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Polymethyl acryloyl imine foam material with appreciable improved thermodynamic property

A technology of polymethacrylimide and foam materials, applied in chemical instruments and methods, synthetic resin layered products, lamination auxiliary operations, etc., can solve the problem of low heat deformation resistance, achieve good compression performance, Improved thermodynamic performance, high heat deformation resistance effect

Inactive Publication Date: 2008-05-07
ROHM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of metal additives, metal salts of acrylic acid or methacrylic acid and small amounts of crosslinkers is described, the heat distortion resistance of less than 210 °C achieved according to this invention is clearly too low for the requirements of this application

Method used

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  • Polymethyl acryloyl imine foam material with appreciable improved thermodynamic property

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Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0043] Each weight part (T) of methacrylic acid, methacrylonitrile, formamide, 2-propanol, magnesium oxide (MgO) and allyl methacrylate or triallyl cyanurate Esters were mixed with 0.1 T of tert-butyl perpivalate, 0.1 T of tert-butyl perbenzoate and 0.034 T of tert-butyl per-2-ethylhexanoate.

[0044] The mixture was polymerized in a water bath at 38[deg.] C. for 72 hours between two glass plates with a peripheral seal to form a plate with dimensions 500 x 500 x 23 mm. The panel was then tempered at 115° C. for 3 hours in a circulating air heating cabinet. The resulting polymer sheet was foamed after removal of the glass plate by heating at approximately 230° C. for two hours in a circulating-air heating cabinet and subsequently tempered in the same manner at 115° C. for 3 hours and at 190° C. for 48 Hour.

[0045] Determination of the density of the foam board (kg / m 3 ), compressive strength according to DIN 53 421, heat deformation resistance according to DIN 53 424 (poin...

Embodiment 3

[0050] Polymethacrylimide foams of the inventive composition of Example 3 were prepared and measured after foaming of the polymer sheet with and without the two-step tempering treatment. Obtain the following intensity values.

[0051] foam density

[0052] For untempered specimens, the test is terminated after a given time exceeds 12% compression.

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Abstract

The invention relates to a preparation method of a polymethacrylimide foam material with obviously improved thermodynamic performance. The invention is characterized in that the polymerization product used for the polymethacrylimide foam material is added with 0.05wt percent to 5wt percent of olefinic unsaturated compound capable of free radical polymerization and with at least two double bonds and 1wt percent to 5wt percent magnesia. The invention also relates to the polymethacrylimide foam material with anti-thermal-distortion larger than 250 DEG C, and the usage of polymethacrylimide foam material in preparing interlayer component.

Description

technical field [0001] The present invention relates to polymethacrylimide foams having significantly improved thermodynamic properties. Background technique [0002] Polymethacrylimides with high heat deformation resistance can be obtained by reacting polymethyl(meth)acrylate or its copolymers with primary amines. US Pat. A high heat distortion resistance is achieved in this process either by using arylamines (JP05222119A2) or by using special comonomers (EP561 230 A2, EP577 002 A1). But all these reactions do not give foams, but solid polymers, which must be foamed in a separate second step in order to obtain foams. [0003] Poly(meth)acrylimide foams have been known for a long time (see eg DE-C 27 26 260). Due to their high heat deformation resistance, good compressive strength and low weight, they have a wide range of applications, for example as core materials for layered materials or foam composites (cf. DE-C28 22 885, DE-A33 04 882, US-A4 316 934). [0004] Parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/04C08F120/52B32B27/12B32B38/08
Inventor W·盖尔H·赛贝特S·泽瓦蒂
Owner ROHM CO LTD
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