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Benzoxazine compositions with core shell rubbers

A composition, benzoxazine technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problem of not meeting the needs of heat-curable compositions

Active Publication Date: 2009-11-11
汉高知识产权及控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Despite these prior art, the market demand for thermally curable compositions based on combinations of benzoxazines and core-shell rubbers prepared from bisphenol A, formaldehyde and alkylamines remains unmet

Method used

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  • Benzoxazine compositions with core shell rubbers
  • Benzoxazine compositions with core shell rubbers
  • Benzoxazine compositions with core shell rubbers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0064] Here a series of samples were prepared from benzoxazine and epoxy resin, core shell rubber, nanoparticulate silica and / or epoxidized p-aminophenol as shown in Tables 1a and 1b below. Sample Nos. 1, 4, and 7 are listed as controls without core-shell rubber, relative to Sample Nos. 2-3, 5-6, and 8, respectively.

Table 1a

Table 1b

1 Benzoxazines also include monofunctional benzoxazines.

*Epoxidized p-aminophenol, commercially available from Huntsman Specialty Chemical.

[0065] Prepare each sample as follows:

[0066] Warming the benzoxazine at 160°F made it flowable without initiating cure.

[0067] The remaining ingredients were added to the speedmixer vessel and heated with mixing at a mixing speed of 2400 rpm for a period of 15 minutes at a temperature of 160°F until a substantially homogeneous composition was observed to form. The composition thus formed was poured directly into the mold before curing.

[0068] Thus, in an autoclave, the samples des...

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Abstract

Curable compositions, such as benzoxazine-based ones together with core shell rubbers, are useful in applications within the aerospace industry, such as for example as heat curable composition for useas a matrix resin or an adhesive, and form the basis of the present invention.

Description

technical field [0001] Curable compositions, such as benzoxazine-based compositions with core-shell rubber, are useful in aerospace industry applications, for example as heat-curable compositions for use as matrix resins or adhesives, and form the basis of the present invention . Background technique [0002] Epoxy resins with various hardeners are widely used in the aerospace and electronics industries as adhesives and as matrix resins for use in prepreg assemblies with various substrates. [0003] It is reported in the literature that benzoxazines themselves generally have a high glass transition temperature, good electrical properties (eg, dielectric constant), and low flammability. [0004] Blends of epoxy resins and benzoxazines are known. See, eg, US Patent Nos. 4,607,091 (Schreiber), 5,021,484 (Schreiber), 5,200,452 (Schreiber), and 5,445,911 (Schreiber). These blends show potential use in the electronics industry, as the epoxy resin reduces the melt viscosity of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/35C08L51/00C08L21/00C09J7/35
CPCC08K5/357C08K3/36C08L63/00C08J2363/00C09J11/06C09J7/35C08L51/04C09J2301/408C08J5/241C08J5/244C08J5/243C08J5/242
Inventor S·L·莱曼W·H·李R·S·翁
Owner 汉高知识产权及控股有限公司
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