SU1423561A1 - Polymeric compound based on styrene-butadiene latex - Google Patents

Description

(21) 4111278 / 23-05

(22) 06.20.86

(46) 09/15/88, Bull. Number 34

(71) Research Institute of Rubber and Latex Products

and Voronezh branch of the All-Union Scientific Research Institute of Synthetic Rubber

(72) V.L.Kuznetsov, G.S.Tikhomirov, G.S.Osokina, L.F. Khomenko, E.A.Pr. Kina, V.M. Lavrova, G.M. Grachev, Y. A.Mokeichev, V.S.Kurokhtin, L.M. Levin, V.P.Stroganov and M.A.Tolkacheva

(53) 678.041.2: 678.762 (088.8)

(56) US Patent No. 4128520,

cl. 210-296, publ. 1978.,:

US patent No. 4321181, CL.524-549, publ. 1978

USSR Author's Certificate No. 348579, cl. From 08 L to 9/04, 1970.

(54) POLYMER COMPOSITION BASED ON BUTADIEN-STYRENE LATEX

(57) The invention relates to the rubber industry, in particular to polymeric compositions based on butadiene-styrene latex, including a modifier. The invention improves the mechanical stability of the composition and expands the range of viscosity properties by using a butadiene-styrene latex polymer composition as a modifier of butadiene copolymer, methacrylic acid styrene and methyl methacrylate with a comonomer weight ratio of 25: (15-25): 35: (15-25) respectively, with a degree of neutralization of monomers of 10% in the amount of 0.3-1.0 wt.h. on 100 ma.ch. dry matter latex. 5 tab.

with

Sd

05

The invention relates to rubber industry, in particular, to half-round copes on the basis of buta, a cien-styrene patex, which turns off the modifier, which are | They are used to fit carpeted products.

The purpose of the invention is to improve the fur of the sustainability of the composition and in its viscosity in viscosity properties.

According to the invention, a copolymer of butadiene, styrene, methacrylate acid (MAC) and methyl methacrylate (MMA) is used as the modifier, as follows: monomer ratio, mAh; 25g (15-25): 35: (15-25) in the case of 0.1-1.0 math. dry matter per 100 mah. dry matter latex. This modifier is synthesized using the components listed in Table 1,

The polymerization is carried out at 5 ° C to a dry matter content of 25-26.5%, after which the temperature is raised to 70 ° C and the process continues for 5 | min At the end of the polymerization process, a 5% aqueous solution of potash is injected based on the degree of neutralization of methacrylic acid units of 10%.

The characteristics of the thickening modifiers, depending on the composition, are given in Table 2; The properties of the proposed modification | o and modified - C-50 latexes and 70/2 century depending on

 c | for neutralization of monomers are presented in Table 3;

The proposed chetfekhkomponentny modifier (Table 2 code, IV, V, V1),

joluchenny when the degree of neutralization {"onomers. 10% (Table 3) is distinguished by low toxicity, characterized by a content of non-polymerized monomers. The proposed modifier has a pH of 7.6 with a content of cyan-: these substances 22–25%, a viscosity from 2 to 5 mPa.s.

As synthetic latex-Fov, BS-50 butadiene-styrene onatex and butadiene-styrene-carbo-) Xylate latex BSK-70/2 are used,

The introduction of the proposed modi-topa in latex gives them;

five

o

50

thixotropic properties: the viscosity of latexes containing the modifier varies over a wide range depending on the mixing conditions. The data are given in table 4. This makes it possible to use the proposed modifier in various compositions, for example, in coupling agents: compositions where high viscosity makes it possible to apply a latex composition only on one side of the material, or in impregnating compositions with a sufficiently low viscosity required when using them. as a binder component in the production of nonwovens,

The effect of the modifier dosage on the mechanical stability of the compositions and the skeleton of the finished products are presented in Table 5.

The data in Table 5 illustrate the stabilizing effect of the proposed modifier, which allows reducing losses associated with

coagulation latex.

I

The proposed modifier can be used on carpet plants of the country. The introduction of the modifier into production will not cause difficulties, since it can be produced at plants that manufacture synthetic latexes according to the usual technology, which does not require additional equipment, using monomers used to produce synthetic latexes.

0

five

Claims (1)

40 claims The polymer composition based on butadiene-styrene latex, which includes a modifier, is required so that, in order to increase the mechanical stability of the composition and improve its viscosity properties, the latter contains as a modifier butadiene copolymer , styrene, methacrylic acid and methyl methacrylate with a mass ratio of comonomers 25: 15-25: 35:: 15-25, respectively, with a degree of neutralization of monomers of 10% in the amount of 0.3-1, About mac.h. on 100 ma.ch. dry matter latex. Components Butadiene Styrene Methacrylic acid (MAC) Methyl methacrylate (MMA) Alkylsulfonate (sulfonol NPtf Tert-dodecyl mercaptan (TDM) Potassium persulphate Rongalite Trnlon B Water TDM is introduced fractionally: in the aqueous phase 0.4 wt.h .; with a monomer conversion of 30% 0.3 wt.h.} upon a monomer conversion of 60% 0.3 mas.h. Sample cipher I .Table 1 Amount, mph. 25 15-25 35 15-25 4.0 1.0 0.05 0.05 0.06 300 t a fi l n c a one; " sh her "about p4 cho SO chg - ABOUT VO N CS mid N § 00 about tn (N I 5 CM ech lU five ABOUT CM about h Oi 0 ft e 1 vC 00 in  - POv n I I p i