Process for improving the dyeability and whiteness of cellulosic fabrics
AssigneeThe Dow Chemical Company
InventorsRobert T. Patton, John D. Kitchens, David M. Hall
Life of this patent
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Abstract
In a process for treating a cellulosic fabric which includes the step of scouring and/or bleaching the improvement which comprises treating said fabric with a quaternary compound of the formula selected from the group consisting of: ##STR1## wherein R, R', R" and R"' are each lower alkyl radicals and X.sup.- is an anion prior to dyeing so as to improve its whiteness and/or dyeability.
Claims9
A process for improving the whiteness of a cellulosic fabric which comprises the steps of:
- A. scouring said fabric in an aqueous sodium hydroxide solution so as to remove natural fats and oils;
- B. treating said fabric from step A with steam;
- C. removing excess sodium hydroxide solution from said fabric;
- and then,
- D. treating said fabric with an aqueous solution with an epoxy compound of the formula:
- ##STR3## where R, R' and R" are each lower alkyl radicals and X is an anion whereby the whiteness of said fabric is improved.
A process for improving the whiteness of a cellulosic fabric and improving its receptivity to anionic dyes which comprises the steps of:
- A. scouring said fabric in an aqueous sodium hydroxide solution so as to remove natural fats and oils;
- B. treating said fabric from step A with steam;
- C. removing excess sodium hydroxide solution from said fabric;
- and then,
- D. treating said fabric with a bleaching solution containing epoxypropyl trimethylammonium chloride, whereby the whiteness of said fabric is improved.
Dependencies are inferred from the claim text.