Copolymers for pressure-sensitive adhesives based on acrylic esters,
(meth)acrylamide vinyl acetate and ethylene
    3.
    发明授权
    Copolymers for pressure-sensitive adhesives based on acrylic esters, (meth)acrylamide vinyl acetate and ethylene 失效
    基于丙烯酸酯,(甲基)丙烯酰胺乙酸乙烯酯和乙烯的压敏粘合剂共聚物

    公开(公告)号:US4322516A

    公开(公告)日:1982-03-30

    申请号:US131785

    申请日:1980-03-19

    摘要: A copolymer having good properties for use as a pressure-sensitive adhesive from an aqueous dispersion comprising:(a) from 10% to 30% by weight of ethylene units,(b) from 29% to 69% by weight of acrylic ester units,(c) from 20% to 55% by weight of vinyl acetate units,(d) from 0.2% to 8% by weight of (meth)acrylamide units, and(e) from 0 to 12% of other olefinically-unsaturated monomer units copolymerizable with the above,said copolymer having a glass transition temperature of from -20.degree. C. to -60.degree. C. and a K-value according to Fikentscher, measured in tetrahydrofuran, of from 50 to 180; as well as processes to make the same and aqueous dispersions of the same for use as pressure-sensitive adhesives.

    摘要翻译: 一种由水分散体用作压敏粘合剂的具有良好性能的共聚物,其包含:(a)10重量%至30重量%的乙烯单元,(b)29重量%至69重量%的丙烯酸酯单元, (c)20重量%至55重量%的乙酸乙烯酯单元,(d)0.2重量%至8重量%的(甲基)丙烯酰胺单元,和(e)0至12重量%的其它烯属不饱和单体单元 与上述共聚物,所述共聚物的玻璃化转变温度为-20℃至-60℃,根据Fikentscher测得的K值在四氢呋喃中为50至180; 以及制备相同的水性分散体并用作压敏粘合剂的方法。

    Process for reducing content of free vinyl chloride by posttreating
copolymer with redox catalyst
    4.
    发明授权
    Process for reducing content of free vinyl chloride by posttreating copolymer with redox catalyst 失效
    通过用氧化还原催化剂后处理共聚物来降低游离氯乙烯含量的方法

    公开(公告)号:US4205161A

    公开(公告)日:1980-05-27

    申请号:US858206

    申请日:1977-12-07

    CPC分类号: C08F214/06 C08F6/006

    摘要: A process for the manufacture of vinyl chloride copolymers having a reduced content of free vinyl chloride comprising polymerizing a monomer mixture containing from 15% to 90% by weight of vinyl chloride under aqueous emulsion polymerization conditions with conventional post-polymerization, releasing the pressure, flushing the gas space above the copolymer dispersion free of monomer, cooling the copolymer dispersion to a temperature of from 10.degree. to 40.degree. C., adding a redox catalyst to the cooled dispersion consisting of from 0.002% to 0.5% by weight of the dispersion of an oil-soluble peroxy compound, and a water-soluble sulfur-containing reducing agent in a ratio of reducing agent to peroxy compound of 0.5 to 3 equivalents, allowing the dispersion to stand at a temperature of from 10.degree. to 40.degree. C. for a period of two hours to two days and recovering a copolymer dispersion having a vinyl chloride content of less than 50 ppm.

    摘要翻译: 一种制造具有降低的游离氯乙烯含量的氯乙烯共聚物的方法,包括在含水乳液聚合条件下聚合含有15-90%重量的氯乙烯的单体混合物,常规后聚合,释放压力,冲洗 在共聚物分散体上方的气体空间不含单体,将共聚物分散体冷却至10℃至40℃的温度,向冷却的分散体中加入氧化还原催化剂,该分散体由0.002重量%至0.5重量% 油溶性过氧化合物和还原剂与过氧化合物的比例为0.5〜3当量的水溶性含硫还原剂,使分散体在10℃〜40℃的温度下放置, 时间为2小时至2天,并回收氯乙烯含量小于50ppm的共聚物分散体。

    Process for the manufacture of aqueous ethylene/vinyl chloride/vinyl
alkanoate and/or alkyl acrylate copolymer dispersions having a
non-uniform particle size distribution
    6.
    发明授权
    Process for the manufacture of aqueous ethylene/vinyl chloride/vinyl alkanoate and/or alkyl acrylate copolymer dispersions having a non-uniform particle size distribution 失效
    制造具有不均匀粒度分布的乙烯/氯乙烯/链烷酸乙烯酯水溶液和/或丙烯酸烷基酯共聚物分散体的方法

    公开(公告)号:US4247438A

    公开(公告)日:1981-01-27

    申请号:US63082

    申请日:1979-08-02

    CPC分类号: C08F214/06 C08F210/02

    摘要: Aqueous ethylene/vinyl chloride/vinyl alkanoate and/or alkyl acrylate copolymer dispersions having a non-uniform particle size distribution, in which one particle size distribution maximum is at 0.03 to 0.2.mu. and a second maximum is at 0.15 to 1.mu. and in which 5% to 60% by weight of the particles belong to the amount of particles having said second maximum, which are produced by free-radical polymerization at 0.degree. to 90.degree. C., while stirring, in the presence of emulsifiers which, in amounts of 0.5% to 15% by weight, calculated on the final solid resin, are not added until a polymerization conversion of 1% to 60% by weight of the total amount of monomer has been reached. The copolymer dispersions have solids contents of 20% to 70% by weight of copolymer comprising 20% to 92% by weight of vinyl chloride, 5% to 60% by weight of ethylene and 3% to 75% by weight of vinyl esters and/or acrylic acid esters, and, optionally, up to 15% by weight of other monomers copolymerizable with ethylene and vinyl chloride, said monomers being metered into the polymerization mixture together with the emulsifiers during the manufacturing process.

    摘要翻译: 具有不均匀粒度分布的乙烯/氯乙烯/链烷酸乙烯酯水溶液和/或丙烯酸烷基酯共聚物分散体,其中一个粒度分布最大值为0.03至0.2μm,第二个最大值为0.15至1μm,其中 颗粒的5重量%至60重量%属于具有所述第二最大值的颗粒的量,它是在0-90℃自由基聚合反应产生的,同时搅拌,在乳化剂存在下,其量为 在最终固体树脂计算出的重量百分比为0.5%至15%之间,直到达到单体总量的1%至60%重量的聚合转化率为止。 共聚物分散体的固体含量为20重量%至70重量%的共聚物,其包含20重量%至92重量%的氯乙烯,5重量%至60重量%的乙烯和3重量%至75重量%的乙烯基酯和/ 或丙烯酸酯,以及任选地至多15重量%的可与乙烯和氯乙烯共聚的其它单体,所述单体在制造过程中与乳化剂一起计量加入到聚合混合物中。

    Process for the continuous production of an ethylene/vinyl acetate
copolymer dispersion
    9.
    发明授权
    Process for the continuous production of an ethylene/vinyl acetate copolymer dispersion 失效
    用于连续生产乙烯/乙酸乙烯酯共聚物分散体的方法

    公开(公告)号:US4035329A

    公开(公告)日:1977-07-12

    申请号:US633591

    申请日:1975-11-19

    CPC分类号: C08F218/08 C08F210/02

    摘要: A process for the continuous manufacture of an aqueous ethylene/vinyl acetate copolymer dispersion which comprises continuously copolymerizing ethylene and vinyl acetate and optionally other .alpha.-olefinically unsaturated monomers, in an aqueous emulsion in the presence of an emulsifier and/or a protective colloid, and in the presence of a free-radical-forming redox catalyst system of a reducing agent and an oxidizing agent as well, optionally, as a heavy metal salt, and recovering said ethylene/vinyl acetate copolymer dispersion, characterized by (a) the presence of a molar excess of at least 3 times, preferably from 3 to 10 times, said reducing agent over said oxidizing agent dosed into the reaction medium and (b) adding the monomers continuously to the reaction mixture at such a rate that the concentration of unreacted monomers at no place in the reaction zone exceeds 15% by weight of the total weight of the reaction mixture.

    摘要翻译: 一种用于连续制造乙烯/乙酸乙烯酯共聚物分散体的方法,其包括在水乳液中在乳化剂和/或保护胶体的存在下连续共聚乙烯和乙酸乙烯酯和任选的其它α-烯烃不饱和单体,以及 在还原剂和氧化剂的自由基形成氧化还原催化剂体系的存在下,任选地,作为重金属盐,并回收所述乙烯/乙酸乙烯酯共聚物分散体,其特征在于(a)存在 摩尔过量为所述还原剂至少3倍,优选3至10倍,所述还原剂超过所述投入到反应介质中的氧化剂,和(b)将所述单体连续加入到反应混合物中,使得未反应单体的浓度 在反应区域的任何地方超过反应混合物总重量的15重量%。

    Stable polyvinyl ester dispersions and methods of producing the same
    10.
    发明授权
    Stable polyvinyl ester dispersions and methods of producing the same 失效
    稳定的聚乙烯酯分散体及其制备方法

    公开(公告)号:US3954687A

    公开(公告)日:1976-05-04

    申请号:US511248

    申请日:1974-10-02

    CPC分类号: C08F18/04

    摘要: An improvement in the production of polyvinyl ester dispersions by polymerization of vinyl esters or copolymerization of vinyl esters with up to 40% by weight of oil-soluble, mono-olefinically-unsaturated monomers in an aqueous emulsion in the presence of water-soluble radical-forming polymerization catalysts, protective colloids and optionally emulsifiers and polymerization aids, the improvement comprising using carboxymethyl celluloses having a substitution degree of at least 10 as said protective colloids; as well as stable mixtures of the said polyvinyl ester dispersions and dextrin.

    摘要翻译: 通过乙烯基酯的聚合或乙烯基酯与水溶性单烯属不饱和单体在水溶性单烯属不饱和单体中的存在下,在水溶性基团 - 形成聚合催化剂,保护胶体和任选的乳化剂和聚合助剂,改进包括使用取代度至少为10的羧甲基纤维素作为所述保护胶体; 以及所述聚乙烯酯分散体和糊精的稳定混合物。