摘要:
The invention relates to a method for producing vinyl chloride-vinyl acetate copolymers in the form of their solid resins by means of radically initiated suspension polymerization in an aqueous medium consisting of 70 to 90 % by weight of vinyl chloride, 10 to 30 % by weight of vinyl acetate and optionally other comonomers that can be copolymerized therewith. The invention is characterized in that 0.1 to 5 % by weight of a vinyl acetate-vinyl chloride copolymer that is soluble in ethyl acetate are present, the indications in % by weight relating to the total weight of the comonomers.
摘要:
The invention relates to a floor covering adhesive composition, based on an aqueous, emulsifier-stabilized polymer dispersion of vinyl acetate-ethylene copolymer, containing A) tackifying resin, B) one or more fillers, and C) a vinyl acetate-ethylene copolymer in the form of an emulsifier-stabilized aqueous dispersion, characterized in that the vinyl acetate-ethylene copolymer is obtained by radical-initiated emulsion polymerization in an aqueous medium, of a) 60 to 89.9% by weight of vinyl acetate, b) 10 to 36% by weight of ethylene, c) 0 to 2% by weight of one or more monomers selected from the group of vinyl esters of carboxylic acids having 8 to 12 C atoms and acrylic acid alkyl esters having a C 1 to C 8 alkyl radical, d) 0.1 to 5% by weight of one or more ethylenically unsaturated auxiliary monomers having a carboxylic acid group, amide group, nitrile group or sulfonic acid (salt) group, wherein the percentages stated in % by weight are each in relation to the total weight of the comonomers and add up to 100% by weight, and the polymerization is carried out in the presence of one or more emulsifiers.
摘要:
The invention relates to the use of copolymers as tackifiers for adhesives containing one or more base polymers, one or more tackifiers, optionally one or more fillers and optionally one or more additives, characterized in that the copolymers used as tackifiers can be obtained by radically initiated polymerization of: a) one or more ethylenically unsaturated monomers selected from the group comprising vinyl acetate, methyl methacrylate, methacrylate and styrene; b) 5 to 60 wt% of one or more ethylenically unsaturated monomers selected from the group comprising vinyl esters of branched or unbranched alkyl carboxylic acids with 3 to 15 C atoms and acrylic acid esters or methacrylic acid esters of branched or unbranched alcohols with 2 to 22 C atoms; and c) 0.5 to 15 wt% of one or more ethylenically unsaturated monomers containing at least one functional group selected from the group comprising sulphonic acid, sulphuric acid, phosphonic acid or carboxylic acid groups or the salts of said acids, carboxylic acid anhydride groups, hydroxy groups, silicon-functional groups and amino or ammonium groups, the specifications of wt% each relating to the total weight of the respective copolymer.
摘要:
The invention relates to vinyl chloride mixed polymers which can be obtained by means of the radically initiated polymerisation of a mixture of vinyl chloride, vinyl monomers containing epoxide, and other comonomers which can be copolymerised therewith. Said mixed polymers are characterised in that a) between 49.5 and 90 wt. % vinyl chloride, b) between 0.01 and 0.7 wt. % vinyl monomers containing epoxide, and c) between 9.5 and 50 wt. % of other comonomers which can be copolymerised with a) and b) are polymerised. According to the invention, the amounts in wt. % are added together to equal 100 wt. %, and, optionally during or following the polymerisation, between 0.001 and 0.1 wt. % of at least one carboxylic acid is added from the group containing aliphatic and alicyclic, saturated and unsaturated dicarboxylic acids containing between 1 and 10 C atoms, and aliphatic and alicyclic, saturated and unsaturated hydroxymonocarboxylic, hydroxydicarboxylic, and hydroxytricarboxylic acids containing between 3 and 10 C atoms and between 1 and 4 hydroxy groups.