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Sealing strip material based on partially hydrogenated polystyrene-b-conjugated diene/divinyl benzene random copolymer and preparation thereof

A technology of hydrogenated polystyrene and random copolymer, applied in the field of sealing materials, can solve problems such as no corresponding literature report

Pending Publication Date: 2020-09-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] So far, there is no corresponding literature report on the use of partially hydrogenated polystyrene-conjugated diene elastomers with high melt elasticity, high stiffness, and wide molecular weight distribution as sealing materials.

Method used

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  • Sealing strip material based on partially hydrogenated polystyrene-b-conjugated diene/divinyl benzene random copolymer and preparation thereof
  • Sealing strip material based on partially hydrogenated polystyrene-b-conjugated diene/divinyl benzene random copolymer and preparation thereof
  • Sealing strip material based on partially hydrogenated polystyrene-b-conjugated diene/divinyl benzene random copolymer and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Add 3500mL of cyclohexane solution with a mass fraction of 10% n-hexane in a 5-liter polymerization kettle under nitrogen protection, then add 0.42mL tetrahydrofurfuryl alcohol ethyl ether, heat up to 55-60°C, and then add 100g of benzene Add ethylene into the polymerization kettle and start stirring, then inject 7mL of 1.05mol / L n-butyllithium into the polymerization kettle with a syringe, and start the polymerization reaction for 20 to 25 minutes; then add 400g of butadiene and 21g of Isoprene and 0.35mL of divinylbenzene are pre-mixed mixed monomers. During the polymerization process, the continuous feeding time of the mixed monomers is controlled for 60 minutes. Spectrum quantitatively records 40.5% vinyl mass content of butadiene segment in the polymer, gel permeation chromatography (GPC) records polymer number average molecular weight Mn=79000, Mw=164000 molecular weight distribution index D=2.07; The number average molecular weight Mn of the block polystyrene is ...

Embodiment 2

[0075] Add 3500mL of cyclohexane solution with a mass fraction of 10% n-hexane in a 5-liter polymerization kettle under the protection of nitrogen, then add 0.5mL of ditetrahydrofurfurylpropane, heat up to 55-60°C by heating, then add 200g of benzene Add ethylene into the polymerization kettle and start stirring, then inject 7.5mL of 1.05mol / L n-butyllithium into the polymerization kettle with a syringe, and start the polymerization reaction for 20 to 25 minutes; then add 300g of butadiene and Mixed monomers pre-mixed with 0.30mL divinylbenzene, during the polymerization process, the continuous feeding time of the mixed monomers is controlled for 70min, the polymerization temperature is 55-75°C, and then stirred and reacted for 25min, quantitatively measured by H-NMR spectrum The vinyl mass content of the butadiene segment in the polymer is 47.8%. The gel permeation chromatography (GPC) measures the polymer number average molecular weight Mn=74000, Mw=196000 molecular weight di...

Embodiment 3

[0078] Add 3500mL of cyclohexane solution with a mass fraction of 10% n-hexane in a 5-liter polymerization kettle under nitrogen protection, and other related process conditions are the same as in Example 1, except that 0.6mL of tetrahydrofurfuryl alcohol hexyl ether added 120g of styrene, 360g of butadiene, 12g of isoprene, 0.37mL of divinylbenzene, 6mL of butyllithium for polymerization initiation, and continuous feeding time of mixed monomers of 68min. After the polymerization reaction is completed, the vinyl mass content of the butadiene segment in the polymer is measured to be 53.7%. The GPC records the number average molecular weight of the polymer Mn=88000, Mw=302000 molecular weight distribution index D=3.43; wherein the block polyphenyl The number average molecular weight of ethylene is Mn=22000.

[0079] After the polymer was moved into the hydrogenation tank, 0.14 g of dicyclopentadiene titanium dichloride and 0.09 g of dimethyl phthalate were added in parts by mass...

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Abstract

The invention discloses a sealing strip material based on a partially hydrogenated polystyrene-b-conjugated diene / divinyl benzene random copolymer and a preparation method thereof. The sealing strip material comprises a partially hydrogenated polystyrene-b-conjugated diene / divinyl benzene random copolymer, sulfur, a reinforcing agent, a filling agent, filling oil, a coupling agent, an accelerant,a post-effect vulcanizing agent and auxiliary materials such as zinc oxide, stearic acid and an anti-aging agent. The sealing strip with good physical and mechanical properties, strong ageing resistance, good heat resistance, low compression deformation, continuous tension resistance and long anti-fatigue time can be obtained through mixing, extrusion and vulcanization, and the sealing strip is particularly suitable for outdoor windows.

Description

technical field [0001] The invention relates to a sealing material and a preparation method thereof, in particular to a partially hydrogenated polystyrene-b-conjugated diene / divinylbenzene random copolymerization with partial double bonds, long-chain branching, and wide molecular weight distribution The invention relates to a sealing strip material obtained as an elastic body, and belongs to the technical field of sealing materials. Background technique [0002] The traditional hydrogenated polystyrene-conjugated diene copolymer is a directional polymerized polymer initiated by styrene and conjugated diene with butyllithium in the presence of a solvent. The molecular structure of the copolymer can be linear or star-shaped. Mainly used in thermoplastic elastomers and other plastic materials. Such as patent ZL97108078.4, USP4980421 (1990), EP0471415 (1991, USP5132372 (1992), USP5206307 (1993), etc. introduced the elastomer prepared after hydrogenation of block type polystyren...

Claims

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Application Information

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IPC IPC(8): C08L53/02C08L91/00C08K13/02C08K3/04C08K3/06C08K3/26C08K3/22C08K5/09
CPCC08L53/025C08K2003/265C08K2003/2296C08L91/00C08K13/02C08K3/04C08K3/06C08K3/26C08K3/22C08K5/09
Inventor 张颖蒋文英张建国朱建军
Owner CHINA PETROLEUM & CHEM CORP
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