摘要:
A polyfunctional organohydrogensiloxane and method for its preparation using a boron containing Lewis acid as catalyst is disclosed. A clustered functional organosiloxane may be prepared by a method comprising functionalizing the polyfunctional organohydrogensiloxane. The polyfunctional organohydrogensiloxane and the clustered functional organosiloxane are useful in curable compositions. The polyfunctional organohydrogensiloxane may be used in a release coating composition. The clustered functional organosiloxane may be used in an adhesive composition.
摘要:
A process for end-capping a dimethylsilanol terminated polydiorganosiloxane with one or more di, tri and/or tetra alkoxysilanes in the presence of a basic end-capping catalyst starting material is provided. An acidic stabilizing/neutralising agent is subsequently added. The acidic stabilizing/neutralising agent is selected from one or more fatty acids having from 8 to 26 carbons; an alkane sulphonic acid having from 1 to 10 carbons; acidic fumed silica and/or one or more acidic liquid polybutadienes or a mixture thereof. The resulting capped polymeric material may be utilized as a polymer in, e.g., an organopolysiloxane elastomer composition.
摘要:
The present invention relates to a modified crumb rubber particle having carbon to silicon bonds created by the reaction of the unsaturation in the crumb rubber particle and silicon hydride, with or without the use of a catalyst. Bound silicon content ranges from about 0.1% to 10% by weight. The silicon-modified crumb rubber can be used as is or a reinforcing filler in formulations. Typically the silicon-modified crumb rubber is used in up to 25% by weight of the total rubber present in virgin rubber compositions.
摘要:
This invention teaches the preparation and compositions of POSS nanostructured chemicals bearing a variety of onium-type surfactants. The surfactants serve as low-cost compatibilizing groups for polyhedral oligomeric silsesquioxane and polyhedral oligomeric silicate nanostructures with man-made polymer and biological systems. Variations of the surfactants also provide reactivity for the nanostructured chemicals with man-made and biological materials. The surfactant bearing nanostructured chemicals are useful as alloying agents is for controlling the structure and bulk physical properties of materials from the nanoscopic length scale. Alternately, the surfactants can be eliminated from the nanostructures to render the formation of nanoscopically dispersed silica particles.
摘要:
Cyclic siloxanes that contain releasable active ingredients are described. The active ingredient can be an alcohol or enolizable carbonyl-containing compound such as a ketone, aldehyde, or ester. The product siloxanes are useful in a variety of personal and household care products where slow or controlled release of active ingredient is desired. A preferred embodiment utilizes substituents that when released as active ingredients are fragrant.
摘要:
An uncapped polysiloxane composition is provided having the formula: ##STR1## wherein: R is selected from R.sub.2 or --OR.sub.9 wherein R.sub.9 is hydrogen or alkyl; R.sub.1, which can be the same or different, is selected from R.sub.2, an amine containing group of the formula --(CH.sub.2).sub.n --F.sub.n1 --B.sub.n2 --F--NH.sub.2 functional carboxyl group of the general formula: ##STR2## wherein R.sub.5 is hydrogen, alkyl or alkali metal; F is linear or branched alkylene; B is --NR.sub.9, oxygen or sulfur, wherein R.sub.9 is hydrogen or lower alkyl (C.sub.1-6); R.sub.2 can be the same or different and is selected from alkyl, aryl, alkenyl or alkeynyl; R.sub.3 and R.sub.4, which may be the same or different are selected from alkyl, aryl, capped or uncapped polyoxyalkylene, alkaryl, aralkylene or alkenyl; a is an integer from 0 to 50,000; and b is an integer from 0 to 100.
摘要:
The present invention provides a polymeric liquid-crystal compound having a repeating unit represented by Formula (I) ##STR1## wherein U represents a polymer main chain; V represents --(CH.sub.2).sub.m --, --((CH.sub.2).sub.2 --O).sub.m -- or --(CH.sub.2).sub.n --((CH.sub.2).sub.2 --O).sub.p --, one or more of methylene hydrogen atoms of which may be substituted with an alkyl group, a halogen atom, a cyano group, an amino group or a carbonyl group, and m, n and p each represents an integer of 0 to 30; W represents a single bond, --O--, --OCO--, --COO--, --CONR.sup.1 --, --CO-- or --NR.sup.1, where R.sup.1 represents a hydrogen atom or an alkyl group; X represents two or more rings of a substituted or unsubstituted aliphatic ring or aromatic ring of benzene ring, heteroaromatic ring or condensed ring, which rings are bonded through a single bond, --O--, --OCO--, --COO--, --(CH.sub.2).sub.q --, --N.dbd.N--, --(CH.dbd.CH).sub.q --, --CH.dbd.N--, --(C.tbd.C).sub.q --, --CONR.sup.1 --, --(CO).sub.q --, or --NR.sup.1 --, where q represents an integer of 1 to 10; Y represents a substituted or unsubstituted alkyl group; and the mark * represents an asymmetric carbon atom.
摘要:
A polysiloxane composition is provided having the formula ##STR1## wherein: R.sub.1, can be R.sub.2 or at least one pyrrolidone containing group of the general formula: ##STR2## wherein; R.sub.5 is hydrogen, lower alkyl or alkali metal; F, is linear or branched alkylene of 1-12 carbon atoms; n is 0 or 2; n.sup.1 is 0 or 1; n.sup.2 is 0 or 1; and B is --NR.sub.9, sulfur or oxygen, wherein R, is hydrogen or lower alkyl; with the proviso that when n is 0 and n.sup.2 is 1, n.sup.1 is 1, when n is 2 and n.sup.2 is 1, n.sup.1 is 0 or 1 and when n is 2 and n.sup.2 is 0, n.sup.1 is 0;R.sub.2 is selected from alkyl, aryl and olefinic (vinyl);R.sub.3 and R.sub.4, are selected from alkyl, aryl, capped or uncapped polyoxyalkylene, alkaryl, aralkylene or alkenyl;a is an integer from 0 to 50,000; andb is an integer from 0 to 100.
摘要:
Novel single-ion conducting polymer electrolytes (SPEs) are provided. A first group of polymers are polysiloxanes substituted with fluorinated poly(alkylene oxide) side chains having associated ionic species, while a second group are copolymers containing mer units having the following structures ##STR1## in which R.sup.4 through R.sup.8, x2, x3, y2, y3, z2, and z3 are as defined herein. Also provided are conductive compositions containing these novel polymers, particularly film compositions, and batteries formulated with such films.
摘要:
Liquid crystalline organopolysiloxane is provided having the general formula:R.sub.a (A).sub.b (B).sub.c SiO.sub.(4-a-b-c)/2wherein R is independently selected from the group consisting of a hydrogen atom, hydrocarbon group having i to 4 carbon atoms, and phenyl group, A is a group of the formula: ##STR1## wherein m, n, and x are integers in the range: m.gtoreq.3, n.gtoreq.2, 5.ltoreq.m+nx.ltoreq.15, x=1 or 2, B is an organic chromophore group having an absorption peak in the visible spectrum, a, b, and c are numbers in the range: 1.ltoreq.a