Latent hardener, process for producing the same, and...

Details Latent hardener, process for producing the same, and... Latent hardener, process for producing the same, and...

2010-02-09

2011-10-25

Jagannathan, Vasu (Department: 1764)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C523S400000, C427S458000, C428S407000, C156S060000

Reexamination Certificate

active

08044117

ABSTRACT:
A latent curing agent (30) of the present invention includes a core member (31) and a capsule (37) covering up the surface of the core member (31). The core member (31) includes a secondary particle (32) and a curing agent (35) retained in a gap (38) of the secondary particle (32). The curing agent (35) is liquid at ambient temperature. When the capsule (37) is destructed so that the curing agent (35) is emitted into an adhesive, the curing agent (35) is mixed with other ingredients in the adhesive. A metal alcoholate which is liquid at ambient temperature or a metal chelate which is liquid at ambient temperature is used as the curing agent (35), while a silane coupling agent is added to the adhesive. A reaction takes place between the curing agent (35) and the silane coupling agent to yield cations. By these cations, the epoxy resin undergoes cation in polymerization. Since the cation generating reaction proceeds at a temperature lower than in the case of the conventional adhesive, curing proceeds more promptly and at a lower temperature than in the case of the conventional adhesive.

REFERENCES:
patent: 3111569 (1963-11-01), Rubenstein
patent: 5302456 (1994-04-01), Matsui
patent: 6042894 (2000-03-01), Goto et al.
patent: 6224947 (2001-05-01), Hall et al.
patent: 6794038 (2004-09-01), Matsushima
Machine Translation of JP 2002-368047.
Machine Translation of JP 05-086340.
“Titanium chelate.” [online] Material Data Safety Sheet, Microliink, Hubur group, 2008 [Retrieved Jun. 8, 2011] Retrieved on the Internet <URL:http://www.microlink.com/images/pdf20%of20api-002/MSDS%20Adhesion%20Promoter20API%20.pdf>.

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