4.
    发明专利
    未知

    公开(公告)号:BR0312290A

    公开(公告)日:2005-04-12

    申请号:BR0312290

    申请日:2003-06-20

    Abstract: The present invention relates to polymerized hydrogels and processes to make such hydrogels, in particular hydrogel adhesives which are capable of attaching to mammalian skin and can be used in various personal care products, such as waste-management articles, and a variety of functional articles to be worn by a human. The hydrogels described herein are characterized by very low amount of residual starting monomers, impurities, and/or by-products that could be formed during polymerization. Specifically, the hydrogels are made by adding scavengers and/or chain transfer agent prior to polymerization. It has been found, that upon addition of same scavengers the material properties of the polymerized hydrogel differ from the properties of gels polymerized without the scavenger. This is due to the fact, that these specific scavengers act also as chain transfer agents in the radical polymerization. Further studies showed that also chain transfer agents, that are no scanvengers for residual monomer(s), impurities or byproducts influence the material properties of the polymerized hydrogel adhesive.

    METHOD FOR PRODUCING COATINGS STICKING DISCRETE PATTERNS ON A SUBSTRATE

    公开(公告)号:CA2490890A1

    公开(公告)日:2004-01-15

    申请号:CA2490890

    申请日:2003-07-03

    Applicant: BASF AG

    Abstract: The invention relates to a method for producing discrete patterns of a sticking coating on a substrate, comprising the following steps: (a) moving continuously or discontinuously the substrate in a conveyor device; (b) flat ly applying a low viscosity, polymerizable and/or cross-linkable precursor material of a sticking material through at least one opening substantially configured in the form of a slot of a movable application device on the substrate, whereby a pattern is produced by moving the application device relative to the substrate and (c) the applied precursor material is polymerized and/or crosslinked downstream of the application area.

Patent Agency Ranking