| 摘要 |
An ink solvent consists of: (A) from 0 to 5% by weight of NaOH, KOH or NH4OH; (B) from 2 to 10% of sodium polyphosphate, sodium laurylsulphate (CH3(CH2)10CH2OSO3Na) sulphated alcohols commercially known as "lauryl alcohol" and consisting of 15% mixed C8 and C10 alcohols, 40% C12 (lauryl or dodecyl) alcohol, 30% C14 (myristyl or tetradecyl) alcohol and 15% mixed C16 and C18 (cetyl, stearyl and eleyl) alcohols; (C) from 0.3 to 10% of a non-ionic surface-active compound defined by the formula R-O(R1)-R11, where R stands for alkyl, aryl and arlkyl radicals, R11 is hydrogen or a group similar to R, R1 is an alkoxy radical having up to 5 carbon atoms in the chain and is an integer ranging between 1 and 50. The following are examples of compositions found effective in the practice of the invention:- Example I.-1% NaOH, 5% CH3(CH2)10CH2 OSO3Na, 1% p-phenylphenol polyoxyethylated with 20 moles of ethylene oxide, 93% water. Example II.-2% NaOH, 5% Na3(PO4), 1% sulphonated castor oil, 92% water. Example III.-4% NaOH, 9% lauryl-alcohol, 4% sulphonated linseed oil, 83% water. |
