| 摘要 |
<p>The parent specification describes a process for the simultaneous creaseproofing and waterproofing of cellulosic textiles. In this, the wet fabric is treated in a bath contg. 5-60 g/l of an organic solvent soluble ehterified aminoplast resin, 5-50 g/l of a hydrogen alkyl polysiloxane, at least 25 ml/l of a polar solvent and at least 1.5 g/l of a dialkyl tin acylate dissolved in a nonpolar water insoluble solvent. Excess of the bath is then removed and the fabric dried to condense the resin. In the present patent, the process is carried out in the absence of polar solvents. Prevents the polar solvent becoming fixed to the textile as in prior art process, which causes a reduction in the polar solvent and enrichment in foreign solvents in the treatment bath, and makes difficult the attainment of an even finishing effect. Suitable solvent soluble amino resisn are dimethylolethyleneurea, dimethylolalkyl (1-5C)-carbamate and hexamethylolmelamineS, highly ehterified with a low alcohol. The nonpolar solvents used may be e.g. hydrocarbons or halogenated hydrocarbons as mentioned in the parent specification. After impregnation, e.g. by foularding, the treated fabric is dried at 80-100 degrees C and then heated at 120-160 degrees C to condense the resin. In an esample, 40g methylated dimethylolethyleneurea, 20g methylhydrogenpolysiloxane and tetrachloroethylene to 11 were mixed with 8g dibutyltindilaurate to form a treatment bath used to impregnate cotton poplin. After drying and heating for 4 mins. at 140 degrees C the fabric had good crease resistance and water repellency.</p> |
