摘要:
The present invention relates to mixtures of catenate and cyclic siloxane oligomers of the formulae I and II where the substituents R consist of (i) aminopropyl-functional groups of the formula —(CH2)3—NH2 or —(CH2)3—NHR′ or —(CH2)3—NH(CH2)2—NH2 or —(CH2)3—NH(CH2)2—NH(CH2)2—NH2,in which R′ is a linear, branched or cyclic alkyl group of 1 to 18 carbon atoms or an aryl group of 6 to 12 carbon atoms, and (ii) methoxy, ethoxy, 2-methoxyethoxy and/or propoxy groups, and (iii) if desired, alkyl, alkenyl, isoalkyl or cycloalkyl groups of 1 to 18 carbon atoms and/or aryl groups of 6 to 12 carbon atoms, and where not more than one aminopropyl-functional group is attached to one silicon atom and the degree of oligomerization of compounds of the formula I is within the range 2
摘要:
The residual halogen content in alkoxysilanes and in alkoxysilane-based compositions is reduced by a process comprising, treating the alkoxysilane or the alkoxysilane-based composition with activated carbon.
摘要:
The invention relates to a process for preparing crosslinkable polymers containing silane groups having at least one hydrolyzable radical by free-radical-initiated grafting of the base polymers with an olefinically unsaturated silane having at least one hydrolyzable radical, wherein the grafting is carried out in the presence of (a) an alkylsilane of the formula I, R1(SiR2nX3−n)m, (I) where R1 is a monovalent hydrocarbon radical having from 1 to 33 carbon atoms or a divalent hydrocarbon radical having from 4 to 24 carbon atoms, R2 is a hydrocarbon radical having from 1 to 10 carbon atoms, X are identical or different hydrolyzable radicals, n is 0, 1 or 2 and m is 1 or 2 and/or (b) a fluoroalkylsilane of the formula R3xSiR4yXz, (II) where R3 is a fluoroalkyl radical, R4 is an alkyl radical and X is a hydrolyzable radical, x is an integer from 1 to 3, y is 0, 1 or 2 and z is an integer from 1 to 3, with the proviso that the sum x+y+z=4.
摘要翻译:本发明涉及制备具有至少一个可水解基团的可交联聚合物的交联聚合物的方法,所述硅烷基团具有至少一个可水解基团的烯属不饱和硅烷通过自由基引发接枝基础聚合物,其中接枝在 存在(a)式I的烷基硅烷,其中R 1是具有1至33个碳原子的一价烃基或具有4至24个碳原子的二价烃基,R 2是具有1至10个碳原子的烃基 X为相同或不同的可水解基团,n为0,1或2,m为1或2,和/或(b)下式的氟代烷基硅烷,其中R 3为氟代烷基,R 4为烷基,X为可水解基团,x为 是1至3的整数,y是0,1或2,z是1至3的整数,条件是和x + y + z = 4。
摘要:
An aqueous organopolysiloxane-containing composition comprising organopolysiloxanes of formula I: HO [Si(A)(CH3)z(OH)1−zO]a[Si(B)(R2)y(OH)1−yO]b[Si(C)(CH3)O]c[Si(D)(OH)O]dH.(HX)e (I), wherein A is an aminoalkyl group of formula II: H2N (CH2)f(NH)g(CH2)hSi(OR)3−z(CH3)z (II), in which 0≦f≦6, g=0 if f=0 and g=1 if f>0, 0≦h≦6 and 0≦z≦1; B is a fluoroalkyl group of formula III: R1—Y—(CH2)2Si(R2)Y(OR)3−y (III) wherein R1 is a mono-, oligo- or perfluorinated alkyl group having 1-9 C atoms, or a mono-, oligo- or perfluorinated aryl group, Y is a CH2, O or S group, R2 is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group and 0≦y≦1; C is an alkyl group of formula IV: R3—Si(CH3)(OR)2 (IV), and D is an alkyl group of formula V: R3—Si(OR)3 (V) wherein R3, in each case is identical or different, and is a linear, branched or cyclic alkyl group having 1-8 C atoms, and R, in each case is identical or different, and is a linear, branched or cyclic alkyl group having 1-8 C atoms or an aryl group; and HX is an acid, in which X is an inorganic or organic acid radical, and 0≦y≦1, 0≦z≦1, a>0, b>0, c≧0, d≧0, e≧0 and (a+b+c+d)≧2, the composition being essentially free from organic solvents, having a flash point of more than 70° C. and liberating essentially no alcohols by hydrolysis on dilution with water.
摘要翻译:含有机聚硅氧烷的组合物包含式I的有机聚硅氧烷:其中A是式II的氨基烷基:其中0≤f≤6,如果f = 0,则g = 0,如果f> 0,则g = = h <= 6且0 <= z <= 1; B是式III的氟烷基:其中R1是具有1-9个C原子的单,低聚或全氟化烷基,或单 - 或全氟化芳基,Y为CH 2,O或S基团,R 2为具有1-8个碳原子或芳基且0 <= y <1的直链,支链或环状烷基; C为 式Ⅳ:和D是式Ⅴ的烷基:其中R 3在每种情况下是相同或不同的,并且是具有1-8个C原子的直链,支链或环状的烷基,R在每种情况下是相同的或 不同的是具有1-8个碳原子或芳基的直链,支链或环状的烷基; HX是酸,其中X是无机或有机酸基,0 <= y <= 1,0 <= z <= 1,a> 0,b> 0,c> = 0,d> = 0,e> = 0,(a + b + c + d)> = 2, 有机溶剂,闪点高于70℃,在用水稀释时通过水解基本上不释放醇。
摘要:
A reinforced molding material having high tensile strength comprising: (a) from 0 to 98 parts by weight of one or more thermoplastics, (b) from 2 to 100 parts by weight of a substantially amorphous polyolefin which has been subjected to free radical grafting with a silane which has at least one olefinic double bond and one to three alkoxy groups bonded directly to the silicon, this grafted polyolefin having a melt viscosity at 190° C. In the range from 100 to 50,000 maps and the parts by weight of (a) and (b) sunning to 100, and (c) from 0.5 to 400 parts by weight of a reinforcing material. The molding material can be used, inter alia, for shaped articles, as hotmelt adhesives or for heavy-duty carpet backing materials.
摘要:
A mixture of oligomers of alkylalkoxysilanes condensed in the chain and/or cyclic form, said mixture of oligomers containing less than 2% by weight of free alcohols and the condensed alkoxysilanes satisfying formula I: ##STR1## wherein R is an alkyl group having 3 to 18 carbon atoms, and each R' is a member (i) selected from the group consisting of methyl, ethyl or hydrogen, or is (ii) methyl or hydrogen, or is (iii) ethyl or hydrogen, the degree of oligomerization being in the range 2.ltoreq.x.ltoreq.20 and the quotient of the molar ratio �Si/alkoxy group!.gtoreq.1; and/orsatisfying formula II: ##STR2## in which R is an alkyl group having 3 to 18 carbon atoms, and each R' is a member (i) selected from the group consisting of methyl, ethyl or hydrogen, or is (ii) methyl or hydrogen or is (iii) ethyl or hydrogen, the degree of oligomerization being x.gtoreq.3 and the quotient of the molar ratio �Si/alkoxy group!.gtoreq.1.
摘要:
A composition comprising at least one organofluorine-functional silane and/or siloxane, at least one mineral acid and at least one metal salt of aluminum(III), tin(II), tin(IV), iron(III) or titanium(III); a process for preparing said composition and to its use; and surface-modified substrates obtainable by coating with said composition.
摘要:
The present invention relates to a stable composition of water-soluble organosiloxanes obtained by reacting a) a water-soluble amino-functional alkoxysilane with at least one water-insoluble alkenyl-functional alkoxysilane b) by adding water to form a mixture, and c) removing the alcohol formed during step b) from the mixture, where the amino-functional alkoxysilane and the water are used in the reaction at least in amounts such that substantially all of the alkoxy groups of the water-insoluble silane can react and such that when a resulting composition is diluted with water, essentially no alcohol is liberated by hydrolysis, and the composition, during an/or after the reaction, has a pH of from 2 to 6, the pH being preferably adjusted by adding an organic or inorganic, optionally aqueous, acid. In addition, the present invention discloses a process for the preparation of such a composition and also its use.
摘要:
An oligomerized polyorganosiloxane cocondensate which may be obtained, in part, by mixing an water-soluble amino-functional organosilane represented with at least one of the followoing: a fluoro-functional organosilane, an organosilane, and an organosilane. The cocondensate may be used, for example, in a method of treating surfaces.
摘要:
The present invention relates to a process for the preparation of alkoxysilanes in which at least one halogenosilane is reacted with at least one alcohol in the presence of metallic magnesium and the alkoxysilane is isolated from the crude product.