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US 4,357,388 AGranted
Hot roll fuser
AssigneeInternational Business Machines Corporation
InventorJames C. Minor
Life of this patent
Estimating the term…
Abstract
A xerographic hot roll fuser whose hot roll's soft, elastomeric outer surface is formed of a mixture of 70 parts polymethylvinylsiloxane where the vinyl groups are terminating groups, and 30 parts of a blended polymer consisting of the polymethylvinylsiloxane and polymethyl-H-siloxane in which the hydride function is greater than two.
Claims5
A fixing roll comprising a rigid core and an outer resilient elastomeric sleeve which is a mixture of about 70 parts by weight part A and about 30 parts by weight part B;
- wherein part A is a polymethylvinylsiloxane polymer where the vinyl groups are terminating groups, and of a molecular weight average of about 17,700 and a polydispersity of about 2.85, and includes about 47.7% by weight of a finely divided mineral silica, and a small amount of an organic complex of platinum;
- and
- part B is a two-part polymer of said polymethylvinylsiloxane of a molecular weight average of about 14,200 and a polydispersity of about 4.21, and polymethyl-H-siloxane in which the hydride function is greater than two, and of a molecular weight average of about 3,480 and a polydispersity of about 1.56, and includes about 45% by weight of said finely divided mineral silica,
- the after-curing crosslink density of said sleeve being from 15 to 23.times.10.sup.-5 mole crosslinks per gram.
1 more element
Dependencies are inferred from the claim text.