摘要:
A hydrolyzate resulting from co-hydrolysis of a perfluoroalkyl group-containing organic silicon compound and a hydrolyzable group-containing methylpolysiloxane compound in a hydrophilic solvent and water constitutes a water repellent agent which is effective for imparting water repellency and facilitating falling of water droplets and thus imparting excellent water repellency and stain-proofness to a surface of an article treated therewith.
摘要:
An additive comprising a triglycerol-modified silicone compound as an active ingredient is added to aqueous paint compositions for reducing the surface tension thereof for ensuring formation of a smooth coating free of defects.
摘要:
A highly volatile electrical/electronic parts surfactant containing a polyether-modified silicone having one polyether chain in the molecule, wherein the surface tension at 25° C. of a 0.01 mass % aqueous solution thereof is 25 mN/m or less, the aforesaid silicone is expressed by the following average structural formula (1), and when heated from room temperature to 200° C. at a rate of 5° C./minute to 200° C. and maintained at a temperature of 200° C. for 100 minutes, the polyether-modified silicone completely volatilizes without leaving any remainder, and a method of manufacturing this highly volatile polyether-modified silicone are disclosed. AMe2SiO(MeASiO)nSiMe2A (1) In formula (1), any one of A is a substituent group expressed by the following general formula (2), the remaining A are methyl groups and n is an integer from 0-2. —CaH2aO(C2H4O)bR (2) In formula (2), a is 3-4, b is an integer from 1-7 and R is a methyl group or an ethyl group.
摘要:
A process for preparing an urethane compound for medical instruments, characterized by reacting a hydroxyl compound (A) with an isocyanate compound (B) in the absence of a catalyst or in the presence of a reaction catalyst other than an organic tin compound to give an urethane compound (I). According to the process, the urethane compound showing high safety can be easily prepared, in particular, while molecular weight of the compound is controlled.
摘要:
Polysulfide silanes: (RO).sub.3 SiC.sub.3 H.sub.6 S.sub.x C.sub.3 H.sub.6 Si(OR).sub.3 are reacted with an anhydrous sulfur compound: M.sup.1.sub.2 S or M.sup.2 S and a halogenoalkoxysilane: XC.sub.3 H.sub.6 Si(OR).sub.3 to form polysulfide silanes: (RO).sub.3 SiC.sub.3 H.sub.6 S.sub.y C.sub.3 H.sub.6 Si(OR).sub.3 wherein R is methyl or ethyl, x is a positive number of 3 to 6 on the average, M.sup.1 is an alkali metal or ammonium, M.sup.2 is an alkaline earth metal or zinc, X is a halogen, and y is a positive number less than x on the average. Short chain polysulfide silanes can be prepared with the industrial advantages of safety, high yields and low cost.
摘要翻译:将多硫化硅烷:(RO)3SiC 3 H 6 S x C 3 H 6 Si(OR)3与无水硫化合物:M12S或M2S和卤代烷氧基硅烷:XC3H6Si(OR)3反应形成多硫化硅烷:(RO)3SiC 3 H 6 S 3 C 6 H 6 Si(OR)3,其中R为甲基或乙基 x是平均为3〜6的正数,M1为碱金属或铵,M2为碱土金属或锌,X为卤素,y为平均小于x的正数。 短链多硫硅烷可以安全,高产率,低成本的工业优点制备。
摘要:
A surface treating agent comprising a reaction product of (A) a fluoroalkyl group-containing alkoxysilane with (B) an amino group-containing alkoxysilane and optionally further with (C) an alkyl group-containing alkoxysilane is water soluble. The agent is diluted with water to form a solution for treating glass and other substrates to impart durable water repellency and other improved properties to the substrates.
摘要:
A soft ocular lens material prepared by copolymerizing copolymer components consisting essentially of:(A) from 5 to 70 parts by weight of a fluorine-containing (meth)acrylate;(B) from 5 to 60 parts by weight of an alkoxy-containing (meth)acrylate;(C) from 3 to 45 parts by weight of a polysiloxane macromonomer having polymerizable groups at both terminals, of the formula I: ##STR1## (D) from 3 to 40 parts by weight of a polysiloxane macromonomer having polymerizable groups bonded via one or two urethane bonds to the siloxane main chain, of the formula II: ##STR2##
摘要:
A soft ocular lens material obtained by copolymerizing polymerizable components comprising (A) a fluorine-containing (meth)acrylate having a hydroxyl group of the formula (I): ##STR1## wherein R.sup.1 is a hydrogen atom or a methyl group, R.sup.2 is a C.sub.5-15 perfluoroalkyl group, and n is 0 or 1, (B) a hydrophilic monomer, and (C) at least one monomer selected from the group consisting of silicon-containing (meth)acrylates and siloxane-containing styrene derivatives, wherein the ratio of the amount of the fluorine-containing (meth)acrylate (A) to the amount of the hydrophilic monomer (B) is from 20/80 to 70/30 by weight ratio, and the ratio of the total amount of the fluorine-containing (meth)acrylate (A) and the hydrophilic monomer (B) to the amount of the monomer (C) is from 30/70 to 90/10 by weight ratio.
摘要:
A method of manufacturing aminogroup-containing polysiloxanes of uniform quality characterized in that a cyclic organopolysiloxane represented by the following general formula: ##STR1## and an aminoalkylpolysiloxane represented by the following general formula: ##STR2## are heated together in the presence of a basic catalyst.