Process and composition for the manufacture of products from sil

Details Process and composition for the manufacture of products from sil Process and composition for the manufacture of products from sil

1984-04-25

1985-07-09

Marquis, Melvyn I.

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

Synthetic resins

From silicon reactant having at least one...

528 34, 528901, 525474, 2643286, 264236, 264347, 2642096, 26433111, C08G 7704

Patent

active

045283540

ABSTRACT:
A process is disclosed for the manufacture of products from silicone rubber stock which includes forming a mixture of silicone rubber components, such as silicone monomers, oligomers, or polymers, microcapsules containing a cross-linking agent for silicone rubber components and, optionally, one or more additives. The cross-linking agent is maintained in microcapsules isolated from the silicone rubber components until a predetermined temperature and pressure are reached. The mixture is flowed into a mold cavity under heat and pressure prior to any significant cross-linking agent-induced cross-linking during a first portion of the molding cycle. During a second portion of the molding cycle, the cross-linking agent is released to effect substantially all cross-linking agent-induced cross-linking. The cured mixture is removed from the mold cavity to provide a silicone rubber product.

REFERENCES:
patent: 3070559 (1982-12-01), Nitzsche et al.
patent: 4293677 (1981-10-01), Imai
patent: 4329275 (1982-05-01), Hatanaka et al.
patent: 4335035 (1982-06-01), Hatanaka et al.
patent: 4375523 (1983-03-01), Hatanaka et al.

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