Process for Manufacturing Medium and High Molecular Weight Polyesters

    公开(公告)号:US20170306086A1

    公开(公告)日:2017-10-26

    申请号:US15450362

    申请日:2017-03-06

    CPC classification number: C08G63/81

    Abstract: Medium and high molecular weight polyester polymers are prepared in syrup form from an ester oligomer. The oligomer is converted to the polymer by polycondensation at elevated pressure and elevated temperature in a nonreactive carrier capable of forming an azeotrope with water. The ester oligomerization or polycondensation reactions desirably are monitored using a non-viscometric technique. The process has a rapid cycle time. The syrup contains the polymer and nonreactive carrier, and may more conveniently be used to make initially non-solid products such as polyester coatings than is the case when employing pelletized solid polyester resins.

    HIGH BLOCK, TACK AND SCRUB RESISTANT POLYMER
    98.
    发明申请

    公开(公告)号:US20170226369A1

    公开(公告)日:2017-08-10

    申请号:US15437879

    申请日:2017-02-21

    CPC classification number: C09D133/12 C09D5/00 C09D7/80 C09D121/02 C09D133/08

    Abstract: The present invention is directed to a coating composition or paint comprising a multistage latex with at least first and second stages, wherein the composition or paint is substantially free of volatile organic compounds (VOC) and capable of film formation even in the absence of coalescent agents. The base paint formulation is capable of being tinted at a point-of-sale (i.e. in-store) using a colorant composition of a type and quantity required to produce a paint of desired color and finish. The paints, including deeply colored paints, show improved block resistance, scrub resistance and tack resistance.

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