US5120765A
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US
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Block copolymer dispersions and process to prepare block copolymer dispersions
Assignee: Kraton Polymers US LLC
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Filing: 1990-09-28
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Granted: 1992-06-09
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Expires: 2010-09-28
Abstract
Abstract A process to produce a stable suspension of block copolymer particles in a water medium, and a stable suspension of block copolymer particles in a water medium is provided. The block copolymer is a polar functional group--containing vinyl aromatic/conjugated diolefin block copolymer which may optionally be hydrogenated. The use of C 15 to C 24 linear alkyl aromatic sulfonates has been found to be critical in preparation of these stable dispersions.
Inventors
- 👤 Jeffrey G. Southwick
- 👤 Kirk H. Raney
- 👤 John K. Borchardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:55
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J3/05; C08J2353/00; C08J2353/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
148 words
A process to produce a stable block copolymer dispersion in water, the process comprising the steps of: a) providing particles having an average particle size larger than 2 microns of a functionalized block copolymer comprising at least one block which comprises predominately conjugated diolefin monomer units, at least one block which comprises predominately vinyl aromatic monomer units and at least, on the average, one polar functional group per polymer molecule having; b) combining the functionalized block copolymer with a C 15 to C 24 linear alkyl aromatic sulfonate, a thickener and water to form a rubber containing aqueous medium; and c) breaking the block copolymer particles into particles of an average particle size of 2 microns or less by shearing or cavitation of the aqueous medium at a temperature above the glass transition temperature of the vinyl aromatic domains, forming a stable dispersion of block copolymer in water.
Claim 2
Dependent Claim
148 words
A process to produce a stable block copolymer dispersion in water, the process comprising the steps of: a) providing particles having an average particle size larger than 2 microns of a functionalized block copolymer comprising at least one block which comprises predominately conjugated diolefin monomer units, at least one block which comprises predominately vinyl aromatic monomer units and at least, on the average, one polar functional group per polymer molecule having; b) combining the functionalized block copolymer with a C 15 to C 24 linear alkyl aromatic sulfonate, a thickener and water to form a rubber containing aqueous medium; and c) breaking the block copolymer particles into particles of an average particle size of 2 microns or less by shearing or cavitation of the aqueous medium at a temperature above the glass transition temperature of the vinyl aromatic domains, forming a stable dispersion of block copolymer in water.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein the block copolymer particles are broken into 2 microns or smaller particles by shearing and cavitation.
Claim 4
Dependent Claim
21 words
The process of claim 2 wherein the shearing and cavitation is followed by rapidly cooling the block copolymer containing aqueous medium.
Claim 5
Dependent Claim
40 words
The process of claim 1 wherein the amount of functionalized block copolymer is 100 parts by weight and the amount of C 15 to C 24 linear alkyl aromatic sulfonate is from about 2 to about 40 parts by weight.
Claim 6
Dependent Claim
40 words
The process of claim 4 wherein the amount of functionalized block copolymer is 100 parts by weight and the amount of C 15 to C 24 linear alkyl aromatic sulfonate is from about 5 to about 12 parts by weight.
Claim 7
Dependent Claim
22 words
The process of claim 4 wherein the water is in an amount of from about 50 to about 900 parts by weight.
Claim 8
Dependent Claim
22 words
The process of claim 5 wherein the water is in an amount of from about 120 to about 300 parts by weight.
Claim 9
Dependent Claim
20 words
The process of claim 4 wherein the amount of thickener is from about 0.1 to about 20 parts by weight.
Claim 10
Dependent Claim
26 words
The process of claim 1 wherein the functionalized block copolymer comprises, on the average, from about 10 to about 40 polar functional groups per polymer molecule.
Claim 11
Dependent Claim
26 words
The process of claim 1 wherein the functionalized block copolymer comprises, on the average, from about 15 to about 25 polar functional groups per polymer molecule.
Claim 12
Dependent Claim
35 words
The process of claim 1 wherein the polar functional group is selected from the group consisting of carboxylic acid, carboxylic anhydrides, carboxylic salt, ester, alcohol, sulfonic acid, sulfonic salt, amine, epoxide, ketone and combinations thereof.
Claim 13
Dependent Claim
25 words
The process of claim 1 wherein the polar functional group is selected from the group consisting of carboxylic acid, carboxylic anhydride, epoxide, and mixtures thereof.
Claim 14
Dependent Claim
27 words
The process of claim 1 wherein the C 15 to C 24 linear alkyl aromatic sulfonate is a C 15 to C 24 linear alkyl toluene sulfonate.
Claim 15
Dependent Claim
22 words
The process of claim 13 wherein the linear alkyl toluene sulfonate is a C 16 to C 20 linear alkyl toluene sulfonate.
Claim 16
Dependent Claim
24 words
The process of claim 14 wherein the C 16 to C 20 linear alkyl toluene sulfonate is a C 18 linear alkyl toluene sulfonate.
Claim 17
Dependent Claim
11 words
The process of claim 1 wherein the vinyl aromatic is styrene.
Claim 18
Dependent Claim
21 words
The process of claim 16 wherein the conjugated diolefin is selected from the group consisting of butadiene, isoprene and mixtures thereof.
Claim 19
Dependent Claim
24 words
The process of claim 16 wherein the functionalized block copolymer is a linear triblock copolymer with polystyrene end blocks and a conjugated diolefin midblock.
Claim 20
Dependent Claim
28 words
The process of claim 1 wherein the functionalized block copolymer is a hydrogenated block copolymer, with 90 percent or more of the initial ethylenic unsaturation having been hydrogenated.
Claim 21
Dependent Claim
37 words
The process of claim 19 wherein the water is in an amount of from about 50 to about 900 parts by weight, and the functionalized block copolymer is present in an amount of 100 parts by weight.
Claim 22
Dependent Claim
20 words
The process of claim 20 wherein the amount of thickener is from about 0.1 to about 20 parts by weight.
Claim 23
Dependent Claim
26 words
The process of claim 21 wherein the polar functional group is selected from the group consisting of carboxylic acid, carboxylic anhydride, epoxide and a mixture thereof.
Claim 24
Dependent Claim
24 words
The process of claim 21 wherein the C 15 to C 24 linear alkyl aromatic sulfonate is a C 18 linear alkyl toluene sulfonate.
Claim 25
Dependent Claim
25 words
The process of claim 23 wherein the polar functional group is selected from the group consisting of carboxylic acid, carboxylic anhydride, epoxide, and mixtures thereof.
Claim 26
Dependent Claim
24 words
The process of claim 24 wherein the C 15 to C 24 linear alkyl aromatic sulfonate is a C 18 linear alkyl toluene sulfonate.
Claim 27
Dependent Claim
11 words
The process of claim 25 wherein the vinyl aromatic is styrene.
Claim 28
Dependent Claim
25 words
The process of claim 26 wherein the block copolymer is of a linear triblock structure with two polystyrene endblocks, and a hydrogenated conjugated diolefin midblock.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-09 | 1995-12-09 | 1996-06-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-09 | 1999-12-09 | 2000-06-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-09 | 2003-12-09 | 2004-06-09 | $7700.00 | Window Closed / Lapsed |