摘要:
The use of a functionalized organosilicon compound as a coupling agent between an inorganic filler and an elastomer in an elastomer composition including an isoprene elastomer and a reinforcing inorganic filler is disclosed. The compound is selected among functionalized organosilicon compounds including at least one double bond C═C or C═N, and not including any C═C—C═O bonds or N═N bonds, and reacting with the isoprene units according to an electrocyclic reaction, in particular according to a standard cycloaddition reaction [2+1], [2+2], [3+2] or a Diels-Alder reaction [4+2] or an ene-synthesis reaction other than an ene-synthesis reaction between an isoprene unit and a C═C—C═O or N═N function. Also described, are elastomer composition(s) obtained and items manufactured using such compositions.
摘要:
In an elastomer composition, which preferably comprises an isoprene elastomer, use of an inorganic filler with a compound having the following formula (I), and which is optionally, in all or part, in a polymerized form: wherein R is R6 or OR8; wherein R1, R2, R3, R4, R5, and R6, independently from each other, are chosen from: hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, heterocycloalkyl, and alkenyl groups; and wherein R7 and R8, independently from each other, are chosen from: hydrogen, alkyl, aryl, alkaryl, aralkyl, cycloalkyl, alkenyl groups, and metals selected from the group consisting of Na, Li, and Ca.
摘要:
A method for preparing precipitated silicas is described. A precipitation reaction between a silicate and an acidifying agent is also described, wherein a precipitated silica suspension is produced, and, subsequently, separation and drying of the suspension is conducted, in which, inter alia, one of the following three operations (a, b or c) is performed: (a) simultaneously adding a compound of aluminium and a basic agent, (b) simultaneously adding a silicate and a compound of aluminium, (c) simultaneously adding the acidifying agent, a silicate and a compound of aluminium.
摘要:
Elastomeric isoprene rubber compositions contain an effective amount of a coupling agent (A) comprising an organosilicon compound with coupling agent functions for inorganic/elastomeric fillers and include (B) at least one natural or synthetic rubber elastomer, (C) an inorganic filler as reinforcement filler, (D) other conventional constituents or additives comprising vulcanization agents; the coupling agent (A) being a functionalized organosilicon compound, including the following two compounds (i) and (2i), (i) being at least one functionalized siloxane corresponding to the 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 (2i) being a mixture of at least one functionalized siloxane (i) with (3i) at least one functionalized organosilane also corresponding to formula (I) where m=n=o=p=0 (zero), q=1, a=0, 1, 2 or 3 and the sum a+a′=3.
摘要翻译:弹性异戊二烯橡胶组合物包含有效量的偶联剂(A),其包含具有偶合剂功能的有机硅化合物,用于无机/弹性体填料,并且包括(B)至少一种天然或合成橡胶弹性体,(C)无机填料作为增强剂 填料,(D)其它常规组分或包含硫化剂的添加剂; 偶联剂(A)是官能化的有机硅化合物,包括以下两种化合物(i)和(2i),(i)是至少一种对应于式(I)的官能化硅氧烷:[(G0)3SiO1 / 2] m [(G0)2SiO2 / 2] n [G0SiO3 / 2] o [SiO4 / 2] p [(G2)a(G1)a'(Z-CONN-CO-A)SiO(3-a-a' )/ 2] q和(2i)是至少一种官能化硅氧烷(i)与(3i)至少一种也对应于式(I)的官能化有机硅烷的混合物,其中m = n = o = p = 0(零) ,q = 1,a = 0,1,2或3,和a + a'= 3。
摘要:
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.
摘要翻译: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。
摘要:
This invention relates to the modification of elastomers especially epoxidised rubber by reaction with unsaturated silanes, to the modified elastomers produced and to articles produced by shaping and curing modified elastomer compositions. In a process according to the present invention, the silane has the formula: R″—CH═CH—C(O)X—Y—SiRaR′(3-a) (I) or R″—C≡C—C(O)X—Y—SiRaR′(3-a) (II) in which R, R′, a, Y, X and R″ are as defined in the description.
摘要:
Elastomeric isoprene rubber compositions contain an effective amount of a coupling system (A) as an inorganic filler/elastomer coupling agent, and (B) at least one natural or synthetic rubber elastomer, (C) an inorganic filler as reinforcing filler, (D) other conventional constituents or additives comprising (a) vulcanization agent(s), the coupling system (A) being a particular mixture of the following combination of constituents (A1) and (A2): (A1) is at least one coupling agent selected from among the following 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]g and (A2) is at least one coating agent for the reinforcing filler including one compound with the single function Y in the structure thereof which is capable of bonding physically and chemically to the inorganic filler and resulting in an increase in dispersion of the charge within the rubber matrix and a reduction in viscosity of the composition.
摘要翻译:弹性异戊二烯橡胶组合物含有有效量的作为无机填料/弹性体偶联剂的偶联体系(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) 其它常规成分或添加剂包括(a)硫化剂,偶联体系(A)是组分(A1)和(A2)的以下组合的特定混合物:(A1)是至少一种选自 在以下式(I)的官能化有机硅化合物中:[(G0)3SiO1 / 2] m [(G0)2SiO2 / 2] n [G0SiO3 / 2] o [SiO4 / 2] p [(G2) a'(Z-CO-N = N-CO-A)SiO(3-a-a')/ 2] g和(A2)是至少一种用于增强填料的涂料,其包括一种单一官能化合物Y 在其结构中能够物理和化学地与无机填料结合,并导致电荷在橡胶基质内的分散性增加,并且粘度降低 组成。
摘要:
1. Roll paper feed device (1) for a printing machine (2), comprising a cradle (3) provided with side cheeks (4), means (5, 7) at the bottom of the cradle for supporting a freely rotating paper roll (6) whenever the free end of the paper web (10) is subjected to a traction (9), braking means (13) for the rotating roll (6), which are joined to the cradle and have at least one elastic bearing member (14) against a side of the roll, which member comprises at least one elastically deformable arm (19) joined to the cradle and a protruding zone (16) situated at the free end of the arm and engaged through an opening (17) in the cheek and protruding relative to the inner face of the latter; the protruding zone is in the form of a protruding stub having a flat bearing surface (18) peripherally surrounded by an inclined surface (24, 25) suitable for sliding over the sides of the roll when this is introduced in the cradle.
摘要:
The use of a functionalized organosilicon compound as a coupling agent between an inorganic filler and an elastomer in an elastomer composition including an isoprene elastomer and a reinforcing inorganic filler is disclosed. The compound is selected among functionalized organosilicon compounds including at least one double bond C═C or C═N, and not including any C═C—C═O bonds or N═N bonds, and reacting with the isoprene units according to an electrocyclic reaction, in particular according to a standard cycloaddition reaction [2+1], [2+2], [3+2] or a Diels-Alder reaction [4+2] or an ene-synthesis reaction other than an ene-synthesis reaction between an isoprene unit and a C═C—C═O or N═N function. Also described, are elastomer composition(s) obtained and items manufactured using such compositions.
摘要:
The invention relates to the use of an effective amount of a coupling system (A) as an inorganic filler/elastomer coupling agent in rubber compositions comprising: (B) at least one natural or synthetic rubber elastomer, (C) an inorganic filler as reinforcing filler, (D) all or part of the other constituents or additives normally used particularly comprising (a) vulcanisation agent(s) the use being characterised in that: the coupling system (A) is a particular mixture of the following combination of ingredients (A1) and (A2): (A1) is at least one coupling agent selected from the following functionalised 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]g where the symbols Z, A, G0, G1, G2, a, a′, m, n, o, p and q have the definitions given in claim 1, (A2) is at least one coating agent for the reinforcing filler comprising one compound with the single function Y in the structure thereof which is capable of bonding physically and chemically to inorganic filler and whereby, as a result of an increase in dispersion of the charge within the rubber matrix and a reduction in viscosity of the compositions, the use of raw compositions is made easier. Said coupling system (A) is incorporated in rubber compositors made from isoprene elastomers.
摘要翻译:本发明涉及在橡胶组合物中使用有效量的偶联体系(A)作为无机填料/弹性体偶联剂,其包含:(B)至少一种天然或合成橡胶弹性体,(C)无机填料作为增强剂 填料,(D)通常使用的全部或部分其它成分或添加剂,特别包括(a)硫化剂,其用途的特征在于:偶联体系(A)是下列成分组合的特定混合物 A1)和(A2):(A1)是选自以下官能化的式(I)有机硅化合物中的至少一种偶联剂:[(G0)3SiO1 / 2] m [(G0)2SiO2 / 2] n [G0SiO3 / 2] o [SiO4 / 2] p [(G2)a(G1)a(Z-CO-NN-CO-A)SiO(3-a-a')/ 2] g其中符号Z,A,G0 ,G1,G2,a,a',m,n,o,p和q具有权利要求1中给出的定义,(A2)是至少一种用于增强填料的涂层剂,其包括在 其结构能够发光 与无机填料物理和化学结合,由此,由于电荷在橡胶基体内分散的增加和组合物的粘度降低,使得原料组合物的使用变得更容易。 所述耦合系统(A)被并入由异戊二烯弹性体制成的橡胶复合材料中。