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US 5,512,064 AGranted
Process for modifying and dyeing modified fiber materials
AssigneeHoechst Aktiengesellschaft
InventorsAndreas von der Eltz, Joachim Clauss, Andreas Schrell
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Abstract
Fiber materials are modified with a polyalkyleneimine polymer at crosslinking agent, preferably glyoxal, and optionally dyed with water-soluble, anionic dyes, preferably reactive dyes. The dyeing process with fiber materials modified according to the invention can be carried out low-salt or completely without salt and also alkali-free or using only minimal amounts of alkali.
Claims17
A process for modifying fiber materials, which comprises the steps of:
- mixing a polymer selected from the group consisting of polyethyleneimine having a molecular weight from 500 to 2000 and a polypropyleneimine having a molecular weight from 500 -1000 with a bifunctional crosslinking agent of the formula (II)
- Z--Q--Z (II)
- where
- Z is a group of the formula --CHO or --CH(OR.sup.1).sub.2, wherein R.sup.1 is in each case identically or differently hydrogen or C.sub.1 -C.sub.4 -alkyl, and
- Q is a phenylene group or a group of the formula (--CH.sub.2 --).sub.a, wherein a is from 0 to 4,
- in an aqueous solution to form an aqueous mixture,
- and bringing said aqueous mixture into contact with said fiber material.
4 more elements
A process for modifying fiber materials, which comprises the steps of:
- a) providing a polymer selected from the group consisting of polyethyleneimine having a molecular weight from 500 to 2000 and a polypropyleneimine having a molecular weight from 500-1000,
- b) contacting said fiber with the polymer selected in step a,
- c) providing a compound of the formula (II)
- Z--Q--Z (II)
- where
- Z is a group of the formula --CHO or --CH(OR.sup.1).sub.2, wherein R.sub.1 is in each case identically or differently hydrogen or C.sub.1 -C.sub.4 -alkyl, and
- Q is a phenylene group or a group of the formula (--CH.sub.2 --).sub.a, wherein a is from 0 to 4, and
- d) contacting the fiber with the compound of the formula II.
5 more elements
Dependencies are inferred from the claim text.