Patent GB-1076259-A (GB)
Title: Siloxane condensation polymers
IPC: C09K23/54
Filed: 1964-06-25
Abstract: A water-soluble, heat-hardenable polymer is made by reacting an organopolysiloxane containing at least one unit of the formula <FORM:1076259/C3/1> in which R is an alkyl radical of 1-3 C atoms or a phenyl radical, and the alkylene radical contains from 1 to 5 C atoms, with an aliphatic, cycloaliphatic or heterocyclic diamine or polyamine, or an alkylene imine or a corresponding amine salt, and stopping the reaction while the product, on being acidified and then diluted with water, is still capable of forming a clear to opalescent solution. The reaction is usually effected at 50 DEG C. for half an hour, and if desired in the presence of a water-miscible solvent. Formic or acetic acid is generally used for neutralization or acidification.  The polymers may be further reacted, under weakly acidic conditions, with an aliphatic aldehyde to yield polymers which can cross-link with themselves or with materials containing reactive hydrogen on heating above 100 DEG  C. without the use of a hardening agent.  In a typical example (1) a mixture of an epoxidized siloxane comprising <FORM:1076259/C3/2> units, methanol and ethylenediamine, was heated at 45-50 DEG  C. for 20 minutes and the product was acidified with acetic acid and water added to yield a clear solution. Uses: in making bonding and adhesive agents for the wood and paper industry; for making water-repellent and dye-fixing compositions for textiles; and as emulsifying or dispersing agents for numerous organic and inorganic compounds.  In examples, (10) the siloxane of Example 7 is used for emulsifying a mixture of paraffin and polyethylene waxes; (11) the aldehyde-modified siloxane of Example 7 is used for emulsifying a hydrogen-siloxane; (12) the siloxane of Example 7 is used in the copolymerization of the acrylate ester of perfluoroctane sulphonic acid-N-ethyl-N-hydroxyethylamide and N-methylolacrylamide, to yield a colourless, cloudy gel dilutable with water; and (17) the siloxane of this example is used for emulsifying polyacrylic acid methyl ester.ALSO:Silica obtained by hydrolysis of ethyl silicate is emulsified in water using as emulsifier a polymer produced by reaction of an epoxidized siloxane of formula <FORM:1076259/C1/1> where alkylene is -CH2CH2- with diethylene triamine.ALSO:A water-soluble, heat-hardenable polymer, obtained by reacting a siloxane containing at least one unit of the formula: <FORM:1076259/B1-B2/1> in which R is an alkyl radical of 1-3 C atoms or a phenyl radical and the alkylene radical contains from 1-4 C atoms, with an aliphatic, cycloaliphatic or heterocyclic diamine or polyamine, or an alkylene imine or a corresponding amine salt (see Division C3), is used as an emulsifying or dispersing agent to form, in Examples (7) a paraffin wax emulsion, (8) an emulsion of perfluoroctane sulphonic amide, (9) an emulsion of perfluoroctane sulphonic acid-N-ethyl-N-hydroxyethylamide, (13) W\sv-dihydro-W-hydroperfluorononylalcohol, and (15) a chlorinated paraffin wax emulsion.  Other dispersible or emulsifiable substances mentioned are - saponifiable fats and oils and their free acids; soaps of such acids with polyvalent metals; paraffin hydrocarbons; dyestuffs; fluorinated alkanes and their alcohol ester, carboxylic acid, sulphonic acid, isocyanate, sulphonamide and carboxylic acid alkylene imide derivatives; and chelates of fluorinated carboxylic acids with alcoholates of polyvalent metals and complexing agents such as acetylacetone.