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Copolymer rubber and method for producing same, and crosslinked rubber composition

A manufacturing method and technology for copolymers, applied in the field of cross-linked rubber products, can solve problems such as high reactivity and gelation, and achieve the effects of excellent dispersibility and excellent wear resistance

Active Publication Date: 2019-06-18
NIPPON STEEL CHEMICALL &MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the reactivity is excessively high, and there is a possibility of gelation in the crosslinked rubber particles and the rubber composition.

Method used

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  • Copolymer rubber and method for producing same, and crosslinked rubber composition
  • Copolymer rubber and method for producing same, and crosslinked rubber composition
  • Copolymer rubber and method for producing same, and crosslinked rubber composition

Examples

Experimental program
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Effect test

Embodiment

[0113] Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples. In addition, the part in each example is a weight part unless otherwise indicated, and the evaluation of each physical property was performed by the method shown below.

[0114] 1) Molecular weight and molecular weight distribution

[0115] Molecular weight and molecular weight distribution were measured using GPC (manufactured by Tosoh, HLC-8220GPC), using tetrahydrofuran (Tetrahydrofuran, THF) in the solvent, and using a monodisperse polymer at a flow rate of 1.0 ml / min and a column temperature of 38°C. A calibration curve for styrene was used.

[0116] 2) Structure of polyfunctional vinyl aromatic copolymer

[0117] Using the JNM-LA600 nuclear magnetic resonance spectrometer manufactured by JEOL, through 13 C-nuclearmagnetic resonance (NMR) and 1 H-NMR analysis to determine. As a vehicle, use chloroform-d 1 , and the resonance line of tetram...

Synthetic example 1

[0129] 320.5 mL of DVB-810 (manufactured by Nippon Steel & Sumikin Chemicals, with a divinylbenzene content of 81.0% by weight) (1.82 moles of divinylbenzene and 0.43 moles of ethylvinylbenzene), n-butyl acetate 0.28 moles (36.9 mL) and 140 mL of toluene were put into a 1.0 L reactor, and a solution in which 40 millimoles of methanesulfonic acid was dissolved in 0.12 moles (15.7 mL) of n-butyl acetate was added at 70°C to react 6 Hour. After stopping the polymerization solution with calcium hydroxide, it filtered using activated alumina as a filter aid. Thereafter, 22.6 g of a soluble polyfunctional vinyl aromatic copolymer (copolymer X1) was obtained by devolatilization under reduced pressure at 60°C.

[0130] Mn of the obtained copolymer X1 was 1085, Mw was 12400, and Mw / Mn was 11.4. Through GC analysis, GPC measurement, FT-IR, 13 C-NMR and 1 H-NMR analysis confirmed that the copolymer X has the following vinyl group-containing structural unit (a1) and terminal group (d1...

Synthetic example 2

[0139] Put 276.4 mL of DVB-810, 86.2 mL of toluene, and 93.74 mL of anisole into a 1.0 L reactor, add a solution of 10 mmol of methanesulfonic acid dissolved in 2 mL of toluene at 50°C, and react for 4 hours , except that, the copolymer X2 was obtained by the same method as in Synthesis Example 1.

[0140] Mn of the obtained copolymer X2 was 1000, Mw was 18800, and Mw / Mn was 18.8. Through GC analysis, GPC measurement, FT-IR, 13 C-NMR and 1 H-NMR analysis confirmed that the copolymer X2 has the same vinyl group-containing structural unit (a1) derived from the divinyl aromatic compound (a) as in Synthesis Example 1, and the following Terminal group (d3).

[0141] [chemical 9]

[0142]

[0143] (* is the bonding part with the main chain of the copolymer)

[0144] Copolymer X2 contained 64.0 mol % of structural units (a) derived from divinylbenzene components with respect to all structures, and contained 2.0 terminal structural groups (d3) derived from anisole per molecule...

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Abstract

Provided are: a copolymer rubber which has all of processability, strength and homogeneity and is suitable as a modifier for resins or the like; and a crosslinked rubber composition having excellent mechanical strength, wear resistance and the like. A copolymer rubber produced by copolymerizing a raw material comprising a polyfunctional vinyl aromatic copolymer (A), a conjugated diene compound (B)and an aromatic vinyl compound (C), wherein the polyfunctional vinyl aromatic copolymer (A) contains structural units (a) each derived from a divinyl aromatic compound, structural units (b) each derived from a monovinyl aromatic compound and structural units (d) each constituting a terminal, the structural units (a) are contained in an amount of 2 mol% or more and less than 95 mol%, at least someof the structural units (a) are vinyl-group-containing structural units (a1) and at least some of the remaining structural units are structural units each constituting the structural unit (d), and the number average molecular weight of the copolymer rubber is 300 to 100000.

Description

technical field [0001] The present invention relates to a copolymer rubber excellent in processability and excellent in tensile strength and wear resistance, and a crosslinked rubber product obtained by crosslinking the copolymer rubber. Background technique [0002] Styrene butadiene rubber (SBR), butadiene rubber (BR), isoprene rubber (IR), styrene-isoprene rubber and other conjugated dienes Rubber has excellent abrasion resistance, elasticity, and water resistance, and can be used in various applications such as molding materials and resin modifiers. [0003] One of the main uses of the conjugated diene rubber is tires for automobiles. Examples of properties required for tires include mechanical strength, abrasion resistance, wet grip, and the like (hereinafter also collectively referred to as strength, etc.). Furthermore, in recent years, the development of tires (so-called "eco-tires") excellent in energy-saving performance, ie, low fuel consumption, has been actively...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F257/02C08K3/04C08L9/00C08L51/00
CPCC08F257/02C08K3/04C08L9/00C08F290/044C08K3/013Y02T10/86C08F236/06C08F212/08C08F236/04C08L15/00C08L25/10C08L9/06C08L19/003C08J3/24
Inventor 仓富格川辺正直
Owner NIPPON STEEL CHEMICALL &MATERIAL CO LTD
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