Abstract:
This invention is directed to stabilizing additives that contain at least one platinum complex, with the complex including a carbene group. The stabilizing additives make it possible to improve the resistance to decomposition of silicone elastomers under high temperatures. The additive can be used in a polyorganosiloxane composition intended for the production of a silicone elastomer with either crosslinks at high temperature under the action of organic peroxides or crosslinks at ambient temperature or with heat by polyaddition reactions in the presence of a metal catalyst.
Abstract:
Elastomer isoprene rubber compositions contain an effective amount of a polyfunctional coupling system (A) as an inorganic-elastomer filler coupling agent, and (B) at least one elastomer of natural or synthetic rubber; (C) an inorganic filler as reinforcing filler; (D) other conventional constituents or additives comprising one or more vulcanizing agent(s), the polyfunctional coupling system being of the constituents (A1) and (A2): (A1) is at least one coupling agent selected from among the functionalized organosilicon compounds of formula (I): [(G0)3SiO1/2]m[(G0)2SiO2/2]n[G0SiO3/2]o[SiO4/2]p[(G2)a(G1)a′(Z—CO—N═N—CO-A)SiO(3-a-a′)/2]q and (A2) is at least one coupling agent selected among polysulfurated “symmetric” silanes, or sulfurated “asymmetric” silanes.
Abstract translation:弹性体异戊二烯橡胶组合物含有有效量的作为无机 - 弹性体填料偶联剂的多官能偶联体系(A),和(B)至少一种天然或合成橡胶弹性体; (C)作为增强填料的无机填料; (D)包含一种或多种硫化剂的其它常规组分或添加剂,作为组分(A1)和(A2)的多官能偶联体系:(A1)是至少一种选自官能化的有机硅化合物 式(I):[(G0)3SiO1 / 2] m [(G0)2SiO2 / 2] n [G0SiO3 / 2] o [SiO4 / 2] p [(G2)a(G1) -N = N-CO-A)SiO(3-a-a')/ 2] q和(A2)是选自多硫“对称”硅烷或硫化“不对称”硅烷中的至少一种偶联剂。
Abstract:
The invention concerns synthesis of functionalized organosilicium compounds comprising at least one activated azo group of formula (I): [(G0)3SiO1/2]m[(G0)2SiO2/2]n[G0SiO3/2]o[SiO4/2]p[(G2)a(G1)a′(Z-CO—HN═NH—CO-A)SiO(3-a-a′)/2]. Said compounds can for example be a mixture of silane species of formula (ia): (C2H5O)3Si—(CH2)3—NH—CO—N═N—COOC2H3; with siloxane species of formulae: (2i.1a): [(CH3)3SiO1/2][(C2H5O)2{(CH2)3—NH—CO—N═N—COOC2H5}SiO1/2] et (2i.2a): [(CH3)3SiO1/2]2[(C2H5O){(CH2)3—NH—CO—N═N—COOC2H5}SiO2/2]. The invention also concerns the method for preparing said compounds (I), which consists in using at least one hydrazino precursor (II) (—HN—NH—) of compound (I), oxidizing the precursor (II) into an azo group for the compound (I) using at least one oxidizing agent (Ox) and at least one vase (B), said method consisting in selecting the base B among mineral bases and Ox among halogens, cyanurated compounds and chlorinated compounds and mixtures thereof, and in using a supplementary reagent selected among silanes (alone or mixed together) of formula (III): (Go)4-p1Si(G2′)p1 [or example, (CH3)3(C2H5O)Si].
Abstract translation:本发明涉及包含至少一种式(I)活化偶氮基团的官能化有机硅化合物的合成:[(G0)3SiO1 / 2] m [(G0)2SiO2 / 2] n [G0SiO3 / 2] o [SiO4 / p [(G2)a(G1)a'(Z-CO-HN-NH-CO-A)SiO(3-a-a')/ 2]。 所述化合物可以例如是式(ia):(C 2 H 5 O)3 Si-(CH 2)3 -NH-CO-N-N-COOC 2 H 3的硅烷物质的混合物; 具有式(2i.1a):[(CH 3)3 SiO 1/2] [(C 2 H 5 O)2 {(CH 2)3 -NH-CO-NN-COOC 2 H 5] SiO 1/2/2] [(CH3)3SiO1 / 2] 2 [(C2H5O){(CH2)3-NH-CO-NN-COOC2H5} SiO2 / 2]。 本发明还涉及制备所述化合物(I)的方法,其包括使用化合物(I)的至少一种肼基前体(II)(-HN-NH-),将前体(II)氧化成偶氮基团 使用至少一种氧化剂(Ox)和至少一个花瓶(B)的化合物(I),所述方法包括在卤素,氰化合物和氯化化合物及其混合物中选择矿物碱中的碱B和Ox,并且 使用选自式(III):(Go)4-p1Si(G2')p1 [或实例,(CH3)3(C2H5O)Si]的硅烷(单独或混合在一起)的补充试剂。
Abstract:
The synthesis of purified functionalized organosilicon compounds containing at least one active azo group having formula (I): [(G0)3SiO1/2]m [(G0)2SiO2/2]n[G0SiO3/2]o[SiO4/2]p[(G2)a(G1)a′(Z-CO—HN═NH—CO-A)SiO(3-a-a′)/2] entails providing at least one hydrazino (—HN—NH—) precursor (II) of the compound (I) and oxidizing the precursor (II) into an azo group specific to the compound (I) with the aid of an oxidizing system comprising at least one oxidant (Ox) and at least one base (B), wherein 1) Ox is selected from among the oxidants that can oxidize a hydrazine function into an azo function, with or without the exclusion of N-bromosuccinimide (NBS), 2) and/or Ox (optionally B) is/are employed in stoichiometric quantities in relation to the precursor (II); 3) and/or the organosilicon compounds (I) thus prepared are subjected to a purification post-treatment to eliminate any unwanted residues of the base B used, with the proviso that, when NBS is not excluded, characteristic (1) is combined with characteristic (2) and/or characteristic (3).
Abstract translation:含有至少一种具有式(I)的活性偶氮基的纯化官能化有机硅化合物的合成:[(G0)3SiO1 / 2] m [(G0)2SiO2 / 2] n [G0SiO3 / 2] o [SiO4 / 2] [(G2)a(G1)a'(Z-CO-HN-NH-CO-A)SiO(3-a-a')/ 2]需要提供至少一种肼基(-HN-NH-)前体 II),并且借助于包含至少一种氧化剂(Ox)和至少一种碱(B)的氧化体系将前体(II)氧化成化合物(I)特异性的偶氮基团, 其中1)Ox选自可以将肼功能氧化成偶氮功能的氧化剂,其中或不排除N-溴代琥珀酰亚胺(NBS),2)和/或Ox(任选地B)以化学计量 与前体(II)有关的数量; 3)和/或这样制备的有机硅化合物(I)进行纯化后处理以消除所使用的碱B的任何不想要的残留物,条件是当不排除NBS时,将特征(1)与 特征(2)和/或特征(3)。
Abstract:
Tyre and rubber composition for tyre or tyre semi-finished product, based on at least one isoprene elastomer (for example natural rubber), an inorganic filler as reinforcing filler (for example silica) and a coupling system which provides the bonding between the said reinforcing inorganic filler and the isoprene elastomer, the said coupling system comprising, in combination: a monofunctional covering agent (for example a polyorganosiloxane oil) capable of bonding to the surface functional sites of the inorganic filler; and as coupling agent, an at least bifunctional organosilicon compound (for example an organosilane or an organosiloxane) which can be grafted to the elastomer by means of an azodicarbonyl functional group (—CO—N═N—CO—).
Abstract:
The invention relates to a silicone composition which can be crosslinked by dehydrogenative condensation between reactive ≡SiH and ≡SiOH units and which employs a catalytic iridium complex capable of being obtained by reacting together: on the one hand, an iridium complex of formula (I): (IrΣΣ′2)n in which: A/ n is 1 or 2 and: if n is 1, Σ is a 3-electron radical ligand LX, if n is 2, Σ is a 1-electron radical ligand X which behaves like a 3-electron ligand LX with the two iridium atoms, B/ Σ′, which are identical or different, preferably identical, each represent a 2-electron ligand L, on the other hand, a ligand Σd chosen from R2S, R2O, NR3, carbenes and organophosphorus compounds.
Abstract:
Tyre and rubber composition for tyre, based on at least one isoprene elastomer (for example natural rubber), an inorganic filler as reinforcing filler (for example silica) and a coupling system which provides the bonding between the said reinforcing inorganic filler and the isoprene elastomer, the said coupling system comprising, in combination: as first coupling agent, a silane sulphide compound; as second coupling agent, an at least bifunctional organosilicon compound (for example an organosilane or an organosiloxane) which can be grafted to the elastomer by means of an azodicarbonyl functional group (—CO—N═N—CO—).
Abstract:
Functionalized organosilicon compounds comprising at least one activated azo group of formula (I): [(G0)3SiO1/2]m [(G0)2SiO2/2]n [G0SiO3/2]o [SiO4/2]p [(G2)a(G1)a′(Z-CO—HN═NH—CO-A)SiO(3-a-a′)/2], for example a mixture of silane species of formula (ia): (C2H5O)3Si—(CH2)3—NH—CO—N═N—COOC2H3; with siloxane species of formulae: (2i.1a): [(CH3)3SiO1/2] [(C2H5O)2 {(CH2)3—NH—CO—N═N—COOC2H5} SiO2/2] and (2i.2a): [(CH3)3SiO1/2]2 [(C2H5O) {(CH2)3—NH—CO—N═N—COOC2H5} SiO2/2], are prepared from at least one hydrazino precursor (II) (—HN—NH—) of compound (I), by oxidizing the precursor (II) into an azo group for the compound (I) utilizing at least one oxidizing agent (Ox) and at least one vase (B) and also a supplementary reagent selected from among silanes of formula (III): (G DEG)4-p1Si (G2′)p1 [for example, (CH3)3(C2HSO)Si].
Abstract translation:包含至少一种式(I)活化偶氮基团的官能化有机硅化合物:[(G0)3SiO1 / 2] m [(G0)2SiO2 / 2] n [G0SiO3 / 2] o [SiO4 / 2] p [(G2) a(G1)a'(Z-CO-HN = NH-CO-A)SiO(3-aa')/ 2],例如式(ia)的硅烷种类的混合物:(C 2 H 5 O)3 Si-(CH 2 )3-NH-CO-N = N-COOC2H3; 具有式(2i.1a):[(CH 3)3 SiO 1/2/2] [(C 2 H 5 O)2 {(CH 2)3 -NH-CO-N = N-COOC 2 H 5] SiO 2/2]和(2i) ):由至少一种肼前体(II)(-HN)制备[(CH 3)3 SiO 1/2/2] 2 [(C 2 H 5 O){(CH 2)3 -NH-CO-N = N-COOC 2 H 5] SiO 2/2 -NH-)化合物(I)的化合物,通过使用至少一种氧化剂(Ox)和至少一种花瓶(B)将所述前体(II)氧化为化合物(I)的偶氮基, 式(III)的硅烷:(G DEG)4-p1Si(G2')p1 [例如(CH3)3(C2HSO)Si]。
Abstract:
Thermally stable functionalized organosilicon compounds containing at least one activated azo group, of formula (I): [(G0)3SiO1/2]m[(G0)2SiO2/2]n[G0SiO3/2]o[SiO4/2]p[(G2)a(G1)a′(Z-CO—HN═NH—CO-A)SiO(3-a-a′)/2] are synthesized from at least one hydrazino precursor (II) (—HN—NH—) of the compound (I), oxidizing the precursor (II) into an azo group for the compound (I), employing an oxidizing system including at least one oxidizing agent (Ox) and at least one base (B), such oxidizing being carried out in a two-phase aqueous/organic medium and such that the pH of the aqueous phase ranges from 3 to 11.
Abstract translation:含有式(I)至少一种活化偶氮基的热稳定性官能化有机硅化合物:[(G0)3SiO1 / 2] m [(G0)2SiO2 / 2] n [G0SiO3 / 2] o [SiO4 / (II)(-HN-NH)的合成(G2)a(G1)a'(Z-CO-HN-NH-CO-A)SiO(3-a-a')/ 2] - )化合物(I),使用包含至少一种氧化剂(Ox)和至少一种碱(B)的氧化体系将前体(II)氧化成化合物(I)的偶氮基,这种氧化 在两相水/有机介质中进行,使得水相的pH为3至11。
Abstract:
Process for preparing catalyst assemblies by mixing a metal catalyst capable of catalyzing a hydrosilylation reaction and an organophosphorus inhibitor of the formula (I) or of formula (VIII) P(OR)3, either by mixing the inhibitor into a solution of catalyst in an unsaturated silane or siloxane or by mixing the inhibitor into a gum or oil at a temperature greater than the melting temperature or softening temperature of the organophosphorus compound, then mixing the catalyst. Catalyst assemblies, process for preparing one-component silicone compositions, and resultant compositions.