摘要:
Une composition liante pour des matières fibreuses non-tissées comprend une émulsion copolymère à base d'au moins 30 % en poids d'alcanoate de vinyle et utilise du N-(n-butoxyméthyle) acrylamide (NBMA) comme agent de réticulation de post-polymérisation afin de réduire les émissions de formaldéhyde.
摘要:
The copolymers formed by emulsion polymerisation may include a crosslinking agent to provide desired product properties. Widely used agents of this class, eg N-methylol acrylamide, will release formaldehyde during the crosslinking stage. Invention provides class, CH₂=C(R)-CO-NH-O-R¹, which provides post emulsion cross-linking with acceptor sites without release of formaldehyde.
摘要:
Une émulsion de copolymère utilisée comme revêtement de papier, à base d'acétate de vinyle, améliore sa résistance à l'attaque humide si on lui ajoute des esters vinyliques d'acides carboxyliques à ramifications tertiaires.
摘要:
The adhesive properties of a vinyl acetate/ethylene copolymer emulsion having grafted polyvinyl alcohol for filmic substrates, eg polypropylene is improved by blending with an acrylate copolymer emulsion optionally including carboxylic monomers.
摘要:
A vinyl(C1 to C4)alkanoate/alkylene or alkyl(C1 to C12)acrylate copolymer emulsion is overpolymerised with alkyl acrylates and/or acrylonitrile. The product emulsions are usable as binders for textiles, carpets and paper; they provide improved water and solvent resistance for the treated substrate.
摘要:
The embossing of surfaces, eg book covers, typically involves the use of a plastisol based on poly vinyl chloride. These plastisols can release vinyl chloride or plasticiser when heated to embossing temperatures. The present invention uses a vinyl acetate/ethylene based copolymer emulsion in the form of a paste to prepare an embossable surface.
摘要:
A self crosslinking vinyl(C1 to C4)alkanoate/alkylene copolymer emulsion is overpolymerised with alkyl(C1 to C4) (meth)acrylate, acrylonitrile or mixtures of these monomers. The product emulsions are usable as binders for textiles, carpets and paper; they provide solvent resistance while retaining toughness/softness to the treated substrate.
摘要:
Vinyl ester polymer emulsions of improved resistance to sedimentation upon dilutation are prepared in the presence as stabiliser of a derivatised poly vinyl alcohol, having an ionisable group, preferably a carboxylate, silanated or quarternised group.
摘要:
A self crosslinking vinyl(C1 to C4)alkanoate/alkylene copolymer emulsion is overpolymerised with alkyl(C1 to C4) (meth)acrylate, acrylonitrile or mixtures of these monomers. The product emulsions are usable as binders for textiles, carpets and paper; they provide solvent resistance while retaining toughness/softness to the treated substrate.
摘要:
The invention relates to the use of a polymer obtained by emulsion or suspension polymerisation of an ethylenically unsaturated monomer or mixture of more than one such a monomer in the presence of a hydrocarbon wax having a melting point of 25 to 125°C which is incorporated in the polymer during polymerization as a coating material for imparting or improving hydrophobicity and/or moisture vapour resistance of an substrate of the group comprising organic materials and metal. Also the invention provides a process for imparting or improving hydrophobicity and/or moisture vapour resistance of an organic substrate by coating the substrate with a polymer obtained by emulsion or suspension polymerisation. Also the invention provides certain polymeric materials which are useful for the above identified purpose.