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Method for the surface modification of objects made of polyvinylidene fluoride

  • US 4,740,562 A
  • Filed: 05/22/1986
  • Issued: 04/26/1988
  • Est. Priority Date: 06/07/1985
  • Status: Expired due to Fees
First Claim
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1. Method for the surface modification of objects made of polyvinylidene fluoride, especially for achieving bonding and hydrophilizing properties and for the producton of composite structures, comprising dehydrofluorinating the surface of the objects with an etching solution which contains one or more alkali metal alcoholates and/or alkali metal hydroxides and one or more swelling agent and/or solvent for polyvinylidene fluoride and at least one auxiliary agent for the homogenization and stabilization acting at the same time as a solubilizer for the alcoholate and the hydroxide, the auxiliary agent being a compound of the formula:

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    space="preserve" listing-type="equation">A--(CR.sub.2)n--S--[(CR.sub.2)n--X--]m(CR.sub.2)n--Bwherein A and B, which can be either identical or different, represent an OR or NR2 group;

    X is an oxygen atom or an NR group;

    R residues, which can be either identical or different, represent a hydrogen atom or an alkyl group with 1 to 6 carbon atoms;

    n is an integer of 1 to 6; and

    m is an integer of 0 to 50.

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