SU627760A3 - Polymer composition - Google Patents

Description

i

The invention relates to the preparation of polymer compositions and the basis of a copolymer of styrene, acrylonigril and butadiene (ABS resin), which have good impact resistance.

Known polymer composition containing 5-60 wt. % copolymer of acrylonitrile, butadiene and styrene and 4095 weight. % polyvinyl chloride (l1.

The composition is also known, including 3-2 O wt.% Copolymer of styrene, acrylonitrile and butadiene, 4 O-98 wt.% Grafted copolymer of vinyl chloride and ethylene-ethyl acrylate copolymer and 0-57 wt. % Vinyl chloride or copolymer homopolymer with another polymerizable monomer 2.

Known compositions are not high enough physico-mechanical parameters.

The purpose of the invention is to improve the physicomechanical properties of the compositions by. ABS based resin.

This goal is achieved by the fact that, as a vinyl polymer, the composite contains a suspension polymerization product of vinyl chloride in the presence of an alkyl acrylate copolymer with 2-8 carbon atoms, with an ethylenically saturated monomer and a copolymer of vinyl chloride containing a copolymer of polyvinyl chloride with 86-93 weight. % methyl methacrylate and 7-14 wt. % n-butyl acrylate. The ratio of components in the composition is as follows: weight%: styrene copolymer, acrylonitrile and butadiene 20-90, the product of suspension polymerization of vinyl chloride in the presence of an alkyl acrylate copolymer of 9.5-6O, polyvinyl chloride copolymer of 0.5-3O.

The invention is illustrated in the examples given below.

Example. 1085 kg of distilled water, 1738 g of a bis-tridecyl ester of sulfonate-succinic acid (TR 7O aerosol), 125O g of potassium persulfate and 5OO g of sodium bicarbonate are loaded into an 1893-liter reactor equipped with a stirrer. Mix 1O, 12 kg of butylene gpikoldiakripat with 499 kg of boogilacripag. 90.7 kg of this mixture enter g into the reactor. The reactor is closed and heated to 70 ° C. The rest of the monomer is poured. The temperature is maintained at 70 ° C for 30 minutes, then the reactor is cooled to room temperature. Latex is poured, containing solids in it is 31%. In a 15140-liter reactor, 2948 kg of latex prepared by the above method, 6.35 kg of methylcellulose-containing suspending agent dissolved in water and 2.27 kg of azoisobutyronitrile are introduced. The reactor is closed, create a vacuum 381-5O8 mm Hg and maintain this pressure for 15 minutes. The pressure is then increased to atmospheric by the addition of vinyl chloride gas, after which the pressure is reduced to the same level and maintained for 5 minutes. Next, the remaining amount of vinyl chloride is introduced. The total amount in it is 2857 kg. The mixture is stirred and heated to 72.8 ° C, butylated hydroxytoluo is added, cooled to 30 ° C, and the product of suspension polymerization of vinyl chloride is recovered. Example 2. In the reactor load 100 weight. including butyl acrylate, 730 weight.h. distilled water, 2 wt. including butylene glycol diacrylate, 32 wt. h. Aerosol T R 7 Oh, 0.42 weight. including potassium persulfate, 0.2 weight. including NuHCOj and 0,004 weight Re50ts. Then alternately create a vacuum of 660 mm Hg. Art. and fill the reactor with nitrogen, heat to 30 ° C and add with stirring NQ HSo J. Next, the temperature is raised to 50 ° C and kept at this temperature until the polymerization conpa. The reactor is cooled and loaded into 277 wt. h, distilled water, 45 wt. including suspending agent and 0.16 weight. including lauroyl peroxide. Then 158 wt. including vinyl chloride, the mixture was stirred at 60 ° C and a pressure of 0, 25 kg / cm, 11 weight% was added. including bottled hydroxytoluene and unreacted vinyl chloride is removed. EXAMPLE 3: 0.089 wt. Was added to the reactor, including suspending agent dissolved in water, and 0.038 wt. including azoisobutyronitrile, create a discharge, enter 100 weight. including vinyl chloride and polymerization. The unreacted monomer is removed and another 0.034 wt. Is added. including aabisisobutyronitrile and a mixture of 0.005 weight. including lauryl mercaptan with 29.6 wt. including methyl methacrylate and 4.96 weight. h butyl acrylate. The mixture is heated to 7–5 ° C and held for 4 hours. A copolymer of polyvinyl chloride is obtained. In tab. 1 shows examples of formulations of compositions containing ABS resin and the components obtained in examples 1-3, in table 2 - the physico-mechanical properties of the compositions. PRI me R 4 The product is obtained analogously to example 3, but the components are taken during the first polymerization in the following ratio, weight. including: Vinyl chloride100 Distilled water257 Suspending agent, 093 Lzobisisobutyronitrile0, O22 in the second polymerization in the following ratio, wt. h; Methyl methacrylate3669 Azobisisobutyronitrile 0.11 Lauryl mercaptan 0.05 Example 5. A series of polymer compositions are prepared from an ABS resin, a component of Example 1 and a copolymer of polyvinyl chloride with meth (acrylate) obtained in Example 5. 3 shows the formulation of the compositions, in table 4 their properties. Table

Copolymer of styrene, acrylonitrile and butadiene (ABS)

Component for example: 1

70

50

70

40

20

25

ten

1O

. five

Tensile strength at yield, psi

Yield stress, /

Tensile strength at break, psi

Elongation at break,%

Impact viscosity 1/8 inch notch, fug-lb / inch

Shock tensile strength, pounds per pound

Bending modulus

-five

FUNG / KVDUYM 10

Tabl.a2

14.3

4.7

5.4

19O

150

150

2.7

2.9

2.94

Claims (2)

1. The patent of Germany No. 2000468, cl. C 08 F 29/18, 1971. 2. US patent number 3444267, cl. 260-876, 1969.