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Encapsulated michael addition catalyst

A catalyst, Michael acceptor technology, applied in the field of encapsulating Michael addition catalysts

Inactive Publication Date: 2010-04-07
ROHM & HAAS CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is also possible to obtain previously unknown one-component Michael addition compositions using encapsulated catalysts

Method used

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  • Encapsulated michael addition catalyst
  • Encapsulated michael addition catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 10

[0059] Morecure TM 2000

[0060] Morecure TM 2000

Embodiment 11

[0062] The lamination adhesive formulation of Example 10 (66.42 grams) was mixed with 7 grams of Isolene TM 40 Coated Na 2 CO 3 mixed to obtain 2.7% Na in the final formulated adhesive 2 CO 3 . Viscosity data for the adhesive was measured and summarized below:

[0063] Initial viscosity, 25℃

1000 cps

48 hours viscosity, 25℃

1000 cps

8 days viscosity, 25℃

3600cps

[0064] The lamination adhesive formulations were applied to primed 1×3 inch aluminum coupons. The aluminum coupons were mist (misted) with deionized water, laminated to primed 1 X 3 inch aluminum coupons to form a 1 inch overlap, and allowed to cure at room temperature for 24 hours. The lamination adhesive formulation was mixed with a small amount of deionized water and applied to the primed aluminum coupons to create the 1 inch overlap described above.

[0065] The average 24 hour tensile strength data for laminates prepared using the encapsulated catalyst in the lam...

Embodiment 12

[0069] Morecure TM 2000

[0070] Morecure TM 2000

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Abstract

Encapsulated base catalysts in the presence of Michael donors and acceptors result in compositions useful as adhesives, sealants, coatings, elastomers, films, and foams by providing unprecedented control over pot-life and cure rate in a two-part or multi-component system and allowing for use as a one-part composition. Encapsulated catalysts prevent premature reaction of the various reactants during storage and processing and yet, upon the rupture of the capsules by a pre-determined event such as the application of heat, pressure, or solvation, produce rapid cure. Use of encapsulated catalystsgives unprecedented control over pot-life and cure rate over compositions previously contemplated. As such the use of encapsulated catalysts also results in the potential for one-part Michael additioncompositions previously not known. The use of encapsulated catalysts also allows for faster green strength development by providing for a very rapid cure upon rupture of the capsules.

Description

technical field [0001] The present invention relates to compositions useful in the preparation of adhesives, sealants, coatings, foams, elastomers, films, molded articles and inks. The present invention relates to compositions cured by reacting a multifunctional acrylate with a reactive methylene compound via a carbon-Michael addition reaction using an encapsulated base catalyst. Background technique [0002] The Michael addition reaction is a known method by which a Michael acceptor reacts with a Michael donor to extend a carbon chain. For example, RT Morrison and RN Boyd in Organic Chemistry , 3rd ed., Allyn and Bacon, 1973 covers Michael addition. The reaction is believed to take place between the Michael donor and the Michael acceptor in the presence of a base catalyst. [0003] US Patent Application Publication No. 2005 / 0081994 discloses the use of strong base catalysts to cure Michael addition compositions useful in adhesives, sealants, elastomers and foams. It is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/00C08F20/10B01J13/00C09D4/00C09J4/00C08J5/18C08J9/00C08K3/10
CPCC08F222/1006C09J133/068C08K9/10C08L2312/00C09J133/14C08G2261/334C08G61/12C09J165/00C08F222/102B01J13/02B01J31/00
Inventor L·F·布林克曼T·F·考夫曼
Owner ROHM & HAAS CO