Terephthalic polyester composition and its use as soil release agent
US6579837B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2001 |
| Grant date | Jun 17, 2003 |
| Priority date | — |
| Expiry date | Jan 9, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/83
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention concerns a terephthalic polyester composition (CPT), comprising in mixture: an ethyleneterephthalate homooligomer (PET 1) essentially containing recurrent terephthalate oxyethylene (TE) units; and a block terephthalate copolymer (PET 2/TE-POE) containing at least a polyethyleneterephthalate (PET 2) sequence; and at least a terephthalate polyoxyethylene (TE-POE) sequence whereof the POE unit has a molecular mass of 1500 to 4000 in number; said composition (CPT) being characterised in that: the quantity of (TE) units of (PET 1) represents not more than 10% of the total number of (TE) units present in said composition (CPT); the weight quantity of (TE) units present in the composition (CPT) represents at least 10% of (TE) units present in the composition (CPT); the quantity by weight of mono(oxyethyleneoxy) radicals (OEO) represents at least 1.3% of the weight of the composition (CPT), said radicals (OEO) belonging to the aromatic diester oxyethylene groups (ODA) of formula: —A—C(O)—O—CH2—CH2—O—C(O)—A— present in all the (PET 1) and (PET 2) sequences; and the molar mass by weight of block terephthalic copolymer (PET 2…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.