摘要:
A solventless curable silicone release composition contains (A) a branched organopolysiloxane having a vinyl group attached to a silicon atom at an end of its molecular chain, (B) an organohydrogenpolysiloxane having at least three SiH groups in a molecule, and (C) a platinum group metal catalyst. The composition is easily applicable to a thin gage and cures into a releasable silicone coating ensuring light release at high speeds. A release sheet having the cured coating formed thereon has improved release characteristics.
摘要:
An organopolysiloxane composition comprising (1) 100 parts by weight of an organopolysiloxane having at least two unsaturated groups per molecule, (2) 0.1-30 parts by weight of a liquid organohydrogenpolysiloxane having at least two hydrogen atoms attached directly to silicon atoms (≡Si—H bonds) per molecule, (3) 0.1-6.0 parts by weight of an addition reaction control agent prepared by mixing (a) an acetylene alcohol and (b) a silylated acetylene alcohol in a (b)/(a) ratio ranging from greater than 5 to no greater than 100 on a weight basis, and (4) a catalytic amount of a platinum metal catalyst.
摘要翻译:一种有机聚硅氧烷组合物,其包含(1)100重量份的每分子具有至少两个不饱和基团的有机聚硅氧烷,(2)0.1-30重量份具有至少两个氢原子的液态有机氢聚硅氧烷,其直接与硅原子(= Si -H键),(3)0.1-6.0重量份加成反应控制剂,其通过将(a)乙炔醇和(b)甲硅烷基化乙炔醇以(b)/(a)比范围 以重量计大于5至不大于100,和(4)催化量的铂金属催化剂。
摘要:
There is provided a curable organopolysiloxane composition comprising (A) an organopolysiloxane containing, in its molecule, at least two groups represented by the general formula (1): CH.sub.2 .dbd.CH--(CH.sub.2).sub.a --(OC.sub.b H.sub.2b).sub.c --O--(1) wherein a is an integer of 1 to 8, b is an integer of 2 to 4, and c is an integer of 0 to 3; (B) an organohydrogenpolysiloxane containing, in its molecule, at least two hydrogen atoms each bonded to a silicon atom; (C) an addition-reaction retarder; and (D) a platinum family metal catalyst. The composition is fast in curing speed and superior in curing stability.
摘要翻译:提供了一种可固化的有机基聚硅氧烷组合物,其包含(A)在其分子中含有由通式(1)表示的至少两个基团的有机聚硅氧烷:有机聚硅氧烷:CH 2 = CH-(CH 2)a - (OC b H b b)c O-(1)其中 a为1〜8的整数,b为2〜4的整数,c为0〜3的整数。 (B)在其分子中含有至少两个各自键合到硅原子上的氢原子的有机氢聚硅氧烷; (C)加成反应缓凝剂; 和(D)铂族金属催化剂。 组合物的固化速度快,固化稳定性优异。
摘要:
A radiation-curable surface-releasing agent is proposed which is capable of giving surface releasability to a substrate surface by irradiation with electron beams or ultraviolet light exhibiting outstandingly low peeling resistance against peeling of pressure-sensitive adhesive tapes applied and bonded to the release-treated surface and very small migration of the releasing ingredient toward the adhesive surface. The surface-releasing agent is a composition comprising a linear diorganopolysiloxane having, only at one of the molecular chain ends, at least one (meth)acryloxy groups and a poly(meth)acrylate compound such as trimethylol propane tri(meth)acrylate, diethylene glycol di(meth)acrylate, pentaerithritol tri(meth)acrylate and the like.
摘要:
A grease composition having high thermal conductivity and excellent dispensation suitability, comprising (A) 100 parts by weight of a base oil and (B) 500 to 1,200 parts by weight of metallic aluminum powder having the average particle size in the range of 0.5-50 &mgr;m; wherein the aluminum powder is a mixture of fine metallic aluminum powder having an average size of 0.5 to 5 &mgr;m and coarse metallic aluminum powder having an average particle size of 10 to 40 &mgr;m; and a semiconductor device utilizing the aforesaid grease composition.
摘要:
Hydrogenpolysiloxanes having a (meth)acryloxypropyl group on a side chain are useful intermediates. They are prepared by equilibration reaction of siloxane compounds.
摘要:
A composite polymeric material having a high permeability to oxygen is proposed comprising a vinyl chloride moiety, an organosilicon moiety and, optionally, a third polymeric moiety. Such a composite polymeric material can be prepared in several ways including copolymerization of vinyl chloride monomer, a polymerizable organosilicon compound and, optionally, a third monomer, graft-polymerization of a polymerizable organosilicon compound on to a polyvinyl chloride resin, graft-polymerization of vinyl chloride on to an organopolysiloxane, graft-copolymerization of vinyl chloride and a polymerizable organosilicon compound on to a third polymer and blending of the respective polymeric components.
摘要:
Novel nitrogen atom-containing polysiloxanes having residual alkoxy groups are provided. Compositions comprising the same are effective for treating fibers or fibrous materials for imparting softness and durability of home laundering and preventing yellowing.
摘要:
Silicone block polymers are obtained by cohydrolysis of a both end reactive diorganopolysiloxane and a silane or a partial hydrolyzate thereof or curing a both end reactive diorganopolysiloxane and an organopolysiloxane at room temperature or elevated temperatures. They have improved flexibility, stain resistance, thermal shock resistance, and water repellency and are suitable to form hard coatings, moistureproof coatings and topcoats.
摘要:
The invention provides an efficient method for releasing a shaped body of a polymeric material such as a foamed polyurethane resin from a mold in which the body has been molded without the problem of adhesion to the mold. The inventive method comprises admixing the polymeric material with a specific organopolysiloxane represented by the structural formulaR.sup.1.sub.3 Si--O--SiR.sup.2.sub.2 --O).sub.m (SiR.sup.2 A--O).sub.n SiR.sup.1.sub.3,in which A is a substituent group represented by the general formula --C.sub.x H.sub.2x --O--R, R being a monovalent hydrocarbon group having 8 to 30 carbon atoms but free from terminal unsaturation and x being zero or a positive integer not exceeding 4, R.sup.1 is a monovalent hydrocarbon group or the same group as A, R.sup.2 is a hydrogen atom or the same group as R.sup.1, and m and n are each zero or a positive integer with the proviso that at least one group denoted by A is contained in a molecule of the organopolysiloxane.
摘要翻译:本发明提供了一种用于从模具中释放聚合物材料如发泡聚氨酯树脂的成形体的有效方法,其中已经模制了本体,而没有粘附到模具的问题。 本发明的方法包括将聚合物材料与由结构式R 13 Si-O-SiR 22 -O)m(SiR 2 A-O)n SiR 13表示的特定有机聚硅氧烷混合,其中A是由通式-C x H 2 x -OR表示的取代基, R为碳原子数为8〜30,不含末端不饱和单价烃基,x为零或不超过4的正整数,R1为单价烃基或与A相同的基团,R2为氢原子或相同 基团为R 1,m和n各自为零或正整数,条件是由A表示的至少一个基团包含在有机聚硅氧烷的分子中。