SU1024465A1 - Composition for making table tennis balls - Google Patents

Abstract

COMPOSITION FOR SEMI 1ENIYA balls for table tennis, comprising celluloid collodion, camphor, zinc oxide, castor maelo and ethanol otlichayuyua in that, to obtain m whose elevated physico-me anicheskimi data were obtained, the composition further comprises a transesterification product of dibutyl propylene glycol in the following ratio, wt.%; Celluloid colloquin. 53.9-58.0 Camphor7.9-8.1 Re-etherification product of propylene dibutyl adipate7, 2-9.5 glycol 2.2-3.6 Zinc oxide 0.2-0.4 Castor oil V) Ethanol Else

Description

This invention relates to a composition based on cellulose nitrate. used for the production of cellulode, from which other consumer goods can be made for table tennis.

A known composition based on cellulose nitrate, which includes, in May, 4% t cellulose nitrate (celluloid colloxylin) 75; camphor 25 i.

The known composition does not allow to obtain celluloid with high physicomechanical indicators, from which it would be possible to make table tennis balls with a rebound height indicator of 235 mm.

Closest to the invention is a composition containing celluloid colloxylin, camphor, zinc oxide, castor m; Asl and ethanol, in the following ratio of components, May,% Celluloid colloxylin 54, 2-55.8 Synthetic

camphor17,3-18.6

Zinc oxide1.96

Castor oil 0.6-0.8 Ethanol 23,0-26,0

However, this composition also makes it possible to obtain celluloid for table tennis with the required physicomechanical properties, which would make it possible to manufacture table tennis balls with.

rebound height indicator not lower than 235 mm.

The aim of the invention is to obtain table tennis balls with a high physical and mechanical properties.

The goal is achieved by the fact that the composition for obtaining table tennis balls, containing celluloid colloxylin, camphor, zinc oxide, castor oil and ethanol, additionally contains the product of transesterification of dibutyl adipate with propylene glycol (PPA-4) at the next 1 (and the ratio of components, May .%:

Celluloid colloxylin 53, 9-58,0 Camphor7,9-8,1 The product is re-net,. . for the modification of dibutyl adipicate by propylene glycol 7.2-9.5 Zinc oxide 2, .2-3.6 Castor oil 0.2-0 / 4 Ethanol Else The preparation of celluloid pulp is carried out as follows.

Camphor, PPA-4, castor oil, dehydrated celluloid colloxylin, zinc oxide are loaded into the heated laboratory mixer. Ethanol is dosed with the ethanol contained in the dehydrated colloxylin.

In tab. 1 shows the content of 35 components in the composition, wt.%.

Table 1

Colloxylin Celluloid

Camphor

PPA-4

Zinc oxide

Castor oil

Ethanol

When the ingredients of the compositions are loaded, they are mixed in a laboratory heated mixer for 1-2 hours at 60-70 ° C,

55.5

58.0

56.3

3.9 8.1 7.9 8.0 8.0

8.5 7.2 9.5 8.3 2.7 3.6

2.1 2.2 0.3

0.4 0.2

0.4

26.0

24.0

23.0 5.9

The resulting mass is passed through a filter press at 60-70 G and subjected to rolling on friction rollers. 5 Celluloid blocks are brewed.

31024465

at 85-90 0 and pressure 1.0-1.5 MPa From the obtained sheets of celluloid

for 2 hours Welded blocks of stro-made tennis m chi. Fizigayut on a planing machine for sheet-mechanical indicators with a caliper O, 5t 0.02 mm. Then the sheets of fresh celluloid and the height of X-celluloid are dried at 55-65 0, the right tennis weights are given

at 85 - and pressure 1.6-2.0 MPa, 5c table. 2

.Table2 As can be seen from the table, the physicomechanical indicators of the composition are higher by 15–20% than in the known composition; . The use of the proposed composition in the production of celluloid for table tennis will make it possible to manufacture tennis balls with a rebound height {240 cm per y) of international standards (brand Mas / Ter).

Claims (2)

COMPOSITION FOR BALL-tennis table comprising a celluloid collodion, camphor, zinc oxide, castor ^May-1 lo and ethanol, which distinguishes from I that, in order to obtain balls with improved physical and mechanical properties, the composition additionally contains up to transesterification product of dibutyl propylene glycol in the following ratio, wt.%: Celluloid colloxylin Camphor Transesterification product of dibutyl adipate with propylene glycol Zinc oxide Castor oil Ethanol 53.9-58.0 7.9-8.1 7.2- 9.5 2.2- 3.6 0.2-0.4 Else>