US4920168A — Stabilized siloxane-containing melt-extrudable th…

Claim 1

Independent Claim 409 words

A stabilized surface-segregatable, melt-extrudable thermoplastic composition which comprises: (A) at least one thermoplastic polymer; (B) at least one siloxane-containing primary additive having at least two moieties, A and B, in which: (1) said primary additive is compatible with said polymer at melt extrusion temperatures but is incompatible at temperatures below melt extrusion temperatures, but each of moiety A and moiety B, if present as separate compounds, would be incompatible with said polymer at melt extrusion temperatures and at temperatures below melt extrusion temperatures; (2) moiety B has at least one functional group which is a poly(oxyalkylene) moiety; and (3) the molecular weight of said primary additive is in the range of from about 400 to about 15,000; with the proviso that said primary additive cannot be a compound having the general formula, ##STR24## in which each R independently is an alkyl group; R 1 is a monovalent inorganic group containing at least one ethyleneoxy group, vicinal epoxy group, or amino group; and a and b, which can be the same or different, each have a value of at least 1; and (C) at least one siloxane-containing stabilizing additive having at least two moieties, A' and B', in which: (1) said stabilizing additive is compatible with said polymer at melt extrusion temperatures but is incompatible at temperatures below melt extrusion temperatures, but each of moiety A' and moiety B', if present as separate molecular compounds, would be incompatible with said polymer at melt extrusion temperatures and at temperatures below melt extrusion temperatures; (2) moiety B' has at least one functional group which is an aliphatic or cycloaliphatic amino group; and (3) the molecular weight of said stabiilizing additive is in the range of from about 400 to about 15,000; with the proviso that said stabilizing additive cannot be a compound having the general formula, ##STR25## in which each R independently is an alkyl group; R 1 is a monovalent organic group containing at least one amino group; and a and b, which can be the same or different, each have a value of at least 1; in which thermoplastic composition: (1) said primary additive is present at a level in the range of from about 0.1 to about 50 percent by weight, based on the weight of said polymer; and (2) said stabilizing additive is present at a level in the range of from about 0.1 to about 5 percent by weight, based on the weight of said primary additive.

Claim 2

Dependent Claim 409 words

A stabilized surface-segregatable, melt-extrudable thermoplastic composition which comprises: (A) at least one thermoplastic polymer; (B) at least one siloxane-containing primary additive having at least two moieties, A and B, in which: (1) said primary additive is compatible with said polymer at melt extrusion temperatures but is incompatible at temperatures below melt extrusion temperatures, but each of moiety A and moiety B, if present as separate compounds, would be incompatible with said polymer at melt extrusion temperatures and at temperatures below melt extrusion temperatures; (2) moiety B has at least one functional group which is a poly(oxyalkylene) moiety; and (3) the molecular weight of said primary additive is in the range of from about 400 to about 15,000; with the proviso that said primary additive cannot be a compound having the general formula, ##STR24## in which each R independently is an alkyl group; R 1 is a monovalent inorganic group containing at least one ethyleneoxy group, vicinal epoxy group, or amino group; and a and b, which can be the same or different, each have a value of at least 1; and (C) at least one siloxane-containing stabilizing additive having at least two moieties, A' and B', in which: (1) said stabilizing additive is compatible with said polymer at melt extrusion temperatures but is incompatible at temperatures below melt extrusion temperatures, but each of moiety A' and moiety B', if present as separate molecular compounds, would be incompatible with said polymer at melt extrusion temperatures and at temperatures below melt extrusion temperatures; (2) moiety B' has at least one functional group which is an aliphatic or cycloaliphatic amino group; and (3) the molecular weight of said stabiilizing additive is in the range of from about 400 to about 15,000; with the proviso that said stabilizing additive cannot be a compound having the general formula, ##STR25## in which each R independently is an alkyl group; R 1 is a monovalent organic group containing at least one amino group; and a and b, which can be the same or different, each have a value of at least 1; in which thermoplastic composition: (1) said primary additive is present at a level in the range of from about 0.1 to about 50 percent by weight, based on the weight of said polymer; and (2) said stabilizing additive is present at a level in the range of from about 0.1 to about 5 percent by weight, based on the weight of said primary additive.

Claim 3

Dependent Claim 14 words

The stabilized thermoplastic composition of claim 1, in which said polymer is a polyolefin.

Claim 4

Dependent Claim 15 words

The stabilized thermoplastic composition of claim 2, in which said polyolefin is polyethylene or polypropylene.

Claim 5

Dependent Claim 14 words

The stabilized thermoplastic composition of claim 1, in which said polymer is a polyester.

Claim 6

Dependent Claim 14 words

The stabilized thermoplastic composition of claim 4, in which said polyester is poly(ethylene terephthalate).

Claim 7

Dependent Claim 34 words

The stabilized thermoplastic composition of claim 1, in which said primary additive is present at a level of from about 0.3 to about 17 percent by weight, based on the weight of said polymer.

Claim 8

Dependent Claim 34 words

The stabilized thermoplastic composition of claim 1, in which said primary additive is present at a level of from about 0.5 to about 12 percent by weight, based on the weight of said polymer.

Claim 9

Dependent Claim 34 words

The stabilized thermoplastic composition of claim 1, in which said primary additive is present at a level of from about 0.5 to about 5 percent by weight, based on the weight of said polymer.

Claim 10

Dependent Claim 23 words

The stabilized thermoplastic composition of claim 1, in which said primary additive has a molecular weight of from about 500 to about 1,500.

Claim 11

Dependent Claim 23 words

The stabilized thermoplastic composition of claim 1, in which said primary additive has a molecular weight of from about 500 to about 1,000.

Claim 12

Dependent Claim 31 words

The stabilized thermoplastic composition of claim 1, in which the alkylene portion of said poly(oxyalkylene) moiety of moiety B of said primary additive contains from 2 to about 6 carbon atoms.

Claim 13

Dependent Claim 23 words

The stabilized thermoplastic composition of claim 11, in which the oxyalkylene repeating units are oxy ethylene or oxypropylene units or a mixture thereof.

Claim 14

Dependent Claim 35 words

The stabilized thermoplastic composition of claim 1, in which said stabilizing additive is present at a level of from about 0.5 to about 5 percent by weight, based on the weight of said primary additive.

Claim 15

Dependent Claim 23 words

The stabilized thermoplastic composition of claim 1, in which said stabilizing additive has a molecular weight of from about 500 to about 1,500.

Claim 16

Dependent Claim 23 words

The stabilized thermoplastic composition of claim 1, in which said stabilizing additive has a molecular weight of from about 500 to about 1,000.

Claim 17

Dependent Claim 20 words

The stabilized thermoplastic composition of claim 1, in which said moiety B' of said stabilizing additive is an aliphatic amine.

Claim 18

Dependent Claim 74 words

The stabilized thermoplastic composition of claim 1, in which said moiety A of said primary additive comprises at least one tetrasubstituted disiloxanylene group, optionally associated with one or more groups selected from the group consisting of trisubstituted silyl and trisubstituted siloxy groups, the substituents of all such groups being independently selected from the group consisting of monovalent alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which may be substituted or unsubstituted, and moiety B.

Claim 19

Dependent Claim 74 words

The stabilized thermoplastic composition of claim 1, in which said moiety A' of said stabilizing additive comprises at least one tetrasubstituted disiloxanylene group, optionally associated with one or more groups selected from the group consisting of trisubstituted silyl and trisubstituted siloxy groups, the substituents of all such groups being independently selected from the group consisting of monovalent alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which may be substituted or unsubstituted, and moiety B'.

Claim 20

Dependent Claim 218 words

The stabilized thermoplastic composition of claim 1, in which said primary additive contains a plurality of groups selected from the group represented by the following general formulae: B.sub.1 --, (1) B.sub.2 --O--, (2) R.sub.1 --, (3) R.sub.2 --Si|, (4) (R.sub.3)(R.sub.4)(R.sub.5)Si--, (5) (R.sub.6)(R.sub.7)(R.sub.8)Si--O--, (6) [--Si(R.sub.9)(R.sub.10)--O--].sub.c, (7) [--Si(R.sub.11)(B.sub.3)--O--].sub.d ; (8) in which each of R 1 and R 2 independently is a monovalent group selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which, except for hydrogen, may be substituted or unsubstituted; each of R 3 -R 5 , inclusive, independently is a monovalent group selected from the group consisting of alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which may be substituted or unsubstituted, and B 4 ; each of R 6 -R 11 , inclusive, independently is a monovalent group selected from the group consisting of alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which may be substituted or unsubstituted; the number of recurring units in each of groups (7) and (8) can vary from 1 to about 100, which recurring units need not be attached to like units or posses identical substituents; and each of B 1 -B 4 , inclusive, independently is poly(oxyalkylene) moiety; with the proviso that such plurality of groups results in at least one tetrasubstituted disiloxanylene group.

Claim 21

Dependent Claim 218 words

The stabilized thermoplastic composition of claim 1, in which said stabilizing additive contains a plurality of groups selected from the group represented by the following general formulae: B.sub.1 --, (1) B.sub.2 --O--, (2) R.sub.1 --, (3) R.sub.2 --Si|, (4) (R.sub.3)(R.sub.4)(R.sub.5)Si--, (5) (R.sub.6)(R.sub.7)(R.sub.8)Si--O--, (6) [--Si(R.sub.9)(R.sub.10)--O--].sub.c, (7) [--Si(R.sub.11)(B.sub.3)--O--].sub.d ; (8) in which each of R 1 and R 2 independently is a monovalent group selected from the group consisting of hydrogen, alkyl, cycloakly, aryl, and heterocyclic groups, each of which, except for hydrogen, may be substituted or unsubstituted; each of R 3 -R 5 , inclusive, independently is a monovalent group selected from the group consisting of alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which may be substituted or unsubstituted, and B 4 ; each of R 6 -R 11 , inclusive, independently is a monovalent group selected from the group consisting of alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which may be substituted or unsubstituted; the number of recurring units in each of groups (7) and (8) can vary from 1 to about 100, which recurring units need not be attached to like units or posses identical substituents; and each of B 1 -B 4 , inclusive, independently is poly(oxyalkylene) moiety; with the proviso that such plurality of groups results in at least one tetrasubstituted disiloxanylene group.

Claim 22

Dependent Claim 80 words

The stabilized thermoplastic composition of claim 1, in which said primary additive is a compound having the general formula, ##STR26## in which each of R 12 and R 13 independently is a monovalent group selected from the group consisting of hydrogen, alkyl, cycloakly, aryl, and heterocyclic groups, each of which, except for hydrogen, may be substituted or unsubstituted; each of B 5 and B 6 independently is a poly(oxyalkylene) group; and e represents an integer from 2 to about 100.

Claim 23

Dependent Claim 16 words

The stabilized thermoplastic composition of claim 21, in which said poly(oxyalkylene) moiety is a poly(oxyethylene) moiety.

Claim 24

Dependent Claim 21 words

The stabilized thermoplastic composition of claim 21, in which the oxyalkylene repeating units are a mixture of oxyethylene and oxypropylene units.

Claim 25

Dependent Claim 26 words

The stabilized thermoplastic composition of claim 23, in which the ratio of oxyethylene repeating units to oxypropylene repeating units is from about 10:1 to about 1:10.

Claim 26

Dependent Claim 26 words

The stabilized thermoplastic composition of claim 23, in which the ratio of oxyethylene repeating units to oxypropylene repeating units is from about 5:1 to about 2:1.

Claim 27

Dependent Claim 83 words

The stabilized thermoplastic composition of claim 1, in which said stabilizing additive is a compound having the general formula, ##STR27## in which each of R 12 and R 13 independently is a monovalent group selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which, except for hydrogen, may be substituted or unsubstituted; each of B 5 and B 6 independently is an aliphatic or cycloaliphatic amino group; and e represents an integer from 2 to about 100.

Claim 28

Dependent Claim 75 words

The stabilized thermoplastic composition of claim 1, in which said primary additive is a compound having the general formula, ##STR28## in which each of R 14 -R 20 , inclusive, independently is a monovalent group selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which, except for hydrogen, may be substituted or unsubstituted; B 7 is a poly(oxyalkylene) group; and f represents an integer from 1 to about 100.

Claim 29

Dependent Claim 78 words

The stabilized thermoplastic composition of claim 1, in which said stabilizing additive is a compound having the general formula, ##STR29## in which each of R 14 -R 20 , inclusive, independently is a monovalent group selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which, except for hydrogen, may be substituted or unsubstituted; B 7 is an aliphatic or cycloaliphatic amino group; and f represents an integer from 1 to about 100.

Claim 30

Dependent Claim 75 words

The stabilized thermoplastic composition of claim 1, in which said primary additive is a compound having the general formula, ##STR30## in which each of R 21 -R 23 , inclusive, independently is a monovalent group selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which, except for hydrogen, may be substituted or unsubstituted; B 8 is a poly(oxyalkylene) group; and g represents an integer from 1 to about 100.

Claim 31

Dependent Claim 77 words

The stabilized thermoplastic composition of claim 1, in which said stabilizing additive is a compound having the general formula, ##STR31## in which each of R 21 -R 23 , inclusive, independently is a monovalent group selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, and heterocyclic groups, each of which, except for hydrogen, may be substituted or unsubstituted; B 8 is an aliphatic or cycloaliphatic group; and g represents an integer from 1 to about 100.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1993-04-23	1993-10-23	1994-04-24	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1997-04-23	1997-10-23	1998-04-24	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2001-04-23	2001-10-23	2002-04-24	$7700.00	Window Closed / Lapsed

Stabilized siloxane-containing melt-extrudable thermoplastic compositions

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