JPH0331366A - Synthetic resin composition - Google Patents

Abstract

PURPOSE:To provide the subject composition containing a specific amount of a specific long-chain monoacyl basic amino acid and giving an easily sewable synthetic leather, etc., having slippery coating film surface and excellent abrasion resistance, body and feeling. CONSTITUTION:The objective composition is produced by compounding 0.1-40 pts.wt. (preferably 3-20 pts.wt.) of an N-epsilon-long chain acyl basic amino acid having 8-20C aliphatic acyl group (e. g. epsilon-caproyllysine, epsilon-lauroyllysine or delta- caproylornithine) to 100 pts.wt. of a resin such as polyurethane resin.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to synthetic resin compositions. More specifically, the present invention provides that when synthetic leather or artificial leather is manufactured using resin for artificial leather such as polyurethane resin or vinyl chloride resin as a raw material, it is possible to impart slipperiness to the coating surface and obtain excellent abrasion resistance. The present invention also relates to a novel synthetic resin composition that has improved texture and feel, and can be easily sewn into bags, shoes, etc.

[Conventional technology and problems]

In recent years, resins for artificial leather have been actively developed.
In particular, polyurethane resins and vinyl chloride resins are frequently used as materials for artificial leather. However, although polyurethane resin has excellent film softness and toughness, it lacks surface slipperiness and has problems with abrasion resistance, sewing machine threading (needle movement does not proceed smoothly), etc.

Attempts are being made to solve this problem by selecting raw materials and using them in combination with silicone resins, etc. Depending on the type of raw material, the problem of slipperiness can be improved, but on the other hand, the softness, which is one of the characteristics, is impaired. Furthermore, when a silicone resin is used in combination, the poor adhesion, which is one of the characteristics of silane compounds, appears as a drawback, causing problems in adhesion to the base material of artificial leather.

Various plasticizers are used to adjust the softness of vinyl chloride resin. However, due to the problem of compatibility between the vinyl chloride resin and the plasticizer, the plasticizer oozes out over time (bleeding phenomenon) and the surface becomes sticky, causing the same problems as with urethane resins. In addition, the texture and feel are significantly impaired.

In order to prevent this bleed phenomenon, various plasticizers have been investigated, but no satisfactory one has been obtained yet.
As described above, although each resin has excellent performance as an artificial leather material, the reality is that a resin composition that sufficiently exhibits this performance has not yet been obtained.

[Problems to be solved by the present invention]

An object of the present invention is to provide a synthetic resin composition that imparts sufficient surface smoothness to the above-mentioned artificial leather and has particularly excellent abrasion resistance, texture, and feel.

[Means to solve the problem]

In order to solve this problem, the present inventors conducted intensive research on various derivatives of amino acids, and as a result, added 8-monolong-chain acyl basic amino acids to resins for artificial leather such as polyurethane resins and vinyl chloride resins. The present inventors have discovered that by doing so, the surface slip properties can be improved, and at the same time, good texture and feel can be obtained, and the present invention has been completed.

That is, the present invention provides 100% of the resin component in the resin solution for artificial leather.
0 of 8-mono long chain acyl basic amino acids per part by weight
．． It relates to a synthetic resin composition obtained by containing 1 to 40 parts by weight and then removing the solvent.

Examples of basic amino acids that are constituents of the ε-mono long chain acyl basic amino acid used in the present invention include lysine and ornithine, which may be in either optically active forms or racemic forms. Further, as the long-chain acyl group (fatty acid residue), an aliphatic acyl group (fatty acid residue) having 8 to 22 carbon atoms is used, and specifically, capryloyl, caproyl, lauroyl, myristoyl, valmitoyl, stearoyl, Examples include behenoyl, cocoyl (coconut oil fatty acid acyl), hydrogenated beef tallow fatty acid acyl, beef tallow fatty acid acyl, and the like. Furthermore, a mixture of these acyl groups may be used.

The ε-mono long chain acyl basic amino acid used in the present invention can be obtained by adding a fatty acid chloride dropwise into an alkaline aqueous solution of the above-mentioned basic amino acid.
It can be obtained by a known method such as a BAUMANN reaction method or a method of heating and dehydrating a fatty acid salt of a basic amino acid at a temperature of 100° C. to 250° C. (Japanese Patent Publication No. 51-28610). ε obtained in this way
-An example of a mono-long chain acyl basic amino acid is ε
- capryloyl lysine, ε-lauroyl lysine, ε-myristoyl lysine, e-balmitoyllysine, ε-stearoyl IJ syn, ε-bebenoyl lysine, ε-cocoyl lysine, ε-hydrogenated beef tallow fatty acid acyl lysine, δ-caproyl ornithine, δ-Lauroyl Ornithine, δ-
Examples include valmitoylornithine, δ-stearoyl ornithine, δ-behenoylornithine, δ-tallow fatty acid acylornithine, and mixtures thereof. Although the shape of the ε-mono long chain amyl basic amino acid solid obtained in the present invention depends on the amount of resin applied, it is preferably 100 μm or less, more preferably 20 μm or less. Furthermore, all of these compounds are insoluble in water and various solvents, and are non-irritating to the human body and have excellent safety (Japanese Patent Application Laid-Open No. 61-137812).

On the other hand, the resin for artificial leather used in the present invention includes, for example, polyurethane resins, that is, dry type polyurethane resin solutions, emulsion type polyurethane resin solutions, foamed type polyurethane resin solutions, wet type urethane resin solutions, etc. It may also be a synthetic resin, such as a copolymer of polyacrylic acid, polyvinyl chloride, polystyrene, polybutadiene, etc., or a mixed urethane resin solution. Furthermore,
It is not affected by any processing method, such as dry processing or wet processing, depending on the selection of solvent.

Examples of vinyl chloride resins include plasticizer-added vinyl chloride resins, paste vinyl chloride resins, foamed paste vinyl chloride resins, etc. These vinyl chloride resins can be processed into artificial leather by any normal processing method. No problem. In addition, when preparing the composition of the present invention, the amount to be added can be arbitrarily selected depending on the type of the resin for artificial leather mentioned above and the desired performance. However, in any resin, 0
．． If it is less than 1% by weight, it is difficult to express a remarkable effect;
Adding more than 0% by weight tends to reduce the softness required for artificial leather, and the practical value is 3 to 20% by weight.
The addition of is preferred.

As a method for incorporating an ε-mono long chain acyl basic amino acid into a resin solution, (1) a predetermined amount of 8-
A mono-long chain acyl basic amino acid can be added and easily incorporated using high-speed stirring or a triple roll.

Furthermore, (2) when producing a polyurethane resin, a predetermined amount of ε-mono long chain acyl basic amino acid is added to complete the urethane reaction before completing the urethane reaction such as the chain lengthening step. By using this method, a portion of the resin reacts with the polyurethane resin, improving compatibility and making uniform dispersion possible.

In addition, when the above-mentioned resin for artificial leather is dissolved in a solvent, that is, added to the resin solution for artificial leather to obtain the composition of the present invention, if it is added in an amount of 10% by weight or more based on the resin, as the amount added increases. There is also a possibility that the viscosity increases and the appropriate viscosity required by the molding machine (coating m) cannot be obtained. However, this case can be solved by diluting the resin solution with the same solvent.

[Effects of the present invention]

The natural leather look required for artificial leather, that is, the texture and feel, is improved, and the surface slipperiness and abrasion resistance are also improved, making it easier to mold into shoes, bags, etc., and even furniture,
Applications can also be expanded to new fields such as vehicles.

Example Next, the present invention will be explained in more detail with reference to Examples.

Measurement and evaluation of film performance in Examples were performed in the following manner.

(1) Surface smoothness; friction coefficient measuring device model: KES-5E (friction coefficient tester) KA
TO, TECHCo, LTD measurement conditions Temperature: 24°C Humidity: 53% Load: 50g Sliding speed: 11 weights/sec Contact area: 1d Contact surface Coating x Coating (2) Coating physical properties: Tensile strength Model: Tensilon UTM-4-100 type Orientefuku Co., Ltd. measurement conditions Coating thickness: 30μ Coating width: 10 Tsuru Coating length: 50g (between chucks) Tensile speed
50 m/+sin Example 1 5 kg of 50% 4t% L-lysine aqueous solution heated to 80°C
(17.18 n+oj? as lysine) was gradually added with 3.4 kg (17 mol) of lauric acid, and stirring was continued for 30 minutes. Thereafter, the mixture was cooled to 50 to 60°C, and 10β of methanol was added to precipitate crystals of lysine laurate. After cooling this slurry to room temperature and separating the solid and liquid using a centrifugal separator,
Dehydration condensation was performed at 0°C under reduced pressure for 8 hours to obtain 7.29 kg of 8-lauroyl-L-lysine.

Next, after uniformly dispersing the compound obtained above using three rolls according to the formulation shown in Table 1, apply this dispersed resin solution onto release paper so that the thickness of the film after removing the solvent will be 30μ. Using a knife coater, coat at 80℃ for 5 minutes, then 120℃
The film was dried for 30 minutes in a vacuum cleaner, and the surface slipperiness (friction coefficient), tactility, and physical properties of the obtained film were evaluated.

Example 2 50% lysine aqueous solution 200 g (0,685 mo2)
and stearic acid 194.9 g (0,685 mol)
After mixing, this mixed solution was stirred for 1 hour under reflux. Thereafter, the mixture was allowed to cool to room temperature, and methanol 11 was added to obtain a slurry of lysine stearate. The crystalline portion was separated using a centrifuge, and after replacing with N2 gas, dehydration condensation was carried out at 200° C. under reduced pressure for 20 hours to obtain 242 g of ε-stearoyl-cynolysine. A membrane for evaluation was prepared in the same manner as in Example-1 using this compound in the formulation shown below.

Composition Rankskin 5005 100 parts ε-stearoyl-L-lysine 5 Dimethylformamide 30 Comparative Examples Each of Rankskin 5005.301 used in the example,
A membrane for evaluation was prepared according to Example 1 without adding the compound of the present invention (Rankskin 5005 was used in Comparative Examples 1 and 30).
1 as Comparative Example-2).

Table 2 shows the evaluation results of Examples and Comparative Examples.

Claims (1)

[Claims] At least one type of N_g-mono long chain acyl basic amino acid having an aliphatic acyl group having 8 to 20 carbon atoms is added to the resin 10.
A synthetic resin composition characterized by containing 0.1 to 40 parts by weight relative to 0 parts by weight.