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Core-shell polymer having hydrophilic shell for improved shell coverage and anti-blocking property

An elastic polymer, polymer technology, used in the field of impact modifiers, can solve problems such as incompleteness and uneven thickness of the polymer shell

Inactive Publication Date: 2006-04-26
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, the resulting polymer shell may be uneven in thickness and / or incomplete

Method used

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  • Core-shell polymer having hydrophilic shell for improved shell coverage and anti-blocking property
  • Core-shell polymer having hydrophilic shell for improved shell coverage and anti-blocking property
  • Core-shell polymer having hydrophilic shell for improved shell coverage and anti-blocking property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Embodiment 1 (comparative example)

[0086] The following procedure was used to synthesize multistage impact modifiers having a hard core, an elastic or soft layer and a hard shell (see image 3 ).

[0087] The ratio of the tertiary polymer is 35 / 45 / 20 and its refractive index is between 1.460-1.500.

[0088] The composition of the tertiary polymer is

[0089] Level 1: 74.8 / 25 / 0.2MMA / EA / ALMA

[0090] Level 2: 83.5 / 15.5 / 1.0BA / Sty / ALMA

[0091] The third level: 95 / 5MMA / EA

[0092] where MMA = methyl methacrylate

[0093] EA = ethyl acrylate

[0094]BA = butyl acrylate

[0095] Sty = styrene

[0096] ALMA = allyl methacrylate

[0097] The monomer material accounting for 14% of the total material in the first stage is emulsified in water, using potassium dodecylbenzenesulfonate as emulsifier, controlling pH with potassium carbonate, and polymerizing it at high temperature with potassium persulfate. The remainder of the first stage is then added to the preformed po...

Embodiment 2

[0099] Prepare this polymkeric substance with the method similar to embodiment 1, difference is that the composition ratio of polymer of various stages is different:

[0100] Tertiary polymer ratio 35 / 45 / 20

[0101] The composition of the tertiary polymer is

[0102] Level 1: 74.8 / 25 / 0.2MMA / EA / ALMA

[0103] Level 2: 83.5 / 15.5 / 1.0BA / Sty / ALMA

[0104] Level 3: (95-X) / 5 / X MMA / EA / HEMA

[0105] where X=5

[0106] HEMA = 2-hydroxyethyl methacrylate

Embodiment 3

[0108] Except X=10, with embodiment 2.

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Abstract

The present invention relates to core-shell polymers comprising a shell of a hydrophilic copolymer and a core material in an amount of up to 75-95% by weight. The hydrophilic shell provides better coverage of the core, resulting in better powder properties such as anti-caking properties. The hydrophilic shell can also be made thinner, and a more elastic core can be used. The core-shell polymers of the invention are particularly suitable as impact modifiers for plastics.

Description

technical field [0001] The present invention relates to core shell polymers comprising a shell of hydrophilic copolymer and a relatively high content of core material. The hydrophilic shell provides better coverage of the core, resulting in better powder properties. The hydrophilic shell can also be made thinner and a more elastic core can be used and still maintain good powder handling properties. Core-shell polymers have excellent processing characteristics, including the ability to accept improved spray drying. The core-shell polymers of the invention are particularly suitable as impact modifiers for plastics. Background technique [0002] Synthetic resins are used as engineering plastics in many applications, such as building materials and automotive parts. Engineering plastics have good physical and chemical resistance and are inexpensive. But some engineering plastics have the disadvantage of poor impact strength. The poor impact strength of these materials can be...

Claims

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Application Information

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IPC IPC(8): C08F20/10C08F2/00C08F2/22C08L27/06C08L27/24C08L69/00C08L77/00
Inventor 洪晟B·艾吉科比R·皮利
Owner ARKEMA FRANCE SA
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