Back to results
US 2024/0101823 A1Published application
Process for preparing a sulfur copolymer
AssigneeBASF SE
InventorsFlorian Ludwig Geyer, Peter Rudolf
Life of this patent
Estimating the term…
Abstract
A process for preparing a sulfur copolymer, a sulfur copolymer, and a polymer composition containing one or more sulfur copolymers are provided. The process involves copolymerizing a cyclic monothiocarbonate compound of formula wherein R1 and R2 are independently of one another hydrogen, C1-C18-alkyl, C1-C18-alkyl substituted with halogen or interrupted with O or S; C6-C18-aryl or C6-C12-aryl substituted with C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio or halogen; with elemental sulfur in the presence of a polymerization initiator.
Claims18
1:
- A process for preparing a sulfur copolymer, the process comprising:
- copolymerizing a cyclic monothiocarbonate compound of formula
- wherein
- R1 and R2 are independently of one another hydrogen, C1-C18-alkyl, C1-C18-alkyl substituted with halogen or interrupted with O or S;
- C6-C18-aryl or C6-C12-aryl substituted with C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, or halogen;
- with elemental sulfur in the presence of a polymerization initiator.
3 more elements
2:
- The process according to claim 1, wherein
- R1 and R2 are independently of one another and hydrogen, C1-C4-alkyl, C1-C18-alkyl substituted with halogen or interrupted with O or S;
- C6-C12-aryl or C6-C12-aryl substituted with C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio or halogen.
3:
- The process according to claim 1, wherein
- R1 is hydrogen, and
- R2 is hydrogen, C1-C4-alkyl, C1-C8-alkyl substituted with halogen or interrupted with O or S, or phenyl.
4:
- The process according to claim 1, wherein
- R1 is hydrogen, and
- R2 is hydrogen or C1-C4-alkyl,
5:
- The process according to claim 1, wherein the polymerization initiator is an anionic polymerization initiator selected from the group consisting of an amine-containing base, an organic phosphine compound, a metal salt of a mercapto compound, a metal alcoholate, and a basic inorganic salt.
6:
- The process according to claim 5, wherein the anionic polymerization initiator is a basic inorganic salt.
7:
- The process according to claim 1, wherein the copolymerizing is conducted at a temperature in the range of from 40 to 230° C.
8:
- The process according to claim 1, wherein the copolymerizing is conducted without a solvent.
9:
- The process according to claim 1, wherein the process comprises:
- a) providing the anionic polymerization initiator and the elemental sulfur;
- b) heating the resulting mixture of a) to a temperature of from 120 to 230° C.;
- c) adding the cyclic monothiocarbonate compound of formula (I) and optionally further elemental sulfur, while copolymerizing the cyclic rnonothiocarhonate compound of formula (I) and sulfur to form a reaction mixture comprising the copolymer;
- and
- d) optionally, separating the copolymer from the reaction mixture.
3 more elements
10:
- The process according to claim 1, wherein the copolymerizing the cyclic monothiocarbonate compound of formula (I) and the elemental sulfur is conducted at a molar ratio range of from 99:1 to 1:99.
11:
- A sulfur copolymer, obtainable by the process as defined in claim 1.
12:
- The sulfur copolymer according to claim 11, wherein said copolymer comprises n alkylene units of formula
- and
- (n+1) polysulfide units,
- wherein the polysulfide units in total comprise (2n+1) to (2n+9) sulfur atoms,
- n≥1, and
- R1 and R2 are independently of one another hydrogen, C1-C18-alkyl, C1-C18-alkyl substituted with halogen or interrupted with O or S:
- C6-C18-aryl or C6-C12-aryl substituted with C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, or halogen.
4 more elements
13:
- The sulfur copolymer according to claim 12, wherein the polysulfide units in total comprise (2n+1) to (2n+8) sulfur atoms, and
- n≥1.
14:
- A sulfur copolymer, comprising n alkylene units of formula
- and
- (n+1) polysulfide units,
- wherein the polysulfide units in total comprise (2n+1) to (2n+9) sulfur atoms,
- n≥1, and
- R1 and R2 are as defined in claim 1.
3 more elements
15:
- A composition, comprising one or more sulfur copolymers as defined in claim 11.
16:
- The composition according to claim 15, wherein the composition comprises one or more polysulfide compounds) of formula
- wherein x is 2 to 8 and denotes a total of the sulfur atoms present in formulae (IIIa), (IIIb), and (IIIc), and
- R1 and R2 are independently of one another hydrogen, C1-C18-alkyl, C1-C18-alkyl substituted with halogen or interrupted with O or S;
- C6-C18-aryl or C6-C12-aryl substituted with C1-C4-alkyl, C1-C4-alkoxy, C1-C4-alkylthio, or halogen.
1 more element
17:
- The process according to claim 8, wherein the copolymerizing is conducted at a temperature in the range of from 120 to 230° C.
18:
- The sulfur copolymer according to claim 13, wherein the polysulfide units in total comprise (2n+1) to (2n+7) sulfur atoms.