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Process for the production of expandable vinyl aromatic polymer granulate having decreased thermal conductivity

A technology of vinyl aromatic and polymer particles, which is applied in the field of vinyl aromatic polymer foam, which can solve the problems of poor thermal and mechanical properties of foam, and achieve the effect of small free radical activity and reduced inhibition ability

Pending Publication Date: 2017-12-01
SYNTHOS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, foams producible from granules according to US 2008 / 0203597 A1 have poor thermal and mechanical properties

Method used

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  • Process for the production of expandable vinyl aromatic polymer granulate having decreased thermal conductivity
  • Process for the production of expandable vinyl aromatic polymer granulate having decreased thermal conductivity
  • Process for the production of expandable vinyl aromatic polymer granulate having decreased thermal conductivity

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preparation example Construction

[0125] Further details on the preparation of geopolymer composites can be found in the patent application entitled "Geopolymers and Composite and Expandable Vinyl Aromatic Polymer Particles and Expanded Vinyl Aromatic Polymer Composites and Expanded Vinyl Aromatic Polymer Foam" International Patent Application PCT / EP2016 / 050594.

[0126] According to a first preferred embodiment of the present invention, the mineral component (b1) is (b1a) a specific type of silica.

[0127] According to a second preferred embodiment of the present invention, the mineral component (b1) is (b1b) a calcium phosphate of a specific type.

[0128] According to a third preferred embodiment, the mineral component (b1) is (b1c) a mineral having a perovskite structure.

[0129] According to a fourth preferred embodiment, the mineral component (b1) is (b1d) a geopolymer and / or a geopolymer composite.

[0130] According to a fifth preferred embodiment of the present invention, the mineral component (b1...

Embodiment 1

[0203] A general purpose polystyrene (Synthos PS585X) was added together with a flame retardant (Emerald 3000) (in an amount of 2.5% by weight), dicumyl (in an amount of 0.5% by weight), Irganox 1010 (in an amount of 0.125% by weight) , Irgafos 126 (in the amount of 0.125% by weight), and Epon 164 (in the amount of 0.25% by weight) were added to a co-rotating twin-screw main extruder (32D / 40mm). The melt temperature in the main extruder was 180°C.

[0204] A general-purpose polystyrene (Synthos PS585X) was fed into a co-rotating sidearm (54D / 25mm) twin-screw extruder via the main feed hopper, with a 55.0 m 2 R350 type carbon black (obtained from Cabot Company) of the BET specific surface of / g with 5% by weight, spherical amorphous silica (obtained from ELKEM Company, with the amount of 1% by weight), and tricalcium phosphate (Expandia R obtained from Innophos company obtains (in the amount of 3 wt. %), they all are premixed at first so as to form consistent mixture. The melt...

Embodiment 2

[0212] The components according to Example 1 were used, and a styrene-maleic anhydride copolymer containing 15% maleic anhydride was further added to the corotating twin-screw main extruder in an amount of 1% by weight .

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Abstract

The invention relates to an extrusion process for the production of expandable vinyl aromatic polymer granulate comprising mixing first and second additives with first and second polymer components, respectively, in dedicated mixers.

Description

technical field [0001] The present invention relates to an extrusion process for producing expandable vinyl aromatic polymer particles, expandable polymer particles producible thereby, and vinyl aromatic polymer foams producible from such particles. Background technique [0002] Vinyl aromatic polymers are known and used for the production of intumescent products for a variety of applications, one of the most important of which is for thermal insulation. Therefore, there is a growing need for expanded vinyl aromatic polymers that have both low thermal conductivity and good mechanical and self-extinguishing properties. [0003] Thermally insulating fillings selected from the group of heat absorbers such as carbon black, heat scattering agents such as minerals selected from the group of silicon dioxide and titanium oxide, and heat reflectors such as aluminum pigments and graphite are well known. The addition of additives can reduce the thermal conductivity of the polymer. Ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/18C08J9/232C08L25/06B29C44/34
CPCB29C44/3442B29C44/3461C08J9/18C08J9/232C08J2201/022C08J2201/03C08J2325/06B29K2995/0015B29K2995/0063B29K2025/00B29K2105/0026B29C44/3415B29C44/50B29B7/005B29B7/244B29B7/7485B29B7/88B29B7/90B29B9/065B29B9/12B29K2025/06C08J9/0066C08J9/0061C08J2425/08C08J2471/10Y02P40/10C08J3/22C08K3/04C08K3/32C08K2003/325B29K2025/04C08J9/0014
Inventor 菲利普·卢卡斯·康加特威茨彼得·罗杰克马尔泽拿·米科釆克-奥普恰尔斯卡卡米尔·乌特拉塔
Owner SYNTHOS