JPS6157671A - Melt adhesive for adhering fiber - 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 Field of the Invention The present invention relates to a weld bonding layer based on polyester amide, suitable for adhering fibers to each other or to other adhesives.

PRIOR ART AND PROBLEMS The hitherto known hot-melt adhesives based on dimeric fatty acids or b-touch adhesives based entirely on caprolactam do not fully meet the current cost requirements with respect to their properties and scope of use. However, only a poor adhesion effect can be obtained.

Means for solving the problems The object of the present invention is: a)1. Dimerized fatty acids containing 70-100% by weight of dimeric fatty acids and optionally 2. Monocarboxylic agents as viscosity modifiers (chain terminators) (with the exception of a) 1. and 2. and b) one or more aliphatic unbranched codicarbon atoms having 6 to 13 carbon atoms. 81 (In that case a) 1. and 2. The ratio of the carboxylic acids according to b) to the carboxylic acids according to b) with respect to carboxylic groups is from 0.05:1 to 5:1) and C) carbon atoms in practical equivalents to the acids mentioned under a) and b). 6 to 12 aliphatic unbranched di-primary diamines and d) caprolactam and/or ε-amicazolonic acid (
The carboxyl group of the acids listed in ka) and b) 1
per mole cabrolactam and/or C-aminocaprone M O, using 5 to 2.5 mol), and e) caprolactone and/or hydroxycaproic acid (
using from 0.05 to 1.0 mol of caprolactone and/or ε-hydroxycagulonic acid per mol of cabrolactam or aminocaproic acid mentioned in @d), where the first Polyesters produced by reacting dimerized fat α (component a) in one step with Kanakura or one part of caprolactam and/or ε-aminocaproic acid (component d) and in a second step with other components. Amide is used, melt viscosity 25-60
A melt adhesive for bonding fibers based on polyesteramide with a pressure of 0 Pa, 5 (measured at 220° C.).

b) Sebacic acid as kodicarboxylic acid according to C
Hexamethylene diamine is used as the diamine component according to ), the ratio of carboxylic acids according to a) to carboxylic acids according to b) is from 0.1:1 to 6:1, and in the case of polyesteramides, as mentioned under a) and b) Acid carboxyl 2! , ￥: Use 0.8 to 2 units of caprolactam per mole, in this case, use glolactam and/or ε-amitsukagron per mole of caprolactone and/or ε-
It is advantageous to use a polyester amide together with ~0.5 mol of human roxicaglon ao,i.

For the production of the polyesteramides used according to the invention, it is advantageous to use dimerized fatty acids according to a) which contain more than 901f% of dimerized fatty acids.

The melt adhesive according to the invention, which is prepared on the basis of readily available dimeric fatty acids, cabroctam or ε-amitsukazolonic acid, caprolactone or ε-hydroxycagulonic acid, diamines and cozocarboxylic acids, has a This is partly due to its good stability against halodanized hydrocarbons and at the same time against cleaning fluids even at 95°C. This stability is characterized by: 1) a very good initial tear strength, i.e. before loading with a washing or cleaning process, and 2) a very high wet tear strength, i.e. in the wet state after Ynn; and 3. A large number of wash-textures are represented by the desired tear strength after drying, which is re-obtained after the cleaning cycle.

The use of two fatty acids in combination with fish oil results in a melt adhesive having an improved color number.

On the other hand, it is also possible to produce special-purpose melt lubricants by using commercially available fatty acids that have been combined industrially. It is only pointed out that when using dimeric fatty acids for single-portion use, the maximum limit for trimeric fatty acids must not be exceeded.

This limit value depends on the respective inclusion of the two gaseous and 1 μf H' fatty acids of the combined fatty acids and can be ascertained by preliminary tests which are simple procedures common to the average expert.

The expression ``Nina 6 dimerized fatty acids'' generally refers to polymerized acids obtained from ``fatty acids''.The expression ``fatty acids'' refers to unsaturated natural and synthetic basic aliphatic acids with a carbon number of 12 to 22, preferably 18. Nos. 1443938 and 1443, which include
968, West German Patent Nos. 21'18702 and 1280852 full).

Typical commercially available polymeric fatty acids have the following composition: Single iT1 acid (Mo) 5-15i:bi
:% knee tg/body acid (Di) 60-80
/'Tri-JF acid (Tri) 10-35
//Niriki 1・The physical strength of the enemy can be increased up to 100% by the commonly known distillation method.

Regarding the polyester amide according to the present invention, as commercially available, trimeric fatty acids (2 to 61% by weight) and monomeric It is advantageous to use difluorinated fatty acids with a fatty acid content of (0 to 1.5 mft%).It is also possible to use difluorinated fatty acids in their hydrogenated form.

The polyesteramides according to the invention lie within a certain melt viscosity range, which represents a certain molecular range.

Adjustment of the melt viscosity can be carried out in a known manner by stopping the reaction at the desired degree, or alternatively by working with carboxylic acids or amines. Since these methods have certain drawbacks, it is preferable to use monofunctional or monofunctional compounds (amines or carboxylic acids) as interlocking stoppers.

Monocarzanoic acid has proven particularly useful in this case.

The 'J1t of the monocarboxylic acids optionally present in the polymerized fatty acids used according to the invention is such that the monocarboxylic acids are added up to 50 units per unit of total carboxyl groups of the mixture of fatty acids and monocarboxylic acids of the polymer. It can be improved by adding it. A must-have chain stopper (
viscosity modifiers), where the proportion of monocarboxylic acids is high, polymeric monocarboxylic acids, such as oleic, stearic, linoleic, linoleic, or mixtures thereof, such as tall oil fatty acids or soybean oil. It is advantageous to use fatty acids or other hydrophobic monocarboxylic acids.

Examples of aliphatic unbranched kodicarboxylic acids of 6 to 1 carbon atoms which are used according to the invention include adipic acid, nonamethylene dicarboxylic acid, decamethylene dicarboxylic acid and brassylic acid. These dicarboxylic acids can be used alone or in mixtures.

In place of carbagic acid, its ester with a lower alcohol may be used in some cases.

In this case, especially when the proportion of ester is high, it is recommended to start by adding 1 cup of caprolactam in water.

Regarding the aliphatic unbranched di-primary diamine having 6 to 12 carbon atoms which can be used in the present invention, for example, 1,6
-Diamino-hexane, 1.9-diaminononane, 1.
12-diaminododecane is mentioned.

The amount of caprolactam per mole of carboxyl groups of the acid used as well as the lactam/lactone ratio depend on the desired high melting point. Unless the polyesteramide melt adhesive is used as a fiber adhesive, the amount of lactam is 0.5 to 2.5 mol per mol of the carboxyl group of the combined fatty acid and codicarboxylic acid, and the lactone button is 1 mol of lactam. # 0.05 to 1.0 mol. The materials to be bonded are fibers, possibly siliconized materials, which can be bonded together.

The polyester amide used according to the invention can actually be prepared at a temperature of from 200 to 290°C, especially at 25°C.
It can be prepared by heating 6 mol.

Polyesteramides, like polyamides, can optionally also be produced in a two-stage process.

Thus, in the first step, the dimerized fatty acid (component a) and its amyl-forming fat conductor are condensed with caprolactam and/or ε-amitsukagulonic acid (in whole or in part). In this case, the reaction can be easily controlled by using an initial low temperature (i.e. about 150' Dlr). To bring the reaction to an end, the temperature is raised to an unnecessarily low temperature.
The quantitative ratios of the reaction components of the process vary depending on the desired degree of addition of aminocaproic acid or caprolactam.

In a second step, the necessary other components are added to the reaction product and the reaction is terminated in a manner customary for the production of amides.

Bathing agents or diluents may be used to facilitate the performance of the reaction.

The bath melt viscosity of polyesteramide according to the invention is generally 2
It is 25 to 600 Pa, s when measured at 20°C.

The measurement of this value is based on the Kofler Bank (Koflθr-B5
1nk) as follows: Finely ground polyesteramide powder with a particle size of 0.6 to 0.51111 was spread on a Koffler bank. The paper strip was then pressed within the softening range and after 90 seconds was gradually pulled away from the cold side of the Koffler bank. At that time, Koffler Bank and pull at a certain temperature limit! A piece of polyesteramide thread is formed between the paper and the paper. This temperature limit is defined as the softening point.

Manufacture of adhesive made of polyester/wool (55/45%) Width 5 c
m strips of material were glued together. The polyesteramide powder had a particle size of 300-500μ. Application needle is material 177
It was 20g per Lg.

The coated strip of material was bonded to a second, uncontacted strip of material at a temperature approximately 20-60° C. above the softening point of the polyesteramide adhesive. The bonding time was about 15-20 seconds and the bonding pressure was 4009/cm''.

Washing-and-cleaning treatment using a 6%-flowing liquid of commercially available machine detergent at temperatures of 6 U and 9
Washed at 5°C. Washing step at 60°C for 45 minutes, 9
At 5°C it was 90 minutes. Rinse the cleaning grogram.
and a centrifugation step.

DIN (West Germany 1 chestnut standard) for test materials at room temperature when wet
53274 peel strength test. However, the width of the test piece was 5 cIn. Chemical cleaning was performed with 1 L perchlorethylene for 30 minutes at room temperature.The 67f7 cleaned test material returned to 1111 when wet again.

In the polyesteramides listed in the following table, the following synthetic fatty acids were used: Example 1.2.4.5.7.9 Ditjt tall oil fatty acid with the following composition: monomeric fatty acid (Mo ) 3.6 base weight
/l (Di) 94.2 #trimer /l (Tri) 2.2 /'Example 3
．． 6.8.10 Diincorporeal olein with the following composition: Monomeric fatty acid (Mo) 5.3J11 dianimal fatty acid (Di) 96.3 Trilayer // (Tri) 1 .4 11
Example 1 In a reactor equipped with a downward condenser, a stirrer and a thermometer, dimerized tall oil fat [V 27.02.9° tall oil fatty acid 18.00 #, adipic acid 57.70 y 1 sebacic acid 79. 85 & (a) Ratio of carboxyl groups according to 1 and 2 to codicarboxylic acid according to b) - 0.1: 1.0)
, 1,6-diaminohexane ID 1.051. Kaglolactam 178.54. F (0.9 mol of caprolactam per mol of carboxyl group according to (a) and b)) and 18.01 mol of caprolactone, F (salt ratio of caprolactam:caprolactone -1: 0.1) were charged, and 2 mol of caprolactam was added under nitrogen. It was heated to 250° C. within hours and kept at this temperature for 7 hours. A vacuum of 2111 L of mercury was applied during the last 4 hours. The polyesteramide obtained had the following values: Softening point: 123°C Melt viscosity at 220°C: 57.1 P
a, s Peel strength (kg15cm): 2.9 (60℃
- Cleaned product, wet tear) Peel strength (kfi 115 cm): 5.1 (Velchlorethylene cleaning, wet tear): 58 The polyester amides listed in the following table were produced in the same manner.

Table 2 Example 6 Dimerized tall oil fatty acid 55.77.9, stearic acid 9
．． 83.9, sebacic acid 92.999(a) 1 and 2
Ratio of carboxyl group of fatty acid mixture according to and codicarboxylic acid according to 'F3) = 0.25:1.0), 1,6
- 66.86 g of diamitzhexane.

Caprolactam 207.92! ' 1.6 mol of caprolactam per mol of carboxyl group according to (a) and b)) and 26.229 mol of caprolactone (molar ratio of cabrolactum:cabrolactone 1.0:0.125)
t-charged and heated to 250° C. for up to 2 hours under nitrogen,
It was held at this temperature for a further 7 hours. For the last four hours, I set up an A sky with two mercury columns. The polyesteramide had the following values: Softening point: i2o'c 220° C. Melt viscosity: 58. OPa,s Peel strength (ki915cm): 3.5 (60'D
-Cleaned items, wet tearing) Peel strength (k!?15α): 4.5 (perchlorethylene cleaning, wet tearing) Initial value ()C! 915m): 6.1 The polyesteramides listed in the following table were produced in the same manner.

Claims (1)

[Claims] 1. Melt viscosity 25 to 600 Pa·s (measured at 220°C)
A hot-melt adhesive for gluing fibers based on polyesteramide having: a) 1. a dimerized fatty acid containing 70-100% by weight of dimeric fatty acids and optionally 2. a viscosity modifier; Monocarboxylic acid as (chain terminator) (in which case a) up to 50 equivalent % of the total carboxyl groups in the mixture of 1, and 2 may be derived from the monocarboxylic acid) and b) number of carbon atoms one or more aliphatic unbranched codicarboxylic acids of 6 to 13, the ratio of the carboxylic acids according to a) 1 and 2 to the carboxylic acids according to b) with respect to the carboxyl group being 0.05:1 ~5:1) and c) aliphatic unbranched diprimary diamines having 6 to 12 carbon atoms in practical equivalents to the acids mentioned under a) and b) and d) caprolactam and/or ε-aminocaproic acid (
In this case, 0.5 to 2.5 mol of caprolactam and/or ε-aminocaproic acid are used per mol of carboxyl group of the acids mentioned in a) and b)), and e) caprolactone and/or hydroxycaproic acid (
in which 0.05 to 1.0 mol of caprolactone and/or ε-hydroxycaproic acid are used per mol of caprolactam or aminocaproic acid mentioned in d),
In this case, if appropriate, the dimerized fatty acids (component a) are reacted with all or a part of caprolactam and/or ε-aminocaproic acid (component d) in the first step and the other components are reacted in the second step. A melt-melt adhesive for bonding fibers, characterized in that it may use polyesteramide produced by reacting with other components.