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A kind of transparent hydrogenated polystyrene-b-randomly copolymerized conjugated diene/styrene resin and preparation method thereof

A technology for hydrogenating polystyrene and styrene resin, applied in the field of modified styrene-butadiene resin materials, can solve the problems of aging resistance, short service life, easy yellowing and cracking, etc., and achieve low turbidity and fracture of products. High elongation and clear surface effect

Active Publication Date: 2017-11-03
SINOPEC BALING PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the disadvantages of aging resistance, easy yellowing and cracking, and short service life in the prior art as outdoor equipment, panels and packaging equipment after injection molding of styrene-butadiene transparent resin; the purpose of the present invention is to provide a Good chemical stability, UV resistance, heat resistance, weather resistance, ozone resistance, and has high elasticity, high impact resistance, high elongation at break, high strength transparent hydrogenated polystyrene-b-random copolymer conjugated di ethylene / styrene resin, the resin is suitable for the preparation of outdoor equipment, packaging materials, plates and instrument panels, etc., and can also be used for the preparation of medical equipment such as infusion tubes, infusion bags, needle tubes

Method used

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  • A kind of transparent hydrogenated polystyrene-b-randomly copolymerized conjugated diene/styrene resin and preparation method thereof
  • A kind of transparent hydrogenated polystyrene-b-randomly copolymerized conjugated diene/styrene resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Add 3500mL of cyclohexane solution with a mass fraction of 10% n-hexane in a 5-liter steel polymerization kettle under nitrogen protection, then add 1.36mL tetrahydrofurfuryl alcohol ethyl ether, and heat up to 50-60°C with hot water Finally, add 80g of styrene into the polymerization kettle and start stirring, then inject 12mL of 0.5mol / L n-butyllithium into the polymerization kettle with a syringe, and react for 20-25min; then add 292.5g of butadiene and 77.5g of benzene The mixed monomer of ethylene and 0.03mL of divinylbenzene was reacted at 50-75°C for 25 minutes; the mass content of vinyl in the butadiene segment in the polymer was measured to be 50.6%, and the number average molecular weight of the polymer Mn=82000.

[0049] Then, after the polymer is pressed into the hydrogenation tank, 0.13 g of dicyclopentadiene titanium dichloride with a mass fraction of 99% is added, the hydrogen pressure is controlled at 1.2 MPa, and the hydrogenation The glue was moved int...

Embodiment 2

[0051] Add 3500mL of cyclohexane solution with a mass fraction of 10% n-hexane in a 5-liter steel polymerization kettle under nitrogen protection, then add 1.54mL tetrahydrofurfuryl alcohol ethyl ether, and heat up to 50-60°C with hot water Finally, add 100g of styrene into the polymerization kettle and start stirring, then inject 11mL of 0.5mol / L n-butyllithium into the polymerization kettle with a syringe, and react for 20-25min; then add 247.5g of butadiene and 102.5g of benzene The mixed monomer of ethylene and 0.04mL of divinylbenzene reacted at 50-75°C for 25 minutes; the vinyl mass content of the butadiene segment in the polymer was measured to be 57.6%, and the number-average molecular weight of the polymer Mn=96000.

[0052] Then, after the polymer is pressed into the hydrogenation tank, 0.14 g of dicyclopentadiene titanium dichloride with a mass fraction of 99% is added, the hydrogen pressure is controlled at 1.3 MPa, and the hydrogenation The glue was moved into the...

Embodiment 3

[0054] Add 3500mL of cyclohexane solution with a mass fraction of 10% n-hexane in a 5-liter steel polymerization kettle under nitrogen protection, then add 1.60mL of ditetrahydrofurfurfurylpropane, and heat up to 50-60°C with hot water Finally, add 140g of styrene into the polymerization kettle and start stirring, then inject 10mL of 0.5mol / L n-butyllithium into the polymerization kettle with a syringe, and react for 20-25min; then add 202.5g of butadiene and 107.5g of benzene The mixed monomer of ethylene and 0.06mL of divinylbenzene reacted at 50-75°C for 25 minutes; the vinyl mass content of the butadiene segment in the polymer was measured to be 62.5%, and the number-average molecular weight of the polymer Mn=104000.

[0055] Then, after the polymer was pressed into the hydrogenation tank, 0.14 g of dicyclopentadiene titanium dichloride with a mass fraction of 99% was added, the hydrogen pressure was controlled at 1.5 MPa, and the hydrogenation The glue was moved into the ...

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Abstract

The invention discloses transparent hydrogenated polystyrene-b-random copolymerized conjugated diene / styrene resin and a preparation method therefor. The transparent resin is composed of a styrene block and a random copolymerized block of styrene, conjugated diene and divinyl benzene, and the double bond degree of hydrogenation in the conjugated diene unit in the block copolymer reaches over 98%. The preparation method comprises: firstly homopolymerizing a styrene monomer under initiation of lithium alkyl; then carrying out random copolymerization with mixed monomers of styrene, conjugated diene and divinyl benzene; and carrying out hydrogenation reaction on the copolymerized product to obtain the resin. The preparation method is simple, and the prepared hydrogenated polystyrene-b-random copolymerized conjugated diene / styrene resin is high in strength, has the characteristics of being relatively good in processing property and aging resistance, low in turbidity, high in transparency and the like, can be molded by injection and film-drawing, and is wide in application field.

Description

technical field [0001] The invention relates to a transparent hydrogenated polystyrene-b-random copolymerized conjugated diene / styrene resin and a preparation method thereof, belonging to the field of modified styrene-butadiene resin materials. Background technique [0002] Styrene and butadiene can be directional polymerized into random copolymers or block copolymers under the initiation of alkyllithium in a solvent, such as the block ratio S / B in SBS=(20-40) / (80-60 ), usually a triblock copolymer; S / B=(20-40) / (80-60) in the SBR molecule, usually a random copolymer; SEBS is a hydrogenated product of SBS; SEPS is a hydrogenated product of SIS. These materials are suitable for making elastic materials such as shoe materials, adhesives, tool handles, tires, medical materials, etc. Commercially available KR-03 and KR-01 are styrene-butadiene transparent resins, wherein S / B=(70-80) / (30-20), the molecular structure is the molecular structure of linear and coupled chains, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F297/04C08F8/04
Inventor 张志斌张颖
Owner SINOPEC BALING PETROCHEMICAL CO LTD
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