Abstract:
Textiles substrates, e.g., cotton fabrics, are conditioned to impart good feel and hydrophilicity thereto, by impregnating same with an effective conditioning amount of a polydiorganosiloxane containing, per mole, at least two structural units of the formula:XR.sub.a SiO.sub.(3-a)/2in which X is a radical: ##STR1## R' is a linear or branched C.sub.2 -C.sub.8 alkylene radical; R" is a hydrogen atom or a C.sub.1 -C.sub.6 alkyl radical; the radicals R, which may be identical or different, are each a phenyl radical, a 3,3,3-trifluoropropyl radical or an alkyl radical having from 1 to 4 carbon atoms; a is either 1 or 2; n is a number ranging from 1 to 10; and t is 0 or 1.
Abstract:
Process for conditioning textile materials in order to enable them to have, especially, a pleasant handle and a very low or even non-existent yellowing, characterized in that the textile materials are brought into contact with a composition comprising a polyorganosiloxane having, per mole, at least one unit of general formula: ##EQU1## in which: R can represent a C.sub.1 -C.sub.4 alkyl radical;X can represent a hydrolysable radical;Z represents a residue containing (a) sterically hindered piperidyl group(s) of formulae: ##STR1## in which R.sup.1 is a divalent hydrocarbon radical, R'.sup.1 is a trivalent hydrocarbon radical, U and U' represent --O--, --NH-- or --N(alkyl)--, R.sup.2 can represent a C.sub.1 -C.sub.3 alkyl radical and R.sup.3 is H or R.sup.2,a and b are chosen from 0, 1 and 2,the sum a+b being not greater than 2.
Abstract:
Novel diorganopolysiloxanes containing benzalmalonate functional groups, well adapted as coatings for optical fibers, as well as lubricants for plastic substrates, e.g., PVC substrates, have one of the following formulae: ##STR1## in which A and/or B is a benzalmalonate radical.
Abstract:
Modified polymers based on a graft polyester comprising:a backbone derived from a water-dispersible sulphonated polyesterand grafts consisting of copolymer units derived from at least one vinyl monomer and at least one ethylenically unsaturated organopolysiloxane soluble in the said vinyl monomer or monomers.They are prepared by:preemulsion, in water, of a solution of an organopolysiloxane in one or more vinyl monomersfollowed by addition of the emulsion obtained to an aqueous solution of a water-dispersible sulphonated polyester and polymerization in the presence of a water-soluble or water-dispersible initiator.They can be used as coating agents.
Abstract:
Linear and cyclic diorganopolysiloxanes containing benzotriazole functional groups are well suited for the coating of optical fibers and for lubricating plastics, e.g., PVC.
Abstract:
The invention concerns a method for extracting by electrodialysis a compound comprising at least amine functions capable of protonation from a liquid medium. More particularly it concerns a method for extracting, and separating at least the monomers comprising amine functions capable of protonation from a liquid medium derived from the hydrolysis of polyamides. The method of extraction from a liquid medium consists in subjecting to protonation the amine function(s) of the compounds to be extracted by adjusting the pH of the medium and in separating the compounds by passing them through a cationic membrane under the effect of an electric current. The invention is particularly applicable in processes for the chemical stabilisation of polyamides such as the PA 66 PA 6.
Abstract translation:本发明涉及通过电渗析从液体介质中提取至少包含能够质子化的胺官能团的化合物的方法。 更具体地说,本发明涉及至少从包含衍生自聚酰胺水解的液体介质中分离含有能够质子化的胺官能团的单体的方法。 从液体培养基中提取的方法是通过调节培养基的pH并通过将化合物通过阳离子膜分离化合物来进行质子化的化学物质的胺官能团 当前。 本发明特别适用于PA 66 PA 6等聚酰胺的化学稳定化方法。
Abstract:
Organopolysiloxane oils comprising acrylate and/or methacrylate functional groups, well adapted as additives for silicone elastomers, or for UV-curable silicone coating compositions, are prepared by transesterifying an organopolysiloxane including at least one (HOY)R.sub.2 SiO.sub.0.5 or (HOY)RSiO.sub.2/2 recurring unit, with a lower alkyl (meth)acrylate having the formula CH.sub.2 .dbd.CR'OCOR", in the presence of a catalytically effective amount of a tin compound.
Abstract:
Process for conditioning textile materials in order to enable them to have, especially, a pleasant handle and a very low or even non-existent yellowing, characterized in that the textile materials are brought into contact with a composition comprising a polyorgano-siloxane having, per mole, at least one unit of general formula: ##EQU1## in which: R can represent a C.sub.1 -C.sub.4 alkyl radical; X can represent a hydrolysable radical; Z represents a residue containing (a) sterically hindered piperidyl group(s) of formulae: ##STR1## in which R.sup.1 is a divalent hydrocarbon radical, R'.sup.1 is a trivalent hydrocarbon radical, U and U' represent --O--, --NH-- or --N(alkyl)-, R.sup.2 can represent a C.sub.1 -C.sub.3 alkyl radical and R.sup.3 is H or R.sup.2, a and b are chosen from 0, 1 and 2, the sum a+b being not greater than 2.
Abstract:
Linear and cyclic diorganopolysiloxanes containing dibenzoylmethane functional groups are well suited for the coating of optical fibers and for lubricating plastics, e.g., PVC.
Abstract:
3-Benzylidenecamphor-substituted diorganopolysiloxanes, well adopted for incorporation into coating and lubricant compositions (notably as a lubricant for PVC), have the structural formulae (1) and (2) ##STR1## wherein A and/or B is a 3-benzylidenecamphor moiety.