Polyurethane composition having improved tear strength and proce

Details Polyurethane composition having improved tear strength and proce Polyurethane composition having improved tear strength and proce

1975-10-23

1977-12-13

Person, Sandra M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 40TN, C08K 336

Patent

active

040628256

ABSTRACT:
A polyurethane composition having high tear strength has been produced by mixing homogeneously 20 to 50 parts by weight of finely divided acidic silica particles, 100 parts by weight of isocyanate-terminated prepolymer and appropriate parts of curative, and curing the mixture in a manner well known in the prior art, where the ratio (l/d) of average chain distance (l) between adjacent crosslinking points of the cured polyurethane chains to average size (d) of finely divided silica particles is in the range of from 2.5 to 20.

REFERENCES:
patent: 3391101 (1968-07-01), Kelly et al.
patent: 3441523 (1969-04-01), Dwyer et al.
patent: 3585162 (1971-06-01), Lapp
patent: 3716502 (1973-02-01), Loew

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