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US4145490A Expired / Lapsed US ⏱️ 0.0 years remaining

Carboxylated copolymers of isobutylene and a vinylbenzene

Assignee: EIDP Inc
•
Filing: 1977-04-01
•
Granted: 1979-03-20
•
Expires: 1997-04-01
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Abstract

Abstract Graft copolymers of the formula X.sub.m Y.sub.n Y'.sub.p (Z.sub.q).sub.r wherein X is an isobutylene monomer unit, Y is a non-carboxylated vinylbenzene monomer unit of the formula ##STR1## IN WHICH Q is hydrogen or lower alkyl, R is halogen, lower alkyl, chloro lower alkyl, lower akoxy, or two adjacent R's together are methylenedioxy, and S is an integer from 0 to 5, Y' is a carboxylated Y unit, Z is a pivalolactone monomer unit, M represents the number of isobutylene monomer units in the copolymer, N represents the number of non-carboxylated vinylbenzene monomer units in the copolymer, P represents the number of carboxylated vinylbenzene monomer units in the copolymer and is about 5 to 100% of n+ p, M and (n+ p) are in an m:(n+ p) ratio of about 2:1 to 1000:1, Q represents the number of pivalolactone monomer units per polypivalolactone side chain graft and is in the range of about 2 to 500, R represents the number of polypivalolactone side chain grafts in the graft copolymer and is substantially equal to p, X, y and Y' are randomly interconnected through carbon to carbon linkages with single Y and Y' units predominantly connected only to X units, Z q is a single polypivalolactone side chain grafted to a Y' unit through the carboxyl group, and (Z q ) r is about 3 to 80% of the total weight of the graft copolymer, And the copolymer has an X m Y n Y' p equivalent weight per carboxyl group of about 200 to 1× 10 5 .

Inventors

  • 👤 John F. Harris, Jr.
  • 👤 William H. Sharkey

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 08:32
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/06; C08G63/08; C08F; C08F210/00; C08F210/04; C08F210/08; C08F210/10; C08F8/00

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 169 words
A carboxylated copolymer of the formula X.sub.m Y.sub.n Y'.sub.p wherein X is an isobutylene monomer unit, Y is a non-carboxylated vinylbenzene monomer unit of the formula ##STR6## in which Q is hydrogen or lower alkyl, R is halogen, lower alkyl, chloro lower alkyl, lower alkoxy, or two adjacent R's together are methylenedioxy, and s is an integer from 0 to 5, Y' is a carboxylated Y unit, m represents the number of isobutylene monomer units in the copolymer, n represents the number of non-carboxylated vinylbenzene monomer units in the copolymer, p represents the number of carboxylated vinylbenzene monomer units in the copolymer and is 5 to 100% of (n + p), m and (n + p) are in an m:(n + p) ratio of 2:1 to 1000:1, X, y and Y' are randomly interconnected through carbon to carbon linkages with single Y and Y' units predominately connected only to X units, and the copolymer has an equivalent weight per carboxyl group of 200 to 1 × 10 5 .
Claim 2
Dependent Claim 169 words
A carboxylated copolymer of the formula X.sub.m Y.sub.n Y'.sub.p wherein X is an isobutylene monomer unit, Y is a non-carboxylated vinylbenzene monomer unit of the formula ##STR6## in which Q is hydrogen or lower alkyl, R is halogen, lower alkyl, chloro lower alkyl, lower alkoxy, or two adjacent R's together are methylenedioxy, and s is an integer from 0 to 5, Y' is a carboxylated Y unit, m represents the number of isobutylene monomer units in the copolymer, n represents the number of non-carboxylated vinylbenzene monomer units in the copolymer, p represents the number of carboxylated vinylbenzene monomer units in the copolymer and is 5 to 100% of (n + p), m and (n + p) are in an m:(n + p) ratio of 2:1 to 1000:1, X, y and Y' are randomly interconnected through carbon to carbon linkages with single Y and Y' units predominately connected only to X units, and the copolymer has an equivalent weight per carboxyl group of 200 to 1 × 10 5 .
Claim 3
Dependent Claim 35 words
The carboxylated copolymer of claim 1 in which the non-carboxylated isobutylene/vinylbenzene copolymer from which the copolymer is obtained by carboxylation has a molecular weight in the range of 1000 to 5 × 10 6 .
Claim 4
Dependent Claim 21 words
The carboxylated copolymer of claim 2 in which the vinylbenzene is selected from the group consisting of vinyltoluene, styrene and α-methylstyrene.
Claim 5
Dependent Claim 56 words
The carboxylated copolymer of claim 3 in which the non-carboxylated substrate copolymer has a molecular weight in the range of 2000 to 2 × 10 6 , m:(n + p) is in a ratio of 5:1 to 600:1, and the copolymer has an equivalent weight per carboxyl group of 600 to 6 × 10 4 .
Claim 6
Dependent Claim 56 words
The carboxylated copolymer of claim 3 in which the non-carboxylated substrate copolymer has a molecular weight in the range of 5000 to 1 × 10 6 , m:(n + p) is in a ratio of 8:1 to 440:1, and the copolymer has an equivalent weight per carboxyl group of 1000 to 5 × 10 4 .
Claim 7
Dependent Claim 12 words
The carboxylated copolymer of claim 5 in which the vinylbenzene is vinyltoluene.
Claim 8
Dependent Claim 12 words
The carboxylated copolymer of claim 5 in which the vinylbenzene is styrene.
Claim 9
Dependent Claim 12 words
The carboxylated copolymer of claim 5 in which the vinylbenzene is α-methylstyrene.

References Cited (Backward Citations)

US3168456A Cited
US3346631A Cited
US3897513A Cited
US4031168A Cited
US4067929A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-03-19 1982-09-18 1983-03-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-03-19 1986-09-18 1987-03-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-03-19 1990-09-18 1991-03-20 $7700.00 Window Closed / Lapsed

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