SU628150A1 - Polymer composition - Google Patents

Description

This invention relates to the field of processing tetrmoplastics and relates to the preparation of crosslinked polyvinyl chloride. A crosslinking composition containing polyvinyl chloride (PVC) is known, the crosslinking agent is triallyl citrate and di-trash-butyl peroxide. The materials obtained from this composition, possess x, oromash, physical and mechanical properties, but insufficient self-extinguishing. Also known is a composition containing PVC, a crosslinking agent is glycylallyl ether and an initiator is di-mert-butyl peroxide. Closest to the invention in composition is a composition containing polyvinyl chloride, a crosslinking agent -1-allyloxy-2-acetatechloropropane-3 and an initiator - di-shret-butyl peroxide. The known composition has good strength and non-inflammability. The disadvantage of the composition is low elasticity. The aim of the invention is to increase the elasticity of the composition. The goal is achieved by the fact that, as a crosslinking agent, the composition contains trichloroacetic acid allylic ester in the following ratio of components in it. h: Polyvinyl chloride 100 Triple chloroacetic acid allyl ester 10-30 Di-tris-butyl peroxide 0.05-0.1 The synthesis of three-chloro acetic acid allyl ether (ATHAC) is carried out in one stage from readily available industrial products: allyl alcohol and three chlorohydrocene is also used and I have been used and I will be used and I will be used and I will be used and I will be used to use the same allyl alcohol and three-chloro acetic acid). COO-jj CHj0 Cl AND / CH-CH2-0-CC-Cl + HjO Triple-chloroacetic acid allyl ester is a clear liquid with a low specific odor, readily soluble in organic solvents. Mol. Weight 203.5, specific gravity 1.353, refractive index 1.4678, bp. 46-48 C / O, 5 mm, double bond content 13.2 and chlorine 52.3%. 3 The presence of double bonds and a high chlorine content of 52.3% in the synthesized monomer (AETC) allows to obtain a crosslinked self-attenuating polymer composition. Example 1. Mix 100 weight.h. PVC with a constant Fikentscher 70,20 weight.h. trichloro allyl ester of acetic acid and 0.5 weight.h. di-tri-butyl peroxide initiator (DTBP). Modification of PVC with trichloroacetic acid allylic ester was carried out in the process of thermal plasticization on microvalts for 5 minutes. In the process of thermal plasticization, the composition of technological difficulties in the form of adhesion of film 0 on the rollers is not observed. The mixture rolls well and is easily removed from the rolls. The resulting film is pressed at a temperature and pressure of 50 kgf / cm for 30 minutes. Example2. Under the conditions of Example 1, a PVC composition was prepared with 10 wt. 4 m. Trichloroacetic acid allyl ester modifier and 0.05 wt.h DTBP. Example Z. In the conditions of Example 1 a PVC composition is prepared with 30 parts by weight. trichloroacetic acid allyl ester modifier and 0.05 weight parts. DTBP. The results of physico-mechanical studies of the compositions obtained are presented in the table.

490

650

150 10 135

240

Flammability, with

Gel fraction,

80

Claims (1)

% As can be seen from the table, the modified PVC has a high elasticity with preservation of high strength. The invention Polymer composition containing polyvinyl chloride, crosslinked agent and initiator - di-mpem-butyl peroxide stick off with the fact that, with 530 590 520-630 80 185 25-95 220 170 65 58 in order to increase the elasticity of the composition, as a crosslinking agent, it contains trichloroacetic acid allyl ester in the following ratio of components, parts by weight: Polyvinyl chloride 100 Trichloroacetic acid allyl ester 10-30 Dihydrogen peroxide 0.05-0.1