Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of linear styrene type thermoplastic elastic bodies

A thermoplastic elastomer and styrene-based technology, applied in the field of preparation of linear styrene-based thermoplastic elastomers, to achieve the effect of improving physical and mechanical properties

Active Publication Date: 2013-10-23
山东聚圣科技有限公司
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no reference to the preparation of linear styrenic thermoplastic elastomers with 4-methylstyrene as the hard segment.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of linear styrene type thermoplastic elastic bodies
  • Preparation method of linear styrene type thermoplastic elastic bodies
  • Preparation method of linear styrene type thermoplastic elastic bodies

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038]Add measured cyclohexane solvent 4000g, different proportions of 4-methylstyrene and styrene (refer to Table 2-5), activator tetrahydrofuran 0.6g, and add initiator at 40-50°C into the polymerization kettle 10.7mmol of n-butyllithium, react for 30 minutes, then add the measured butadiene (refer to Table 1 for the amount), control the maximum temperature to be less than 110°C, and react for 30 minutes, then add 8.9mmol of coupling agent (by 1,2 - dibromoethane as an example), the temperature is maintained between 75 ~ 100 ° C, the reaction is 30 minutes, and the anti-aging agent 2,6-di-tert-butyl-4-methylphenol of 0.5% of the total weight of the monomer is added , stirred evenly, and the physical and mechanical properties of the product were tested after coagulation and drying. The experimental data are listed in

[0039] Table 1-6.

[0040] Table 1

[0041] serial number S / B Styrenic monomer (g) Butadiene (g) A 10 / 90 24 216 B 20 / 80 48 192 ...

Embodiment 2

[0053] Isoprene was used to replace butadiene, and other conditions were the same as in Example 1. The experimental data are listed in Table 7, and the product performance data are listed in Table 8.

[0054] Table 7

[0055] serial number S / I Styrenic monomer (g) Isoprene (g) E 10 / 90 24 216 F 20 / 80 48 192 G 30 / 70 72 168 H 40 / 60 96 144

[0056] Table 8

[0057] serial number *Elongation(%) *Tensile strength (MPa) **Hardness (Shore A) ***MFR(g / 10min) E1 1000 5 32 6.5 E2 1050 5 33 7.5 E3 1100 6 32 7 E4 1100 6 33 8 E5 1150 7 34 7.5 F1 1300 7.5 38 22 F2 1350 7.5 37 23 F3 1400 8 38 23 F4 1400 8.5 38 24 F5 1500 8 39 24 G1 900 15 60 8.5 G2 920 16 61 9 G3 950 16 61 9 G4 960 15 62 9.5 G5 960 16 61 9.5 H1 750 17 80 38 H2 800 17 78 39 H3 800 18 80 39 H4 850 18 84 40 H5 8...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of thermoplastic elastic bodies, in particular to a preparation method of linear styrene type thermoplastic elastic bodies. The method has the technical scheme that styrene type monomers are used as hard sections, conjugated diene type monomers are used as soft sections, the hard sections and the soft sections take polymerization reaction, the linear styrene type thermoplastic elastic bodies are obtained, and the styrene type monomers are 4-vinyltoluene or a mixture of 4-vinyltoluene and styrene. The 4-vinyltoluene is used as the hard section for fully or partially replacing the existing styrene type monomers for preparing the novel linear structure styrene type thermoplastic elastic bodies, the molecular weight of the prepared products is great, the average molecular weight is 50000 to 350000, and in addition, the physical and mechanical performance such as the elongation rate, the tensile strength, the hardness, the melt flowing speed and the like is obviously improved through being compared with that of products prepared by the styrene monomers.

Description

technical field [0001] The invention relates to the field of thermoplastic elastomers, in particular to a preparation method of linear styrene thermoplastic elastomers. Background technique [0002] There are three main types of common styrene-based thermoplastic elastomers: SBS, SIS, and SEBS. The main structures are as follows: [0003] [0004] In the existing production technology of styrenic thermoplastic elastomers, there are many preparation methods of styrenic thermoplastic elastomers. Taking SBS as an example, its production methods mainly include a three-step feeding method using a single lithium initiator, a two-step mixing feeding method, a coupling method, and a two-step feeding method using a dilithium initiator. [0005] 1. Three-step feeding method [0006] Use monolithium organic compounds such as n-butyllithium or sec-butyllithium as initiators, and carry out polymerization reactions in non-polar solvents under the protection of inert gases. The feedin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/04
Inventor 崔志勇佀庆法项秀丽
Owner 山东聚圣科技有限公司