Process for the production of thermoplastic molding materials based on
vinyl polymers
    1.
    发明授权
    Process for the production of thermoplastic molding materials based on vinyl polymers 失效
    用于生产基于乙烯基聚合物的热塑性成型材料的方法

    公开(公告)号:US4181788A

    公开(公告)日:1980-01-01

    申请号:US908763

    申请日:1978-05-23

    摘要: A process for the production of thermoplastically processible moulding materials based on vinyl polymers of high chemical and molecular uniformity and having residual monomer contents of less than 0.1 mol % which comprises the steps of:(i) mass homogeneous phase polymerization of at least one vinyl monomer in a stirred continuously charged tank reactor to a conversion of from 25 to 60 mol %;(ii) directly concentrating the syrup consisting of residual monomers and vinyl polymer dissolved therein obtained from step (i) in a spiral tube evaporator at a temperature of from 60.degree. to 250.degree. C. and at a pressure of 100 m bar to 35 bar to obtain a solid content of vinyl polymer of from 40 to 90 mol %;(iii) directly charging the concentrate obtained from step (ii) to the inlet zone of a screw evaporator which consists of at least two sequential zones in order to effect further concentration, in which a first zone at a pressure of from 10 to 300 m bar and at a temperature of from 100.degree. to 250.degree. C. concentrates the vinyl polymer to a solid content of from 80 to 99 mol-%, and each subsequent zone at a pressure of 1 to 200 m bar and at a temperature of 150.degree. to 250.degree. C. concentrates the vinyl polymer to a solid content of at least 99.9 %; and(iv) recycling the residual monomers from step (ii) and the residual monomers from said first zone of the screw evaporator to the stirred and charged tank reactor without intermediate cleaning.

    摘要翻译: 一种生产基于乙烯基聚合物的热塑性可加工成型材料的方法,其具有高的化学和分子均匀性并且具有小于0.1摩尔%的残余单体含量,其包括以下步骤:(i)至少一种乙烯基单体的均匀相聚合 在搅拌的连续加入的釜式反应器中以25至60mol%的转化率; (ii)将由步骤(i)获得的残留单体和乙烯基聚合物组成的糖浆直接浓缩在螺旋管式蒸发器中,温度为60-250℃,压力为100巴,至35巴 以获得40至90mol%的乙烯基聚合物的固体含量; (iii)将由步骤(ii)获得的浓缩物直接装入由至少两个顺序区组成的螺杆蒸发器的入口区域,以便进一步浓缩,其中第一区域的压力为10-300μm 并且在100至250℃的温度下将乙烯基聚合物浓缩至固体含量为80至99mol%,并且每个后续区域在1至200mbar的压力和150℃的温度下 DEG至250℃,将乙烯基聚合物浓缩至至少99的固体含量。

    Apparatus for discharging high viscosity media in chemical engineering
    2.
    发明授权
    Apparatus for discharging high viscosity media in chemical engineering 失效
    化学工程中用于排放高粘度介质的设备

    公开(公告)号:US4617089A

    公开(公告)日:1986-10-14

    申请号:US713615

    申请日:1985-03-19

    摘要: The discharge apparatus comprises an at least four-shaft screw pump having engaging shafts (1,2,3,4) which rotate in opposite directions in pairs. The viscous product to be processed is caught up over a large area and removed by the screws. A double shaft screw pump is connected downstream of the actual collection zone as a pressure build-up zone. The two center screws (2, 3) of the collection zone merge equiaxially into the screw shafts (2a, 3a) of the pressure build-up zone. The collection zone and the pressure build-up zone are combined into one constructional unit. At least one screw shaft is driven. The resulting high viscosity product strands (7) are caught up by the screws in the collection zone and are moved on into the pressure build-up zone. The double shaft screw pump is used for the build up of a high operational pressure and thus provides the prerequisite for the subsequent connection of further procedural stages. The universal possibilities of use of this discharge apparatus are to be stressed in particular.

    摘要翻译: 排放装置包括至少四轴螺杆泵,其具有成对地以相反方向旋转的接合轴(1,2,3,4)。 待处理的粘性产品被夹在大面积上并用螺丝除去。 双轴螺杆泵连接在实际收集区的下游,作为压力积聚区。 收集区的两个中心螺钉(2,3)均匀地合并到增压区的螺杆轴(2a,3a)中。 收集区和压力积聚区组合成一个结构单元。 至少有一个螺丝轴被驱动。 所得到的高粘度产品股线(7)被收集区域中的螺钉卡住,并移动到压力增加区域中。 双轴螺杆泵用于建立高操作压力,因此为后续连接进一步的程序阶段提供了先决条件。 特别要强调使用该放电装置的普遍可能性。

    Hydrophilized cellulose esters, process for their preparation, their use
as biomedical materials and contact lenses produced from these
    4.
    发明授权
    Hydrophilized cellulose esters, process for their preparation, their use as biomedical materials and contact lenses produced from these 失效
    亲水性纤维素酯,其制备方法,它们作为生物医学材料和由其制备的隐形眼镜

    公开(公告)号:US4532277A

    公开(公告)日:1985-07-30

    申请号:US565589

    申请日:1983-12-27

    申请人: Frank Wingler

    发明人: Frank Wingler

    CPC分类号: C08F251/02 C08L1/10

    摘要: Contact lenses and implants for human medicine can be fabricated from a polymer blend comprising 98-80% by weight of component A and 2-20% by weight of component B wherein:component A is a cellulose ester of an aliphatic carboxylic acid with up to 40% by weight of total component A of an ethylene/vinyl acetate copolymer having 30-98% by weight, relative to ethylene/vinyl acetate, of incorporated vinyl acetate andcomponent B is a homopolymer or copolymer of water-soluble vinyl monomers and up to 10% by weight relative to the total polymer B of multifunctional crosslinker vinyl compounds.

    摘要翻译: 用于人类医学的隐形眼镜和植入物可以由包含98-80重量%的组分A和2-20重量%的组分B的聚合物共混物制成,其中:组分A是脂肪族羧酸的纤维素酯, 乙烯/乙酸乙烯酯共聚物的总组分A的40重量%,相对于乙烯/乙酸乙烯酯,含有乙酸乙烯酯和组分B的30-98重量%是水溶性乙烯基单体的均聚物或共聚物 至10重量%,相对于多官能交联剂乙烯基化合物的总聚合物B.

    Thermoplastic moulding compositions
    5.
    发明授权
    Thermoplastic moulding compositions 失效
    热塑性成型组合物

    公开(公告)号:US4205140A

    公开(公告)日:1980-05-27

    申请号:US852628

    申请日:1977-11-18

    摘要: A thermoplastic moulding composition comprising:(1.) 80 to 20 parts by wt. of a thermoplastic polycarbonate based on a dihydroxy diaryl alkane,(2.) 20 to 80 parts by wt. of a graft polymer of2.2. a monomer mixture, polymerized onto2.1. a diene rubber with a glass transition temperature below -30.degree. C., of2.2.1. 95 to 50% by wt. of styrene, methyl methacrylate or a mixture thereof; and2.2.2. 50 to 5% by wt. of acrylonitrile, methacrylonitrile or a mixture thereof, the ratio by wt. of rubber (2.1) to monomer mixture (2.2.) being in the range of from 80:20 and 10:90, and the moulding composition containing from 5 to 35% by wt. of the rubber (2.1.), and(3.) 5 to 75 parts by wt. of a copolymer which is chemically uniform in structure and which comprises:(3.1.) 93 to 50 parts by wt. of styrene, methyl methacrylate or a mixture thereof;(3.2.) 40 to 5 parts by weight of acrylonitrile, methacrylonitrile or a mixture thereof; and(3.3.) 2 to 30 parts by wt. of maleic acid anhydride.

    摘要翻译: 一种热塑性模塑组合物,其包含:(1)80〜20重量份 的基于二羟基二芳基烷烃的热塑性聚碳酸酯,(2.)20至80重量份。 的2.2的接枝聚合物。 单体混合物,聚合到2.1上。 二烯橡胶,玻璃化转变温度低于-30℃,为2.2.1。 95〜50重量% 的苯乙烯,甲基丙烯酸甲酯或其混合物; 和2.2.2。 50〜5重量% 丙烯腈,甲基丙烯腈或其混合物,重量比。 的橡胶(2.1)与单体混合物(2.2。)的摩尔比为80:20和10:90,模塑组合物含有5-35重量% 的橡胶(2.1。)和(3.)5〜75重量份。 的共聚物,其结构化学均匀,并且包括:(3.1。)93至50重量份。 的苯乙烯,甲基丙烯酸甲酯或其混合物; (3.2。)40-5份(重量)丙烯腈,甲基丙烯腈或其混合物; 和(3.3。)2〜30重量份。 的马来酸酐。

    Pulverulent binders
    6.
    发明授权
    Pulverulent binders 失效
    粉末粘合剂

    公开(公告)号:US3935138A

    公开(公告)日:1976-01-27

    申请号:US473391

    申请日:1974-05-28

    摘要: Powdered coating agent for use in the sprayed powder process comprising a mixture ofA. free hydroxyl groups containing copolymers having been reacted with an acid anhydride;B. a cross-linker such as triglycidyl isocyanurate or bis- or tris-oxazolines and optionallyC. auxiliary agents such as pigments and levelling agents.The copolymer contains polymerized units of30 to 85% by weight of styrene or derivatives thereof or methylmethacrylate or mixtures thereof;5 to 60% by weight of acrylic or methacrylic esters excepted methylmethacrylate and10 to 30% by weight of hydroxyalkylester of acrylic or methacrylic acid, said copolymer having been reacted with an aliphatic or cycloaliphatic dicarboxylic acid anhydride;4 to 20 parts by weight of the cross-linker are employed for 96 to 80 parts by weight of the acidified copolymer.

    摘要翻译: 用于喷雾粉末方法的粉末涂料,其包含含有与酸酐反应的共聚物的A.游离羟基的混合物; B.交联剂如三缩水甘油基异氰脲酸酯或双 - 或三 - 恶唑啉和任选的C.辅助剂如颜料和流平剂。

    Hydrophilic copolymers, the use thereof as biomedical materials and
contact-optical articles produced therefrom
    9.
    发明授权
    Hydrophilic copolymers, the use thereof as biomedical materials and contact-optical articles produced therefrom 失效
    亲水共聚物,其用作生物医学材料和由其制备的接触光学制品

    公开(公告)号:US4866148A

    公开(公告)日:1989-09-12

    申请号:US47684

    申请日:1987-05-07

    IPC分类号: C08F226/10 G02B1/04 G02C7/04

    CPC分类号: C08F226/10 G02B1/043

    摘要: The invention relates to new cross-linked copolymers of N-vinyl pyrrolidone, N-alkyl-N-vinyl carboxylic acid amides, methacrylates and optionally further copolymerizing monomers of a specific composition. the copolymers have a water absorption capacity of up to about 80% by weight, based on the hydrated state, and are suitable for the production of shaped articles which are in contact with living tissue in use. Examples include soft contact lenses and scleral lenses of high mechanical strength, in particular thin to very thin lenses for prolonged wear.

    摘要翻译: 本发明涉及N-乙烯基吡咯烷酮,N-烷基-N-乙烯基羧酸酰胺,甲基丙烯酸酯和任选的具有特定组成的其它共聚单体的新的交联共聚物。 基于水合状态,共聚物具有高达约80重量%的吸水能力,并且适用于生产与使用中的活组织接触的成形制品。 示例包括具有高机械强度的软性隐形眼镜和巩膜镜片,特别是长到非常薄的透镜以用于长时间的磨损。

    Process for the preparation of binary
.alpha.-methylstyrene/acrylonitrile resins by multi-stage bulk
polymerization
    10.
    发明授权
    Process for the preparation of binary .alpha.-methylstyrene/acrylonitrile resins by multi-stage bulk polymerization 失效
    通过多阶段本体聚合制备二元α-甲基苯乙烯/丙烯腈树脂的方法

    公开(公告)号:US4795780A

    公开(公告)日:1989-01-03

    申请号:US75775

    申请日:1987-07-20

    CPC分类号: C08F220/44

    摘要: Process for the preparation of thermoplastic copolymers of .alpha.-methylstyrene and acrylonitrile by continuous bulk copolymerization ofA. 30 to 50 mol % of .alpha.-methylstyrene andB. 70 to 50 mol % of acrylonitrileat temperatures from 60.degree. to 120.degree. C. with average residence times of 4 to 12 hours in the presence of initiators which supply free radicals, carried out in at least two continuously operated mixed tank reactors, characterized in that 100 molar parts of a monomer mixture ofA.sub.0. 34 to 52 mol % of .alpha.-methylstyrene andB.sub.0. 66 to 48 mol % of acrylonitrileare fed continuously into the first tank reactor per unit time, and, with back-mixing, are copolymerized up to a conversion of 5 to 30 molar parts to give a copolymer of the compositionA.sub.1. 49 to 53 mol % of .alpha.-methylstyrene andB.sub.1. 51 to 47 mol % of acrylonitrile,and the mixture consisting of 70 to 95 molar parts of the monomers A and B and 5 to 30 molar parts of the copolymer of the composition A.sub.1 -B.sub.1 is transferred continuously to the second tank reactor and is polymerized there up at a further conversion of 5 to 55 molar parts to a total conversion of 20 to 60 molar parts to give further copolymer of the compositionA.sub.1. 49 to 53 mol % of .alpha.-methylstyrene andB.sub.1. 51 to 47 mol % of acrylonitrile,0,5 to 11.5 molar parts of acrylonitrile being removed from the vapor condenser of the second tank reactor and recycled to the first tank reactor per unit time.

    摘要翻译: α-甲基苯乙烯和丙烯腈的热塑性共聚物的制备方法,通过A.在30℃〜120℃的温度下,将A.30〜50摩尔%的α-甲基苯乙烯和B.70〜50摩尔%的丙烯腈与 在至少两台连续操作的混合罐式反应器中进行自由基引发剂的存在下,平均停留时间为4至12小时,其特征在于,将100摩尔份的A0的单体混合物。 34〜52摩尔%的α-甲基苯乙烯和B0。 将66〜48摩尔%的丙烯腈连续进料到第一罐式反应器中,并且通过反混合共聚至5-30摩尔份的转化率,得到组合物A1的共聚物。 49〜53摩尔%的α-甲基苯乙烯和B1。 丙烯腈为51〜47摩尔%,将由70〜95摩尔份的单体A,B和5〜30摩尔份的组合物A1-B1的共聚物组成的混合物连续地转移到第2槽式反应器中, 在其上进一步转化5至55摩尔份,总转化率为20至60摩尔份,得到组合物A1的其它共聚物。 49〜53摩尔%的α-甲基苯乙烯和B1。 丙烯腈为51〜47摩尔%,丙烷腈为0.5〜11.5摩尔份,从第二罐式反应器的蒸气冷凝器中除去,每单位时间再循环至第一罐式反应器。