DE1569592A1 - Self-supporting foils and self-adhesive strips - Google Patents

Description

PR. ILSE RUCH 1RR9592

PATENT Attorney I £ 3O333

MUNICH 5 .'.- ■ - ..

REICHENBACHSTR. 51
TELM 32 51

Ä / 4708

ALLIED GH ^ IXCAI, CORPORATION

Met * York, H.Y., U, S.A *

Self-supporting foils and self-adhesive strips

The invention relates to self-supporting films from a chlorinated linear polyethylene and the vervjendurig of such chlorinated linear polyethylene as a carrier for Ssifostklefoa strips.

Ss Tont kl © strips generally consist of a pressure-sensitive adhesive on a plastic film as a carrier. Basically, electrical insulating tape * is used for which a} 3and was previously used on a cast base j [currently made from vinyl with a vinyl carrier *

The production of Seltet adhesive strips is insofar niob * simply, all of their quality and behavior

BAD ORlGlNAL ₁ 0 g _{8 1} s / τ 9 2 9

Use high requirements. electrical tape must be used by the. Underwriters ^p Laboratories for electrical tape stipulated nuns (UL 510) met. It is already known to use chlorine-containing polymers as a carrier for electrical insulating tape, but so far only ylnylchloridpolyraerisate input Ln have found the technology for this purpose. The polyvinyl chloride used for the production of such tape, however, contains mostly JO parts and usually considerably less than the local WeiclHnachern per 100 parts of the vinyl polynizate. " and the Vfeiohnuohes »converts easily from the backing to the adhesive, thus impairing the adhesiveness of the tape.

According to the invention, a new chlorinated linear polyethylene with a low content of plasticizer is used for the production of self-adhesive strips, and the self-adhesive strips produced with it retain their good effectiveness over a longer period of time. The new self-adhesive strips have excellent3 properties and in particular meet the standards of the Underwriters * Laboratories for electrical insulating tape. The new chlorinated polyethylene has in Zusats of not more than 10 percent .-- ^ softening all the characteristics _s are necessary "to the Norman Underwriters Laboratories to meet ^one for thermoplastic tape ^ and has also

109816/1929 BAD

good flame resistance and excellent conformability and flexibility {"conformabiliijy" and "handle" } *

The subject of the invention is therefore a self-supporting film made of a chlorinated linear polyethylene, which is characterized by "that the chlorinated linear polyethylene has a chlorine content of 40 ± 3 wt." measured diireh t Biff © r4mt-ialaaalsrße # has one GlEsÜfear of -5 Ms * 15 ^e C and an intrinsic viscosity of 1 * 0 1.8 dl / g in o-Diohlox »b3nzol bsi 100 ⁰ G,

the invention is still the use of a such chlorinated linear polyethylene as trilger for Selostklefes strips.

Bio Polrlan and self-adhesive strips or invention are cheap b@sitr.en excellent fiber resistance, low water absorption, good resilience and elasticity! Hydration disease j. auseiehostes elel: trieahes

ynd well-balanced physical properties at both low and high temperatures. The tape is extremely easy to attach to its attachment tag ^ m * iss © ns!; §3ß.ö @ templisiert Fo & m miu Is good VQX't-riglioh lait-

_BA 0 OWOtHAt 1098 16/1929

usually for such self-adhesive strips. used glue so that an excellent performance is obtained. Glue itself viieäs ?. ^{7 separates} from the back of the carrier. The new chlorinated polyethylene of the invention is particularly well suited for use in electrical insulating tape «because it is at low. or no plasticizer content at all, not only good flame resistance, but the whole subtle complex of properties? having;" whose Zusammsnwirken fäliigksit the desired Ansohmiegungs- "and gives flexibility · ISSI This behavior; swar nieht quantitatively measurable" but very v e sent Ii Gh ₉ demit such a tape by the consumer is good aufgenoinraan It is linked with the BLegsmoöul, dor.

/ in the cold
the cold cracking temperature, dex » GIi temperature, the tensile modulus _{# of} the elastic recovery /, the creep; elongation and tensile strength, however AUOH will not exactly be detected, _we nn all these Eigerschäften be sen gefflf ^.

The crystallinity of the chlorinated polyethylene of the invention can best be described as "residual" crystallinity, that is, as it "holds" the original polar crystallinity in pros: ent, since it is difficult to establish an absolute "measure of crystallinity" especially those who are so low «ic fcoi dam preferred J'rodulr'i of 7 '

1 0981B / 1929

BATH

One can, however, tear out the area of the curve of the differential thermal analysis of a sample of the starting polyethylene at about the melting point and compare this area with the ¹ under the curve of the balanced polyethylene obtained in the same way.

The absolute value of the crystallinity of the chlorinated polyethylene can be estimated * if the crystallinity of the starting polythylsxis is determined according to an absolute method, determined by H ^ nt-genEuialyee after _a which heat treatment, the prob © imterworfea vjurde and r ,. see FrUffeeehnik was engewanclt * The from the curves of fchenaisohen DIfferenfeialanalyse for the residual crystallinity of the chlorinated polyethylene receive new NEN BsiatiTTWörte, ie, 5 - 20% of the original Kristallini did correspond to an absolute value of the Polyäthylenkristallini did γόη about 5 - 15%,

The residual crystalline oil of the chlorinated polyethylene, with asinsRi chlorine content, is related to pus narrow baroich for the glass transition apparatus ύοά approximately = * 5 to * 15 ° G * The ßlasüfeergangtempöratur> © ine ubergangstempdrf & u? second order, is bosfciniint by plotting the Stsifheitsraadul © insr sample as a function of the temperature «and can be defined

109816/1929

alfa ciejenlgö Ssnspax'aturj bsi the stiffness jaoclul of the sample has the value 1 ^ 15 % ■ ¹ JO psl or 1ir dyn / οπΓ »The stiffness can be determined according to ASTM D1053-61. The value for the Restkristamnität of 5 - 20% of the _s a Glasübsrgangstemperatur - 5 yields to + 15 ^e C, is necessary in a Chiorgshalt of about ^ O% so that the desired flexibility and at the same time AnschffiiegimgsfähigkeJ.t DefonaationsbestSndigkeit under Balastur-g which is better than prescribed by the Underwriters' Laboratories Stand ^^ ds.} - in particular a deforination limit, which corresponds to a decrease in thickness of not more than 50% , is achieved. In addition, a chlorine content of about 40 is necessary so that the adhesive adheres well to the carrier and to the material: one good Piasan strength and good fourth for flexural modulus and cold cracking temperature.

The chlorine content of the chlorinated polyethylene must not exceed the stated 40 % by more than 3% by weight * because in chlorinated polyethylenes with Goringer residual crystallinity the glass transition temperature at a chlorine content of about 30 - 35 % increases rapidly with the chlorine content _a, i.e. by about 1 * 5 - 3 ⁰ C per 1 % change in the chlorine content _/ changes. A polymer having a high glass transition temperature of about 15 ⁰ C et ^ a "eist an undesirably poor Ansohmiegungsfählgkeit and flexibility," particularly at the lower temperature & i,

109816/1929 _B AD ORIGINAL

d ± k oai selu & v can occur cautiously * on

The Crystalline! Did _? the kexmseiofcnend let for the chlorinated

The Ex ⁱ ingenious, is essentially a restinity of the starting polyethylene. The chlorinated polyethylenes have the desired crystallinity by chlorination of polyethylenes with high crystallinity, which is greater than about 75% and usually 75% and 5 % measured according to an acsolutaiethode, for example by infrared spectra analysiseb @ fc? ^^ t. The polyethylene from which the chlorinated polyethylene of the invention is obtained by chlorination is a linear Ktnylenpolymeris high dichüej with the BsseioIiBiing ^ß linear "or" essentially linear "means a polyethylene ^ ₅ which is high density nd at most noniänslle lcur ^^ ettige branches in the form of methyl groups, more intimately than 10 methyl groups per 1000 carbon atoms in the molecule and usually 0-5 methyl groups per 1000 carbon atoms Polyethylene is in aligGKiainen Q _S 935 - 0 * 985.-

chlorinated polyethylenes with the g © tiüii? 3oliten Krisfeailinitäfe • Μία GlaisUbergangsteaiperatur become aweelöaäasig by chlorinating the ÄissangspolfEfcliylens in an i ^ erogenous system with gest € i! is £ ⁵ f- · ■■: -? T <5®TM '£ -8.tV3? and CiiloraiAfuhrgeiSoteeiiidigkeife received *

10981R / 1929

© aiigiJKsis done chlorination in aqueous slurry at a temperature of initially 6 NC - 110 ⁰ C, at least about not iao ° C> However, on more than 25 - is increased '33O' C '' and an average of 0.2 Chlorsufuhrgeschwindjskeit - O ₃ 5 kg per kg of polyethylene per hour. The maximum temperatures outside the production of the chlorinated polyethylene of the desired crystallinity depend on the molecular weight of the starting polyethylene and the amount of chlorine "which is introduced at the higher temperatures". The chlorination time is usually 1 1/2 - 12 hours. The progress of the chlorination can be determined by taking samples from time to time, and the temperature and chlorine feed rate can be adjusted so that the desired crystallinity and glass transition temperature are achieved. Gernäss a preferred form of implementation of the method for producing the chlorinated polyethylenes having the desired properties is the chlorination at a temperature of 80 - started 105 ⁰ C, and the temperature is, after the first 10 - SO wt .- ^ chlorine are introduced, such as by Taking samples can be determined, slowly increased to about 120 ^e G, \ md at this temperature about 15 - 25 % chlorine are introduced into the polymer. ? Also Chlorsui * ubrgesoh ilndigkeit is preferably from an initial time of about O ₃ S kg / h / kg elnggsetztes polyethylene to a value of 0 * 2 - 0.5 kg / h / hv: increased Ausgsn ^ spolyäfchyleri towards the end of Chlopieiuuag. The pressure applied to the chirification is also from Eix! the He: rate.Xlimg of the olilorierte

1 0 9 8 1 6/1 9 2 9

with the desired crystallinity and The Ohloriorung takes place in general vorzwgswaise at pressures in the range of 0 - 7-attt * As can be seen from a comparison of the following Examples 1 and 2 with Example 3, must in the preparation of the preferred chlorinated polyethylenes' ι from preferred Ausgangspolyäthylenen vjenigstens about the last 20 wt .- # chlorine at a temperature of not we sent lic: be introduced untex · 120 ⁰ C, but the introduction of chlorine is avoided at 130 ° C au. In order to be able to maintain this temperature in this part of the reaction, if a polyethylene of moderately high molecular weight, ie a soot high intrinsic viscosity, is used as the starting material, as is necessary to achieve the desired viscosity, a starting polyethylene must also be used a molecular weight distribution in a narrow range, since the material oil BOUBt agglomerates slightly towards the end of the reaction. The thormic depolymerization product used in the examples has proven to be suitable.

Stabilizers and pigments can easily be incorporated into the chlorinated polyethylene, and the chlorinated polyethylene can be easily processed into films * if it has an average molecular weight corresponding to an intrinsic viscosity in ο-dichlorobenzene at 100 * 0 of not usable about 1.8 dl / g has. For a good tensile strength of 140-280 kg / cm, a good travel elongation of 400 * · 500 % and the maintenance of flexibility

BAD ORIQ ^ ^AL

10 9 8 16/1929

have the Selbstklebesfcreifens obtained from the polymer over a long period must the chlorinated polyethylene has an intrinsic viscosity of at least 1.0 dl / g as measured in ο-dichlorobenzene at 100 ⁰ C. Such polymers are obtained by chlorinating a linear high-crystalline ethylene polymer of high density with a molecular weight of 50,000-400,000 and preferably 80,000-250,000. Particularly good properties have those chlorinated polyethylenes on "by Chlorleren of Äthylenpolymerisaten with molecular weights from 50,000 to 400 00o _5, the thermal degradation of accordance. British Patent 858,674 produced ultra-low molecular weight polyethylene orh & lten sine

/obtain

'· By this "also in this British patent specification described thermal depolymerization the polyethylene of high molecular weight by heating to a temperature in the Orössenordnung of about 350 is - 400 ^e C in Abwesenhsit of oxygen thermally decomposed or ciepolymeriaiert, If desired, also during the depolymerisation Shear forces are applied. The polyethylenes obtained by thermal depolymerization of high molecular weight polyethylenes are practically linear products with a molecular weight in the range of about 10,000-400,000 and usually 40,000-200,000 and a density between about 0.935 and 0.985 g / cm ⁵ . The ultra-high molecular weight polyethylene; British Patent Specification 858.674 mentioned is a crystalline high-density polyethylene, by polymerizing

109816/1929 _BAD original

\: BBirivfvexom ... sauQir-atefSreiem .'ethylene in the gas-p'aaBe via Gi.noäi porous catalyst made of an inorganic compound of Ohron * and oxygen and an active metal alkyl on aa? Carriers other than silicon dioside receive en wlx-Ä. _; According to Diessia Yer £ ahren orlial toned polyethylenes contain a residual amount of the Chroiv'SilioiuiLdioxyd-.KatalyEators in an amount of at least about 0.01% and usually 0.1% 0.1% by weight of the polyethylene The catalyst added during polymerisation remains in the polyethylene during the chlorination and is present in the chlorinated polyethylene obtained in chlorine. The ethylene polymers obtained according to the British patent mentioned above have a crystallinity of at least about 30p and. gev / öhnlieh aviischen 50 and 75 ^ ₅ bestiniDit by differential thermal analysis sample siner v'ärniebehandelten a countenance e ^ iisclien 0.935 and _0? 90P g / CNRR and! ttittleres Holekulargev / ioht of wenigabens 700,000 and gei / EViischen öliialich about 1 million _t 0 and 5: -0'Killionen ", calculated using the method of P naoh ₀ S _e Franoiö et al aue the ty a solution of about 0 _g 05 bia 0 1 g per 100 _P?

g in Bolralin at 135 ⁰ C as '\ Before Using the equation: η "6.77 χ 1O ^-4 M ^{0' 67}

η the intrinsic viscosity and H the mean weight liclecular weight. (see ο J _c EOlymer Science Volume 3'I ₃ pages 445 - 4-66 ₉ September 'i95G; is * you according to the example £

BATH ORIGINAL

109 8 Ki / 1929

the above-mentioned British Patent Specification erheltenen high molecular weight polyethylenes are linear polymers., which can also be characterized gkennzeichnet ₃ that they contain linear lejigkettige Polyäthylenverzweigungen * These high molecular weight polyethylenes have a Schmelaindex of below 0.10 according ASiDM D1238-520) at 190 ⁰ O and using a weight of 2160 g, a tensile strength of the order of magnitude of 350 k & Om according to ΑΒΪΜ D412-51I and an elongation at break of at least 350 and generally 350 to 470 tfo according to AStDM D412-512 as well as a high impact strength of at least 0.83 and usually 0 ₅ 83 to 1 _s , 42 rakg / cm notch according to AS2M D256-543? (laod) _e

The chlorierton Polyethylenes with the gewOnsohten Kristallini · tat, which are obtained by chlorinating the thermally depolymcrisierten Polyethylenes ₅ are at 25 ⁰ O insoluble in organic Lösungomitteln ₃ as the aromatic hydrocarbons) ketones, and esters, for example toluene _{t 0} ÜJetrachlorkohlenstoff methyl ethyl ketone and Butylaoetat "This chlorinated Polyethylenes have tensile strengths according to ASSM D-412 at a tensile speed of 51 cm / min of at least about 14 and usually 140 to 30 kg / oci ^e "and an elongation of 200 to 600 $ and usually 400 bio 500? S according to ASIM D-412 ,

The self-adhesive sticks of the invention can easily be used

1098 16/1929 bad

conventional methods produced "ground _o for the production of the Ireägers the chlorinated polyethylene is mixed with stabilizers * lubricants and pigments." Suitable stabilizers are those. " which are generally used as stabilizers for plastics containing chlorine ;? such as polyvinyl chloride, are used ■ Examples are the inorganic salts and organic complexes and salae. of metals such as barium ,, cadmium, Zlnn ₅ Zinc *, lead, sodium, etc. Me inorganic salts _f, for example the sulphates ₃ sulfides and phosphides are bevoimigt * These stabilizers are! 'rush example, in amounts 1-15 ropes 100 in chlorinated Polyethylene used Also suitable lubricants are known and belong to them materials which also have a stabilizing effect. The preferred lubricants are stearic acid and lead and admium ether. The lubricants are usually used in amounts of 1 to 10 parts per 100 ropes of the chlorinated polyethylene * The preferred pigments are the «end» dia auo-producing effect »like carbon black * Bs on but also other pigments and fillers ₅ w: Lβ Sitandio3 £; / cl and 1'one are used _? Vorpiugsweise be DIE Seni ^ mi lullstoffe used that used for use on Clem area der'Elektrotechnik "fillers suitable v / ground usually in amounts of 1 to 50 cords per 100 Saile of ohlorierten polymer A particular advantage of the invention is, that the introduction of filling is open

BATH ORIGiMAL

10 9816/1929

nods the effect that aas product no longer don Sohrift of the Underwriters · Laboratories for electrical tape enough. Stabilizers * Lubricants and pigments can can be introduced into the chlorinated polyethylene by placing it on a roller mill or other suitable device at room temperature or at higher temperatures interfering in this *

The chlorinated polyethylenes of the invention can without addition of a Weishmaohors to Srägern for Selbatklobeabreifen with all of solohe strips prescribed BigenBchaften be processed ₀ to achieve certain ■ properties or to improve the suitability of mass al "Iraqis for self-adhesive strip au general jodoch plasticizers in amounts up to For example, small amounts of plasticizer can be added to those chlorinated polyethylenes with a relatively high crystallinity of, for example, 10 to 20 $, in order to improve the conformability and flexibility ^ Such small amounts of Plasticizers can also be used in plastics which are soluble in the plasticizer and are present as impurities, such as amorphous or high molecular weight chlorinated polyethylenes which get into the polymer in trace amounts or at least in small amounts during manufacture and processing n can

109816/1929 bad omüiNAL

and which otherwise have an undesirable surface effect, _{e can,} for example, cause the formation of fine holes in the substrate? au homogenisierensAla plasticizer for the chlorinated polyethylenes can be commonly used for polyvinyl chloride vervjon & soldering plasticizers * How "in the production of Srägerstreifen for self-adhesive strip usual, there -wenigstens a rope ₅ in particular -wenigstens 20 $ of the plasticizer from heretofore known polymers * for example, a polyester * other useful plasticizers ßintl the epcxydierten oils and as plasticizers known monomeric compounds such as monomeric esters of acids "such as phosphoric acid, phthalic acid ₀ adipic acid and sebacic acid with alcohols having from 4 to 16 and usually having 4 to 12 Kohlenet off at oraem known, migrate, the polymeric plasticiser is less Slightly from the embossing strip into the adhesive and preferably 40 $ of the entire Weiohmachero ₉ if this is used for a blended tea plyethylene of the invention.

The iürä £ »3rBtreifen from the chlorinated polyethylene, after verßohie & ENCN methods, - as Estrudern and Kaiandorn Herge ~ represents vjerdeno Ir can be manufactured in various thicknesses who CISN and is usually _r produced in a thickness of O * JO5 to 1 2i5 mm? The pressure-sensitive adhesive can be used above by customary processes, for example by calendering. brush with a solvent

BATH ORIGINAL

1098 16/1929

_c saramen the Crägarsiireifeh from OH3 orierten polyethylene applied The pressure sensitive adhesive can be any eggs known for this purpose adhesives He "must of course adhere sufficiently firmly to the Irägerstreifen and be compatible with this? so that it does not separate itself from the strip * when it is peeled from the cover * or from the surfaces to which it is supposed to adhere. Examples of suitable pressure-sensitive adhesives are those based on elastomeric materials such as natural gourami, regenerated rubber and synthetic rubber such as polybutadiene and its copolymers with styrene, polychloroprene, polyvinyl ether and the elastomeric chlorinated polyethylene itself Weiohizers or other plasticizers ₉ such as polyisobutylene and the oumarone-indene harpsichord achieved. The pressure-sensitive adhesive can also be used as an extender? Target substances _s stabilizers and other commonly used in such compositions materials, "Generally v / ground for making the Selbstklebeoifcreifen the invention vorsugaweise those pressure-sensitive adhesives or adhesives are used which are commonly used for self-adhesive strip with a polyvinyl chloride _c How can also common to the A primer or adhesive layer can be applied * before the carrier strip

BATH ORIGINAL

1098 16/1929

the pressure-sensitive adhesive applied; wii "d" is well known can duroh such primers the adhesion of the adhesive * material on which! embossers are improved »For the production These primers are in turn preferably used those compounds that are also used for the production of the corresponding Strips on a polyvinyl chloride support can be used,

The following examples are intended to illustrate the invention Ropes and percentages relate to weight «

Example I

Chlorinated polyethylene with a chlorine content of 40 $ was weight by chlorinating polyethylene having an average MoIekul £ 3 "110 00o ₉ determined from the viscosity _{5 is} made." The starting polyethylene was thoniisohe (depolymerization of a polyethylene produced by polymerization of acid-free ₉ acidic cfi-free ethylene in the gas phase over a catalyst au® Haguesiumdiohromat on a porous silicon dioxide carrier with aluminum triisobutyl with an average molecular weight of 1.6 million, depending on the viscosity ₃ worden.Das obtained polyethylene containing a residual amount of chromium / yd SiliQiumdio ¥ ** Katalysa'uor8 from about 0.015 $ dispersed _a thermally the depolymer ± wobbled polyethylene and polyethylene of high molecular weight were gemäsB example 6 of britisohen Patent 858674 ER

BAD ORIGINAL 10 9 8 16/1929

"The polyethylene obtained by depolymerization with a molecular weight of 110,000 was about 20 times its weight in water in a closed Containers slurried and in this aqueous slurry first chlorinated at a temperature of about 100 ° 0 until chlorine were introduced into the polyethylene * Then the

Chlorination were introduced at a temperature of 120 ⁰ C fori gesetat "until a total of $ 40 in chlorine dao polymer * The Geeamt-EEIT the chlorination was about 2.1 hours and the average CJSbrzufuhrgeachwindigkeit about 0.2 kg / h / fcg inserted polyethylene ., The .Druok was during the chlorination; 0 to 1. ₅ 2 atti "The resulting slurry was filtered and the chlorinated polyethylene was 24 hours at 60 ⁰ C ge" trookäeto Ss had a chlorine content of 4O £, meadow about 10 ^ Roatkristallin! Did the Auegangspolyäthylens, duroh thermal Differentlalanalye determined · , and had a ölaaübergangstemperatur of about 5 ⁰ O, bestiemt from the stiffness modulus gemäoa AS5JM D1053-61, of the value dyn / om "reached the intrisic viscosity of the chlorinated polyethylenes at this temperature was 10 * 1 _S 27 dl / g in o -Dichlorobenzene at 100 ⁰ Oo

100 parts of chlorieten polyethylene were on one Zweiwalaenatuhl at room temperature with 7 ropes of lead silicaL sulfate ("Irlbaae" E of the Hational lead Company), part of RuI)

BATH

109816/1929

-.19 -

and ί Jj ropes zweibasiseli-sm stearate ^ DS-207 of National Lead Compsny) mixed * "The resulting mixture was mm from the roll mill as a sheet with oiner thickness of about 0 _f 62nd applied and then at 15O ⁰ O a film au with an average thickness of 0 «20 mm calendered This SOLIE wurde- in 2 * 5 mm wide strips * as aerschnitten for Prüiimg required eind _3? the strips were subjected to various standard tests _£ einachliesalich those of Tlndeiwriters ¹ Laboratories for tape (UL 510) from subjected March ;? 1954 (reprinted January 1961) * the Ergebnißöc the test are ausammen in Sabelle I with the requirements of the Underwriters'! laboratories Ul 510 Unless mentioned it prescribed the test regulations, the Polyäthylenstreifen was on with a coating of a conventional pressure-sensitive KLebmassQ Based on a butadiene / styrene copolymer using a conventional primer based on a butadiene-acrylonitrile misoh polymer s been provided « The flexibility and adaptability required for an electrical insulating tape were better than those of the ponot very similar tape from Example 2 o

10 9 8 1 (> / 19 2 9

(Ilabelle I

Physical Properties

HL 510 test

required Ul test result

Dielectric breakdown strength

strain

Medium tear strength

Moisture absorption after 10 minutes in boiling water

Moisture absorption after 72 hours at 28-32 ⁰ G in humid air

After 60 sayings at 87 ⁰ O

After 2 hours at -1000

Deformation under load of 500 g at 100 ⁰ O

Storage of an unused Holle 60 Sage at 40 ⁰ O not below 350 V per 0.025 mm thickness

at least $ 100 (5 _? 1 om)

at least HO kg / om ^{2 would} not increase by more than 5t> weight β

no more than 3.5 $ weight * increasing

No hoisting when bending. No hoisting when bending, no transfer of glue or loss of adhesiveness

no more than # Diokenab-

1200 V each 0.025 mm

273

No hoisting when bending

No hoisting when bending * no transfer of keelet off or loss of adhesiveness

Can be used for the Xso Corresponds to the splice requirement Preservation of adhesiveness so that Splice points can be isolated

1 0 9 8 1 B / 1 9 2

BAD ORJOiNAt

Shrinkage test required according to the test result

UL 510

Shrink after less than $ 5

30 minutes at

Me shrinkage test is ^{not prescribed by Underwriters 1} Laboratories, but is a requirement of the industry for insulating tape _{or the like}

Boiapiel 2

Chlorinated polyethylene with a chlorine content of $ 40 was made by chlorinating the same linear polyethylene with an average molecular weight of 110,000 as in Example 1 a temperature of about 100 ⁰ O for 2.1 hours chlorinated to 17 #. Were introduced chlorine into the polyethylene · Then, the chlorination Jrhöhen the! Temperature over one hour to 120 ⁰ O was continued} were introduced to inagesamt about 25 $ chlorine in the polymer "Then, the chlorination was still 3 ₃ 4 hours at 120 fortgesetst ⁰ C "were introduced to a total of 40 $ chlorine" The öhloraufuhrgeschwindigkeit was about 0 ", 2 kg / h / kg inserted polyethylene" The pressure was formed during the chlorination Aev 0 to 1 * 1 * atti

BATH ORIGINAL

109816/1929

Slurry was filtered and the chlorinated polyethylene was dried for 24 hours at 60 ⁰ O. ·, Ba had a chlorine content of 4OjS ₉ a crystallinity of "twa 20 $, as determined by differential thermal analysis and expressed in percent of the Kristallinitäii of Auegangspolyäthylens you" glass transition temperature was about 14 ⁰ O ₉ determined from the stiffness modulus according to ASQ) M D1053 "61, which at this temperature Q / 2

the value 1 (P dyn / cm reached. ”The molecular weight of the chlorinated polyethylene corresponded to an intrinsic viscosity of 1.23 in o-dichlorobenzene at 100 ° _e

100 ropes of the chlorinated polyethylene were mixed on a 2-roll mill at room temperature with 7 ropes of lead silicate sulfate ("Tribase" E from the National Lead Company), one part of carbon black and 1.5 ropes of two-base raw lead tearate (DS-207 from the National Lead Company) were 5 parts of a polyester wether; the ISTY eingemisoht under the designation G-62 in trade., The resultant mixture was discharged from the roll mill as a sheet having a Dioke from about 0 ^ 62 mm and then at a temperature of 150 ⁰ C into a film having an average thickness of 0 , 16 mm calendered «This polie was made in 2.5 om strips, as required for the test, gersohnitteno snugness and flexibility

were good and were evaluated as in Example I «The test values are compiled in Table II *

BATH

1098 16/1929

Physical Properties

510 3? Est

Gef ordeitL * gomäss UL 510

Test result

Dielectric breakdown strength

strain

Medium tear strength

Moisture absorption after 10 minutes in boiling water

Moisture absorption after 72 hours at 28-3200 in moist air

Haeh 60 were at 8 ° C

After 2 hours at -1000

Deformation under load of 500 g at 10O ⁰ O

Storage of an unused roll 60 Sage at 40 ⁰ O not below 350 V. per 0.025 mm thickness

at least $ 100 (5.1cm)

at least 140 kg / cm ² no more than $ 5 weight gain

no more than 3 ₃ 5 # weight gain

no cracks
when bending

no cracking when bending, no transfer of adhesive or loss of adhesiveness

no more than $ 65 decrease in thickness

Can be used to isolate splice parts * Preservation of adhesiveness; so that splices can be isolated

1000 V per O «O25 mm

$ 350

295 kg / cm ^S.

No cracks when bending

no cracking when bending _s no transfer of adhesive or loss of adhesiveness

Is equivalent to

the requirement

Shrinkage test

Shrinkage after 30 minutes at 100 0 less than

BATH

10981 f> / 1929

The shrinkage test was also carried out with the chlorinated polyethylene of the example, which is not ^{prescribed by the Underwriters 1} Laboratories, but is required by the industry.

Example 3 (comparison example)

A) A backing tape for a pressure sensitive adhesive strip was made as described in the previous examples except that a slightly different chlorinated polyethylene was used to show that the use of the chlorinated polyethylene of the invention is essential in obtaining a satisfactory pressure sensitive adhesive strip The starting ethylene used for the production of the chlorinated polyethylene was the same polyethylene obtained by depolymerization that was used in the previous examples. eraporatur ohloriert of 100 ⁰ C, were introduced to 17 wt _e ~ $ chlorine, and then increasing the Eemperatur to 120 ⁰ O next? up to a chlorine content of 23 (rew <>> - # i chlorinated * Then the chlorination was continued at 120 ⁰ C until a total of 37 Gei /, - # chlorine had been introduced into the polymer, whereupon the T-empei-atur p.vf 130 ⁰ C increased and the chlorination was stopped _s bin infi total 41 * 4f> chlorine in the polyethylene were introduced .. ! Dan

BAD OBlGtNAL

1 0 9 8 1 h / 1 [) 2 9

chlorinated polyethylene had a chlorine content of about 41-? 4 ßew _s ~ $ and a molecular weight corresponding to an intrinsic viscosity of about 1 j6 dl / g in o-dichloro * »benzene at 100 ⁰ _5, however, no crystallinity detectable by thermal differential analysis and a glass transition temperature of about -12 ⁰ C, determined according to ASffiM 3) 1053-61 _ö Sin from the chlorinated polyethylene of this example by the method according to Example 1 produced carrier tape for a self-adhesive strip failed in the essential test "deformation under" load "and thus satisfied the ¥ regulations of the Indorv / ritera 'Laboratories for electrical insulating tape not "

"Has been B) As shown in Soil A) of this example was a chlorinated polyethylene prepared with the deviation jjedooh _s that up sii chlorinated with a chlorine content of 46 ₉ 5 weight _a ~ $ Also this product showed no Eristallinitäto Bs had an intrinsic viscosity in o-dichlorobenzene at 100 ⁰ O of 17 dl / g "Although, like those of Examples 1 and 2, it had a glass transition temperature in the range prescribed by the invention, namely 1 ⁰ C ₃ , it met the requirements of the underwriters' laboratories for the test" deformation under load "(IJL 5t0) not ₉ from which it follows that both the crystallinity and the glass transition temperature are in the specified ranges

BATH ORIGINAL

1 0 9 8 1 f) I 1 9 2 9

., 26 -

must lie so that the chlorinated polyethylene all on top The specified requirements for electrical insulating tape are sufficient ο

BAD OBtQINAL

10 9 8 16/1929

Claims (2)

Pat e η ΐ ans'sprohe 1 ο Self-supporting Folic made of a chlorinated linear polyethylene in that the chlorinated linear polyethylene has a chlorine content of 40 + 5 wt _. - $ 6 hatj 5 "to 20 $ of the original Polyäthylenkristallini" · ty ₉ determined by differential thermal analysis, "owns and a glass transition temperature of -5" dl to +15 ⁰ O and an intrinsic viscosity from 1.0 to 1 ₅ 8 / g in o-dichlorobenzene "at 100 ° ö has" 2.ζ Self- supporting lolie according to Anepnioh 1 ₅ characterized · that the chlorinated polyethylene eiae polymer it <t ₉ by chlorinating a linear polyethylene with an average molecular weight of 50,000 to 4-00,000, which is produced by thermal depolymerization of a linear polyethylene of ultra-high obtain molecular weight having an average molecular weight of TOO 000-5000000 _f is iat obtained in a heterogeneous medium " 5 ο Use of a chlorinated linear polyethylene ₁ which has a chlorine content of 40 * 3 Gev / _O - ^ _r 5 to 20 $ of the original polyethylene crintallinity ₉ determined by differential analysis, besHjjat and a glass over- transition temperature of '-; i bie -MD ⁰ C imd an intrinsic BADORIGtNAL 1098 16/1929 from 1 fO to 1 _S 8 & 1 / & in ο -Dichlorbonsol at 10O ⁰ O has «alß for a Selbatklebostreifsn _e BAD 10981 ^ / 1929