SU931732A1 - Plastisol composition - Google Patents

Description

This invention relates to compositions based on PVC polyvinyl chloride converted into products according to a layer of ash technology. Known plastisol compositions comprising prlivinylhlorid modifier - nitrile rubber and vulcanized bonding agent - zinc oxide Q. The closest to the proposed is a plastisol composition comprising, ISDA 60 PVC, 28 dioctylphthalate (DOP), 12 modifier - a mixture of triethylene glycol dimethacrylate (TGM-W ) and diethylene glycol maleate dipipate (SKPS-20) in a ratio of 2: 3 I. The disadvantages of the known plastisols are the high viscosity and insufficient strength of the cured plastigel. The purpose of the invention is to reduce the viscosity of the plastizol and increase the strength of the cured plastic. The goal is achieved by the fact that the plastisol composition, including polyvinylchloride, dioctyl phthalate and modifier, as the latter contains a mixture of polyhexamethylene diisocyanate and polyethylene glycol in the following ratio, wt .: i + 0-BO Poliviene RID 1.0-3.0 Polyethylene glycol Polyhexamethylene, and polyethylene glycol 5-2.0 diisocyanate, Dioctyl phthalate Else As a polyhexamethylene diisocyanate (PGMDI), the composition contains a compound of the formula C, CK (NaC) - | -N (CH-i ft-NCO

393

where n is 12-17 content

NCO groups 11.3.

As polyethylene glycol, the composition is soderite PEG-300 Iol ethylene glycol.

The composition may also include additives for the intended purpose, such as stabilizers, fillers, colorants, lubricants, etc.

732.4

A plastisol composition containing PVC.DOF, PGMDI and PEG-300 is prepared by sequential introduction of the components with mixing under normal conditions. Then, the resulting plastisol is cured at 100 ° C for 7 memes and sintered at 17PS for k min. The composition of the compositions and their physico-mechanical properties are given in Tables 1 and 2.

Table 1

it8.08 k8, Q8, kk 2, k

Viscosity plastisol P

on the day of cooking

on day 10

Strength plastigel, kg / cm

Relative

elongation,% For comparison, properties of the same initial viscosity are given.

60 kQ

60

33.2

2

3

1.8

table 2

, 9 58

87 45 50 10.1 6 103 85 120

58

28.1

thirty

70

420

Claims (2)

300 230 93 unmodified compositions with 59 Of the presented in table. 1 and 2 of examples 3 and 4, referring to plastisols with the same ratio of polyvinyl chloride: plasticizer, it can be seen that the viscosity of the proposed plastisol as compared to unmodified decreases from 87 to 58 P {33.3) on the 1st day, known from 50 to kS P (by 10%). On the 10th day, the viscosity of the known plastisol increases by 0 P (by 88.8%), and the proposed one - by 6 P (by 10.3%). Thus, the introduction of a plastisol composition containing polyvinyl chloride, dioctyl phthalate and a modifier, as the last mixture of polyethylene glycol and polyhexamethylene diisocyanate, in a certain ratio allows to reduce the viscosity ppstsmol and stabilize it over time. In addition, the introduction of the specified modifier increases the strength of the cured plastigel. 2 Formula invention plastisol composition comprising a polyvinyl chloride, dioctylphthalate, and a modifier, characterized in that, in order to reduce the viscosity of the plastisol and enhance the strength of the cured plastigel, the composition as a modifier comprises a mixture poligeksametilendiizotsianata and polyethylene glycol in the following ratio, wt.%: Polyvinyl chloride D0-60 Polyethylene glycol 1.0-3.0 Polyhexamethylene diisocyanate0, 5-2.0 Dioctyl phthalate Else Sources of information taken into account during the examination 1.US Patent N 35052 7, cl. 2b-3,2, pub. 1970. 2. Gorshkov V.S. and others. Modification of PVC plastisol. - Plastics, 1977, 6, p.8 (prototype)