US4036867A — Organo-aluminum-silicon reducing agents and proce…

Claim 1

Independent Claim 150 words

A process for the production of an organo-aluminum-silicon reducing agent consisting essentially of reacting a hydrogenpolysiloxane having a viscosity of from 5 to 100 cST at 25° C. and at least two siloxane units having the formula ##STR8## wherein R is a member selected from the group consisting of alkyl having from 1 to 6 carbon atoms, cycloalkyl having from 5 to 6 carbon atoms and phenyl, said hydrogenpolysiloxane having the three valences of its silicon atoms on the ends of the polysiloxane chain satisfied by R, hydrogen or, at most, one hydroxyl group per end silicon atom, with a dialkyl aluminum hydride having from 2 to 8 carbon atoms in each of the alkyls, at a temperature not exceeding 80° C. and in a molar ratio of from 0.8 to 2 mols of said siloxane units per mol of said dialkyl aluminum hydride, and recovering said organo-aluminum reducing agent.

Claim 2

Dependent Claim 150 words

A process for the production of an organo-aluminum-silicon reducing agent consisting essentially of reacting a hydrogenpolysiloxane having a viscosity of from 5 to 100 cST at 25° C. and at least two siloxane units having the formula ##STR8## wherein R is a member selected from the group consisting of alkyl having from 1 to 6 carbon atoms, cycloalkyl having from 5 to 6 carbon atoms and phenyl, said hydrogenpolysiloxane having the three valences of its silicon atoms on the ends of the polysiloxane chain satisfied by R, hydrogen or, at most, one hydroxyl group per end silicon atom, with a dialkyl aluminum hydride having from 2 to 8 carbon atoms in each of the alkyls, at a temperature not exceeding 80° C. and in a molar ratio of from 0.8 to 2 mols of said siloxane units per mol of said dialkyl aluminum hydride, and recovering said organo-aluminum reducing agent.

Claim 3

Dependent Claim 20 words

The process of claim 1, wherein the reaction is carried out at a temperature of from 50° to 65° C.

Claim 4

Dependent Claim 12 words

The process of claim 1, wherein the reaction is carried out continuously.

Claim 5

Dependent Claim 27 words

The process of claim 1, wherein the molar ratio of the reactants is from 1 to 1.2 mols of siloxane units per mol of dialkyl aluminum hydride.

Claim 6

Dependent Claim 32 words

The process of claim 1, wherein said hydrogenpolysiloxane is a member selected from the group consisting of methylhydrogenpolysiloxane, an ethylhydrogenpolysiloxane, and a phenylhydrogenpolysiloxane, each end-blocked with trimethylsilyl groups, and methylhydrogencyclotrisiloxane, and methylhydrogencyclotetrasiloxane.

Claim 7

Dependent Claim 42 words

The process of claim 1, wherein said hydrogenpolysiloxane is methylhydrogenpolysiloxane mainly end-blocked with trimethylsilyl groups, having a hydroxy-group content of, at the most, from 0.05 to 0.2% by weight, and having a viscosity of from 25 to 35 cSt at 25° C.

Claim 8

Dependent Claim 20 words

The process of claim 1 wherein said dialkyl aluminum hydride has from 2 to 4 carbon atoms in the alkyls.

Claim 9

Dependent Claim 29 words

The process of claim 1, wherein said dialkyl aluminum hydride is a member selected from the group consisting of diethyl aluminum hydride, di-n-butyl aluminum hydride, and di-isobutyl aluminum hydride.

Claim 10

Dependent Claim 37 words

The process of claim 4, wherein a methylhydrogenpolysiloxane having a viscosity of from 25 to 35 cSt at 25° C. is reacted with a dialky aluminum hydride, having from 2 to 4 carbon atoms in the alkyls.

Claim 11

Dependent Claim 140 words

An organo-aluminum-silicon reducing agent reaction product prepared by the reaction, at a temperature of below 80° C, of a dialkyl aluminum hydride having from 2 to 8 carbon atoms in each of the alkyls, with a hydrogenpolysiloxane having a viscosity of from 5 to 100 cST at 25° C and at least two siloxane units having the formula ##STR9## wherein R is a member selected from the group consisting of alkyl having from 1 to 6 carbon atoms, cycloalkyl having from 5 to 6 carbon atoms and phenyl, said hydrogenpolysiloxane having the three valences of its silicon atoms on the ends of the polysiloxane chain satisifed by R, hydrogen or, at most, one hydroxyl group per end silicon atom, in a molar ratio of from 0.8 to 2 mols of said siloxane units per mol of said dialkyl aluminum hydride.

Claim 12

Dependent Claim 140 words

An organo-aluminum-silicon reducing agent reaction product prepared by the reaction, at a temperature of below 80° C, of a dialkyl aluminum hydride having from 2 to 8 carbon atoms in each of the alkyls, with a hydrogenpolysiloxane having a viscosity of from 5 to 100 cST at 25° C and at least two siloxane units having the formula ##STR9## wherein R is a member selected from the group consisting of alkyl having from 1 to 6 carbon atoms, cycloalkyl having from 5 to 6 carbon atoms and phenyl, said hydrogenpolysiloxane having the three valences of its silicon atoms on the ends of the polysiloxane chain satisifed by R, hydrogen or, at most, one hydroxyl group per end silicon atom, in a molar ratio of from 0.8 to 2 mols of said siloxane units per mol of said dialkyl aluminum hydride.

Claim 13

Dependent Claim 31 words

The organo-aluminum-silicon reducing agent reaction product of claim 10 wherein the molar ratio of the reactants is from 1 to 1.2 mols of siloxane units per mol of dialkyl aluminum hydride.

Claim 14

Dependent Claim 36 words

The organo-aluminum-silicon reducing agent reaction product of claim 10 wherein said hydrogenpolysiloxane is a member selected from the group consisting of methylhydrogenpolysiloxane, an ethylhydrogenpolysiloxane, and a phenylhydrogenpolysiloxane, each end-blocked with trimethylsilyl groups, and methylhydrogencyclotrisiloxane, and methylhydrogencyclotetrasiloxane.

Claim 15

Dependent Claim 46 words

The organo-aluminum-silicon reducing agent reaction product of claim 10 wherein said hydrogenpolysiloxane is methylhydrogenpolysiloxane mainly end-blocked with trimethylsilyl groups, having a hydroxy-group content of, at the most, from 0.05 to 0.2% by weight, and having a viscosity of from 25 to 35 cSt at 25° C.

Claim 16

Dependent Claim 24 words

The organo-aluminum-silicon reducing agent reaction product of claim 10 wherein said dialkyl aluminum hydride has from 2 to 4 carbon atoms in the alkyls.

Claim 17

Dependent Claim 33 words

The organo-aluminum-silicon reducing agent reaction product of claim 10 wherein said dialkyl aluminum hydride is a member selected from the group consisting of diethyl aluminum hydride, di-n-butyl aluminum hydride, and di-isobutyl aluminum hydride.

Claim 18

Dependent Claim 41 words

The organo-aluminum-silicon reducing agent reaction product of claim 11 wherein a methylhydrogenpolysiloxane having a viscosity of from 25 to 35 cSt at 25° C. is reacted with a dialkyl aluminum hydride, having from 2 to 4 carbon atoms in the alkyls.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1980-07-18	1981-01-17	1981-07-19	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1984-07-18	1985-01-17	1985-07-19	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1988-07-18	1989-01-17	1989-07-19	$7700.00	Window Closed / Lapsed

Organo-aluminum-silicon reducing agents and process

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