Method of purifying block copolymers
AssigneeLANXESS Corporation
InventorGabor Kaszas
Life of this patent
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Abstract
The invention relates to block polymers, for example, arborescent copolymer compounds, and to methods of making and purifying such compounds. In one embodiment, the invention relates to arborescent polymer compounds that contain one or more styrene polymeric blocks in combination with one or more isobutylene polymeric blocks. In another embodiment, the invention relates to methods for purifying arborescent polymer compounds that contain at least one styrene polymeric block in combination with at least one isobutylene polymeric block.
Claims29
A method for purifying an arborescent block co-polymer comprising:
- dissolving the arborescent block co-polymer in one or more first solvents to form a first solution wherein the one or more first solvents dissolve the arborescent block co-polymer;
- combining the first solution with one or more second solvents to produce a precipitated arborescent block co-polymer in a mother liquor wherein at least one of the one or more second solvents is selected from the group consisting of acetone, methyl ethyl ketone, and methyl vinyl ketone;
- and
- separating the precipitated-arborescent block co-polymer from the mother liquor.
A method for purifying an arborescent block co-polymer comprising:
- dissolving the arborescent block co-polymer in one or more first solvents to form a first solution wherein the one or more first solvents dissolve the arborescent block co-polymer;
- combining the first solution with one or more second solvents, to produce a precipitated arborescent block co-polymer in a mother liquor wherein at least one of the one or more second solvents is selected from the group consisting of acetone, methyl ethyl ketone, and methyl vinyl ketone;
- separating the precipitated arborescent block co-polymer from the mother liquor;
- adding to the precipitated arborescent block co-polymer one or more solvents selected from the group consisting of acetone, methyl ethyl ketone, and methyl vinyl ketone to form a first mixture of precipitated arborescent block co-polymer and the one or more solvents;
- combining the first mixture with one or more third solvents selected from the group consisting of methanol, ethanol, 1-propanol, 2-propanol, tert-butanol and 1-butanol to form a second mixture of the precipitated arborescent block co-polymer and a mixture of solvents;
- and
- separating the precipitated arborescent block co-polymer from the mixture of solvents to form a purified arborcscent block co-polymer.
An arborescent block co-polymer purified by a method comprising:
- dissolving the arborescent block co-polymer in one or more first solvents to form a first solution wherein the one or more first solvents dissolve the arborescent block co-polymer;
- combining the first solution with one or more second solvents to produce a precipitated arborescent block co-polymer in a mother liquor wherein at least one of the one or more second solvents is selected from the group consisting of acetone, methyl ethyl ketone, and methyl vinyl ketone;
- separating the precipitated arborescent block co-polymer from the mother liquor;
- adding to the precipitated arborescent block co-polymer one or more solvents selected from the group consisting of acetone, methyl ethyl ketone, and methyl vinyl ketone to form a first mixture of precipitated arborescent block co-polymer and the one or more solvents;
- combining the first mixture with one or more third solvents selected from the group consisting of methanol, ethanol, 1-propanol, 2-propanol, tert-butanol and 1-butanol to form a second mixture of the precipitated arborescent block co-polymer and a mixture of solvents;
- and
- separating the precipitated arborescent block co-polymer from the mixture of solvents to form a purified arborescent block co-polymer.
Dependencies are inferred from the claim text.