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US 12,637,532 B2Granted
Sulfonated polymers and compositions thereof
AssigneeKraton Corporation
InventorsJiaqi Yan, Martine Dupont, Brett Neumann
Life of this patent
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Abstract
A composition is disclosed comprising a sulfonated styrenic block copolymer (SSBC) having an ion exchange capacity (IEC) of at least 0.5 meq/g; and at least one compound which reacts with the SSBC forming a cross-linked SSBC. The compound is selected from: (i) a cross-linking agent, (ii) a metal cation, and (iii) a non-sulfonated polymer. A film prepared from the composition containing the cross-linked SSBC has a toughness in wet state measured after 1 week of 1.2 to 8 MJ/m3; and a tensile stress in wet state measured after 1 week of 3.2 to 8 MPa, according to ASTM D412. The film can be used as a water purification membrane or an antimicrobial protection layer.
Claims17
A composition comprising:
- (a) a sulfonated styrenic block copolymer having an ion exchange capacity (IEC) of at least 0.5 meg/g, wherein the sulfonated styrenic block copolymer is obtained by sulfonation of a styrenic block copolymer precursor;
- and
- (b) a sufficient amount of a non-sulfonated polymer which reacts with the sulfonated styrenic block copolymer to form a cross-linked sulfonated block copolymer, wherein the non-sulfonated polymer is an unhydrogenated block copolymer having a block D′, a block B′, optionally a block A′, and mixtures thereof,
- each block D′ is derived from a conjugated diene monomer, having a vinyl content of 40-90 wt. %, based on total weight of the polymerized conjugated diene monomer in the block D′;
- each block A′ is derived from at least one compound selected from polymerized (i) para-substituted styrene, (ii) ethylene, (iii) alpha olefins of 3 to 18 carbon atoms, (iv) 1,3-cyclodiene, (v) conjugated dienes, (vi) acrylic esters, (vii) methacrylic esters, and (viii) mixtures thereof, and
- each block B′ is derived from a vinyl aromatic monomer;
- and
- wherein a film prepared from the composition containing the cross-linked sulfonated styrenic block copolymer has a toughness in wet state measured after 1 week of 1.2 to 8 MJ/m3 and a tensile stress in wet state measured after 1 week of 3.2 to 8 MPa, both measurements according to ASTM D412.
5 more elements
A composition comprising:
- (a) a sulfonated styrenic block copolymer having an ion exchange capacity (IEC) of at least 0.5 meq/g, wherein the sulfonated styrenic block copolymer is obtained by sulfonation of a styrenic block copolymer precursor;
- and
- (b) a sufficient amount of a non-sulfonated polymer which reacts with the sulfonated styrenic block copolymer to form a cross-linked sulfonated styrenic block copolymer, wherein the non-sulfonated polymer has at least one block D′, and optionally a block selected from A′, B′, and mixtures thereof,
- each block D′ is derived from a conjugated diene monomer, having a vinyl content of 40-90 wt. %, based on total weight of the polymerized conjugated diene monomer in the block D′;
- each block A′ is derived from at least one compound selected from polymerized (i) para-substituted styrene, (ii) ethylene, (iii) alpha olefins of 3 to 18 carbon atoms, (iv) 1,3-cyclodiene, (v) conjugated dienes, (vi) acrylic esters, (vii) methacrylic esters, and (viii) mixtures thereof,
- each block B′ is derived from a vinyl aromatic monomer;
- and
- wherein the non-sulfonated polymer has a molecular weight (Mp) of 20 to 400 kg/mol, and a coupling efficiency of 50 to 95%;
- and
- wherein a film prepared from the composition containing the cross-linked sulfonated styrenic block copolymer has a toughness in wet state measured after 1 week of 1.2 to 8 MJ/m3, and a tensile stress in wet state measured after 1 week of 3.2 to 8 MPa, both measurements according to ASTM D412.
7 more elements
A composition comprising:
- (a) a sulfonated styrenic block copolymer having an ion exchange capacity (IEC) of at least 0.5 meg/g, wherein the sulfonated styrenic block copolymer is obtained by sulfonation of a styrenic block copolymer precursor;
- and
- (b) a sufficient amount of a cross-linking agent which reacts with the sulfonated styrenic block copolymer to form a cross-linked sulfonated styrenic block copolymer, wherein the cross-linking agent is selected from a polyisocyanate, a polyester diol, and mixtures thereof;
- wherein a film prepared from the composition containing the cross-linked sulfonated styrenic block copolymer has a toughness in wet state measured after 1 week of 1.2 to 8 MJ/m3 and a tensile stress in wet state measured after 1 week of 3.2 to 8 MPa, both measurements according to ASTM D412.
1 more element
Dependencies are inferred from the claim text.