SU935515A1 - Polymeric composition - Google Patents

Description

(54) POLYMER COMPOSITION

This invention relates to stabilized polyethylene-1 polyethylene-based polymers that can be used to produce polyethylene films in agriculture. In industry, as additives to polymeric materials, in parts; to polyethylene, stabilizers are used that are effective only against one type of degradation, v. 6. are vvv thermal or light stabilizers. Therefore, it is customary to impart simultaneously light to the heat stabilizer in order to make the polymer resistant to heat or light destruction. Known polymeric material based on polyolefins, containing thiophenols as stabilizers. A disadvantage of this composition is that the composition is effective only against light-dyeing of polyopefins; Closest to the proposed technical essence and the achieved polo-aggenem effect is a polymeric crushing of polymers of polymers of low polyethylene SHEOT 2, containing in its own form a stabilizer Ho) nox (f3P), the composition is not sufficiently effective against teestrostrum. this stabilize and the additive is ineffective against the light destruction of polyethylene. The purpose of the invention is to increase the resistance to thermal and light destruction. The goal is achieved by the fact that the polymer composite qi comprising low density polyethylene and stabvlvziruyuschuyu additive contains as stabilizing additive diphenyl ef1f oL - (and -oksibenzalansh1ino) -oksv

benziphosphonic acid, with the following ratio of components weight. %:

Potgatipen low

density99-99.9

Difeshovy ether

ci - (P-oxyb-

zalanipino) -ox№benzipfosfonovoy

acids 0.1-1

The presence in the specified compound at the same time of the phenyl, secondary and hydroxyl groups, as well as of pyvalent phosphorus suggests that this compound should possess both antioxidant, heat stabilizing, and UV-absorbing properties. The specified connection receive on the basis of salicylic aldehyde p -aminophenol and diphenylphosphite in two stages according to the following scheme.

Getting salianilide - p-aminophenol by the interaction of salicylic aldehyde with p-aminophenol by a known method by the reaction

593

RMI-5 and RMI-250. Under these conditions, a polyethylene polymer composition, stabilized by the industrial stabilizer iHoHOKCcM WSP, is tested.

Example, Polymer composite chi consists of, weight. %:

Diphenyl ether

oL - (p-oxybenzalanilino) -oxibene and phosphonic acid 0,1

Polyethylene PENP99,9

The test results are presented in the table.

It follows from the table that after light and thermal aging, the physicomechanical parameters of the proposed polymer composition change slightly and retain their stabilizing activity in contrast to the well-known nonokа WSP polymer composition.

PRI mme R 2. A polymer composition is composed by weight. %:

Diphenyl ether

d - (g | -oxiben 5 "

sala moiBHo) -oxvbenzylphosphonoBoic acid 0.5

Polyethylene PENP99,5

The test results are presented in the table.

It follows from the table that we propose a polymer compound that possesses a stablizative effect against thermal and light destruction of polyethylene and, after 500 hours of exposure, retains its initial physicomechanical properties, in contrast to the known polymer composition based on Nonox WSP.

PRI me R 3. A polymer composition is composed by weight. %: Diphenyl ester oL - (p-oxybenzal: ashshino) -scibenzyl - phosphonic acid1

Polyethylene LDP99, O

The table lists the results of testing the synthesized compound as a stabilizer of low density polyethylene.

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Claims (2)

The tests show that the proposed composite is effective against the thermal and light degradation of polyethylene and retains the initial physicomechanical properties, in contrast to the known polymer composition based on Nonox W5P. Thus, based on the above examples, we can conclude that the proposed polymer composition The basis of polyethylene and diphenyl ether N - (p-oxybenzalashino) -oxy benzylphosphonic acid is very effective at the same time against the thermal and light destruction of polyethylene and awes action exceeds the known. When applying the proposed composition after dosing), the heat and light aging of the samples, the crime preserves its physical and mechanical parameters, at a time, as with syringes | e {ii known proprikhoda t worsen rye fkviko - - -J ;;; , - mechanical and dielectric / csvikh properties. The invention Polymer composition, including low density polyethylene and a stabilizing additive, is different in that in order to increase resistance to thermal and light destruction, it contains d - (p-ox-benzallate-shino) -oxybenzophosphonic acid diphenyl ester as a stabilizing additive. The following ratio of components, weight,%: Low-density polyethylene 99-99.9 Diphenyl ester oL (tt hydroxybenzal a)) oxybenzylphosphonic acid. Sources of information taken into account in the examination 1. Application of Japan 51-10864, cl. 25 (1) C, publ. 1976. 2. Voigt I. Stabilization of synthetic polymers against the action of light and heat. L., Himi, 1972, p. 499 (about .-, ", totype).