Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Patent
1998-02-20
1999-12-14
Yoon, Tae
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
524709, 524860, 528 21, 528 23, C08G 7708, C08K 55399
Patent
active
06001928&
ABSTRACT:
A process for which making silicone-filler mixtures which comprises effecting the ring-opening polymerisation of a cyclosiloxane with a phosphazene base in the presence of a filler and of water, preferably from 0.5 mil to 10 mols of water per mol of phosphazene base. The filler is preferably selected from silica, alumina, titanium dioxide, carbon black and calcium carbonate, present in an amount of from 1 to 200 parts by weight per 100 parts by weight of cyclosiloxane. An agent or conditions which inhibit catalyst activity may initially be present (e.g. carbon dioxide or excess water), and polymerisation may be initiated by reducing the effect of the inhibiting agent or conditions (e.g. by heating). Silicon-elastomers produced by curing such silicone polymer-filler mixtures are also claimed.
REFERENCES:
patent: 4431771 (1984-02-01), Falender et al.
patent: 4448927 (1984-05-01), Falender et al.
patent: 4482670 (1984-11-01), Saam et al.
patent: 5138008 (1992-08-01), Montague et al.
patent: 5210129 (1993-05-01), Habimana et al.
patent: 5334688 (1994-08-01), Loo
Poly Prep ACS, Div. Polym. Chem, 1996, vol. 37, pp. 668-669.
Macromol. Rapid Commun. 16, pp. 449-453 (1995).
Angew. Chem. Int. Ed. Engle, 1993, 32, No. 9, pp. 1361-1363.
Schwesinger et al., Liebigs Ann. 1996, 1055-1081.
Molenberg and Moller, Maromol Rapid Commun. 16, 449-453 (1995).
Van Dyke and Clarson in Poly Prep ACS Div. Ploym Chem 1996, 37,668.
Harkness Brian
Taylor Richard
Boley William F.
Dow Corning Limited
Warren Jennifer S.
Yoon Tae
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