an alkylpolyalkyleneoxide substituent. The disiloxane compounds of the invention exhibit an enhanced resistance to hydrolysis outside a pH range ranging from 6 to 7.5, and are useful as surfactants.
Abstract:
The present invention provides for a curable composition comprising the reaction product of a silanol terminated silicone resin, a silanol terminated siloxane polymer and a silazane. The present invention also provides for the cured composition resulting from the curable composition and articles coated with the composition. The compositions of the present invention are corrosion resistant barrier coatings that are substantially chromium free.
Abstract:
High tear strength, low hardness silicone elastomer-forming composition is provided using a unique combination(s) of polyorganosiloxanes and organohydrogenpolysiloxanes, where the polyorganosiloxanes and the organohydrogenpolysiloxanes contain both straight-chain and resinous polyorganosiloxanes.
Abstract:
A silylated dihydroxy aromatic compound of the formula (1a); wherein Ga and Gb are each independently C1-12 alkyl, —OSi(C1-12 alkyl)3, C1-12 arylalkyl, or —OSi(C1-12 arylalkyl)3; Za and Zb are each independently a straight or branched C2-18 alkylene, a C8-18 arylalkylene, or a C8-18 alkylarylene, Xa is a direct bond, a heteroatom-containing group, or a C1-18 organic group, and r and s are each independently 1 or 2 is disclosed.