Aqueous polymer dispersions
AssigneeBASF SE
InventorsRoelof Balk, Peter Claassen, Onno Graalmann, Leonardus Aan de Meulen, Marinus Visseren
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Abstract
Aqueous polymer dispersions whose polymer is built up of a) at least 50% by weight of butadiene, isoprene or a mixture thereof, b) at least 10% by weight of an ester of (meth)acrylic acid and a C.sub.1 -C.sub.8 -alkanol and c) from 0 to 10% by weight of other comonomers, where the total amount of monomers a) and b) makes up at least 90% by weight of the total amount of monomers, are useful for producing flame-resistant latex foam rubber which contains only hydrates of inorganic salts as flame retardants.
Claims9
A latex foam rubber obtained by applying the Dunlop or Talalay process to an aqueous polymer dispersion said aqueous polymer dispersion being in free-radically polymerized form and said aqueous polymer dispersion comprising a dispersed polymer comprising:
- (a) at least 50% by weight of at least one monomer selected from the group consisting of butadiene and isoprene (monomers a),
- (b) at least 10% by weight of at least one monomer selected from the group consisting of an ester of acrylic acid or methacrylic acid and an alkanol having from 1 to 8 carbon atoms (monomers b) and
- (c) from 0 to 10% by weight of another free-radically copolymerizable monomer containing at least one ethylenically unsaturated group (monomers c),
- with the proviso that the total amount of the monomers a) and b) which are polymerized in in free-radically polymerized form is at least 90% by weight, with the percentages by weight being based on the total amount of the monomers a)+b)+c) which are polymerized into the polymer.
A latex foam rubber whose polymer is in free-radically polymerized form and said polymer is formed of
- (a) at least 50% by weight of at least one monomer selected from the group consisting of butadiene and isoprene (monomers a),
- (b) at least 10% by weight of at least one monomer selected from the group consisting of an esters of acrylic acid or methacrylic acid and an alkanol having from 1 to 8 carbon atoms (monomers b) and
- (c) from 0 to 10% by weight of another free-radically copolymerizable monomer containing at least one ethylenically unsaturated group (monomers c),
- with the proviso that the total amount of the monomers a) and b) which are polymerized in free-radically polymerized form is at least 90% by weight, with the percentages by weight being based on the total amount of the monomers a)+b)+c) which are polymerized into the polymer.
A latex foam rubber whose polymer is in free-radically polymerized form and said polymer is formed of
- (a) at least 50% by weight of at least one monomer selected from the group consisting of butadiene and isoprene (monomers a),
- (b) at least 10% by weight of at least one monomer selected from the group consisting of an esters of acrylic acid or methacrylic acid and an alkanol having from 1 to 8 carbon atoms (monomers b) and
- (c) from 0 to 10% by weight of another free-radically copolymerizable monomer containing at least one ethylenically unsaturated group (monomers c),
- with the proviso that the total amount of the monomers a) and b) which are polymerized in free-radically polymerized form is at least 90% by weight, with the percentages by weight being based on the total amount of the monomers a)+b)+c) which are polymerized into the polymer;
- and further comprising, based on the weight of the polymer, from 35 to 55% by weight of at least one hydrate of inorganic salt.
An aqueous latex foam whose latex is an aqueous polymer dispersion whose polymer is in free-radically polymerized form and said polymer is formed of
- (a) at least 50% by weight of at least one monomer selected from the group consisting of butadiene and isoprene (monomers a),
- (b) at least 10% by weight of at least one monomer selected from the group consisting of esters of acrylic acid or methacrylic acid and an alkanol having from 1 to 8 carbon atoms (monomers b) and
- (c) from 0 to 10% by weight of other free-radically copolymerizable monomers containing at least one ethylenically unsaturated group (monomers c),
- with the proviso that the total amount of the monomers a) and b) which are polymerized in free-radically polymerized form is at least 90% by weight, with the percentages by weight being based on the total amount of the monomers a)+b)+c) which are polymerized into the polymer.
Dependencies are inferred from the claim text.