JPS6071769A - Fiber oil agent - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a synthetic fiber oil, particularly to a synthetic fiber treatment oil that imparts antifouling performance (80 functions).

In recent years, in order to expand and stabilize the market for synthetic fibers, the development of differentiated materials that add value to fibers has been carried out in various fields, and various proposals have been made. As a link to this, we focused on imparting anti-slip properties to synthetic fibers, and by performing antifouling treatment at the stage of spinning and drawing the raw material polymer to produce the fiber raw material, or at the stage before spinning the fiber raw material, At the textile product stage, it is possible to produce stain-resistant textile products even for textile products for which stain-proofing treatment is difficult due to the shape of the product or the production process. The present invention relates to a textile lubricant for producing textile raw materials that meet these needs.

Generally, fluorine components are used as antifouling processing agents, but since antifouling treatment is performed during the production process of fiber raw materials,
During the production process, the fibers tend to come apart easily and become difficult to slip, resulting in a decrease in productivity and quality, and in the process of turning the fiber raw material into textile products, especially during the spinning process, spinning failure due to roller wrapping and after the dyeing process. The decline in SG function has become noticeable. In order to prevent these problems, it is important for the treatment agent to have compatibility between the fluorine component and the oil component and to have an affinity for the fibers.In addition to imparting smoothness and convergence to the fibers, an oil agent with low stickiness is required. Ru.

The purpose of the present invention is to improve the productivity of fiber raw materials and the spinning productivity of the raw materials by oiling the fibers at the stage of producing the fiber raw materials, and to improve the productivity of 5G4 with excellent dyeing durability.
An object of the present invention is to provide a textile oil that imparts G-ability.

That is, the present invention contains (A) an ethylene oxide adduct of an alkylphenol, an ethylene oxide adduct of a higher alcohol, an alkali metal salt or amine salt of an ethoxylate alkylphenyl phosphate or an ethoxylate alkyl phosphate, and ethylene oxide in an amount of 50% by weight or more. Alkylene oxide polymer, insoluble in mineral oil, viscosity 20-4000 centistokes (25°C)
14-fold or two or more compounds selected from silicone compounds modified with alkylene oxide of 20 to 5
0% by weight (hereinafter abbreviated as %) and (Pj1) A perfluoroalkyl group-containing vinyl polymer emulsion that is compatible with the prisoner component and capable of forming a dry film with a Rockwell hardness of 40 to 90, such as (a) perfluoroalkyl Group-containing monomer 50-90%, (b) hydrocarbon vinyl monomer 5-90%
30%, (c) hydrocarbon non-conjugated divinyl monomer 0-5
%, (50 to 80% of a polymer emulsion consisting of 5 to 15% of a dl functional group-containing vinyl monomer) is provided.

When used in combination with component (B), the component (N) constituting the present invention is used in the process of spinning, stretching, crimping, and cutting the fiber polymer to produce a fiber raw material. It improves the productivity of fiber raw materials and the quality of fibers by improving the fiber convergence properties in wet conditions. The productivity of the spinning process is improved by the effect of improving the spinning disorder caused by the fibers being wrapped around a part of the spinning roller.It also improves the maintenance of uniformity (compatibility) of the processing agent components. It has action and effect.

The greater the content of the upper N component, the greater the above effects.
If the content is less than 20%, the effect is extremely low and 7i
: It is inappropriate. However, when the content of (N component) increases, the component (13) becomes plasticized, which greatly reduces the SG function, and the SG properties after dyeing are significantly reduced. (The content of the N component in the textile oil agent is preferably about 25 to 65%.

As the alkylphenol of the N component of the present invention, for example, an alkylphenol having an alkyl group having 4 to 12 carbon atoms, such as octylphenol, inoctylphenol, nonylphenol, dodecylphenol, etc., can be used. 22 aliphatic alcohols are preferably used, for example, octyl alcohol, lauryl alcohol, isotridecyl alcohol, cetyl alcohol, behenyl alcohol, etc. can be used, and ethylene oxide (abbreviated as EO) is added to these phenols or alcohols. Add.

The amount added is preferably 10 moles or more. For the phosphate of an ethoxylate compound in which EO is attached to an alkylphenol or a higher alcohol in a ratio of 1, an adduct of 1 mole or more of EO can be used as the ethoxylate compound,
The amount of EO added is preferably 4 moles or more. As the alkali metal salt of the phosphate, salts such as potassium and sodium salts can be used, and as amine salts, amine salts having 2 carbon atoms such as monoethanolamine, monoisoglopanolamine, jetanolamine, and triethanolamine can be used. ~9
Hydroxyalkylamine or ammonia, monomethylamine, etc. can be used.

Alkylene oxide polymers are produced by adding BO to ethylene glycol, propylene glycol, etc.Also, when copolymerizing propylene oxide (abbreviated as Po), the weight ratio of EO added is 50% or more. It can be produced by copolymerization. Examples of alkylene oxide-modified mineral oil-insoluble silicones (modified silicones) with a viscosity of 20 to 4,000 centistokes (25°C) include compounds represented by the following molecular formula: 11, where b and X are 0. ~25 integer, y is an integer from 1 to 1o,
R is any one of C21'k, -CsHa, C4)H8, and R' is H or an alkyl group having 1 to 4 carbon atoms. The modified silicone used in the present invention has a viscosity of less than 20 centistokes (25°C), a viscosity of more than 4000 centistokes (25°C), and a viscosity of 4 f/l.
Oil-soluble ones are unsuitable because they have little effect as described above, and because they plasticize component (B), they impede the effect of component (8), particularly the oil repellency.

The perfluoroalkyl group-containing vinyl polymer emulsion (B) containing X component of the present invention has a perfluoroalkyl group having 4 or more carbon atoms, preferably 6 to 12 carbon atoms, and the Rockwell hardness of the dry film is 40. ~90 and preferably has a molecular weight of about 700 to about 200,000. The polymer must contain all fluorine atoms in the molecule in an amount of at least 100% by weight, and must have antifouling properties.Such a polymer must contain a) 50 to 90% vinyl monomer containing four perfluoroalkyl groups. b) Hydrocarbon vinyl monomer 5-
60C) Hydrocarbon-based non-conjugated divinyl monomer 0-5
%d) Functional group-containing vinyl monomer It can be obtained from 5 to 15 units by a known polymerization method.

The perfluoroalkyl group of component (B) of the present invention is capable of polymerizing with a perfluoroalkyl group having 4 or more carbon atoms, preferably 6 to 12 carbon atoms, in which the hydrogen of a hydrocarbon is replaced with a fluorine atom. Any compound having both an unsaturated chain and a heavy bond may be used. Examples thereof include the following compounds.

C, F, 780. N(C8H7)C,H40COCH=
CH2C,F,,So,N(CH3)C,)I,OCO
CH=CH2C,F, □502NCC,H5)C2H4
0COCCCH3) 2CH.

C7F15 Hz OCOCH=CH2CyF+s
CON (C2H5) C2I (4QCQC(CH3)
=CH2C,F,7C,H40COCH=CH205
F,,CH,0COC(CH3)=CH2CoFto
CsH60COCCH=CH2C,2F,, C,II
, OCOCH=CI(2C,F,,C2H40COC(
CH3)-=CH3C,F,, C411,OCOCH
=CH3C7F,,C00CH=CH2C,F,7('H2C(OH)HC1J20COC(C
H3)=CH2(CF3)2CFOC! In, O0CO
CH=(J(2C,F,(QC2F,)4CON(CH
3) C2H,0COCH=CH2c, Fta S 02
N (C,,H40COCH=CH(2)2C8F,,
SO,N(CH,)C,oH,oCOOCH,CH=C
H.

C,F,7So,N(C,H,)C,)140cOcH
=cHcOOc,H.

C,F,,So,NHC,)I4So,CH=CH2 The hydrocarbon vinyl monomer is an ordinary A (combinable vinyl compound) containing no gold in either the alkyl group substituted with a fluorine atom or the functional group. Any compound may be used as long as it exists.For example, the following compounds may be mentioned.

Methyl acrylate, methyl methacrylate, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate, isoamyl acrylate, methacryl Octyl acid, octadecyl acrylate, octadecyl methacrylate, acrylic moromi lauryl, lauryl methacrylate, cetyl acrylate, cetyl methacrylate,
Acrylic [N, N-diethylamine ethyl, methacrylic acid N, N-diethylaminoethyl, vinyl acetate, vinyl propionate, vinyl caprylate, vinyl laurate,
Vinyl stearate, styrene, α-methylstyrene,
P-methylstyrene, vinyl fluoride, vinyl chloride, vinyl bromide, vinylidene fluoride, vinylidene chloride, allyl heptanoate, allyl acetate, allyl caprate, allyl caproate, vinyl methyl ketone, vinyl ethyl ketone, 1.3- Phtadiene, 2-chloro-1,3-phtadiene, 2,3-dichloro-1,3-butadiene, isoprene, etc.

The hydrocarbon non-conjugated divinyl monomer is a compound containing two polymerizable vinyl groups that do not form a conjugated system, and includes, for example, the following compounds. Ethylene glycol diacrylate, ethylene glycol dimethacrylate, propylene glycol diacrylate, diethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, divinylbenzene, vinyl acrylate, dibromneopentyl glycol dimethacrylate, etc.

The functional group-containing vinyl monomer is extremely effective in maintaining and improving the fastness of the dry film on the fiber, and is preferably a combination of two or more known reactive monomers. is appropriate. The -example and the following compound are included. Acrylic acid, methacrylic acid, acrylamide, methacrylamide, N-methylolacrylamide, N-butoxymethylacrylamide, diaseptone acrylamide,
Methyloldia7ton acrylamide, 2-hydroxyethyl methacrylate, 2-hydroxyethyl acrylate, hydroxypropyl acrylate, 3-chloro-2-hydroxyethyl methacrylate, grindyl methacrylate, and the like.

It is essential that the component (B) of the present invention be compatible with the component (5), and must have a μ of n1 so as to be stably dispersed with respect to the component (5). Therefore, when producing a polymer from the various monomers mentioned above, for example, by the emulsion-Mi synthesis method, the compatibility stability and work stability of the resulting emulsion will differ slightly depending on the single claw, but the existing fiber repellent Higher amounts of emulsifier should be used than with water and oil repellents. Usually, the amount of emulsifier used is 5 or more depending on the amount of total monomer.
It is preferable that the amount is between 10% and 10%. The emulsifier may be nonionic, anionic, or cationic, but it is important to use an emulsifier that is opposed to the above-mentioned prisoner component to make it as jlγ as possible.
It is preferable to keep it in a corner where you can maintain your rivalry. In addition, the Φ) component of the present invention is obtained by subtracting the electric combination ', cBl, ? It can also be uniformly dispersed in the prison component emulsion with or without an emulsifying dispersant.

Component (13) of the present invention should have a desirable hardness such that the final textile product can sufficiently prevent contaminant adhesion, that is, the Rockwell hardness of the dry film is in the range of 40 to 90. Polymers with a Rockwell hardness of 40 or less have poor resistance to crimp contamination.

It goes without saying that it is possible to additionally incorporate other third components into the composition of the present invention without departing from the spirit of the present invention. For example, in addition to the fluorine-containing urethane compound described in 1983-58041, there are also fluorine-containing (poly)ester compounds, fluorine-containing←poly)epoxide compounds, etc. for improving the antifouling function. .

Furthermore, in order to completely increase adhesion and prevent the antifouling component from falling off during the dyeing process, knitting process 6, etc., aminoplast resin,
Examples include polyurethane resins and polyazirinyl compounds.

Others 1 soft smoothing agent, dye fr-1. Additives well known to those skilled in the art, such as pigments, flame retardants, antistatic agents, antistatic agents, etc., can be blended.

The composition of the present invention can be applied to fibers for example from 0.65 to 0.0.
The fiber s4 reamer was spun and rolled by depositing 5 EC amount (III.

Fiber Km in the process of making fiber raw materials by crimping and cutting
In addition to completely improving wet metal smoothness and wet fiber convergence, it also improves spinning failure caused by roller wrapping of fibers caused by the stickiness of processing agents in the spinning process, and furthermore It is an excellent textile oil that can obtain fibers that have the effect of completely improving the SG function.

Hereinafter, the present invention will be explained in detail using examples.

(@) in Examples is all based on the amount of M.

Characteristics 11T and 1 in Examples are based on the following evaluation method. (
1) Friction against metal when wet means that a filament thread lubricated with a treatment agent is wound around a stainless steel cylinder, and the thread is taken up at a speed of 50 i/mi while spraying water with an initial cart of 2 tons.
It is a value representing the frictional force when pulled by n, and 1. The smaller the value, the better the metal smoothness in wet conditions. (
2) Wet fiber friction means that a filament yarn lubricated with a treatment agent is run at an initial load of &20 g at a speed of 30 m/min, and while water is sprayed on the yarn, the filament yarn is fully in contact with the yarn. , is a value calculated from the thread tension before and after the contact between the threads, and the larger the value, the better the convergence of the fibers when wet. (3) Adhesive strength refers to the dry skin of the treatment agent.
After standing for 48 hours at 80% RH, the peeling rate per unit contact area between the rubber sheet and the treatment agent film at 90°C was 1'jl.
The smaller the value, the smaller the viscosity ff, f[lE of the processing agent. (4) Water repellency refers to a mixture of inpropyl alcohol and water (20
80) liquid? Gently apply the quotient on the sample surface, observe the shape of the droplet, and determine the time until the droplet shape disappears.If the time is 3 minutes or more, it is passed (good), if it is less than 6 minutes, it is rejected. ). The sample was treated with a treatment agent (dry) A''(100'C for 5 minutes) and heat treated (130℃) on a synthetic woven fabric.
2 minutes). (5) Oil repellency means AA
Based on the TCCl 1.8 method, a droplet of the standard solution was gently placed on the sample surface, and the entire shape was observed after 30 seconds.
Achieved the highest grade that does not penetrate droplets. The larger the number, the
Indicates good oil repellency. The sample used was one prepared in the same manner as in the case of water repellency.

Oil repellency Standard solution 1st grade Mineral oil 2nd grade Mineral oil + hexadecane (65%/35%) 3rd grade Hexadecane 4th grade Tetradecane 5th grade Dodecane 6th grade Decane 7th grade Octane 8th grade Hebutane (6) staining means that all samples are as follows. For recipe A, 130℃6
After 0 minutes of treatment, reduction cleaning () at 80°C for 20 minutes.Idrosulfite 29/, 71i! , caustic soda 11, nonionic surfactant 11/A) It, then soaked at 60°C for 20 minutes, washed with hot water,
Washing with water, drying (100℃ for 5 minutes) (130℃)
2 minutes). The sample used was one in which the treatment agent was fully adhered to polyester tack, dried (100°C for 5 minutes), and set (160°C for 2 minutes).

/ Example 1 680 ml of deoxidized pure water was placed in a glass 11-four flask equipped with a thermometer, stirrer, condenser, and nitrogen blowing tube.
g, acetone 120.9. n-decyl mercaptan 0.
2g, azobisinbutyramidine dihydrochloric acid 0.1g, C
,F,,So,N (CH3) C,H,OCOC(C
H,) diCH, 140g, methyl methacrylate 20,
9.2-ethylhexyl methacrylate 10 g, ethylene dimethitafurylate 4.9. 10 g of N-methylol acrylamide, 1 part of 2-hydroxyethyl methacrylate
0', 9. 6 g of glycidyl methacrylate was charged and thoroughly emulsified and dispersed by stirring under a nitrogen stream.

Thereafter, the temperature was gradually raised and the copolymerization reaction was carried out at 70°C for 8 hours while stirring gently. (Component B-1) The conversion rate of the copolymerization reaction was 990%. The Rockwell hardness of the dry film of this copolymer at 100°C is 85.
Met. The compatibility test with the above component (Al) was conducted under severe conditions, such as applying mechanical shearing force at high temperatures and examining the compatibility.

11 Add 100 g of the above copolymer emulsion, 25 g of a 20% aqueous solution of ethoxylate (n=7) octyl phosphate potassium salt, and 875 g of pure water to a beaker.
While stirring slowly, gradually raise the temperature to 90℃.
keep it. After performing the mixing process for 3000 rpm x 2D minutes using a mixer, the amount of aggregate generated was examined and found to be 0.1 g.

Examples 2 to 5 Examples 2 to 5 were prepared by the same copolymerization reaction operation as in Example 1.
, the copolymerization reactions of Comparative Examples 1 to 3 were carried out, and the respective component B
-2, B-3, B-4, B-5, B-6, B-7, B
-8 was obtained.

Rockwell hardness and compatibility were investigated in the same manner as Example 1, and the results are shown in Table 1.

The composition of the copolymer listed in Table R is as follows.

(%) (%) (%) (%) (o/su) (%) (%) Table - Examples 6 to 15 The total solid content of the treatment agent was adjusted to 0.6% for polyester filament yarn 150d48f. Table 2 shows the results of evaluating the wet friction against metal using the thread attached to the polyester taffeta, and the water repellency and oil repellency using the polyester taffeta. The ingredient composition of the treatment agent in the table was as described below.

A-1 ethoxylate) (n=15) octylphenol A-2 ethoxylate) (n=IS) nonylphenol A
-3 ethoxylate (n=50) lauryl ether A-
4 ethoxylate (n=1) lauryl phosphate potassium salt A-5PO/EO copoly-v-(PO/ko=
50150. M11V5000) Table 2 Examples 6 to 15 have excellent wet metal smoothness, water repellency,
While they have excellent oil repellency, all of the comparative examples have drawbacks as shown below. Comparative Examples 4 to 6, in which the content of component (A) is high, have low wet friction against metal, but have poor water and oil repellency, and Comparative Examples 7 to 8, in which the content of component (B) is high, have low friction against metal when wet. , it is unsuitable because the friction against metal in wet conditions is high, resulting in poor smoothness.

As seen in the above Examples and Comparative Examples, the treatment agent having the composition ratio of the present invention has good lubricity when wet due to low friction against metal when wet, and has excellent oiliness. It exhibits excellent effects as a treatment agent for SG polyester fibers.

Examples 16-20 Component A-5 (POEO
The performance of a treatment agent composition in which the PO/EO copolymer was replaced with a PO/EO copolymer in which only the ratio of PO and EO and the molecular weight were changed was evaluated. The results are shown in Figure 3. The following compound was used as a substitute component for A-5.

PO/EO ratio Molecular weight of copolymer A-625/75 6000 A-725/75 12000 A-8207803000 A-90/100 (SOOO A-100/100 20 [] A-1175/25 1200 A-1210010750 Table 3 Examples 16 to 20 have low wet friction against metal and high wet friction against fibers, so they exhibit excellent lubricity and fiber convergence effects, and have excellent water repellency and oil repellency. On the other hand, Comparative Examples 9 and 10, which used alkylene oxide polymers with low EO content of less than 50%, are unsuitable because they all have defects in oil repellency. There is.

Examples 21 to 29 Table 4 shows the results of evaluating the performance of alkylene oxide modified silicone (modified silicone) as a treatment agent when the mineral oil solubility and viscosity changed using polyester filament 150c148f and polyester taffeta. . The following component compositions of the processing agents in the table were used.

A-13 ethoxylate (n=11) Nonylphenol A-14 ethoxylate (n=2o) Cetyl ether A
-15 ethoxylate (n=3) octyl phosphate diisopropanolamine A-16PO/KO copolymer (PO/EO, -25/75, MW200 [1) A
-1;/& silicone, viscosity 20 centistokes (
25℃) Mineral oil soluble A-18 modified silicone, viscosity 20
Centistokes (25°C) Mine 4 Insoluble A-19 modified silicone, viscosity 200 centistokes (25°C) Mine'I 11 + Insoluble A-20 modified silicone, viscosity 400
centistokes (25°C) Mineral oil solubility Examples 21 to 291d, the adhesive force is small, so when the spinning roller accumulates heat and reaches a high temperature during spinning production, it is caused by the adhesiveness of the fiber treatment agent. This shows that the winding of the delicate material around the roller is improved. It also shows that the decrease in oil repellency after dyeing has been improved. Comparative Examples 11 to 14 have low wet friction against metal, but this is because the modified silicone in the treatment agent component has oil solubility that dissolves in mineral oil, and because the alkylene oxide has low EO content and becomes oil soluble. , which impairs the oil repellency of the treatment agent and increases adhesive strength, indicating that it is unsuitable.

Examples 60 to 36 Table 5 shows the results of evaluating the performance of the treatment agent of Example 27 on nylon and acrylic fibers.

Examples 30 to 36 in Table 5 show that the treatment agent of the present invention exhibits excellent effects on wet friction properties, water repellency, and oil repellency even on nylon, acrylic fibers. It is shown that.

Component B-1 in the treatment agent components of Example 28 was added to dry skin 11
FiP evaluation of treatment agents substituted with fluorine components having different hardnesses of Φ was conducted. The results are shown in Table 6. As a substitute for the processing agent component B-1 in Example 28, the following instant preparation was used.

Example 2B'B-1 (50%) 37 B-1/B-3 (10%/4o%) 38 B-5
(50%) 39 B-37B-5 (20%/3o%) 40 B-3
/B-5 (40%/10%) 41 B-3, /B-8(
40%/1o%) Comparative Example 15 B-1/B-8 (10%
/40%) 16 B 37B 6 (10%/40%)
17'B-5/B-6 (40%/1o%) 18 B-<
S/B-8 (30%/2o%) Table 6 Items 2 A, B, and C in Table 6 indicate the amount of treatment agent deposited.

A201%, B-03%, C-05% Examples 37 to 41 show that the loss of 80 functions due to staining is improved. On the other hand, Comparative Examples 15-1
No. 8 indicates that it is unsuitable due to drawbacks such as a significant decrease in water and oil repellency after dyeing and a tendency for the tackiness of the processing agent to increase.

As is clear from the above Examples 1 to 41, the treatment agent of the present invention has excellent mutual compatibility between the treated components, and the fibers to which the treatment agent is attached have excellent wet-to-metal and wet-to-fiber friction. This processing agent improves productivity and quality by improving lubricity and fiber convergence in the fiber raw material production process, and also prevents fibers from wrapping around spinning rollers due to stickiness. It can also be seen that the decrease in water repellency and oil repellency after dyeing is improved.

Procedural amendment (voluntary) June 2b, 1980 Mr. Manabu Shiga, Commissioner of the Patent Office 1. Display of 15 items 1982 Patent Order No. 174361 2, Title of invention textile oil agent 3, Comparison with the case of the person making the amendment Related Patent applicant: 35-58 Sakashita, Itabashi-ku, Tokyo 174 (28
8) Dainippon Ink & Chemicals Co., Ltd. Representative: Shigeru Toshige Kuni 4, Agent Address: 3-7-20 Nihonbashi, Chuo-ku, Tokyo 103 Dainippon Ink & Chemicals Co., Ltd. Telephone: Tokyo (03) 272-4511 (Dainippon Ink & Chemicals Co., Ltd.) Representative) 6
, Contents of amendment ill ill mw Page 3, line 10, ``Production process has undergone antifouling treatment'' (2) Page 18, line 11, ``)''
Correct the one with ")" as "J".

(3) "Ethylene dimethitafurylate" on page 21, line 9 is corrected to "r-ethylene dimethacrylate."

(4) "Octyl osephate potassium" on page 22, line 6 is corrected to "octyl osephate potassium."

(5) "2-ethylhexyl acrylate 30" on page 25, line 3 of the same page is replaced with "2-ethylhexyl acrylate 30".
25,” he corrected.

(that's all)

Claims (1)

[Scope of Claims] L (A) Ethylene oxide adduct of alkylphenol, ethylene oxide adduct of higher fluorol, alkali metal salt or amine salt of ethoxylate alkylphenyl phosphate or ethoxylate alkyl phosphate, 50% by weight or more of ethylene oxide in total 20 to 50% by weight of one or more compounds selected from the alkylene oxide polymer contained, a silicone compound insoluble in mineral oil and modified with an alkylene oxide having a viscosity of 20 to 4,000 centistokes (25°C); 50 to 80% by weight of a vinyl polymer emulsion containing a fluoroalkyl group (poorly compatible with the Al component, capable of forming a dry film with a Rockwell hardness of 40 to 90)
A textile oil consisting of. 2. The perfluoroalkyl group-containing vinyl polymer emulsion of component (B) contains (a) perfluoroalkyl group-containing monomer 50-90
Weight% (b) Hydrocarbon vinyl monomer 5-30% by weight
(C) Hydrocarbon non-conjugated divinyl monomer 0 to 5% by weight
(The textile oil agent according to claim 1, which is a polymer emulsion comprising 5 to 15 M% of vinyl monomer containing a di functional group.