Stain preventive treatment process for polyamide fiber

Details Stain preventive treatment process for polyamide fiber Stain preventive treatment process for polyamide fiber

1992-10-01

1994-01-18

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

Chemical modification of textiles or fibers or products thereof

811554, 811565, 81156, 252 86, 252 87, D06M 1008

Patent

active

052796140

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to a treatment process for preventing staining of polyamide fiber, and more particularly to a treatment process to obtain a polyamide fiber material like nylon carpeting having stain-resistant properties.


BACKGROUND ART

Polyamide fiber material like nylon carpeting is susceptible to staining by natural and artificial coloring pigments contained in numerous food and beverages. Thus, when food and beverages are accidentally spilled onto polyamide fiber, the polyamide fiber ends up being stained by the coloring pigment contained in those food and beverages. These stains cannot easily be removed under ordinary laundering conditions. Several efforts have been made thus far to deal with this shortcoming of polyamide fiber. For example, polyamide fibers are treated with fluorine-based or silicone-based compounds. Examples of processes used commercially include adsorbing the formaldehyde condensate of a phenolic compound such as bisphenol S, a sulfonide of bisphenol S or phenolsulfonic acid onto the fiber either by immersion treatment or steaming following application by padding, spraying, or foam coating. There are also processes wherein fluorine-based compounds are applied using similar methods after the initial adsorbing process described above. Although staining by pigment contained in food and beverages can definitely be prevented, according to these processes, when these types of formaldehyde condensates of phenolic compounds are exposed to environments containing acidic gas such as nitrogen oxide gas, the formaldehyde condensates have the shortcoming of turning yellow on the fibers. In addition, when formaldehyde condensates of phenolic compounds are exposed to light, they also have the shortcoming of turning yellow on the fibers. Thus, no satisfactory method exists at present for protecting polyamide fiber from coloring pigment contained in food and beverages.


DISCLOSURE OF THE INVENTION

The present invention provides a treatment process that gives staining preventive effects to polyamide fiber materials like nylon carpeting with respect to stains caused by natural and artificial coloring pigments and enables products that demonstrate minimal discoloration when exposed to acidic gas such as nitrogen oxide gas and similarly demonstrate minimal yellowing when exposed to light.
According to the present invention, a staining preventive treatment process for polyamide fiber is provided which comprises the application of a compound indicated in general formula I below and a compound indicated in general formula II below to the polyamide fiber: ##STR6##
In the above formula, R independently represents --OX, ##STR7## X independently represents hydrogen or alkali metal, and 1 is a number from 3 to 20, provided that 50-70% of R is ##STR8## and the remainder is at least one group selected from --OX, ##STR9##
In the above formula, A represents ##STR10## X independently represents hydrogen or an alkali metal, m is an integer from 2 to 6, and n is 0, 1, or 2.


BEST MODE FOR CARRYING OUT THE INVENTION

In the present invention, the application of the compound of formula I and the compound of formula II to the polyamide fiber may be performed in the same bath or may be performed in separate baths. In addition, when applying the compound of formula I and the compound of formula II in separate baths, either compound may be applied first.
In the compound of formula I, when 1 is smaller than 3, the resulting stain preventive effects are not adequate. When 1 is larger than 20, the product at the time of manufacturing this compound becomes gelled and lacks sufficient water solubility. As a result, its manufacture is difficult. Similarly, when-- --OH as R is less than 50%, the resulting stain preventive effects are inadequate, and when that amount exceeds 70%, the problem occurs that the solubility of the product at the time of manufacture is insufficient.
Although the compound of formula I is typically obtained by a condensation reaction between a phenol compound and formald

REFERENCES:
patent: 4340388 (1982-07-01), Kowalski
patent: 4502986 (1985-03-01), Robson
patent: 4745142 (1988-03-01), Ohwaki et al.
patent: 4964871 (1990-10-01), Reinert et al.
patent: 5009667 (1991-04-01), Beck et al.
patent: 5015259 (1991-05-01), Moss, III et al.
patent: 5030245 (1991-07-01), Hemling et al.
patent: 5131909 (1992-07-01), Hangey
patent: 5190565 (1993-03-01), Berenbaum et al.

Affiliated with

Also associated with

Rating

Stain preventive treatment process for polyamide fiber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stain preventive treatment process for polyamide fiber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stain preventive treatment process for polyamide fiber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1133420