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Curable compositions

A technology of composition and compound, applied in the direction of adhesive type, adhesive, epoxy glue, etc.

Active Publication Date: 2012-10-10
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

[0012] However, benzoxazines, adducts of epoxy resins, hydroxyl (e.g. phenolic) terminated polyurethane compounds and phenolic compounds, combinations of epoxy resins and optionally tougheners are believed to have not been marketed or reported so far. , to obtain curable compositions whose reaction products exhibit improved physical properties such as toughness and compressibility after impact

Method used

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  • Curable compositions
  • Curable compositions
  • Curable compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0129] Synthesis of adduct

[0130] First adduct

[0131] The first adduct is formed as follows: • Assemble a reactor with absolutely dry nitrogen supply, heating and cooling capabilities, stirring capabilities and temperature control capabilities. · Add 50.00 parts of DER 332 epoxy resin to the reactor. · Add 42.86 parts of TERATHANE 2000 polyether glycol to the reactor. · Heat the contents of the reactor to a temperature of 225°F under a reduced pressure greater than 28 inches of Hg vacuum and mix for a period of 60 minutes. · Turn off the vacuum source of the reactor and infiltrate dry nitrogen into the top of the reactor. · Cool the contents of the reactor to a temperature of 170°F. · While mixing, carefully add 0.0005 parts of 95% dibutyl tin dilaurate catalyst. -Add 6.57 parts of MONDUR M (4,4'-methylene diisocyanate). • Adjust the mixing and temperature set points of the reactor to maintain a temperature of 180°F and maintain a positive dry nitrogen flow. • Using GPC,...

Embodiment 2

[0135] Composition formula

[0136] The composition was formulated from the components and the amounts in Table 1 below. Table 1 Table 2

[0137] Add the components as follows:

[0138] Warming the benzoxazine at a temperature in the range of 180-200°F makes it flowable and does not initiate curing.

[0139] Mix the first adduct and second adduct with benzoxazine.

[0140] At a temperature of 180°F, the combination of epoxy resin and benzoxazine first and second adducts are mixed until a homogeneous mixture is formed.

[0141] In the presence of a toughening agent, the toughening agent is mixed into the mixture at a temperature in the range of 160-180°F.

[0142] The composition thus formed was vacuum mixed at a temperature in the range of 160-180°F for a period of 15-30 minutes. The composition thus formed is stored in a closed container at room temperature.

[0143] Using the curing curve described below, the sample was cured in an open mold placed in an autoclave.

[0144] The sample...

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Abstract

The present invention relates to curable compositions of benzoxazines, a combination of adducts one of which is prepared from hydroxy-containing compounds, isocyanate-containing compounds and phenolic compounds and the second of which is prepared from the first adduct and epoxy-containing compounds and phenolic compounds, epoxy resins and optionally tougheners.

Description

Technical field [0001] The present invention relates to (a) benzoxazines, (b) one of them is prepared from hydroxyl-containing compounds, isocyanate-containing compounds and phenolic compounds, and the second is prepared from first adducts and epoxy-containing compounds A combination of adducts, (c) an epoxy resin and (d) a curable composition of an optional toughening agent. Background technique [0002] Mixtures of epoxy resins and phenol-terminated polyurethanes are known. Polyurethane is usually obtained by reacting isocyanates with hydroxyl-containing compounds; the remaining polyurethane products no longer contain free phenolic hydroxyl groups. This polyurethane product can be combined with an epoxy resin and an amine curing agent to give a curable coating agent reported to be characterized by improved elasticity. For example, see U.S. Patent Nos. 4,423,201 and 3,442,974. [0003] It is also possible to mix epoxy resin and butadiene and acrylonitrile-based copolymers to im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L101/00C08G8/10
CPCC08L79/04C08K5/357C08J2377/04C08L77/04C08J2379/04C08L75/04C08G18/10C08L63/00C08G18/329C08J5/24C09J163/00C08G59/621C08G18/4045C08L2666/28C08J5/243C08J5/249C08L2666/02C08L2666/22
Inventor W·H·李S·L·莱曼R·S·黄
Owner 汉高知识产权及控股有限公司