SU432253A1 - COMPOSITION FOR THE MANUFACTURE OF LINOLEUM - Google Patents

Description

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The invention relates to the field of creating compositions for polymeric materials (linoleum).

The known composition for the manufacture of linoleum, containing alkyd resin, wood flour, cork flour, lime powder, pigments, crushed linoleum waste, technological additives, etc. However, to achieve the desired physical and mechanical properties of hardness, elasticity, flexibility, etc. When using this composition, linoleum after calendering (applying linoleum mass to the fabric) is subjected to heat treatment (40-80 hours) for hours-long in drying chambers at 60-80 ° C. Heat treatment accelerates the process of spatial polymerization of alkyd resin, i.e., an increase in the proportion of the three-dimensional polymer in the mass, which determines the strength properties of linoleum.

However, even after prolonged heat treatment, the hardness of alkyd linoleum often remains quite low, which is particularly evident in tests of this material for resistance to indentation of a flat indenter under a load of 100 kgf / cm. And only as natural aging is already in use, the alkyd linoleum gains sufficiently high strength (and, of course, hardness) due to

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the proportion of three-dimensional polymer to 50% and above. But by the time this happens, linoleum is often already damaged (holes from furniture, heels, etc.).

Therefore, the necessary strength properties must be achieved before using linoleum as a finished material.

The aim of the present invention is such a composition of linoleum mass to produce alkyd (or glyphthalic) linoleum, which, by using a generally available, inexpensive additive to the raw mix, would dramatically speed up the process of spatial zeroing.

(increasing the proportion of the three-dimensional polymer) alkyd (glyptal) resin so that, immediately after calendering, linoleum has the required physical and mechanical properties.

According to the proposed method, it is recommended to introduce into the composition for the manufacture of linoleum, due to part of the mineral fillers, the diatomite calcined after preliminary grinding and drying in an amount of 2-

8% by weight of the raw mix. Diatomite must be calcined before the loss of crystallization water and introduced into the mixture simultaneously with other fillers. The proposed composition makes it possible to shorten the duration of heat treatment of a linoleum web, and in some cases it is necessary to obtain physical and mechanical properties even without heat treatment, i.e., immediately after applying the litholeum mass to the fabric by calendering. At the same time; An appreciable increase in the hardness of the finished material is achieved, including in determining the hardness by depth

Linoleum components

indentation into the linoleum of the flat indenter of the node with a pressure of 100 kgf / cm.

Examples 1, 2, 3. For comparison, four samples of alkyd linoleum are ready, including three with the addition of prokaley) 1st diatomite. The composition of the samples and the data of the results of their tests are given in the tables.

Table 1

Alkyd resin

L1s1 and wood

Flour cork

ocher

Lnioleum pruning ground

Lime powder nanofiller

Technological additives (polyethylene n.,., Coumarone resin)

Diatomite calcined Results of physical and mechanical testing of samples

 After heat treatment for 13 hours. After heat treatment for 7 hours.

As follows from the above examples, the replacement of part of the mineral filler (2–8%) by calcined diatomite in the composition of linoleum mass provides: a) an increase in the hardness of linoleum samples when tested on the TShR-2 device 1.5-2 times, and its elasticity is more than 2 times; b) increase in the hardness of linoleum samples when tested on the PV-2 device 2.5-3 times, and recoverability 1.5-1.7 times; c) reduction of abrasion by 1.5-2 times; d) samples with the addition of diatomite have an increased (by 30-50%) on

compared with the reference water absorption, the value of which, however, is lower than that supplied by the norm.

Subject invention

Composition for the manufacture of linoleum, containing, and alkyd resin, wood flour, cork flour, pigment, lime powder, linoleum trimming and technological additives, characterized in that, in order to reduce production and increase Table 2 linoleum without heat treatment 5 without quality linoleum additional heat treatment, diatomite calcined before the loss of crystallization water is introduced into it in the following ratio of components (wt.%): 5 Alkyd resin 26-28 Wood flour 24-25 Flour sponge 6-7 6 Pigment 67 Lime powder ok - a filler 15-20 Trimmings of linoleum ground 8-10 Technological additives 3-5 Diatomite, calcined until the loss of crystallisation water 2-8