Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From reactant having at least one -n=c=x group as well as...
Patent
1997-02-14
1999-02-02
Gorr, Rachel
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From reactant having at least one -n=c=x group as well as...
528 53, 4284231, C08G 1810
Patent
active
058666672
ABSTRACT:
A method of producing a cleaning blade comprising steps of filling the cavity of a mold with a liquid composition containing prepolymer for forming urethane rubber, a curing agent and quaternary ammonium salt represented as the following general formula (1) as a catalyst, curing the composition, and unmolding the cured matter and a composition employed therein. ##STR1## wherein R.sub.1,2,3 means --C.sub.n H.sub.2n+1 wherein n represents 0 or a positive integer, R.sub.4 means --C.sub.n H.sub.2n wherein n represents a positive integer and R.sub.5 means --C.sub.n H.sub.2n+1, wherein n represents 0 or a positive integer, or --CH.sub.2 --CN.
For this reason, it does not take a long time for curing a liquid composition, unlike the prior methods, resulting in improvement in product efficiency. Furthermore, since the pot life of the liquid composition is long, fluidity is good and no defective products may not be caused.
REFERENCES:
patent: 4395530 (1983-07-01), Hammond
patent: 5080976 (1992-01-01), Yanai et al.
Mori Hiroyuki
Suzuki Satoshi
Gorr Rachel
Tokai Rubber Industries Ltd.
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