Process for the production of methyl methacrylate homo- or co-polymers
    41.
    发明授权
    Process for the production of methyl methacrylate homo- or co-polymers 失效
    制备甲基丙烯酸甲酯均聚物或共聚物的方法

    公开(公告)号:US4369296A

    公开(公告)日:1983-01-18

    申请号:US243877

    申请日:1981-03-16

    CPC分类号: C08F20/14

    摘要: A process for the polymerization of methyl methacrylate or mixtures thereof with up to 25%, by weight, based on total monomer, of vinyl monomers copolymerizable therewith, wherein polymerization is carried out in the presence of from 0.01 to 10%, by weight, based on total monomer, of one or more enol ethers derived from aliphatic or cycloaliphatic aldehydes or ketones.

    摘要翻译: 一种聚合甲基丙烯酸甲酯或其混合物的方法,其具有至多25重量%的基于总单体的可与其共聚的乙烯基单体,其中聚合在0.01至10重量%的基础上进行,基于 在一个或多个衍生自脂族或脂环族醛或酮的烯醇醚的总单体上。

    Dental material based on crosslinked plastic and polymerizable binder
    42.
    发明授权
    Dental material based on crosslinked plastic and polymerizable binder 失效
    基于交联塑料和可聚合粘合剂的牙科材料

    公开(公告)号:US4369262A

    公开(公告)日:1983-01-18

    申请号:US283761

    申请日:1981-07-16

    IPC分类号: A61K6/083 A61K6/08

    CPC分类号: A61K6/083

    摘要: The invention includes dental materials based on organic plastics in paste form, comprising at least one phase consisting essentially of finely divided, crosslinked plastics which contain copolymerized ester(s) of methacrylic acid to the extent of at least 50% by weight, and the second phase consisting essentially of ester(s) of methacrylic acid to the extent of at least 50% by weight. The materials can be used for making prostheses, crowns, bridges, artificial teeth, dental fillings, etc.

    摘要翻译: 本发明包括基于糊状形式的基于有机塑料的牙科材料,其包含至少一个相,其基本上由细碎的交联塑料组成,其中含有至少50重量%程度的甲基丙烯酸的共聚酯,第二相 基本上由甲基丙烯酸酯代表至少50重量%的程度。 这些材料可用于制造假肢,冠,桥,人造牙,牙齿填充物等。

    Acrylonitrile polymerization with organic solvent
    43.
    发明授权
    Acrylonitrile polymerization with organic solvent 失效
    丙烯腈与有机溶剂聚合

    公开(公告)号:US4326051A

    公开(公告)日:1982-04-20

    申请号:US170376

    申请日:1980-07-21

    IPC分类号: C08F20/44 C08F2/06 C08F22/30

    CPC分类号: C08F20/44

    摘要: The invention relates to a homopolymer or copolymer of acrylonitrile which comprises from 0 to 30% by weight, incorporated by polymerization, of comonomer units which are free from ionic groups, said polymers having a K-value of from 50 to 100, a dye absorption capacity for cationic dyes of at least 0.5% by weight, a conductivity, measured in dimethylformamide solution, of at least 10.mu. Siemens, and from 0.2 to 1.5% by weight of sulphur fixed to said polymer as well as to a process for the production thereof.

    摘要翻译: 本发明涉及丙烯腈的均聚物或共聚物,其包含0-30重量%,通过聚合引入,不含离子基团的共聚单体单元,所述聚合物的K值为50至100,染料吸收 阳离子染料的能力为至少0.5重量%,在二甲基甲酰胺溶液中测量的至少10微米西门子的电导率和0.2至1.5重量%的固定在所述聚合物上的硫以及生产方法 其中。

    Acrylonitrile polymerization in fluorinated hydrocarbons
    45.
    发明授权
    Acrylonitrile polymerization in fluorinated hydrocarbons 失效
    氟化烃中的丙烯腈聚合

    公开(公告)号:US4255546A

    公开(公告)日:1981-03-10

    申请号:US077460

    申请日:1979-09-20

    CPC分类号: C08F20/44

    摘要: The invention relates to a process for the production of polyacrylonitrile or acrylonitrile copolymers, the polymerization being carried out at a temperature of from -40.degree. to +60.degree. C. optionally under pressure in an aliphatic chlorofluorine or fluorine substituted hydrocarbon containing up to 8 carbon atoms and having a boiling point of from -60.degree. to +50.degree. C. or in mixtures thereof having boiling ranges of from -60.degree. to +50.degree. C. and using a starter system comprising a hydroperoxide sulphur dioxide and an acid. The system may also contain aliphatic hydrocarbons in such quantities that a non-inflammable mixture is formed.

    摘要翻译: 本发明涉及一种生产聚丙烯腈或丙烯腈共聚物的方法,该聚合反应在-40℃至+ 60℃的温度下进行,任选在压力下进行,在含有最多8个碳原子的脂族氯氟氟或氟取代烃中 原子,沸点为-60℃至+ 50℃,或其沸点范围为-60至+50℃的混合物,并使用包含氢过氧化物二氧化硫和酸的起始系统。 该系统还可以含有以不可燃混合物形成的量的脂族烃。

    Process for the production of bead polymers
    46.
    发明授权
    Process for the production of bead polymers 失效
    生产珠粒聚合物的方法

    公开(公告)号:US4233424A

    公开(公告)日:1980-11-11

    申请号:US899980

    申请日:1978-04-25

    摘要: A two-phase bead polymer having an average bead diameter of 10 to 120.mu., and comprising (A) 88 to 99.5% by weight of a polymer of polymerized units of at least one methacrylic acid ester containing from 1 to 10 carbon atoms in the aliphatic, saturated alcohol component, the methacrylic ester polymer, optionally, containing up to 30% by weight of copolymerized units of at least one monomer selected from acrylic acid esters containing from 1 to 10 carbon atoms in the aliphatic saturated alcohol component, hydroxyalkyl esters of methacrylic acid containing from 2 to 4 carbon atoms in the alkyl group, styrene, vinyl acetate, (meth)acrylamide, (meth)acrylic acid and/or itaconic acid, and (B) 0.5 to 12% by weight of a polyurethane.

    摘要翻译: 平均珠粒直径为10〜120μm的二相珠粒聚合物,其含有(A)88〜99.5重量%的至少一种含有1〜10个碳原子的甲基丙烯酸酯的聚合单元的聚合物 脂族饱和醇组分,所述甲基丙烯酸酯聚合物任选地含有至多30重量%的共聚单元的至少一种选自在脂族饱和醇组分中含有1至10个碳原子的丙烯酸酯的单体,羟烷基酯 在烷基中含有2至4个碳原子的甲基丙烯酸,苯乙烯,乙酸乙烯酯,(甲基)丙烯酰胺,(甲基)丙烯酸和/或衣康酸,和(B)0.5-12重量%的聚氨酯。

    Process for the production of PUH elastomer threads and films resistant
to light and exhaust gases and elastomer threads having the required
composition
    48.
    发明授权
    Process for the production of PUH elastomer threads and films resistant to light and exhaust gases and elastomer threads having the required composition 失效
    生产PUH弹性体螺纹和薄膜的方法适用于具有所需组分的轻型和排气气体和弹性体螺纹

    公开(公告)号:US5086150A

    公开(公告)日:1992-02-04

    申请号:US585959

    申请日:1990-09-21

    摘要: This invention relates to a process for the production of light resistant and exhaust gas resistant PUH elastomer threads and films based on segmented polyurethane ureas which are based on diisocyanate mixtures of from 30 to 85 mol% of trans-1,4-cyclohexylene diisocyanate and from 70 to 15 mol% of other aliphatic or cycloaliphatic diisocyanates. The diisocyanates are first reacted with relatively high molecular weight dihydroxy compounds and optionally low molecular weight diols to form an isocyanate prepolymer which is then reacted with aliphatic diamines or diamine mixtures, preferably ethylene diamine, in highly polar solvents, optionally in the presence of salt type solubilizing agents such as lithium salts and preferably with the aid of aliphatic chain terminators, in particular those having a cycloaliphatic structure, to produce elastomer solutions which are stable under processing conditions. These solutions are spun in the conventional manner or dried to form films or coagulated to form sheet products.The invention also relates to the segmented polyurethane urea elastomers, in particular threads, obtainable by the new process.

    摘要翻译: 本发明涉及一种基于分段聚氨酯脲的生产耐光,耐废气PUH弹性体丝和薄膜的方法,该聚氨酯脲基于30至85摩尔%的反式-1,4-亚环己基二异氰酸酯和二异氰酸酯的二异氰酸酯混合物 70至15摩尔%的其它脂族或脂环族二异氰酸酯。 二异氰酸酯首先与相对高分子量的二羟基化合物和任选的低分子量二醇反应以形成异氰酸酯预聚物,然后将其与脂族二胺或二胺混合物,优选乙二胺在高极性溶剂中,任选在盐型存在下反应 增溶剂如锂盐,优选借助于脂族链终止剂,特别是具有脂环族结构的那些,以产生在加工条件下稳定的弹性体溶液。 这些溶液以常规方式纺丝或干燥以形成薄膜或凝固以形成片材产品。 本发明还涉及可通过新工艺获得的分段聚氨酯脲弹性体,特别是螺纹。

    Ester-urethane derivatives of (meth)-acrylic acid for dental materials
    50.
    发明授权
    Ester-urethane derivatives of (meth)-acrylic acid for dental materials 失效
    用于牙科材料的(甲基)丙烯酸的酯 - 氨基甲酸酯衍生物

    公开(公告)号:US4904750A

    公开(公告)日:1990-02-27

    申请号:US287424

    申请日:1988-12-20

    摘要: Dental fillings, coatings and teeth are formed of polymers and copolymers of a polyfunctional ester-urethane derivative of (meth)-acrylic acid of the formula ##STR1## in which A is a straight-chain or branched aliphatic radical which has 2 to 20 carbon atoms and optionally contains 1 to 3 oxygen bridges, an aromatic radical with 6 to 24 carbon atoms, an araliphatic radical with 7 to 26 carbon atoms or a cycloaliphatic radical with 6 to 26 carbon atoms,r denotes the number of chains starting from A and denotes a number from 2 to 6,R.sup.1 and R.sup.2 are identical and denote hydrogen or are different and denote hydrogen and methyl,n denotes a number from 0 to 5 independently for each chain starting from A,X stands for the group ##STR2## in which Y denotes a divalent (cyclo)aliphatic radical which has 2 to 15 carbon atoms and optionally contains ester, ether or urethane groups,Z denotes a divalent straight-chain or branched aliphatic hydrocarbon radical which has 3 to 15 carbon atoms and can optionally contain 1 to 3 oxygen bridges and can optionally be substituted by 1 to 4 additional (meth)-acrylate radicals andR.sup.3 denotes hydrogen or methyl independently for each chain starting from A.

    摘要翻译: 牙科填充物,涂料和牙齿由式(IMA)(I)的(甲基)丙烯酸的多官能酯 - 氨基甲酸酯衍生物的聚合物和共聚物形成,其中A是直链或支链脂族基团,其具有2 至20个碳原子,并且任选地含有1至3个氧桥,具有6至24个碳原子的芳族基团,具有7至26个碳原子的芳脂族基团或具有6至26个碳原子的脂环族基团,r表示链起始数 从A表示2至6的数,R1和R2相同并且表示氢或不同,表示氢和甲基,n表示从A开始独立地为0至5的数,X表示< IMAGE>其中Y表示具有2至15个碳原子并且任选地含有酯,醚或氨基甲酸酯基团的二价(环)脂族基团,Z表示具有3至15个碳原子的二价直链或支链脂族烃基, ca n任选地含有1至3个氧桥,并且可以任选地被1至4个另外的(甲基)丙烯酸酯基团取代,并且对于从A开始的每个链,R 3表示氢或甲基。