摘要:
Branched organosilicon compounds bearing aliphatic multiple bonds, prepared by reacting a branched organosilicon compound having Si-bonded hydrogen atoms with an organosiloxane or organopolysiloxane having terminal aliphatic multiple bonds and optionally equilibrating with further organopolysiloxanes are useful as antimisting additives in the high speed coating of substrates with crosslinkable silicone compositions.
摘要:
Branched organosilicon compounds bearing aliphatic multiple bonds, prepared by reacting a branched organosilicon compound having Si-bonded hydrogen atoms with an organosiloxane or organopolysiloxane having terminal aliphatic multiple bonds and optionally equilibrating with further organopolysiloxanes are useful as antimisting additives in the high speed coating of substrates with crosslinkable silicone compositions.
摘要:
Highly branched alkenyl-functional organopolysiloxane polymers are highly efficient antimisting additives for use in the preparation of silicone release coatings in high speed coating operations. The antimisting additives are miscible with the crosslinkable silicone coating components and produce storage stable compositions which can be used to provide coatings with good release properties.
摘要:
Polymer-containing compositions contain: a) a polymer (I) containing at least two functional groups selected from the group consisting of β-ketocarbonyl and β-enaminocarbonyl functions, b) a compound (II) of a metal selected from the group consisting of the transition metals and the lanthanides and main groups 1, 2, 3 and 4 with the exception of the boron and carbon.
摘要:
Highly branched alkenyl-functional organopolysiloxane polymers are highly efficient antimisting additives for use in the preparation of silicone release coatings in high speed coating operations. The antimisting additives are miscible with the crosslinkable silicone coating components and produce storage stable compositions which can be used to provide coatings with good release properties.
摘要:
Branched organosiloxane (co)polymers comprising the structural elements of the formula Y[—CnH2n—(R2SiO)m—Ap—R2Si—G]x (I) where Y is a tri- to decavalent, optionally heteroatom-containing hydrocarbon radical, R is a monovalent, optionally halogenated hydrocarbon radical, A is a radical of the formula —R2Si—R2—(R2SiO)m—, in which R2 is a divalent hydrocarbon radical, G is a monovalent radical of the formula —CfH2f−2—Z or a divalent radical of the formula —CnH2n— bonded to a further radical Y, Z is a monovalent hydrocarbon radical which is free from terminal aliphatic carbon-carbon multiple bonds, and is inert toward SiH groups in hydrosilylation reactions, x is an integer from 3 to 10, f is an integer from 2 to 12, k is 0 or 1, n is an integer from 2 to 12, m is an integer which is at least 1, and p is 0 or a positive integer, with the proviso that the branched organosiloxane (co)polymers contain on average at least one group Z.
摘要翻译:包含式(Ⅳ)的结构元素的支链有机硅氧烷(共)聚合物是三价至十价,任选含杂原子的烃基,R是一价的,任意卤代的烃基,A是式-R 2 Si-R的基团, 2 - (R 2 SiO)m - ,其中R 2是二价烃基,G是式-CfH 2 F-2-Z的一价基团或式-C n H 2n的二价基团键合到另外的基团 Y,Z是不含末端脂肪碳 - 碳多键的单价烃基,在氢化硅烷化反应中对SiH基团呈惰性,x为3至10的整数,f为2至12的整数,k为 0或1,n是2至12的整数,m是至少为1的整数,p是0或正整数,条件是支链的有机基硅氧烷(共)聚合物平均包含至少一个基团 Z.
摘要:
Crosslinkable silicone coating compositions are prepared from (1) organopolysiloxanes containing alkenyl groups and containing per molecule at least one unit O3-n/2RnSi—Y(SiRnO3-n/2)a (I), at least 2 units R1RbSiO(3-b)/2 (II), and units RcSiO(4-c)/2 (III), where R is a monovalent, SiC-bonded organic radical having 1 to 30 C atoms free from aliphatic carbon-carbon multiple bonds, R1 is an alkenyl radical having 2 to 4 C atoms, and Y is a divalent or trivalent organic radical having 1 to 30 C atoms, with the proviso that the organopolysiloxanes (1) contain units (II) in amounts wherein the concentration of alkenyl radicals R1 is less than 2 meq/g, (2) organopolysiloxanes containing Si-bonded hydrogen atoms, (3) a hydrosilylation catalyst, and (4) optionally, inhibitors. The compositions cure rapidly with few extractables and are very useful in preparing release coatings.
摘要:
The invention relates to organopolysiloxane compounds containing per-molecule at least one structural unit of general formula (I) O3-a/2RaSi—Y(SiRaO3-a/2)b, wherein R can be identical or different and represents an organic monovalent SiC-bonded group which comprises from 1 to 30 carbon atoms and can contain one or several O atoms, a is 0 or 1 and b is an integer number ranging from 1 to 11.
摘要翻译:本发明涉及含有每分子至少一个通式(I)O 3-a / 2RaSi-Y(SiRaO 3-a / 2)b的结构单元的有机聚硅氧烷化合物,其中R可以相同或不同,表示有机单价SiC 包含1至30个碳原子并且可以含有一个或几个O原子的键合基团,a是0或1,b是1至11的整数。
摘要:
Antimisting additives are used in crosslinkable silicone coating compositions for reducing aerosol formation, the antimisting additives being alkenyl-functional siloxane copolymers prepared by reacting a hydrocarbon containing at least three aliphatic double bonds, and with an organosiloxane (2) having terminal Si-bonded hydrogen atoms in the presence of a hydrosilylation catalyst (3) at a ratio of Si-bonded hydrogen to aliphatic double bonds of from 1.3 to 10, and subsequently reacting the resulting SiH-containing hydrocarbon-siloxane copolymer with an &agr;,&ohgr;-dialkenylsiloxane polymer (4) in the presence of a hydrosilylation catalyst (3) at a ratio of aliphatic double bonds to Si-bonded hydrogen of from 1.2 to 10, and optionally, in another step, equilibrating the resulting alkenyl-functional siloxane copolymers with an organopolysiloxane (5).
摘要:
An organopolysiloxane compound containing per molecule at least one structural unit of the general formula O3-a/2RaSi—Y(SiRaO3-a/2)b (I) where R can be identical or different and denotes a monovalent SiC-bonded organic radical which has 1 to 30 C atoms and may contain one or more N and/or O atoms, Y is a divalent to dodecavalent organic radical which has 1 to 30 C atoms and may contain one or more O atoms, a is 0 or 1, and b is an integer from 1 to 11.
摘要翻译:每分子含有至少一个通式O 3-a / 2RaSi-Y(SiRaO 3 -a / 2)b(I)的结构单元的有机聚硅氧烷化合物,其中R可以相同或不同,表示一价SiC键合的有机基团, 具有1至30个C原子并且可以含有一个或多个N和/或O原子,Y是具有1至30个C原子并且可以含有一个或多个O原子的二价至十价有机基团,a为0或1,以及 b为1〜11的整数。