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Graft copolymer and method for preparing the same

A technology of graft copolymers and block copolymers, which is applied in the field of grafted polyolefin polymers, can solve problems such as poisoning, reduced reactivity hydrogenation reactions, and reduced hydrogenation efficiency

Active Publication Date: 2008-09-03
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, if a specific metal catalyst is added for hydrogenation with high selectivity towards unsaturated organic compounds, poisoning of the catalyst will be observed due to reduced activity of the catalyst, resulting in reduced hydrogenation efficiency
In particular, if the unsaturated polymer contains functional groups or coupling agents that are sensitive to poisoning, the reactivity is reduced or even the hydrogenation reaction itself will not be able to take place

Method used

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  • Graft copolymer and method for preparing the same
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  • Graft copolymer and method for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Embodiment 1: prepare chlorinated polyolefin / polystyrene graft copolymer (CPO-g-PS)

[0063] (1) Preparation of polystyrene active activator

[0064] 380 g of purified cyclohexane and 35 g of styrene were added to a 10 L nitrogen-substituted reactor, and 9.7 g of n-butyllithium was added thereto until the temperature of the mixture reached 65° C. to initiate polystyrene polymerization. The polymerization was not terminated until the styrene was completely consumed.

[0065] The obtained linear polystyrene lithium (polystyrene lithium) living polymer had a molecular weight of 1,000 g / mol and a content of styrene blocks of 100% by weight.

[0066] (2) Preparation of graft copolymer

[0067] 245 g of cyclohexane and 2 g of chlorinated polyolefin with a chlorine content of 36% by weight were added to a 500 mL nitrogen-substituted reactor, followed by reflux of cyclohexane to remove residual moisture.

[0068] 30 g of polystyrene lithium active polymer was added to the ab...

Embodiment 2

[0070] Embodiment 2: Preparation of chlorinated polyolefin / polystyrene graft copolymer (CPO-g-PS)

[0071] The experiment was carried out in the same manner as described in Example 1, except that 12 g of polar solvent tetrahydrofuran and 233 g of cyclohexane were used for the graft copolymerization of polyolefin / polystyrene in step (2).

Embodiment 3

[0072] Embodiment 3: prepare chlorinated polyolefin / polystyrene graft copolymer (CPO-g-PS)

[0073] In addition to adding 3.5g reaction accelerator tetramethylethylenediamine (TMEDA) to initiate the graft copolymerization reaction of chlorinated polyolefin / polystyrene block in step (2) for improving reactivity, with Experiments were carried out in the same manner as described in Example 1.

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Abstract

The present invention relates to a graft copolymer and a method for preparing the same, and more precisely a graft copolymer prepared by the steps of preparing a living activator with a single monomer and a block copolymer of a vinyl aromatic hydrocarbon or a conjugated diene hydrocarbon; and then grafting the prepared living activator to polyolefin polymer, and a method for preparing the same. According to the method of the present invention, the individual vinyl aromatic hydrocarbon or conjugated diene hydrocarbon polymers, and a block copolymer thereof, can be grafted onto chlorinated polyolefin polymer as a branch by using a living activator, and the resultant graft copolymer can be widely applied to various high molecular additives, compatabilizers, waterproof sheets and asphalt, etc.

Description

technical field [0001] The present invention relates to a kind of graft copolymer and the preparation method of this graft copolymer, more specifically, relate to a kind of single monomer and block copolymer adopting vinyl aromatic hydrocarbon or conjugated diene to prepare active activator, And then the step of grafting the prepared active activator onto the polyolefin polymer, the prepared graft copolymer, and the present invention relates to the preparation method of the graft copolymer. Background technique [0002] Conventional thermoplastic elastomer (hereinafter referred to as "TPE") is a material developed in the 1960s that has elastic properties of vulcanized rubber and processability of thermoplastic resins, and has since been used in various fields. [0003] In particular, styrene TPE has a phase-separated structure between polystyrene blocks (hard segments) and elastomer blocks (elastomer segments) at room temperature, and can be modified into di-block or multi-b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F259/02C08F297/00
CPCC08F297/04C08F259/02C08F297/02C08L51/06C08L2666/02C08F255/00C08F257/00
Inventor 全汶锡李镇宇李春和崔益准
Owner LG CHEM LTD
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