SU1705251A1 - Material for glass protection - Google Patents

Abstract

The invention relates to the creation of materials based on polyethylene to protect glass. In order to increase the adhesion to glass and the processability of processing, the material for protecting glass contains, by weight: polyethylene 100.0, polybasic aromatic carboxylic acid 0.5-6.5. The material has an adhesion of 980-1050 N / m, a melt index of 1.25-1.53 g / 10 min. 2 tab.

Description

The invention relates to the creation of polyethylene-based materials for the protection of glass products (pipes, inserts, etc.) through which aggressive liquids are transported, and can be used in various industries, especially in the chemical, food and microbiological industries, to prevent scattering of glass fragments in case of mechanical damage to glassware.

Known pipes of non-metallic materials (plastic, fiberglass and technical glass). Technical glass piping has high corrosion resistance, gas tightness, increased throughput and ensures the purity of transported media.

The disadvantage of glass pipelines is low resistance to dynamic loads, which entails not only an irreparable loss of the products transported through them, but can lead to damage to nearby equipment.

and accidents, especially if highly efficient media are transported through the pipeline. Perhaps even the spontaneous destruction of glass pipes from visible external causes.

To harden glass products, their surface is protected with polymeric coatings. In this case, glass polymer products remove a number of safety restrictions, significantly expand their field of application, since glass polymer products have a higher impact strength, and when the glass base is destroyed, the flow of the media transported through them and the scatter of fragments are eliminated.

However, polymer coatings have low adheion and physico-mechanical properties, low thermal and light resistance.

The closest to the proposed technical essence and the achieved effect is a material for coatings with

Yo

H |

eight

YU

ate

holding 100 ma.ch. polyethylene and 0.1-1.3 wt. ferrocene or its derivative.

However, coatings based on this material have relatively low adhesion to glass and processability (low melt index).

The purpose of the invention is to increase the adhesion to glass and the processability of processing.

The goal is achieved by the fact that the material for coatings, including polyethylene and the target additive, contains a polybasic aromatic carboxylic acid as a target additive in the following ratio of components, wt.h .:

Polyethylene100

Multiple basis

aromatic

carboxylic acid0,3-6,5

Simultaneously with the specified target additive, it is possible to introduce known ingredients into the composition of the material: plasticizers, fillers, pigments, etc.

The components of the material are taken in the amounts indicated in Table 1 and thoroughly mixed in a mixer at room temperature for 10 minutes. From the prepared material (composition) molded skins. Before applying the polymer coating, the glass surface is degreased with alcohol.

Low pressure polyethylene (HDPE, GOST 16338-77), phthalic acid (FC), isophthalic acid (IFA), mellitic acid (MK), terephthalic acid (TKM), trimellitic acid (TMK), benzthron (BZ), benzenepentacarboxylic acid (BK), homimellitic acid (HA).

Adhesion (adhesive strength) is determined by peeling the coating from the substrate (glass) at room temperature. Melt flow is determined on an IIRT-2 instrument.

Destructive stress during stretching and elongation at break are determined on specimens made in the form of double-sided spatulas on a ZP-40 tensile machine at the speed of movement of the movable clamp 54

mm / min

Specific formulations of the proposed material for coatings are given in Table 1. The properties of the proposed material for coatings are given in Table 2.

From Table 2 it can be seen that the proposed material for coatings has a higher adhesion to glass and a better melt flowability (processability), as compared to the known.

The introduction of these components into the proposed material above and below the permissible concentrations reduces the adhesion to glass, the processability of processing and the physicomechanical characteristics (failure stress due to stretching and relative elongation at break).

The application of the proposed material for coatings improves the safety, reliability and durability of glass products, which contributes to its introduction into industry and agriculture. The approximate annual economic effect from the application of the proposed material for coatings on one

Claims (1)

by increasing the reliability and durability of glass products is about 120 thousand rubles. Claims Glass protection material, including polyethylene and a modifier, characterized in that, in order to increase glass adhesion and processability, it contains a polybasic aromatic modifier carboxylic acid in the following ratio of components, m Polyethylene Multiple aromatic carboxylic acid 100 0.3-6.5 Table 1  Ferrocene Table 2