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AssigneeBASF SE
InventorsErich Penzel, Lothar Maempel, Hans J. Neumann, Karl-Clemens Peters, Oral Aydin
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Floor covering adhesives substantially comprising A. a dispersion of a copolymer of 20-60% by weight of vinylidene chloride 34-80% by weight of a mixture of 40-80 parts by weight of esters of acrylic acid with C.sub.1 -C.sub.18 -alkanols and 20-60 parts by weight of vinyl esters and 0.5 to 6% by weight of .alpha.,62 -monoolefinically unsaturated C.sub.3 -C.sub.5 -mono- and/or dicarboxylic acids and/or amides thereof and/or vinyl sulfonate, B. 30-150 parts by weight (solid), based on 100 parts of a copolymer of A, of tackifying resins from the group of the rosins and derivatives thereof, C. 0-50 parts by weight, based on 100 parts of resin B, of plasticizers and/or liquid resins and also, if desired, D. fillers, are shampoo-resistant and have a high peel strength.
A floor covering adhesive consisting essentially of:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Homopolymers or copolymers of esters of monocarboxylic acids: homopolymers or copolymers of vinyl acetate
Containing chlorine atoms: homopolymers or copolymers of vinylidene chloride
Copolymers with monomers not covered by C09J133/06: containing anhydride, COOH or COOM groups, with M being metal or onium-cation
Compositions of natural resins
Term ended 21 Oct 2006 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present adhesives for floor coverings comprise rosins, for example balsam resin WW, finely divided chalk and polyvinyl ethers, for example polyvinyl isobutyl ether of a molecular weight of from 2 to 3.times.10.sup.5 (Fikentscher K value 55-65) as plasticizer. They also contain from 20 to 30% by weight based on the rosin, of organi solvents, such as methanol, ethanol, ethyl acetate, toluene, benzin and other hydrocarbons. In general they contain mixtures of some of the solvents mentioned. Such adhesives are extensively used, since they have good processing properties, in particular at low temperatures, have high grab and produce strong adhesive bonds. The disadvantage is the relatively high level of organic solvent. Inhalation of solvent vapor exposes floorers to health risks. In addition, there have been instances of explosions causing damage and injuries. Finally, the release of solvent into the atmosphere amounts to sizable environmental pollution, given the total area of floor coverings laid each year.
An environmentally more acceptable option for use as binders in adhesive for floor coverings are aqueous polymer dispersions; the adhesives are then solvent-free.
Commercially available polymer dispersions which are suitable for use as binders are based on different monomers. Dispersions of butadiene and styrene are compounded with liquid resins, ie. resins having a melting point below 20.degree. C., and small amounts of plasticizers and fillers, such as chalk and/or quartz powder. The disadvantage is in this case the ageing behavior of the adhesive bonds, which tend to become brittle with time.