DE2160518A1 - Process for the production of moldings from acrylonitrile polymers - Google Patents

Description

Wi> C08f / 152 542. Rig no. There 161/71 A 17.4 / 1184

Process for the production of moldings from acrylonitrile polymers

The invention relates to a method for producing fibers . Threads . Films and similar moldings made from heat-softenable aorylnitriloopolymeriaaten.

It is known that the deformation of aoryl nitrile copolymers Disadvantages arising from solutions - e.g. high use of solvents and the associated necessity to circumvent a costly solvent recovery that one Aorylnitriloopolymerisate with synthesized a high proportion of at least one cocomponent, which acts as an internal plasticizer - s «B« aliphatic or Alioyolisohe alkenes or acrylic acid esters and that you then these products without the addition of solvents processed to moldings in an extruder at elevated temperatures. You can do a follow-up treatment obtain high strengths.

The key deficiency of the moldings produced naoh this method is that SI® in the relaxed state at relatively low temperatures (below 100 Sohon ⁰ O) - extremely strong and brittle sohrumpfea there - especially in the presence of water. The reason for this is the considerable lowering of the aliasing transformation point caused by the co-component, a physical criterion for a potential disorientation of the molecular association.

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Han has therefore continued - and with success - tried to adjust the proportion of cocomponents in the polyaorylnitrile malacule just so high that an awakening to a higher temperature does not occur and the humiliation dee (Uaemwandlungepuaktes remains sustainable, but that β ο hon small amounts of an external plasticizer sufficient to give the product a thermoplastic behavior The substances usually used as polyaorylnitrile solvents can be used as external Weiohmaoher Extruder su moldings are processed, which are treated and freed from the Weiohmaoher »rather cheap meohanlsohe

Have your own & sohaftan. For example, it is possible to use this method to produce aoryl triloopolymer threads, the hinniohtljoh tearing and solemn festivities are not related to the poIyeeterfttden

With diftseaa procedures - from an economic point of view - not possible more Weiohmaoher lost - assuming no recovery - than with the nooh industrial solution spinning processes used today; nevertheless, for hygienic reasons a processing of these - mostly toxic - aids are not required. Thus, in the end, sloh does not report any significant profit compared to the mentioned lu-

The invention is based on the object of a method for the solvent-free deformation of Aorylnitriloopolymerie & th, the production of door bodies with favorable mechanical properties, especially of pairs and threads with good textile physical properties Codes, allowed.

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It has been found that the object can be achieved surprisingly easily if aoryl nitride copolymers with a sufficiently high proportion of at least one component, which functions as an internal plasticizer, are mixed with small amounts of a polymer, which is a potential thread former, at 100 to 300 ⁰ O is softened and hard to crystallize, and this molten solution is deformed in the heat on an extruder. This creates crystalline structures in the molecular structure, which act as a fixing matrix for di «aorylnitriloopolymer molecules and prevent excessive relaxation of these molecules, even at higher temperatures.

Suitable additional polymers are, for example, isotactic poly » propylene, polyamides, polyesters or their mixtures. Your amount shouldn't exceed $ 20, otherwise the let us question the economic effect of this procedure.

It has also proven advantageous to use other polyolefins such as polyethylene, polybutylene-1 and poly » methylpentene and polyformaldehyde as a component of the mixture to use·

The prepared according to the process catfish according to the invention th moldings, e.g. threads and fibers, have excellent textile-physical properties, which - depending on the case Type and proportion of the crystallizable mixture » component - can be varied in an extraordinary variety of ways and thus open up a wide range of products »

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Their tendency is still advantageous, naoh a speci = fischen aftertreatment for additional tensile stress

, so that ihar use is also in the Spl1tfi * ser $ tifo1 # tet. In addition, according to this procedure, it is dia.f

feg «possible to produce threads, namely v * nnn nozzle openings are used accordingly when deforming the polymer mixture.

The invention will be explained in more detail by the following examples.

Baiapiel

8 * 5 parts of Ines Aorylnitrll-Isobutylen-Copolymerisates with an isbutylene content of 18.7 pig, a reading = vie ^ oßitöt η , m 1.38 and a Sehmelariakoeitfit // ^ ₀ ⁰ measured under standard conditions at 230 ^{0 O} * ¹ ^ 350

Pole *, were was mixed with 15 parts polypropylene whose Sohmel «°> viscosity η 'go ^0" 2 515 poise, mixed and molded using an extruder at 230 ⁰ C to chips. The Sohnitzel obtained had a SohmelKVisko & ity ^ ■ 230 ° * ^ ^ ⁰⁰ poise. They were measured with a spinning extruder, the spinning head was at a temperature of 230 ⁰ C under _9. use of a 14 Looh nozzle (diameter of the bores

"0.5 mm) spun into threads with a delay of 1:45.

After 5faohen hot scattering and the usual aftertreatment, the following properties resulted? Filament denier »9.2 denier, tensile strength« 4.5 p / d «n, Elongation at Break - 28 lbs

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BAD ORIGtNAL

Example 2s

To 80 parts of the used in Example 1 acrylonitrile-isobutyl * n-3optt! Ymerißatii8 wuräen 20 parts of polypropylene having a Sohmelzvlakoaltät V l _n o · 2 515 · Poifife hineu = NaOH was added and intensive Vermlsohung at 230 ⁰ G means an "extruder to Sohnitzeln deformed · The chips whose Sohmelzviskosität η 230 ° * ² ^ * poise bet call. were formed into piles with the aid of a spinning extruder at a spinning head temperature τon 240 ⁰ C using a 24 Looh nozzle (Loohduröhme> 0.4 mm), a 7-BUg clay 1:35 being selected. A total scattering factor * 6 was used for the subsequent tear-out scattering. The threads obtained had the following text / physical indicators! Blementarfadentlter * 6.2 denier, tensile strength »5.1 p / den, elongation at break * 22 $ ·

example

SIn GemJsoh, consisting of the anrylonitrile-Iwobutylen-Copolymerisat used in Example 1 and polyamide 12 with a SohmelsTiekosltat f \ J> 3q ° " ² ^ ⁸⁰ i * ⁰³ · ⁰ » »was ^{deformed at 195 0} C by means of an extruder The Sohmelzviekoeltät der Sohnit * el was 8 805 poise. They were ^{spun at a spinning head temperature of 215 0} C su threads, a 14 Looh nozzle (Looh diameter 0.5 mm) was used and the draft was 1:60 «The 6.5-fold hot-twisted threads had the following characteristics: Slementarfadentlter: 5.2 denier, tensile strength * 6.8 p / den and elongation at break · ■ 19 56 ·

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BAD OftjQlNÄL

85 l? Tjlle Ans λ "Baispiel 1 batyltn-CopolymerisateB wurdtn with 15 parts. Polyamide 12, whose Sohmelfnrii & feositB.t f) JUqö · 2 730 poise, inni ^: vermieoM «ad with the help of slnee Bxtruders to shredded Y * rfo: mt, dl · e.ia * SobmellzTdiifcaaität η JUqO ■ 8 OSO poise and * flowing on a spinning extruder using a 14 Lo3h nozzle (Loahdurohmeaeer 0.5 mm) cu

Terspoonen The spinning head ^{temperature was 0} C and the capacity was 1 t 50

the Pädea the following properties: awbäÄft * n aufü! ter ■ 7.4 den, fieiflfeetlgieit ■ 6.0 p / den, addition * 20 %>,

75 T ".il *" ines JLorylnitrf.l'-l8obutyl "3a-3opölTiuft" r4 (9ii @ it "e with Iβobutylengeba.lt ton Id ₉ 5 I * e" t ^ _s *: ln * r tiöfi-an ^ sYf »·»

^ " 1 ^ 7 and eiu * rter standia" aräbedbedingungen "a SQt>w4iil" Tielt: o * iitftt η £ - "o" ■ 15,960 Poles were with 75 T ": V1"% Polyllthylen, deesea Sohmelsvlie | 1rc " £ (itftt η, | ^ ο ^ β 3 100 ίο .. ".». * B * tr'ig, T ^ VAiJsobt ^M Aad ait help a Bxtsri · ^ dt na b «5 20 '$ ^ ¹ ) au SoimHeela deformed · The Soh & it: * «! b« » «Eat * SohmelsYiekottitllt Ton \ J ₃₀ o _Q · * 5 210 iai # *. she

& J "fc Ai. ^^ m spinning extruder, the spinning head of which had a temperature of £ 35 ⁰ C, using a ribbon nozzle with a cap of 50 mm and a gap position τ of 1.2 mm xu of a flake film.

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BATH ORIGINAL

Example 6?

2Iu 75 parts of the aorylnitrile-bob'atyl «a-3opo2.ymeriBÄtee mentioned in Example 1 were given 25 parts of polyformaldehyde with a Sohmelrvlskosität * 1 J ₀₀ ο _β · 7 546 poise hl &, after, intensive mixing at 160 ⁰ G

An extruder formed into chips. They S <st.h »i tz * l, whose Sohmelsvlskosltät ^ ^ qo _Q - 12 115 poise9 were with the help of a spinning extruder at a spinning head temperature of 215 ⁰ C and a draw ratio of 1327 to pad * η deformed The threads were then subjected to a Heluverstriokung and a total of 5faoh stretched, mechanically crimped and cut into fibers

The threads obtained had the following partially physical properties Properties * Slement thread denier ■ 12.7 denier, bite strength »4.18 p / den, bite elongation ■ 26 $ ·

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SAD ORIGINAL

Claims (6)

Claims; 1. Process for the production of fibers, threads,. Sheets and similar moldings made of acrylonitrile polymers that can be obtained with heat by shaping the polymers on an extruder and then scattering the primary products, characterized in that the aoryl nitrile copolymers before extrusion throw 0.5 to 50 H> of polymeric substances, which are thread-forming for the sieve alone Have properties, melt between 100 and 300 ⁰ C and solidify in crystalline form. P. 2. The method according to claim K, characterized in that Isotactisoh.es polypropylene is used as the polymeric substance 3. The method according to claim 1, characterized in that linear polyamides are used as the polymeric substance. 4. The method naoh Anspruoh 1, characterized in that linear polyesters are used as the polymeric substance. 5. The method naoh Anspruoh 1, characterized in that the polymer · substance used is polyethylene. 6. The method according to claim 1, characterized in that that polyformaldehyde is used as the polymeric substance will. 209832/1132 BATH ORIGINAL