CN101215791A - Method for producing cation modified polyurethane color stabilizer - Google Patents

Abstract

The invention discloses a modified polyurethane color fixing agent of basic ion, which is prepared by PEG600, PPG2000, TDI, DMPA, methyl ethyl ketone, calcium trisodium diethylenetriamine pentoacetate, epichlorohydrin, acetone, isopropanol, sodium bisulfite, water and glacial acetic acid. The process for preparation comprises polyurethane prepolymerization reaction, modified chain extending reaction, blocking reaction, emulsion reaction, removing solvent and the like. The modified polyurethane color fixing agent of ion of the invention can form net-shaped cross bonding with woven fabric, and the invention adopts sodium acid sulfite to be blocking agent, which guarantees that when in application, enough isocyanate bonds are supplied to form chemical crosslinking with hydroxyl group and carboxy group with cloth surface, the invention improves various color stabilities of dyed fabric, meanwhile, the invention keeps soft hand feeling of fabric.

Description

The production method of cation modified polyurethane color stabilizer

Technical field:

The present invention relates to a kind of a kind of textile finish and preparation method of the present invention relates to, reactive film-forming color fixing agent of particularly a kind of textiles and preparation method.

Background technology

Color-fixing agent is a requisite auxiliary agent in the textile dyeing processing, and it can effectively improve every COLOR FASTNESS index of textiles, and is particularly to fabrics such as cotton, polyester-cotton blend, silk, brocade wheel, nylon, particularly important.Be to use dicyandiamide class color-fixing agent at first,,, limited use owing to itself contain the formaldehyde of non-environmental protection as the color fixing agent Y of Shanghai the Temple of Heaven auxiliary reagent factory; What use was maximum at present is polyamines class color-fixing agent, color-fixing agent CY-2305 as the Zhejiang development of evil in febrile disease, belong to the environment-friendly type aldehyde-free colour stabilizer, there is excellent effect in this product team to cotton, the activity of polyester-cotton blend, every fastness of direct dyeing, but acid dyeings such as the dark fabric of spy and silk, brocade wheel, nylon are not had great effect.

Summary of the invention

The object of the present invention is to provide a kind of do wetly rub that fastness is good, the production method of all good cation modified polyurethane color stabilizers of washing fastness.

Technical solution of the present invention is:

A kind of cation modified polyurethane color stabilizer is characterized in that: the raw material by following weight portion is made:

40～60 parts of PEG600

120～180 parts of PPG2000

27～28 parts of TDI

5～6 parts of DMPA

120～180 parts of butanone

8～10 parts of diethylenetriamines

8～9 parts of epoxychloropropane

40～60 parts in acetone

20～30 parts of isopropyl alcohols

2～3 parts of sodium hydrogensulfites

380～420 parts in water

1～2 part in glacial acetic acid.

The Chinese of related substance is in the mentioned component:

PPG: polypropylene oxide dihydroxylic alcohols

PEG: polyethylene glycol oxide dihydroxylic alcohols

TDI: Toluene-2,4-diisocyanate, 4-vulcabond

DMPA: dihydromethyl propionic acid.

A kind of production method of cation modified polyurethane color stabilizer is characterized in that: comprise the following steps: successively

(1) polyurethane prepolymerization reaction:

The polyethers 2000 (being PPG2000) that adding calculates the weight in the reactor of drying, polyethers 600 (being PEG600) mixture are at 95～105 ℃ of decompression distillation 1～1.5h, be cooled to 80 ℃ of TDI then, and keep reaction temperature between 80～90 ℃ with separatory funnel dropping metering;

(2) modification chain extending reaction:

In advance diethylenetriamine is dissolved in the butanone, at room temperature splashes in the above-mentioned performed polymer and react, add the water of 35～40 weight portions, be warming up to 52～55 ℃, reacted 20～40 minutes, drip epoxychloropropane again, be warming up to 68～72 ℃ of reactions 2～4 hours;

(3) capping:

Be cooled to 3～5 ℃ at above-mentioned polymer, add isopropyl alcohol and acetone, added the sodium hydrogensulfite capping again 1～3 hour;

(4) emulsion reaction:

Regulate the pH value to neutral with glacial acetic acid, add deionized water and be emulsified into emulsion;

(5) desolventizing:

Under decompression distillation,, promptly get cation modified polyurethane color stabilizer with the solvent removal in the above-mentioned emulsion.

Ion modification polyurethane color fixing agent of the present invention by introducing triethylene diamine as modification chain extender and epichlorohydrin reaction, has formed the polyamines structure with unsaturated ethylene linkage, can form cross-linked network with textiles; Adopt sodium hydrogensulfite as end-capping reagent, guaranteed when using, to have the hydroxyl of enough isocyanic acid ester bonds and cloth cover, carboxyl to form chemical crosslinking; By the combination of the two, improved every COLOR FASTNESS of DYED FABRICS, simultaneously, keep the feel of fabric sofetening.

The invention will be further described below in conjunction with embodiment.

The specific embodiment:

Embodiment:

1. polyurethane prepolymerization reaction

In the reactor of drying, add polyethers (2000) (being PPG2000) 150 grams, polyethers (600) (being PEG600) 50 gram mixtures at 100 ℃ of decompression distillation 1～1.5h, remove the moisture of trace in the polyether polyol.After vacuumizing end, be cooled to 80 ℃, add 5 gram DMPA, after the dissolving that stirs, drip 27.5 gram TDI with separatory funnel, and keep reaction temperature between 80～90 ℃.

2. modification chain extending reaction

In advance with 8 the gram diethylenetriamines be dissolved in 100 the gram butanone in, leave standstill at 1 o'clock after, at room temperature splash in the above-mentioned performed polymer, reacted 2 hours, and added 35-40 gram water, be warming up to 53 ℃, reacted 30 minutes, and dripped epoxychloropropane 8.1 grams, be warming up to 70 ℃ of reactions 3 hours.

3. capping

Be cooled to about 4 ℃ at above-mentioned polymer, add 25 gram isopropyl alcohols and 50 gram acetone, add 10% aqueous solution of 2.34 gram sodium hydrogensulfites, capping 2 hours.

4. emulsion reaction

Regulate the pH value to neutral with 1.2 gram glacial acetic acid, add deionized water 360-365 gram and be emulsified into emulsion

5. desolventizing

Under decompression distillation,, promptly get cation modified polyurethane color stabilizer with the solvent removal in the above-mentioned emulsion.

That niter cake that the present invention adopts is as end-capping reagent, and the deblocking temperature is 50 ℃, and is easy to use, and fabric is through after the fixation treatment, and dried fastness to wet rubbing and soaping fastness are good, and be soft.

The present invention and other color-fixing agent comparing result are as follows:

The comparison of table and other color-fixing agent colour fixation

	Production company	Dry fastness/level	Fastness to wet rubbing/level	Staining fastness/the level of soaping	Feel	Formaldehyde
							Color-fixing agent A color-fixing agent B the present invention	The Temple of Heaven Zhejiang, Shanghai development of evil in febrile disease day becomes chemical industry	4-5 4-5 4-5	3-4 3-4 4-5	4 4 4	Soft firmly	Have or not nothing

Last table colour fixation of the present invention is as can be seen done, fastness to wet rubbing and soaping fastness be good, and feel is also soft, and effect is better than other product.

Annotate: 1, dried fastness to wet rubbing fastness: GB/T3920-1997

2, soaping fastness: GB/T3921.1-1997

3, formaldehyde: GB/T2912.1-1998. first aqueous extraction method.

Claims (2)

1. cation modified polyurethane color stabilizer, it is characterized in that: the raw material by following weight portion is made:

40～60 parts of PEG600

120～180 parts of PPG2000

27～28 parts of TDI

5～6 parts of DMPA

120～180 parts of butanone

8～10 parts of diethylenetriamines

8～9 parts of epoxychloropropane

40～60 parts in acetone

20～30 parts of isopropyl alcohols

2～3 parts of sodium hydrogensulfites

380～420 parts in water

1～2 part in glacial acetic acid.

2. the production method of the described cation modified polyurethane color stabilizer of claim 1 is characterized in that: comprise the following steps: successively

(1) polyurethane prepolymerization reaction:

The polyethers 2000 that adding calculates the weight in the reactor of drying, polyethers 600 mixtures are cooled to 80 ℃ of TDI with separatory funnel dropping metering then, and keep reaction temperature between 80～90 ℃ at 95～105 ℃ of decompression distillation 1～1.5h;

(2) modification chain extending reaction:

In advance diethylenetriamine is dissolved in the butanone, at room temperature splashes in the above-mentioned performed polymer and react, add the water of 35～40 weight portions, be warming up to 52～55 ℃, reacted 20～40 minutes, drip epoxychloropropane again, be warming up to 68～72 ℃ of reactions 2～4 hours;

(3) capping:

Be cooled to 3～5 ℃ at above-mentioned polymer, add isopropyl alcohol and acetone, added the sodium hydrogensulfite capping again 1～3 hour;

(4) emulsion reaction:

Regulate the pH value to neutral with glacial acetic acid, add deionized water and be emulsified into emulsion;

(5) desolventizing:

Under decompression distillation,, promptly get cation modified polyurethane color stabilizer with the solvent removal in the above-mentioned emulsion.