Latex compositions

Claim 2

A process of producing a high solids latex foamable to a stable froth which comprises polymerizing 100 parts by weight of a monomer mixture of (a) 30-100% by weight of an aliphatic conjugated C 4 -C 8 diolefin and (b) 0-70% by weight of at least one copolymerizable compound, said monomer mixture being emulsified in less than 140 parts by weight of an aqueous phase containing less than 6 parts by weight of (A) a polymerization promoting emulsifier system consisting of (1) an alkali metal salt of an alkyl sulfate, alkoxyalkyl sulfate or alkoxyalkyl phosphate having a critical micelle concentration from about 0.002% to about 0.15% or (2) an alkali metal salt of sulfosuccinic acid or an amine derivative of sulfosuccinic acid having a hydrocarbyl substituent attached to an oxygen atom or a nitrogen atom, or a partial alkali metal salt of N-alkyl beta imino dicarboxylic acid, said salt (2) having a critical micelle concentration from about 0.01% to about 1.0% and (B) from about 0.001 to less than 0.1 part by weight of a water dispersible agglomerating system comprising the reaction product of a polyoxyalkylene glycol having a molecular weight of at least 5,000 with the polyepoxide obtained by reacting epichlorohydrin with a polyhydric phenol, said reaction product having a molecular weight of about 15,000 - 20,000, said polymerization being carried out to at least 65% conversion to form a stable fluid latex and concentrating said latex to a solids level of at least 55%.

Claim 3

The process according to claim 1 in which the monomer mixture consists of 50- 90% by weight of butadiene-1,3 and 10-50% by weight of at least one compound selected from styrene, alphamethyl styrene, vinylidene chloride, acrylonitrile, methacrylonitrile, methyl methacrylate and mixtures thereof.

Claim 4

The process according to claim 1 in which the monomer mixture consists of 50-90% by weight of butadiene-1,3 and 10-50% by weight of a mixture of 70-99.5% by weight of a compound selected from styrene, alphamethyl styrene, vinylidene chloride, acrylonitrile, methacrylonitrile, methyl methacrylate and mixtures thereof and 0.5-30% by weight of a second copolymerizable compound selected from olefinically unsaturated carboxylic acid and olefinically unsaturated carboxylic acid amides.

Claim 5

The process according to claim 1 in which 60-100 parts of aqueous phase are employed.

Claim 6

The process according to claim 1 in which the agglomerating agent has a molecular weight of about 15,000 - 20,000 and is the reaction product of a polyoxyethylene glycol of molecular weight of about 6,000 with the polyepoxide obtained by reacting epichlorohydrin with 2,2-bis-(4-hydroxy phenyl)-propane.

Claim 7

A high solids latex foamable to a stable froth comprising at least 55% by weight of non-volatile material dispersed in an aqueous phase in the form of latex particles, said material being essentially a high molecular weight synthetic polymer of a monomer mixture containing 30-100% by weight of an aliphatic conjugated C 4 -C 8 diolefin and 0-70% by weight of at least one copolymerizable compound, said aqueous phase containing (A) less than about 6% by weight, based on the weight of the polymer, of a polymerization promoting emulsifier system comprising a member selected from the group consisting of (1) an alkali metal salt of an alkyl sulfate, alkoxyalkyl sulfate or alkoxyalkyl phosphate, said salt (1) having a critical micelle concentration from about 0.002% to about 0.15% and (2) an alkali metal salt of sulfosuccinic acid or an amine derivative of sulfosuccinic acid, said acid having a hydrocarbyl substituent attached to an oxygen atom or a nitrogen atom, or a partial alkali metal salt of N-alkyl beta imino dicarboxylic acid, said salt (2) having a critical micelle concentration from about 0.01% to about 1.0%, and (B) from about 0.001 to less than 0.1 by weight, based on the weight of the polymer, of a water dispersible agglomerating system comprising the reaction product of a polyoxyalkylene glycol having a molecular weight of at least 5,000 with the polyepoxide obtained by reacting epichlorohydrin with a polyhydric phenol, said reaction product having a molecular weight of about 15,000 - 20,000.

Claim 8

A high solids latex foamable to a stable froth comprising at least 55% by weight of non-volatile material dispersed in an aqueous phase in the form of latex particles, said material being essentially a high molecular weight synthetic polymer of a monomer mixture containing 30-100% by weight of an aliphatic conjugated C 4 -C 8 diolefin and 0-70% by weight of at least one copolymerizable compound, said aqueous phase containing (A) less than about 6% by weight, based on the weight of the polymer, of a polymerization promoting emulsifier system comprising a member selected from the group consisting of (1) an alkali metal salt of an alkyl sulfate, alkoxyalkyl sulfate or alkoxyalkyl phosphate, said salt (1) having a critical micelle concentration from about 0.002% to about 0.15% and (2) an alkali metal salt of sulfosuccinic acid or an amine derivative of sulfosuccinic acid, said acid having a hydrocarbyl substituent attached to an oxygen atom or a nitrogen atom, or a partial alkali metal salt of N-alkyl beta imino dicarboxylic acid, said salt (2) having a critical micelle concentration from about 0.01% to about 1.0%, and (B) from about 0.001 to less than 0.1 by weight, based on the weight of the polymer, of a water dispersible agglomerating system comprising the reaction product of a polyoxyalkylene glycol having a molecular weight of at least 5,000 with the polyepoxide obtained by reacting epichlorohydrin with a polyhydric phenol, said reaction product having a molecular weight of about 15,000 - 20,000.

Claim 9

A high solids latex according to claim 6 in which the monomer mixture consists of 50-90% by weight of butadiene-1,3 and 10-50% by weight of at least one compound selected from styrene, alphamethyl styrene, vinylidene chloride, acrylonitrile, methacrylonitrile, methyl methacrylate and mixtures thereof.

Claim 10

A high solids latex according to claim 6 in which the monomer mixture consists of 50-90% by weight of butadiene-1,3 and 10-50% by weight of a mixture of 70-99.5% by weight of a compound selected from styrene, alphamethyl styrene, vinylidene chloride, acrylonitrile, methacrylonitrile, methyl methacrylate and mixtures thereof and 0.5- 30% by weight of a second polymerizable compound selected from olefinically unsaturated carboxylic acids and olefinically unsaturated carboxylic acid amides and mixtures thereof.

Claim 11

A high solids latex according to claim 6 in which the agglomerating agent is the reaction product of a polyoxyethylene glycol of molecular weight of about 6,000 with the epoxide obtained by reacting epichlorohydrin with 2,2-bis-(4-hydroxy phenyl)-propane.