CS211908B1 - Antistatic polyethylene technical foils with hydrophylic properties - Google Patents

Abstract

The purpose of the invention is to provide an anti-slip finish pelyetyléléheh teehalekýeh foil with hydrophilic waves, and with short term lifetime, determined mainly for agriculture. Tent · purpose can be reached by adding 0.1 to 1.0% wt. base-based antistatic composites oxyethylase and 0.1 to 1.0% wt. a stabilizer containing antioxidant and thermal stabilizer fenellekéfeo type, UV stabilizer or benztriazole type, niobium a complex stabilizer, eventually poataerythltoldifold to polyethylene s melt index 0.2 to 2.0 g / 10 min. Object The invention can be used with films for commercial and technical purposes.

Description

(54)

Antistatic polyethylene technical films with hydrophilic properties

The purpose of the invention is to provide an antistatic treatment of pelyethylene-free, long-life or long-life hydrophilic wool films intended primarily for agriculture. This purpose can be achieved by adding 0.1 to 1.0 wt. % antistatic composites based on oxyethyl compounds and 0.1 to 1.0 wt. a stabilized stabilizer comprising an antlosldant and a heat stabilizer of the fennel type, a UV stabilizer of the beazo-benzoic or benztriazole type, a low complex stabilizer, optionally a poateryltriol dipolar to polyethylene having a melt index of 0.2 to 2.0 g / 10 min. The present invention can be applied to films for palo-economic and technical purposes.

211 908

211 90

The subject of the invention are technical films based on polyethylene, and / or polyethylene 8 with prolonged endurance, containing antistatic coaposition, which are particularly suitable for use in agriculture.

Polyethylene, as most thesnoplanets are dielectric, polyethylene foils charge and soak in use. Due to their hydrophobic character when used for the construction of plastic containers, tunnels and shelters, they condense on them fine drops of water, causing foil coating and adversely affecting the vegetation in these plants.

For antistatic treatment of polyethylene films, various preparations are used.

They are predominantly anionic, cationic and non-ionic tenels, in particular ethylene oxide and propylene oxide adducts. Sometimes fatty acids, alcohols, amides, or inorganic additives such as e.g. oxides, carbonates, silicates and phosphates.

Ioh use is more fully characterized e.g. U.S. Pat. Nos. 3,720,652, 3,296,019, Japan 28,607/68, 2092/69, USSR 328,117.

Phosphoryl, sulfur, olefinic, iaidaeolinium, siliceous and borate derivatives are also used. Detailed description is given, for example, in U.S. Pat. No. 3,126,338, USSR 33 * 227, Germany 2,053,489, Jap. 2 972/70, 24 044/67; 290,033 and Trano. 2,025,541.

Anti-static agents are known for treating polyethylene agricultural films with short- and long-term shelf life, albeit in numbers. Mainly nitrogenous compounds derived from primary, secondary and tertiary amines, as well as araids, are described in the aaaledition documents: US 3,365,435 »UK 1,125,248, Franc,

054 369, Germany 1 669 480, USSR 360 350.

The disadvantage of using the above-mentioned antistatic agents is that by using them they achieve optimum antistatic tuning, minimal dirtiness and superficial surface hygroscopicity.

Conversely, good hydrophilicity cannot be achieved with antistatic agents that are less migratory to the surface and their antistatic efficacy and dirt reduction are limited.

These disadvantages are substantially eliminated with antistatic polyethylene technical films having hydrophilic properties, and short-term or prolonged shelf life, preferably films for agricultural purposes which contain

98.0 to 99.9% by weight of polyethylene with a melt index 0.2 to 2.0 g / 10 min.

0.1 to 1.0 wt. % of an anti-static composition based on oxyethylated compounds and optionally 0.1 to 1.0 wt. % of a mixed stabilizer containing 10 to 40 wt. % of an antloxldant and a phenolic type heat stabilizer, 20 to 40 wt. % UV stabilizers of the benzene and / or benztriazole type, 40 to 10 wt. % of a nickel complex stabilizer, and 30 to 10% by weight of pentaerythritol disphosphite, respectively.

The antistatic composition comprises i

211 9 · β to 40% by weight, and preferably 30% by weight, of a substance of the formula RN- / C _of H _{2 from} O / _n ^H where R is alkyl and the number of C 10 to 25, from 1 to 5; 50 to 40 wt.%, and preferably 20% by weight, R - 00N / C _z H _2z 0 / _n H, wherein R is alkyl and the C 9 to 26, 1 to 5, n is 1 to 60, and 30 %, and preferably 20 wt. R - C00 / C _{of the} Hg 0 / _n H, wherein R is alkyl, and C 10 to 30, · of 1-5, and 1-40, a 25 wt.%, And preferably 15% by weight. Wherein R is alkyl and C 11 to 28, 1 to 5, η 1 to 80, up to 25% by weight, and preferably 15% by weight. N - 0- / C _z H _2z 0 / _fl H, wherein Ar is an octylphenyl, nonylphenyl, and dodecylphenyl, from 1 to 5, n is 1 to 100th

Polyethylene film and short and / or long-term durability, by using an antistatic mixture, ensures optimal balance of good antistatic effect, minimal soil and good hydrophilicity of the film surface.

The anti-ATI films and extended lifetime of the present invention can stabilize and 0.1 to 1.0 wt. 10 to 40 wt. % of an antioxidant and a phenolic type heat stabilizer, 20 to 40 wt. % UV stabilizer of the benzophenone aZ or benztriazole type, 40 to 10 wt. % of a nickel complex stabilizer and 30 to 10% by weight of pentuerythritol diphosphite.

The thermoplastic polyethylene films of the present invention can be successfully used for semi-dispensing purposes, as well as for various technical applications of films and short and long-term durability where aa require antistatic properties, at least soil and high hydrophilicity (sacks, shelters, etc.).

The following examples show polyethylene films with short and long term durability, with the addition of an antistatic synergistic formulation, as well as comparisons with the method used to date, without limiting the scope of the invention.

Example 1

Short-lived films are prepared by blowing polyethylene Bralen RB-03-23 on a Buzuluk D »32 mm extruder at 155 rpm, die diameter 80 mm and thickness 0.16 mm.

Electrical quantities, dirtiness and surface hydrophilicity are determined on the prepared films at 23 ° C and 40% RH. The results are in the following table »

211 8BB

Measured quantities

polymer

RB 03-23

El. surface resistance Rp / ohm / over 10 ¹³

Elektrostal. sweating.

U / volt / 4,683.10 ³

Dirtiness ash intensely dirt

Hydrophilicity wetting angle / ⁰ /

180

Example 2

Polyethylene film and extended life film, prepared as in Example 1, and containing 0.2 wt. Wt. Of the benzotriazole type UV stabilizer, 0.3 wt. % antioxidant and phenolic type heat stabilizer; and 0.2 wt. % as a antistatic agent, in an amount of 0.2 wt. the following composition is used:

20% wt. RN (CH 2 Cl 2 O) 1 H, wherein R is C 10 alkyl, wt. % R-CON / GH2OHgO / yH, wherein R is C12 alkyl; R-CO / CH ₂ CH ₂ O / ₄ H, where R is alkyl of 11 C, wt. R-O- / CH ₂ CH ₂ O / ₃ H, wherein R is an alkyl of 14 C wt. Ar-O ^ (OHgCHgO) 1, wherein Ar is octylphenyl

The characteristic values of the foil are as follows:

R / ohm / »3,8.10 ¹⁰ dirty - not dirty

X *

U / volt / 43 hydrophilicity 4 ° / wetting angle /

Example 3

Polyethylene film and extended life as in Example 1 and containing 0.3% benzophenone type UV stabilizer, 0.2 wt. % of an antioxidant and a phenolic-type heat stabilizer; and 0.2 wt. % of a pentaerythritol diphosphite type stabilizer using 0.3 wt. antistatic synergistic mixture composition:

% wt. RN / CHgCHgO4H, wherein R is C12 alkyl; R-CON / CHgCHgO / H, wherein R is alkyl of 18 wt. R-COO / CHgCHgO / H, wherein R is C14 alkyl; R-0- / OH ₂ CH ₂ ^{0 / H "wherein R = C 0 21»%} by weight. Ar-O-ZCEgCUgO / H, wherein Ar is nonylphenyl.

The characteristic values of the foil are as follows:

Rp / ohm / 3,15.10 ¹⁰ dirty - not dirty

U / volt / - 36 / contact angle /

211 908

Example 4

Polyethylene film and short-lived as in Example 1, wherein the film is prepared with the addition of 0.5 to 56 wt. antistatic composition composition:

% wt. % RH / CH ₂ CH ₂ O / ₅ H, where R is alkyl and C 22 wt. % R-CON / OH ₂ CH ₂ O / gH, where R is alkyl and C 14 wt. % R-COO / CH ₂ CH ₂ O / ₇ H, where R is alkyl and C 26 wt. % R-9- (CH ₂ OH ₂ O) B where R is alkyl and C 12 wt. Ar-O- / C 9 { ₂ GH ₂ O / ₄ H, wherein Ar is dodecylphenyl.

The characteristics of the film are as follows:

Rp / ohm / 4.2.10 ¹⁰ ipinivoať - neipiní ϋ / volt / -45 hydrophilic -6 ° / wetting angle /

Example 5

Prolonged-life polyethylene films, prepared and formulated as in Example 3, wherein the film aa is prepared with an addition of 0.8% by weight. and in the following composition:

% wt. % RN / CH ₂ CH ₂ O / ₄ H, where R is alkyl or C 20, wt. % R-CON / CH ₂ CH ₂ O / ₅ R, wherein R is alkyl and O 15 wt. R-C00 / CH ₂ 0H _{2 0/8} H, wherein R is alkyl, and C 28,% by weight. Μ- / αα ₂ α ^, 0/1 ₍ Α, where R is alkyl and C 14, wt% Ατ-Ο-ΖΟ ^ Ο ^ Ο / ^ Η, where Ar is dodeoylphenyl.

The characteristics of the film are as follows:

Rp / ohm / · 6.2.2 ¹⁰ ipinivoať - neipiní

O / volt / «30 hydrophilic 7® / contact angle /

The short and long term polyethylene films according to the present invention can be successfully used both in agriculture and in other technical applications where aa require antistatic properties, minimal adhesion and excellent hydrophilicity of the film surface.

Example 6

Procedure as in Example 1, and by adding aa component to pelyméx in an amount of 0.2% by weight of the composition:

RR / CH ₂ CH _{2 0/4,} where R is alkyl C 10 did not care variables:

R / ohm / U / volt / Dirt Hydrophilic / ° /

9,1.10

112 does not pinch

211 90β

Example 7

Process as in Example 1, with the addition of stabilizers according to Example 2 and 0.5% of hatal antistatic agents Ar-O- / CH ₂ CH ₂ O / ₅ H, where Ar is octylphenyl

Measured quantities:

R _p / _o / U / Volt / Dirt

3,5.10 ¹² 1 15 We sweep

Hydrophilicity / ° / 35

Example 6

The procedure of Example 7, with the addition of 0.8% by weight of the antistatic agent R-GO (GH2GHgO), wherein R is C11 alkyl

Variable quantities:

2,1.10

U / Volt / 135

The filthiness weakens dirty

Hydrophilicity. 18

Claims (3)

OBJECT OF THE INVENTION 1. Aatistatic polyethylene technical films having hydrophilic properties, short or prolonged, and preferably films for agricultural purposes, characterized in that they contain: 98.0 to 99.9 wt. polyethylene and a melt index of 0.2 to 2.0 g / 10 ala, 0.1 to 1.0 wt. % of an antistatic composition based on the oxyethylated compound and optionally 0.1 to 1.0 wt. of a mixed stabilizer containing 10 40% tip. an antioxidant; and a heat stabilizer of the fluff type, 20 to 40% haot. UV stabilizers of the benzophenone * / or benztriazole type, 40 to 10% haot. % of nickel coaplex stabilizer and 30 to 10 wt. peataexytrlteldlsfosfitu. 2. Antistatic polyethylene technical films with hydrophilic fibers according to claim 1, characterized in that the antistatic composition comprises: 10 to 40 wt.%, Preferably 30 wt. compounds of the formula wherein R is alkyl having a number of C 10 to 25 »from» 1 to 5 »and« 1 to 50, 10 to 4% haot, preferably 20 is haot. CPC-R / C _z H _2z 0 / _{β Η,} wherein R is alkyl of 9 to 26 C, of from 1 to 5 »η '1-60 1 to 30% haot, preferably 20% haot. Β-σΟΟ / σ ^^ Ο ^ Η, where R is an alkyl of C 10 to 30, z = 1 → 8 5, and - 1 to 40, 5 to 25% by weight, preferably 15% by weight. RO- (C _and H ₂ O) wherein R is alkyl of 0-11-28, z-5 to n-1-80, 211 β · » 5 to 25 wt.%, Preferably 15 wt. Γγ-Ο / Η Η Ο Ο Η kde, wherein Ar is octylphenyl, nonylphenyl, and dodecylphenyl, from 1 1 to 5, and from 1 to 100.