Latex composition

Products such as combined compositions for simultaneous, separate use or staggered in time to prepare a foamed and gelled latex having a density of less than 450 g/l, comprising:

• a) a first product comprising a gelling agent selected from the group of polyether-polysiloxanes,
• b) a second product comprising a vulcanizing agent selected from the group consisting of oxides, mercaptos, sulfenamides, thiurams, thiocarbamates, amines, thiophosphates, thioureas, thiazoles, guanidines, for example zinc bis-dibutyldithiocarbamate (ZDBC), zinc diethyldithiocarbamate (ZDEC), zinc dimethyldithiocarbamate (ZDMC), zinc or sodium 2-mercaptobenzothiazole (MBT or NaMBT), 2,2′-dithiobenzothiazole disulfide (MBTS), N-cyclohexylbenzothiazole 2-sulfenamide (CBS), N-tert-butylbenzothiazole 2-sulfenamide (TBBS), bis-(triethoxysilylpropyl)tetrasulfide (TESPT), tetraethylthiuram disulfide, tetramethylthiuram disulfide (TMTD), tetramethylthiuram monosulfide (TMTM), tetramethylthiuram polysulfide (TMTP), dipentamethylene thiuram hexasulfide (DPTH), dimethyldithiocarbamate (DMTC), N,N′-ethylene thiourea (ETU), 2-(morpholinothio)benzothiazole (MBS), sulfur (S), N,N′-diphenylguanidine, N,N′-di-o-tolylguanidine, oxides of magnesium (MgO), zinc (ZnO), calcium (CaO), barium (BaO), copper (CuO), cerium (CeO), stearic acid (SA), zinc stearate, zinc 2-ethylhexanoate (ZEH), zinc monoglycerolate (Zn-m-glyc), zinc sulfide (ZnS), dibutylamine (DBA), diphenylguanidine (DPG), and mixtures thereof.
• c) a third product comprising a non-ionic foaming agent selected from the group of non-ionic foaming agents consisting of polyglycolated or sulfated fatty alcohol ethers, ethoxylated castor oils, ethoxylated fatty amines, ethoxylated fatty acids, glycerol esters, glycol esters, polyoxyethyleneglycol esters, polyoxyethylene sorbitan esters, sugars esters, condensed alkanolamides, amine oxides, polyethyleneglycols, ethoxylated or non-ethoxylated sorbitan esters, ethoxylated/propoxylated copolymers and mixtures thereof.
• d) a fourth product comprising a latex compound selected from the group of natural latices and synthetic latices and mixtures thereof.

A method of making a latex composition comprising the following steps:

• a) supplying a latex compound selected from the group of natural latices and synthetic latices and mixtures thereof into a mixing vessel,
• b) supplying a vulcanizing agent selected from the group of vulcanizing agents consisting of oxides, mercaptos, sulfenamides, thiurams, thiocarbamates, amines, thiophosphates, thioureas, thiazoles, guanidines, for example zinc bis-dibutyldithiocarbamate (ZDBC), zinc diethyldithiocarbamate (ZDEC), zinc dimethyldithiocarbamate (ZDMC), zinc or sodium 2-mercaptobenzothiazole (MBT or NaMBT), 2,2′-dithiobenzothiazole disulfide (MBTS), N-cyclohexylbenzothiazole 2-sulfenamide (CBS), N-tert-butylbenzothiazole 2-sulfenamide (TBBS), bis-(triethoxysilylpropyl)tetrasulfide (TESPT), tetraethylthiuram disulfide, tetramethylthiuram disulfide (TMTD), tetramethylthiuram monosulfide (TMTM), tetramethylthiuram polysulfide (TMTP), dipentamethylene thiuram hexasulfide (DPTH), dimethyldithiocarbamate (DMTC), N,N′-ethylene thiourea (ETU), 2-(morpholinothio)benzothiazole (MBS), sulfur (S), N,N′-diphenylguanidine, N,N′-di-o-tolylguanidine, oxides of magnesium (MgO), zinc (ZnO), calcium (CaO), barium (BaO), copper (CuO), cerium (CeO), stearic acid (SA), zinc stearate, zinc 2-ethylhexanoate (ZEH), zinc monoglycerolate (Zn-m-glyc), zinc sulfide (ZnS), dibutylamine (DBA), diphenylguanidine (DPG), and mixtures thereof,
• c) adding a vulcanizing agent in said mixing vessel,
• d) supplying a non-ionic foaming agent selected from the group of non-ionic foaming agents consisting of polyglycolated or sulfated fatty alcohol ethers, ethoxylated castor oils, ethoxylated fatty amines, ethoxylated fatty acids, glycerol esters, glycol esters, polyoxyethyleneglycol esters, polyoxyethylene sorbitan esters, sugar esters, condensed alkanolamides, amine oxides, polyethyleneglycols, ethoxylated or non-ethoxylated sorbitan esters, ethoxylated/propoxylated copolymers and mixtures thereof,
• e) adding said non-ionic foaming agent in said mixing vessel to form a foamed and gellable latex,
• f) supplying a gelling agent selected from the group of polyether-polysiloxanes,
• g) adding said gelling agent in said mixing vessel,
• h) supplying and adding a filler selected from the group of fillers consisting of calcium carbonate, magnesium carbonate, silica, titanium dioxide, potassium titanate, glass fibers, talcum, carbon black, feldspar, clays such as kaolin and alkaline alumino-silicate clay, alumina silicate, iron silicate, alumina and magnesia trihydrates, calcium hydroxide and mixtures thereof,
• i) supplying and adding a thickener selected from the group consisting of thickeners based on polyacrylate such as polyvinylpyrrolidone, polyvinyl alcohol, polyacrylates and their salts, on polyurethane, polysaccharide cellulose and its derivatives such as carboxymethylcellulose, hydroxyethyl(or methyl)cellulose, bentonites, natural gums such as those of xanthan, agar, acacia, guar gum, fumed silica and mixtures thereof.
• j) applying said foamed gellable latex on a support or into a mold,
• k) gelling said gellable foamed latex applied to a substrate or in a mold.