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    • 1. 发明授权
    • Recovery of hydroxycarboxylic acid values from poly(hydroxycarboxylic
acids)
    • 从聚(羟基羧酸)中回收羟基羧酸值
    • US5342969A
    • 1994-08-30
    • US25923
    • 1993-03-03
    • Thomas M. FordJames V. Hockessin
    • Thomas M. FordJames V. Hockessin
    • C07D319/12
    • C07D319/12Y02P20/582
    • A improved process for depolymerizing a poly(alpha-hydroxycarboxylic acid) to its corresponding dimeric cyclic ester is disclosed. The process comprises:(i) depolymerizing the poly(alpha-hydroxycarboxylic acid) to its corresponding dimeric cyclic ester by heating the poly(alpha-hydroxycarboxylic acid) in a reaction zone at a temperature and pressure at which the poly(alpha-hydroxycarboxylic acid) is molten;(ii) forming a vapor product stream containing the dimeric cyclic ester;(iii) removing the vapor product stream from the reaction zone; and (iv) recovering the dimeric cyclic ester from the product stream; the improvement comprising: adding the dimeric cyclic ester to step (i) in the ratio of 0.01 to 0.5 part by weight of dimeric cyclic ester per part by weight of the poly(alpha-hydroxycarboxylic acid).
    • 公开了一种将聚(α-羟基羧酸)解聚为其相应的二聚环酯的改进方法。 该方法包括:(i)通过在反应区中在聚α-羟基羧酸的温度和压力下加热聚(α-羟基羧酸)将聚(α-羟基羧酸)解聚为其相应的二聚环状酯 )熔化; (ii)形成含有二聚环酯的蒸气产物流; (iii)从反应区除去蒸气产物流; 和(iv)从产物流中回收二聚环酯; 所述改进包括:将步骤(i)中的二聚环酯以每重量份聚(α-羟基羧酸)为0.01至0.5重量份的二聚环酯的比例加入。
    • 4. 发明授权
    • Compact personal roller
    • 紧凑型个人滚筒
    • US4571769A
    • 1986-02-25
    • US611712
    • 1984-05-18
    • Thomas M. Ford
    • Thomas M. Ford
    • A45D34/04B05C17/02
    • A45D34/041A45D2200/1018A45D2200/1081
    • A compact roller applicator for personal use in the application of sun tan and protective lotions to the body. The small roller, and short handle provides an extension of arms reach, making it possible for oneself to easily and thoroughly apply protective lotions to the area of ones own back. Protective lotion is deposited on the resilient foam roller cover. The protective lotion is then applied to the back, or other areas of the body by light roller movement. The handle and cradle uni-body incorporates a retractable pivotal protective cover for protection of the roller. The retractable pivotal protective cover is held in open or closed position by detent action. The resilient foam covered roller is easily removed for replacement. The compact size, and light weight permits portability.
    • 用于个人使用的紧凑型滚筒敷贴器,用于将晒黑和防护性洗剂应用于身体。 小滚筒和短柄提供伸展臂,使自己可以轻松,彻底地将保护性乳液应用于自己的背部。 保护乳液沉积在弹性泡沫辊罩上。 然后通过轻轻的滚动运动将保护性洗剂施加到身体的背部或其他区域。 手柄和摇篮单体包含可伸缩的枢转保护盖,用于保护滚筒。 可伸缩的枢转保护罩通过制动作用保持在打开或关闭位置。 弹性泡沫覆盖辊容易拆下来更换。 紧凑的尺寸和重量轻允许便携性。