摘要:
A process for preparing cross-linked, modified organopolysiloxanes which comprises polymerizing at least one monomer having at least one aliphatic multiple bond in the presence of a free radical initiator and at least one cross-linked organopolysiloxane containing at least 40 mol percent of monoorganosiloxane units. When the organopolysiloxane is not crosslinked, then the polymerization of the monomer having at least one aliphatic multiple bond is conducted in the presence of an organopolysiloxane having at least 40 mol percent mono-organosiloxane units, and a free radical initiator and a catalyst which promotes cross-linking of the organopolysiloxane.
摘要:
Aqueous organopolysiloxane compositions containing a dispersed solid organopolysiloxane resin bearing both alkoxy and hydroxy radicals, a condensation catalyst, and a wetting agent are suitable for use as binders for the preparation of structures based on mineral fibers.
摘要:
An aqueous 1-component composition which forms a resilient silicone network on drying and is obtained by reaction, at a temperature of at least 40° C., of I) a surfactant-stabilized dispersion of a highly crosslinked silicone compound which carries reactive groups which are selected from silanol, hydrocarbon-oxy and silanolate groups with II) a surfactant-stabilized emulsion of optionally precrosslinked silicone oil which carries reactive groups which are selected from silanol, hydrocarbon-oxy and silanolate groups.
摘要:
The invention relates to novel polymeric organosilicon compounds comprising hydrocarbon radicals with at least one aliphatic carbon-carbon double bond in a terminal position. To produce these compounds, (A) compounds containing at least one aliphatic carbon-carbon double bond per molecule, in a terminal position, are reacted with (B) oligomeric or polymeric organosilicon compounds containing units of the general formula R1R2SiO1/2 and units of the general formula HRSiO and/or HSiO3/2 and possibly units of the general formula R2SiO, where R is a monovalent, possibly substituted, hydrocarbon radical with between 1 and 18 carbon atoms per radical, which is free of aliphatic carbon-carbon double bonds, and R1 is a monovalent hydrocarbon radical with between 1 and 18 carbon atoms per radical which has at least one aliphatic carbon-carbon double bond in a terminal position, subject to the condition that the sum of the units HRSiO and R1R2SiO1/2 on average is greater than 2.0 if (B) contains no HSiO3/2 units, and the number of R1 radicals per molecule is greater than the number of Si-bonded hydrogen atoms, in the presence of (C) catalysts promoting the addition of Si-bonded hydrogen to aliphatic double-bonds. The ratio of aliphatic double bonds in components (A) and (B) to Si-bonded hydrogen in component (B) is between 1.5 and 10, subject to the condition that the polymeric organosilicon compounds on average contain more than two hydrocarbon radicals with at least one aliphatic carbon-carbon double bond in a terminal position.
摘要:
Organopolysiloxane particles useful as catalysts, are cross-linked, comprise a single molecule, have chemically bound metallic compounds and an average diameter of from 5 to 200 nm and are soluble in at least one solvent chosen from dichloromethane, pentane, acetone, ethanol and water to at least 1% by weight. At least 80% of the particles have a diameter which deviates a maximum of 30% from the average diameter.
摘要:
The present invention relates to triazine-containing organosilicon compounds having units of the formulaA.sub.a R.sub.b X.sub.c SiO.sub.(4-a-b-c)/2 (I),whereR is identical or different and denotes a hydrogen atom or a monovalent substituted or unsubstituted hydrocarbon radical, having 1 to 26 carbon atoms, preferably 1 to 18 per radical,X is identical or different and is a halogen atom, a chlorine atom or a radical of the formula --OR.sup.1, where R.sup.1 denotes an alkyl radical, having 1 to 18 carbon atoms, preferably 1 to 8 per radical and which may be substituted by an ether oxygen atom,a is 0 or 1, preferably 0.01-0.5b is 0, 1, 2 or 3, preferably 0.5-3.0c is 0, 1, 2 or 3, preferably 0.0-2.0 and the sum a+b+c.ltoreq.4, preferably 0.1-3.5, andA is a radical of the formula ##STR1## where R.sup.2 is an unbranched or branched, optionally substituted alkylene radical, having 1 to 18, preferably 1 to 12, carbon atoms,Y is identical or different and denotes a hydrogen atom or an unbranched or branched alkyl radical, having 1 to 12, preferably 1 to 8, carbon atoms or denotes a radical of the formula --OR.sup.1, where R.sup.1 has the meaning given above, andZ is identical or different and denotes X, --NR.sub.2, --(O)CR or --SR, where X and R have the meanings given above with the proviso that at least one radical A containing at least one halogen atom, preferably a chlorine atom, is present per polymer molecule.
摘要翻译:本发明涉及具有式AaRbXcSiO(4-abc)/ 2(I)单元的含三嗪的有机硅化合物,其中R相同或不同,表示氢原子或一价取代或未取代的烃基,其具有1至 26个碳原子,优选1至18个基团,X相同或不同,为卤素原子,氯原子或式-OR1基团,其中R1表示具有1至18个碳原子的烷基,优选1 至8个,并且可被醚氧原子取代,a为0或1,优选为0.01-0.5b为0,1,2或3,优选0.5-3.0c为0,1,2或3,优选为 总和a + b + c 4,优选0.1-3.5,A是下式的基团,其中R 2是无支链或支链的任选取代的亚烷基,其具有1至18,优选1至 12,碳原子,Y相同或不同,表示氢原子或无支链或支链烷基,具有1至12个, 优选为1〜8个碳原子,或表示式-OR1的基团,其中R1具有上述含义,Z相同或不同,表示X,-NR2, - (O)CR或-SR,其中X和 R具有上述含义,条件是每个聚合物分子存在至少一个含有至少一个卤素原子,优选氯原子的基团A.
摘要:
Compositions obtained by mixing oxygen-containing phosphazenes with tertiary alcohols at a temperature of from 0.degree. C. to 70.degree. C. and a pressure of from 900 to 1100 hPa are useful in processes for equilibrating and/or condensing organosilicon compounds.
摘要:
The present invention provides crosslinkable compositions comprising (A) an organosilicon compound having radicals containing aliphatic carbon-carbon multiple bonds, (B) an organosilicon compound having Si-bonded hydrogen atoms, (C) a catalyst which promotes the addition of Si-bonded hydrogen onto aliphatic multiple bond, and optionally (D) an agent which retards the addition of Si-bonded hydrogen onto aliphatic multiple bond at room temperature and to the use of the crosslinkable compositions for producing coatings which repel tacky substances. The present invention also relates to organosilicon compounds having Si-bonded hydrogen atoms, and to a process for their preparation.
摘要:
The invention relates to a process for stabilizing organopolysiloxanes which contain phosphazenes and/or their reaction products which promote the condensation and/or equilibration of organopolysiloxanes. To stabilize any previously known organopolysiloxanes which contain phosphazenes and/or their reaction products against re-arrangements and also molecular weight changes and viscosity changes resulting therefrom, it is proposed that the said phosphorus compounds be brought into contact with at least one non-basic, solid adsorbent.
摘要:
Organopolysiloxanes which contain ester groups and comprise units of the formula ##EQU1## in which R may be an identical or different monovalent, SiC-bonded hydrocarbon radical having 1 to 18 carbon atoms,A may be an identical or different radical of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.3, c, v, w, s, t,is 0 or an integer, the sum of s and tbeing an integer from 1 to 20,x is 0 or 1,y is 0 or 1, the sum of x and y being 1 or 2,a is 0, 1, 2 or 3, andb is 0, 1 or 2,with the proviso that the sum of a and b is less than or equal to 3 and the organopolysiloxane contains at least one radical A per molecule.