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US 2022/0204656 A1Published application
Depolymerizer and recycled rubber
AssigneeIndustrial Technology Research Institute
InventorsYi-Ting WEI, Jyh-Horng WU, Yao-Zu WU, Ming-Tsong LEU
Life of this patent
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Abstract
A depolymerizer is formed by grafting thiol groups on parts of the double bonds of a polymer of linear conjugated diene monomer. The linear conjugated diene monomer can be 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-pentadiene, 2,3-dimethyl-1,3-pentadiene, 2-phenyl-1,3-butadiene, or 4,5-diethyl-1,3-octadiene. The depolymerizer has a weight average molecular weight of 1000 to 400000.
Claims7
A depolymerizer, being:
- formed by grafting thiol groups on parts of double bonds of a polymer of a linear conjugated diene monomer, wherein the linear conjugated diene monomer is 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-pentadiene, 2,3-dimethyl-1,3-pentadiene, 2-phenyl-1,3-butadiene, or 4, 5-diethyl-1,3-octadiene.
A recycled rubber, being formed by
- depolymerizing 100 parts by weight of rubber using 0.5 to 10 parts by weight of a depolymerizer,
- wherein the depolymerizer is formed by grafting thiol groups on parts of double bonds of a polymer of a linear conjugated diene monomer,
- wherein the linear conjugated diene monomer is 1,3-butadiene, isoprene, 1,3-pentadiene, 2,3-dimethyl-1,3-butadiene, 2-methyl-1,3-pentadiene, 2,3-dimethyl-1,3-pentadiene, 2-phenyl-1,3-butadiene, or 4,5-diethyl-1,3-octadiene.
Dependencies are inferred from the claim text.