Condensation products of formaldehyde resin precon

专利名称：Condensation products of formaldehyde

resin precondensates with polyacetals

发明人：HENSHALL ALBERT EWART,JONES GWILYM

THOMAS

申请号：US24494762申请日：19621217公开号：US3278470A公开日：19661011

摘要：Acetal condensation products are obtained by reacting a water-soluble orwater-dispersible formaldehyde resin precondensate with a water-soluble or water-dispersible polyacetal derived from an aldehyde containing less than 10 C atoms and apolyethenoxy compound containing at least 2-OH groups. The precondensates arederived by interaction of H.CHO with a compound containing the group -CNH2 or thegroup where X is O, S or NH, e.g. urea/formaldehyde and melamine/formaldehydecondensates, dimethylol urea, trimethylolmelamine, hexmethylol melamine,

dimethylolethylene urea, 1:3-dimethylol -5- -(b -hydroxyethyl)-hexahydrotriazin-2-one,the dimethylol derivative of glyoxal monoureide, the tetramethylol derivative of glyoxaldiureide, the corresponding ethyl ethers and water-soluble or water-dispersiblecondensation products. The polyacetals used may be made by known methods, e.g. asdescribed in U.S.A. Specification 2,968,581, from aldehydes, e.g. formaldehyde,acetaldehyde, propionaldehyde, butyraldehyde and glyoxal, and polyethenoxy

compounds such as polyoxyethylene glycols, ethylene oxide condensates of glycerol andtheir monoesters with fatty acids, ethylene oxide condensates of primary amines and

their derived quaternary ammonium salts, and ethylene oxide condensates oftriethanolamine. The reaction between the precondensate and polyacetal, usually inamount of from 0.1 to 5 pts. of the former per part (by wt.) of the latter, is effected byheating, preferably in the presence of an acid-reacting catalyst, e.g. ammonium chloride,ammonium thiocyanate or zinc nitrate. Examples 1, 4, 5 and 6 describe the preparation ofthe polyacetals and Examples 2, 3, 7 and 8 describe the preparation of the polyacetalcondensation products in situ on synthetic fibres (see Division D1).ALSO:Antistaticproperties are conferred on textile materials by forming an actual condensation productin situ, e.g. by impregnating the textile material with an aqueous solution or dispersion ofthe corresponding reactants and an acid-reacting catalyst, drying and baking, e.g. at 100DEG to 210 DEG C., the impregnated material to insolubilize the resin. The actualcondensation product is made from a water-soluble or-dispensible formaldehyde resinpre-condensate (viz. an aminoplast pre-condensate) and a water soluble or-dispersiblepolyacetal derived from an aldehyde containing less than 10 C atoms and a polyethenoxycompound containing at least 2-OH groups (see Division C3). Examples 2, 3, 4 and 8describe the above treatment of polyethylene terephthalate and nylon continuousfilament fabrics. U.S.A. Specification 2,968,581 is referred to.

申请人：IMPERIAL CHEMICAL INDUSTRIES LIMITED

更多信息请下载全文后查看