US4472341A — Polyurethane process using polysiloxane mold rele…

Claim 1

Independent Claim 152 words

In a process for the production of an organic polyisocyanate based polymer in a closed mold which process comprises polymerizing a reaction mixture comprising at least one organic polyisocyanate with at least one organic polyol in the presence of an internal release agent the improvement which comprises employing as the internal release agent a polysiloxane as a premix with the polyisocyanate said polysiloxane having at least one unit of the formula ##STR16## wherein R is selected from the group consisting of lower-alkyl and aryl, R 1 is a divalent hydrocarbon radical which may contain oxygen or sulfur atoms and R 2 is selected from the group consisting of lower-alkoxy, aryloxy, and radicals having the formula ##STR17## wherein R 3 is selected from the group consisting of hydrogen and lower-arkyl, R 4 is selected from the group consisting of hydrogen and methyl, x has an average value from about 1 to about 50.

Claim 2

Dependent Claim 152 words

In a process for the production of an organic polyisocyanate based polymer in a closed mold which process comprises polymerizing a reaction mixture comprising at least one organic polyisocyanate with at least one organic polyol in the presence of an internal release agent the improvement which comprises employing as the internal release agent a polysiloxane as a premix with the polyisocyanate said polysiloxane having at least one unit of the formula ##STR16## wherein R is selected from the group consisting of lower-alkyl and aryl, R 1 is a divalent hydrocarbon radical which may contain oxygen or sulfur atoms and R 2 is selected from the group consisting of lower-alkoxy, aryloxy, and radicals having the formula ##STR17## wherein R 3 is selected from the group consisting of hydrogen and lower-arkyl, R 4 is selected from the group consisting of hydrogen and methyl, x has an average value from about 1 to about 50.

Claim 3

Dependent Claim 13 words

A process according to claim 1 wherein R in formula (I) is lower-alkyl.

Claim 4

Dependent Claim 10 words

A process according to claim 2 wherein R is methyl.

Claim 5

Dependent Claim 51 words

A process according to claim 1 wherein R 1 in formula (I) is --C n H 2n SC n 'H 2n '-- wherein --C n H 2n -- and --C n 'H 2n '-- each represent alkylene and together have a total of 2 to 12 carbon atoms in the chain.

Claim 6

Dependent Claim 14 words

A process according to claim 1 wherein R 2 in formula (I) is lower-alkoxy.

Claim 7

Dependent Claim 52 words

A process according to claim 1 wherein R 2 in formula (I) is ##STR18## wherein R 3 is selected from the group consisting of hydrogen and lower-alkyl, R 4 is selected from the group consisting of hydrogen and methyl, and x has an average value of from about 1 to about 50.

Claim 8

Dependent Claim 24 words

A process according to claim 6 wherein R 3 is hydrogen and x has an average value of from about 1 to about 15.

Claim 9

Dependent Claim 24 words

A process according to claim 6 wherein R 3 is lower-alkyl and x has an average value of from about 1 to about 15.

Claim 10

Dependent Claim 140 words

In a process for the production of an organic polyisocyanate based polymer in a closed mold which process comprises polymerizing a reaction mixture comprising at least one organic polyisocyanate with at least one organic polyol in the presence of an internal release agent the improvement which comprises employing as the internal release agent a polysiloxane having at least one unit of the formula ##STR19## wherein R is selected from the group consisting of lower-alkyl and aryl, R 1 is a divalent hydrocarbon radical which may contain oxygen or sulfur atoms and wherein R 5 and R 6 are independently selected from the group consisting of hydrogen, lower-alkyl, and the radical having the formula ##STR20## wherein R 4 is selected from the group consisting of hydrogen and methyl and y has an average value of from about 1 to about 4.

Claim 11

Dependent Claim 140 words

In a process for the production of an organic polyisocyanate based polymer in a closed mold which process comprises polymerizing a reaction mixture comprising at least one organic polyisocyanate with at least one organic polyol in the presence of an internal release agent the improvement which comprises employing as the internal release agent a polysiloxane having at least one unit of the formula ##STR19## wherein R is selected from the group consisting of lower-alkyl and aryl, R 1 is a divalent hydrocarbon radical which may contain oxygen or sulfur atoms and wherein R 5 and R 6 are independently selected from the group consisting of hydrogen, lower-alkyl, and the radical having the formula ##STR20## wherein R 4 is selected from the group consisting of hydrogen and methyl and y has an average value of from about 1 to about 4.

Claim 12

Dependent Claim 32 words

A process according to claim 9 wherein R 5 and R 6 are both radicals having the formula ##STR21## wherein y has an average value of from about 1 to about 4.

Claim 13

Dependent Claim 181 words

In a process for the production of a polyurethane elastomer molding by the reaction injection molding of a reactant mixture comprising an organic polyisocyanate, at least one organic polyol and a difunctional extender in the presence of an internal release agent the improvement which comprises employing as the internal release agent a polysiloxane as a premix with the polyisocyanate said polysiloxane having the formula ##STR22## wherein R is selected from the group consisting of lower-alkyl and aryl, R 1 is a divalent hydrocarbon radical which may contain oxygen or sulfur atoms and R 2 is selected from the group consisting of lower-alkoxy, aryloxy, and radicals having the formula ##STR23## wherein R 3 is selected from the group consisting of hydrogen and lower-alkyl, R 4 is selected from the group consisting of hydrogen and methyl, x has an average value from about 1 to about 15, m has an average value of from about 30 to about 150 and q has a value such that the unit which it characterizes represents about 1 to about 10 mole percent of the total polysiloxane.

Claim 14

Dependent Claim 181 words

In a process for the production of a polyurethane elastomer molding by the reaction injection molding of a reactant mixture comprising an organic polyisocyanate, at least one organic polyol and a difunctional extender in the presence of an internal release agent the improvement which comprises employing as the internal release agent a polysiloxane as a premix with the polyisocyanate said polysiloxane having the formula ##STR22## wherein R is selected from the group consisting of lower-alkyl and aryl, R 1 is a divalent hydrocarbon radical which may contain oxygen or sulfur atoms and R 2 is selected from the group consisting of lower-alkoxy, aryloxy, and radicals having the formula ##STR23## wherein R 3 is selected from the group consisting of hydrogen and lower-alkyl, R 4 is selected from the group consisting of hydrogen and methyl, x has an average value from about 1 to about 15, m has an average value of from about 30 to about 150 and q has a value such that the unit which it characterizes represents about 1 to about 10 mole percent of the total polysiloxane.

Claim 15

Dependent Claim 52 words

A process according to claim 11 wherein R is methyl and R 1 is --C n H 2n SC n 'H 2n '-- wherein --C n H 2n -- and --C n 'H 2n '-- each represent alkylene and together have a total of 2 to 12 carbon atoms in the chain.

Claim 16

Dependent Claim 19 words

A process according to claim 12 wherein R 1 has the formula --CH 2 CH 2 SCH 2 --.

Claim 17

Dependent Claim 11 words

A process according to claim 13 wherein R 2 is lower-alkoxy.

Claim 18

Dependent Claim 32 words

A process according to claim 13 wherein R 2 is ##STR24## wherein R 3 is lower-alkyl, R 4 is hydrogen, and x has an average value from about 1 to about 15.

Claim 19

Dependent Claim 177 words

A polysiloxane having the formula ##STR25## wherein R is selected from the group consisting of lower-alkyl and aryl, --C n H 2n -- and --C n 'H 2n '-- each represent alkylene and together have a total of 2 to 12 carbon atoms in the chain, R 2 is selected from the group consisting of lower-alkoxy, aryloxy, and radicals having the formulae ##STR26## wherein R 3 is selected from the group consisting of hydrogen and lower-alkyl, R 4 is selected from the group consisting of hydrogen and methyl, x has an average value of from about 1 to about 50, R 5 and R 6 are independently selected from the group consisting of hydrogen, lower-alkyl, and the radical having the formula ##STR27## wherein R 4 is defined above, and y has an average value of from about 1 to about 4, m has an average value of from about 30 to about 150 and q has a value such that the unit which it characterizes represents about 1 to about 10 mole percent of the total polysiloxane.

Claim 20

Dependent Claim 177 words

A polysiloxane having the formula ##STR25## wherein R is selected from the group consisting of lower-alkyl and aryl, --C n H 2n -- and --C n 'H 2n '-- each represent alkylene and together have a total of 2 to 12 carbon atoms in the chain, R 2 is selected from the group consisting of lower-alkoxy, aryloxy, and radicals having the formulae ##STR26## wherein R 3 is selected from the group consisting of hydrogen and lower-alkyl, R 4 is selected from the group consisting of hydrogen and methyl, x has an average value of from about 1 to about 50, R 5 and R 6 are independently selected from the group consisting of hydrogen, lower-alkyl, and the radical having the formula ##STR27## wherein R 4 is defined above, and y has an average value of from about 1 to about 4, m has an average value of from about 30 to about 150 and q has a value such that the unit which it characterizes represents about 1 to about 10 mole percent of the total polysiloxane.

Claim 21

Dependent Claim 37 words

A polysiloxane according to claim 16 wherein R is methyl, m=about 95, q=about 3, and said --C n H 2n SC n 'H 2n 'COR 2 radical is --CH 2 CH 2 SCH 2 COR 2 .

Claim 22

Dependent Claim 11 words

A polysiloxane according to claim 17 wherein R 2 is methoxy.

Claim 23

Dependent Claim 11 words

A polysiloxane according to claim 17 wherein R 2 is ##STR28##

Claim 24

Dependent Claim 20 words

A polysiloxane according to claim 17 wherein R 2 is ##STR29## wherein x has an average value of about 7.2.

Claim 25

Dependent Claim 17 words

A polysiloxane according to claim 17 wherein R 2 is --N(CH 2 CH 2 OH) 2 .

Claim 26

Dependent Claim 167 words

In a process for the production of a polyurethane elastomer molding by the reaction injection molding of a reactant mixture comprising an organic polyisocyanate, at least one organic polyol and a difunctional extender in the presence of an internal release agent the improvement which comprises employing as the internal release agent a polysiloxane having the formula ##STR30## wherein R is selected from the group consisting of lower-alkyl and aryl, R 1 is a divalent hydrocarbon radical which may contain oxygen or sulfur atoms, R 5 and R 6 are independently selected from the group consisting of hydrogen, lower-alkyl, and the radical having the formula ##STR31## wherein R 4 is selected from the group consisting of hydrogen and methyl and y has an average value of from about 1 to about 4, m has an average value of from about 30 to about 150 and q has a value such that the unit which it characterizes represents about 1 to about 10 mole percent of the total polysiloxane.

Claim 27

Dependent Claim 167 words

In a process for the production of a polyurethane elastomer molding by the reaction injection molding of a reactant mixture comprising an organic polyisocyanate, at least one organic polyol and a difunctional extender in the presence of an internal release agent the improvement which comprises employing as the internal release agent a polysiloxane having the formula ##STR30## wherein R is selected from the group consisting of lower-alkyl and aryl, R 1 is a divalent hydrocarbon radical which may contain oxygen or sulfur atoms, R 5 and R 6 are independently selected from the group consisting of hydrogen, lower-alkyl, and the radical having the formula ##STR31## wherein R 4 is selected from the group consisting of hydrogen and methyl and y has an average value of from about 1 to about 4, m has an average value of from about 30 to about 150 and q has a value such that the unit which it characterizes represents about 1 to about 10 mole percent of the total polysiloxane.

Claim 28

Dependent Claim 45 words

A process according to claim 22 wherein R and R 1 are methyl and --CH 2 CH 2 SCH 2 -- respectively and both R 5 and R 6 have the formula ##STR32## wherein y has an average value from about 1 to about 4.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-09-18	1988-03-19	1988-09-18	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-09-18	1992-03-19	1992-09-18	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-09-18	1996-03-19	1996-09-18	$7700.00	Window Closed / Lapsed

Polyurethane process using polysiloxane mold release agents

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