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    • 1. 发明授权
    • Method of dispersing silicone compositions in organic thermoplastic
materials
    • 将有机硅组合物分散在有机热塑性材料中的方法
    • US5844031A
    • 1998-12-01
    • US704061
    • 1996-08-28
    • Wei ChenHongxi ZhangKevin Edward LuptonDavid Joseph RomeneskoRandall Gene Schmidt
    • Wei ChenHongxi ZhangKevin Edward LuptonDavid Joseph RomeneskoRandall Gene Schmidt
    • C08J3/07C08L23/00C08L83/04C08L101/00C08K5/24
    • C08L83/04C08G77/12C08G77/14C08G77/16C08G77/18C08G77/20C08G77/26C08G77/46C08G77/70C08G77/80
    • A method of dispersing silicone compositions in organic thermoplastic materials is disclosed. The novel compositions produced by the method of the invention have a fine and relatively uniform dispersion or organosilicone in an organic thermoplastic. An organosilicone resin (A) and a predominantly linear silicone fluid (B) are first blended to substantial homogeneity to form an organosilicone alloy therefrom. The organosilicone alloy exhibits thermoplastic behavior and has a temperature-dependent complex viscosity .eta.*.sub.Si (T) associated therewith. Likewise the organic thermoplastic materials have a temperature-dependent complex viscosity, .eta.*.sub.OTP (T), associated therewith. The organic thermoplastic and the organosilicone alloy are thereafter mixed at a predetermined mixing temperature, T.sub.m, and a predetermined shear strain rate. The organic thermoplastic material and the organosilicone alloy are both in a flowable state at T.sub.m. The value of T.sub.m is selected to be about .+-.30.degree. C. of a temperature, T.sub.0, wherein the absolute value of {72*.sub.OTP (T.sub.0)-.eta.*.sub.Si (T.sub.0)} is at its lowest value, at the predetermined shear strain rate.
    • 公开了将有机硅组合物分散在有机热塑性材料中的方法。 通过本发明的方法生产的新型组合物在有机热塑性塑料中具有精细且相对均匀的分散体或有机硅氧烷。 首先将有机硅氧烷树脂(A)和主要为线性的硅氧烷流体(B)进行共混,从而形成有机硅氧烷合金。 有机硅合金表现出热塑性,并具有与之相关的温度依赖性复数粘度ηa(T)。 类似地,有机热塑性材料具有与之相关的温度依赖性复合物粘度eta * OTP(T)。 然后将有机热塑性塑料和有机硅合金以预定的混合温度Tm和预定的剪切应变速率混合。 有机热塑性材料和有机硅合金在Tm处于可流动状态。 选择Tm的值为约+/- 30℃的温度T0,其中{72 * OTP(T0) - eta * Si(T0)}的绝对值处于其最低值,在 预定的剪切应变速率。
    • 2. 发明授权
    • Organic polymers modified with thermoplastic silicone blends
    • 用热塑性硅酮共混物改性的有机聚合物
    • US5861450A
    • 1999-01-19
    • US705105
    • 1996-08-28
    • Wei ChenKevin Edward LuptonDavid Joseph RomeneskoRandall Gene SchmidtHongxi Zhang
    • Wei ChenKevin Edward LuptonDavid Joseph RomeneskoRandall Gene SchmidtHongxi Zhang
    • C08L23/00C08L23/02C08L33/06C08L39/02C08L67/02C08L75/04C08L77/00C08L83/04C08L101/00C08K5/24
    • C08L23/02C08L101/00C08L23/06C08L77/00
    • An additive to improve the hydrophobicity of a thermoplastic resin wherein the additive is at least 0.3 parts by weight of a thermoplastic silicone blend, said thermoplastic silicone blend having:(A) an organosilicone resin of the empirical formula(R.sub.3 Sio.sub.1/2)a (R.sub.2 SiO.sub.2/2)b (RSiO.sub.3/2)c( SiO.sub.4/2)dwherein: a and d are positive numerical values and b and c are zero or positive numerical values with the provisos that a+b+c+d=1, 0.ltoreq.(b+c).ltoreq.0.2 and the ratio of a:(b+c+d) is between about 0.3 and 1.0; and R is a monovalent radical independently selected from the group consisting of hydrogen, hydroxyl, alkyl, alkenyl, alkoxy, oximo, aryl, epoxide, carboxyl, ether, polyether, amide and alkyl amino radicals, which R groups may be the same or different, with the proviso that at least sixty mole percent of said R radicals are methyl; and(B) a predominantly linear silicone fluid having the empirical formula(R'.sub.3 SiO.sub.1/2)x (R'.sub.2 SiO.sub.2/2)y (R'SiO.sub.3/2)zwherein: x and y are positive numerical values and z is 0 or a positive numerical value with the provisos that x+y+z=1, y/(x+y+z).gtoreq.0.8; and R' is a monovalent radical independently selected from the group consisting of hydroxyl and alkyl radicals, which R' groups may be the same or different, with the proviso that at least sixty mole percent of said R' radicals are methyl;said organosilicone resin (A) and said predominantly linear silicone fluid (B) being present in relative amounts such that said blends have a dynamic shear modulus (G*), measured at a frequency of 10 radians/sec, of at least 5.times.10.sup.7 dyne/cm.sup.2 at temperatures less than said predetermined maximum storage temperature.
    • 一种用于改善热塑性树脂的疏水性的添加剂,其中所述添加剂为至少0.3重量份的热塑性硅氧烷共混物,所述热塑性硅氧烷共混物具有:(A)经验式(R3Si1 / 2)a的有机硅氧烷树脂(R2SiO2 / 2)b(RSiO3 / 2)c(SiO4 / 2)d其中a和d为正数值,b和c为零或正数值,条件是a + b + c + d = /=(b+c) = 0.8; 并且R'是独立地选自羟基和烷基的一价基团,R'基团可以相同或不同,条件是至少60摩尔%的所述R'基团是甲基; 所述有机硅氧烷树脂(A)和所述主要线性硅氧烷流体(B)以相对的量存在,使得所述共混物的动态剪切模量(G *)以10弧度/秒的频率测量为至少5×10 7达因/ cm2,在低于所述预定最大存储温度的温度下。