Cleaning compositions for solid surfaces – auxiliary compositions – Cleaning compositions or processes of preparing – For cleaning a specific substrate or removing a specific...
Reexamination Certificate
2001-01-09
2003-06-17
Short, Patricia A. (Department: 1712)
Cleaning compositions for solid surfaces, auxiliary compositions
Cleaning compositions or processes of preparing
For cleaning a specific substrate or removing a specific...
C510S528000, C525S437000, C525S444000, C528S300000, C008S115560
Reexamination Certificate
active
06579837
ABSTRACT:
This application is an application under 35 U.S.C. Section 371 of International Application Number PCT/FR991/01691 filed on Jul. 9, 1999.
A subject matter of the present invention is a novel terephthalic polyester composition, its process of preparation by transesterification/condensation of poly(ethylene terephthalate) and of polyethylene glycol, and its use as soil-release agent in detergent formulations, in rinsing, softening or finishing formulations, for the washing, with or without pretreatment, the rinsing, the softening or the finishing of textiles, in particular polyester-based textiles.
The soil-release activity of ethylene terephthalate/polyethylene oxide terephthalate copolymers in the finishing of textiles, in particular polyester-based textiles, and the use of said copolymers as soil-release and/or antiredeposition agents in detergent formulations for the washing, with or without pretreatment, of textiles, in particular polyester-based textiles, are well known (U.S. Pat. Nos. 396,252; 4,116,885; 4,785,060).
These copolymers can, for example, derive from the transesterification/condensation of poly(ethylene terephthalate) and of polyethylene glycol (U.S. Pat. No. 4,785,060).
The Applicant Company has found a novel terephthalic polyester composition which can be obtained by transesterification/condensation of a poly(ethylene terephthalate) and of a polyethylene glycol and which in particular exhibits particularly good soil-release properties.
According to the invention, it is a terephthalic polyester composition (TPC) comprising, as a mixture
an ethylene terephthalate homooligomer (PET
1
) essentially comprising oxyethylene terephthalate (TE) repeat units of formula (I)
—C(O)—A—C(O)—O—CH
2
—CH
2
—O— (I)
where A represents the 1,4-phenylene group,
and a block terephthalic copolymer (PET
2
/TE-POE) comprising
at least one polyethylene terephthalate block (PET
2
) composed of oxyethylene terephthalate (TE) repeat units of formula (I)
—C(O)—A—C(O)—O—CH
2
—CH
2
—O— (I)
where A represents the 1,4-phenylene group,
and at least one polyoxyethylene terephthalate block (TE-POE) of formula
—C(O)—A—C(O)—O—CH
2
—CH
2
—O—(CH
2
—CH
2
—O)
n
—
the value of n being such that said block exhibits a number-average molecular mass of the order of 1500 to 4000, preferably of the order of 3000 to 4000,
said composition being characterized in that:
the amount of (TE) units of the polyethylene terephthalate (PET
1
) does not represent more than 10%, preferably not more than 7%, of all the (TE) units present in the terephthalic polyester composition (TPC),
the amount by weight of all the (TE) units present in said (TPC) composition represents at least 11%, preferably from 11.5 to 17%, of the weight of said (TPC) composition,
the amount by weight of mono(oxyethyleneoxy) (OEO) residues of formula
1/2
O—CH
2
—CH
2
—O
1/2
represents at least 1.3%, preferably from 1.3 to 2.3%, of the weight of said terephthalic polyester composition (TPC),
said (OEO) residues belonging to the oxyethylene aromatic diester (OAD) groups of formula
—A—C(O)—O—CH
2
—CH
2
—O—C (O)—A—
present in all the (PET
1
) and (PET
2
) blocks,
and in that the weight-average molar mass of said block terephthalic copolymer (PET
2
/TE-POE) is at least 30000, preferably at least 35000, very particularly at least 40000.
The ends of the chains of (PET
1
) homooligomers are generally composed of —C(O)—A—C(O)—O—CH
2
—CH
2
—OH units.
The ends of the chains of block terephthalic copolymer (PET
2
/TE-POE) are generally composed of
—C(O)—A—C(O)—O—CH
2
—CH
2
—OH
units and/or
—(CH
2
—CH
2
—O)
n−1
—CH
2
—CH
2
—OH
units.
The characteristics of the (TPC) composition of the invention can be determined by subjecting said composition to the following analyses:
size exclusion chromatography (SEC) using a size exclusion chromatography device with simultaneous detection by refractometry and ultraviolet, using N,N-dimethylacetamide (DMAc) comprising 10
−2
mol/l of LiBr as eluent at 100° C.
This measurement (UV chromatography) makes it possible:
to detect the presence of the A (terephthalic) aromatic nuclei,
to determine the percentage of ethylene terephthalate homooligomer (PET
1
) in the terephthalic polyester composition (TPC),
to determine the weight-average molar mass of the block terephthalic copolymer (PET
2
/TE-POE), expressed in polystyrene equivalents.
proton nuclear magnetic resonance (
1
H NMR) using an NMR spectrometer in a CDCl
3
/deuterated hexafluoroisopropanol/deuterated trifluoroacetic anhydride mixture.
This measurement makes it possible to detect
the aromatic (terephthalic T) nuclei,
the oxyethylene units,
the mono(oxyethyleneoxy) (OEO) residues present in the oxyethylene aromatic diester (OAD) groups,
the polyoxyethylene terephthalate blocks (TE-POE), the units at the chain ends.
The calculation makes it possible to deduce therefrom:
the amount by weight of all the (TE) units in the terephthalic polyester composition (TPC),
the amount by weight of mono(oxyethyleneoxy) (OEO) residues in the terephthalic polyester composition (TPC).
Further information with regard to these analyses is given in the examples.
REFERENCES:
patent: 3981931 (1976-09-01), Smith
patent: 4116885 (1978-09-01), Derstadt et al.
patent: 4785060 (1988-11-01), Nagler
patent: 4999128 (1991-03-01), Sonenstein
patent: 5474854 (1995-12-01), Kagami et al.
patent: 5858551 (1999-01-01), Salsman
patent: 2 129 993 (1971-12-01), None
patent: 25 10 509 (1975-09-01), None
Database WPI Section Ch, Week 8509, Derwent Publications Ltd., London, GB; AN 85-052388, XP-002099902 and JP 60 008333 A (MTP Chem Co Ltd).
Bossennec Véronique
Dubois Jacques
Fleury Etienne
Rhodia Chimie
Short Patricia A.
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