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Emulsion PVC prepn. of flexible PVC paste - by emulsion polymerisation of vinyl chloride in the presence of a salt of a substd. di:phenyl ether sulphonate as emulsifier
Emulsion PVC prepn. of flexible PVC paste - by emulsion polymerisation of vinyl chloride in the presence of a salt of a substd. di:phenyl ether sulphonate as emulsifier
Prodn. of PVC comprises emulsion polymerisation of vinyl chloride in aq. medium in the presence of an alkylaryl-sulphonate salt of formula (I) as emulsifier, after which the latex obtd. is dried and the prod. is converted into a paste. R = 4-24C hydrocarbyl; X = halogen or 1-4C alkoxy; M = mono- or di-valent cation (1 equiv.); n = 0.5-3; p = 0-2; and m = 1-4. Also claimed are (i) PVC obtd. by this process; (ii) flexible PVC contg. cpd. (I); 2nd (iii) prepns. contg. 20-80 wt% emulsion-PVC, 0.1-4 wt.% (w.r.t. PVC) cpd(s) (I), 20-80 wt% plasticiser and opt. conventional additives (to 100%). Pref., the process involves continuous polymerisation or copolymerisation of vinyl chloride with a comonomer, followed by spray drying using a 1- or 2-component nozzle. At least one other surfactant is used in addn. to (I), and (I) is added to the latex before drying, or at the paste prepn. stage. Pref., (I) has R = 10-16C hydrocarbyl, X = Cl, M = Na or K, n = 1-2, p = 0, m = 2, with one sulphonate gp. on each ring. USE/ADVANTAGE - Flexible PVC prepns. (pastes) made from the above prod. are useful for the prod. of transparent coatings and other articles. Use of (I) as emulsifier gives prods. with low paste viscosity, together with greater transparency and lower water absorption than those obtd. by the process described in EP-A 73015 (in which the emulsifier is a cpd. such Na dodecylbenzene-sulphonate).
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机译：产品PVC的制备包括氯仿在氯仿水溶液中的乳液聚合。在式（I）的烷基芳基-磺酸盐作为乳化剂存在下，在此之后乳化。干燥和生产。被转换成糊状。 R = 4-24C烃基; X =卤素或1-4C烷氧基; M =一价或二价阳离子（1当量）; n = 0.5-3; p = 0-2;并且m = 1-4。还要求保护（i）PVC obtd。通过这个过程; （ii）柔软的聚氯乙烯。 cpd。 （一世）;第二（iii）节。续20-80重量％乳液PVC，0.1-4重量％（w.r.t. PVC）cpd>（I），20-80重量％增塑剂并选择常规添加剂（至100％）。优选地，该方法包括氯乙烯与共聚单体的连续聚合或共聚，然后使用1-或2-组分喷嘴进行喷雾干燥。另外，至少使用一种其他表面活性剂。 （I），然后在干燥之前或在糊剂中将（I）加入到胶乳中。阶段。优选，（I）具有R ＝ 10-16C的烃基，X ＝ Cl，M ＝ Na或K，n ＝ 1-2，p ＝ 0，m ＝ 2，具有一个磺酸盐gp。在每个环上。使用/优势-柔性PVC制备。 （粘贴）由上述产品制成。对产品很有用。透明涂料和其他物品。使用（I）作为乳化剂可得到产品。糊状粘度低，透明度高，吸水率低。通过EP-A 73015中描述的方法（其中乳化剂为cpd，例如十二烷基苯磺酸钠）。
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