CA2061713A1 - Composition and process for enhanced drainage of residual aqueous rinse on the external surface of plastic parts - Google Patents
Composition and process for enhanced drainage of residual aqueous rinse on the external surface of plastic partsInfo
- Publication number
- CA2061713A1 CA2061713A1 CA 2061713 CA2061713A CA2061713A1 CA 2061713 A1 CA2061713 A1 CA 2061713A1 CA 2061713 CA2061713 CA 2061713 CA 2061713 A CA2061713 A CA 2061713A CA 2061713 A1 CA2061713 A1 CA 2061713A1
- Authority
- CA
- Canada
- Prior art keywords
- polyethylene glycol
- glycol ester
- composition
- fluoride
- mixtures
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 55
- 229920003023 plastic Polymers 0.000 title claims abstract description 46
- 239000004033 plastic Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 79
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 79
- 150000002148 esters Chemical class 0.000 claims abstract description 44
- 150000002334 glycols Chemical class 0.000 claims abstract description 23
- 230000002708 enhancing effect Effects 0.000 claims abstract description 22
- -1 fluoride compound Chemical class 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 30
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 10
- 239000012736 aqueous medium Substances 0.000 claims description 10
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 6
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 6
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 6
- RFVNOJDQRGSOEL-UHFFFAOYSA-N 2-hydroxyethyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCCO RFVNOJDQRGSOEL-UHFFFAOYSA-N 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical group CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- 150000004671 saturated fatty acids Chemical class 0.000 claims description 5
- 229910001515 alkali metal fluoride Inorganic materials 0.000 claims description 3
- LDDQLRUQCUTJBB-UHFFFAOYSA-N ammonium fluoride Chemical class [NH4+].[F-] LDDQLRUQCUTJBB-UHFFFAOYSA-N 0.000 claims description 3
- 150000004673 fluoride salts Chemical class 0.000 claims description 3
- 229910001506 inorganic fluoride Inorganic materials 0.000 claims description 3
- 235000013024 sodium fluoride Nutrition 0.000 claims description 3
- 239000011775 sodium fluoride Substances 0.000 claims description 3
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid ester group Chemical group C(CCCCCCCCCCC)(=O)O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 claims 3
- 210000003195 fascia Anatomy 0.000 abstract description 2
- 239000008367 deionised water Substances 0.000 description 14
- 229910021641 deionized water Inorganic materials 0.000 description 14
- 239000012141 concentrate Substances 0.000 description 12
- 239000000243 solution Substances 0.000 description 9
- 239000003973 paint Substances 0.000 description 7
- 239000003599 detergent Substances 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000010422 painting Methods 0.000 description 5
- 230000002378 acidificating effect Effects 0.000 description 4
- 239000008399 tap water Substances 0.000 description 4
- 235000020679 tap water Nutrition 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 229920006380 polyphenylene oxide Polymers 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000012085 test solution Substances 0.000 description 2
- ALSTYHKOOCGGFT-KTKRTIGZSA-N (9Z)-octadecen-1-ol Chemical compound CCCCCCCC\C=C/CCCCCCCCO ALSTYHKOOCGGFT-KTKRTIGZSA-N 0.000 description 1
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 229920000443 Xenoy Polymers 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004071 biological effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229940055577 oleyl alcohol Drugs 0.000 description 1
- XMLQWXUVTXCDDL-UHFFFAOYSA-N oleyl alcohol Natural products CCCCCCC=CCCCCCCCCCCO XMLQWXUVTXCDDL-UHFFFAOYSA-N 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229940116254 phosphonic acid Drugs 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
Landscapes
- Detergent Compositions (AREA)
Abstract
ABSTRACT
A composition and process for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts, such as auto fascia, comprising a blend of a polyethylene glycol ester or mixture of polyethylene glycol esters with preferably a fluoride compound.
A composition and process for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts, such as auto fascia, comprising a blend of a polyethylene glycol ester or mixture of polyethylene glycol esters with preferably a fluoride compound.
Description
2 ~ ~ rl ~ 3 COMPOSITION AND PROCESS FOR ENHANCED DRAINAGE OF RESIDUAL
AQUEOUS RINSE ON THE EXTERNAL SURFACES OF PLASTIC PARTS
FIELD OF THE INVENTION
The present invention relates to compositions and processes for rinsing plastic parts. Aqueous solutions of polyethylene glycol esters with and without fluoride compounds are effective at enhancing the drainage of residual rinse water from the surfaces of the plastic parts.
BACKGROUND OF THE INVENTION
Plastic is painted for both cosmetic and functional reasons. These reasons include protectlon against weathering and fading, shielding electronic parts from electromagnetic and radio frequency interferences and achieving a smooth finish.
In the automotive industry, the formed plastic parts (fascia) used are often painted. This is to provide a smooth, oftentimes metal-like finish. The paint covers molding and other substrate imperfections. Decorative effects such as mirror finishes9 texturing and color match of differently proce,ssed parts are alsc achieved by painting.
~f~17~3 Most plastics need to be cleaned before painting them.
The most common contaminants that must be removed before painting are mold release agents, shop soil, material handling soil, machining soils, fingerprints and plastic sanding dust. These contaminants are removed by chemical means such as detergents.
The process of cleaning plastic parts generally Pntails a wash stage, a rinse stage and a f;nal rinse stage with deionized water. The plastic part can be either spray washed or immersed in the detergent. The most common processes are either an acidic detergent wash stage followed by multiple rinse stages, or an alkal;ne detergent stage, followed by a rinse stage, an acidic detergent wash stage, and multiple rinse stages.
When the plastic part is to be painted, the cleaning operation is performed in a production line with the freshly cleaned part sequentially conveyed into the paint booth.
Problems can occur however, when the freshly cleaned part is not fully dry. This can lead to "spotting" when painted and will result in an imperfect paint job. This will require stripping of the part and/or an additional painting procedure.
Removing the aqueous rinse water from the surface of the plastic requires a drainage enhancing solution which will effec-tively aid in drying the plastic part to be painted. The present inventors have discovered an aqueous solution which will aid in reducing spotting on the external surface of plastic parts.
2 ~
SUMMARY OF THE INVENTION
The present invention provides for a composition and process for enhancing the drainage of residual aqueous rinse from the external sur~aces of plastic parts comprising a polyethylene glycol ester or mixtures of polyethylene glycol esters.
More preferrably, the present invention provides for a composition and process for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts com-prising a polyethylene glycol ester or mixtures of polyethylene glycol esters and a fluoride compound.
The present invention effectively reduces the amount of water on the external surfaces of plastic parts prior to their painting. Any water left on the external surfaces can lead to spots or imperfections in the final paint finish. This invention is particularly effective for aiding the drainage of an aqueous rinse from the external surfaces of virgin and rework plastic used in the automotive industry.
DESCRIPTION OF THE RELATED ART
United States Patent 4,859,351, Awad, Au~ust 1989, discloses a composition and process for reducing the coef~icient of static frietiGn on the external surface of aluminum cans consisting essentially of either an ethoxylated fatty acid, a -- polyethoxyla~ed oleyl alcohol or an ethoxylated alkyl alcohol phosphate ester.
7 1'~
United States Patent 4,500,493, Scharf et al., December 1985, discloses a composition and method for reducing the liquid residue remaining on a metal surface consisting of octane-1-phos-phonic acid or water soluble salt thereof.
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides for a composition and process for enhancing the drainage of residual aqueous rinse from the extern~l surfaces of plastic parts comprising a polyethylene glycol ester or mixtures of polyethylene glycol esters.
More preferrably, the present invention provides for a composition and process for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts com-prising a polyethylene glycol ester or mixtures of polyethylene glycol esters and a fluoride compound~
The polyethylene glycol esters are preferablr the water soluble derivatives of a saturated fatty acid such as an ethoxy-lated stearic acid, for example, polyethylene glycol monostearate.
Unsaturated fatty acids may also be used but are less preferable.
In the preferred treatment composition, depending upon the chemistry of the detergent wash, the fluoride compound is added to the drainage enhancing solution for several reasons. Fluoride ion may combine with and remove ions causing hardness, such as calcium and magnesium ions, which may be objectionable under a paint film.
--s--The fluoride ion may be used to track rates of addition of the drainage enhancing solution through the use of an ion specific electrode. Fluoride ion may also be used to suppress biological activity.
The fluoride compound may be added to the polyethylene glycol ester by means of any known fluoride compound. Examples include alkali metal fluorides, such as sodium fluoride, ammonium fluoride salts, such as ammonium fluoride and ammonium bi~luoride, other inorganic fluoride salts and hydrofluoric acid, HF.
The polyethylene glycol ester and fluoride are preferably blended together in an aqueous medium, such as deionized water, at various concentrations. The ester may be added to the aqueous medium in the concentration of from about 1.0% to 10.0% by weight.
Typically, however, the concentration will be from about 2.5% to about 5.0%.
The fluoride is present at a much smaller concentration, typically between about 0.01% and about 0.5% by welght, as ~luoride.
The aqueous concentrate desi~nated treatment A in accordance with the present invention comprises
AQUEOUS RINSE ON THE EXTERNAL SURFACES OF PLASTIC PARTS
FIELD OF THE INVENTION
The present invention relates to compositions and processes for rinsing plastic parts. Aqueous solutions of polyethylene glycol esters with and without fluoride compounds are effective at enhancing the drainage of residual rinse water from the surfaces of the plastic parts.
BACKGROUND OF THE INVENTION
Plastic is painted for both cosmetic and functional reasons. These reasons include protectlon against weathering and fading, shielding electronic parts from electromagnetic and radio frequency interferences and achieving a smooth finish.
In the automotive industry, the formed plastic parts (fascia) used are often painted. This is to provide a smooth, oftentimes metal-like finish. The paint covers molding and other substrate imperfections. Decorative effects such as mirror finishes9 texturing and color match of differently proce,ssed parts are alsc achieved by painting.
~f~17~3 Most plastics need to be cleaned before painting them.
The most common contaminants that must be removed before painting are mold release agents, shop soil, material handling soil, machining soils, fingerprints and plastic sanding dust. These contaminants are removed by chemical means such as detergents.
The process of cleaning plastic parts generally Pntails a wash stage, a rinse stage and a f;nal rinse stage with deionized water. The plastic part can be either spray washed or immersed in the detergent. The most common processes are either an acidic detergent wash stage followed by multiple rinse stages, or an alkal;ne detergent stage, followed by a rinse stage, an acidic detergent wash stage, and multiple rinse stages.
When the plastic part is to be painted, the cleaning operation is performed in a production line with the freshly cleaned part sequentially conveyed into the paint booth.
Problems can occur however, when the freshly cleaned part is not fully dry. This can lead to "spotting" when painted and will result in an imperfect paint job. This will require stripping of the part and/or an additional painting procedure.
Removing the aqueous rinse water from the surface of the plastic requires a drainage enhancing solution which will effec-tively aid in drying the plastic part to be painted. The present inventors have discovered an aqueous solution which will aid in reducing spotting on the external surface of plastic parts.
2 ~
SUMMARY OF THE INVENTION
The present invention provides for a composition and process for enhancing the drainage of residual aqueous rinse from the external sur~aces of plastic parts comprising a polyethylene glycol ester or mixtures of polyethylene glycol esters.
More preferrably, the present invention provides for a composition and process for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts com-prising a polyethylene glycol ester or mixtures of polyethylene glycol esters and a fluoride compound.
The present invention effectively reduces the amount of water on the external surfaces of plastic parts prior to their painting. Any water left on the external surfaces can lead to spots or imperfections in the final paint finish. This invention is particularly effective for aiding the drainage of an aqueous rinse from the external surfaces of virgin and rework plastic used in the automotive industry.
DESCRIPTION OF THE RELATED ART
United States Patent 4,859,351, Awad, Au~ust 1989, discloses a composition and process for reducing the coef~icient of static frietiGn on the external surface of aluminum cans consisting essentially of either an ethoxylated fatty acid, a -- polyethoxyla~ed oleyl alcohol or an ethoxylated alkyl alcohol phosphate ester.
7 1'~
United States Patent 4,500,493, Scharf et al., December 1985, discloses a composition and method for reducing the liquid residue remaining on a metal surface consisting of octane-1-phos-phonic acid or water soluble salt thereof.
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides for a composition and process for enhancing the drainage of residual aqueous rinse from the extern~l surfaces of plastic parts comprising a polyethylene glycol ester or mixtures of polyethylene glycol esters.
More preferrably, the present invention provides for a composition and process for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts com-prising a polyethylene glycol ester or mixtures of polyethylene glycol esters and a fluoride compound~
The polyethylene glycol esters are preferablr the water soluble derivatives of a saturated fatty acid such as an ethoxy-lated stearic acid, for example, polyethylene glycol monostearate.
Unsaturated fatty acids may also be used but are less preferable.
In the preferred treatment composition, depending upon the chemistry of the detergent wash, the fluoride compound is added to the drainage enhancing solution for several reasons. Fluoride ion may combine with and remove ions causing hardness, such as calcium and magnesium ions, which may be objectionable under a paint film.
--s--The fluoride ion may be used to track rates of addition of the drainage enhancing solution through the use of an ion specific electrode. Fluoride ion may also be used to suppress biological activity.
The fluoride compound may be added to the polyethylene glycol ester by means of any known fluoride compound. Examples include alkali metal fluorides, such as sodium fluoride, ammonium fluoride salts, such as ammonium fluoride and ammonium bi~luoride, other inorganic fluoride salts and hydrofluoric acid, HF.
The polyethylene glycol ester and fluoride are preferably blended together in an aqueous medium, such as deionized water, at various concentrations. The ester may be added to the aqueous medium in the concentration of from about 1.0% to 10.0% by weight.
Typically, however, the concentration will be from about 2.5% to about 5.0%.
The fluoride is present at a much smaller concentration, typically between about 0.01% and about 0.5% by welght, as ~luoride.
The aqueous concentrate desi~nated treatment A in accordance with the present invention comprises
3.0% by weight polyethylene glycol (MW=600) monostearate 0.5% by weight polyethylene glycol (MW=1000) monostearate 0.06% by weight ammonium fluoride in deionized water.
-6 ~ ~ f3 ~ 7 ~ 3 The aqueous concentrate designated treatment B in accordance with the present invention comprises.
3.0% by weight polyethylene glycol (MW=600) monolaurate 0.5% by weight polyethylene glycol (MW=1000) monostearate 0.06% by weight ammonium fluoride in deionized water.
The concentrate is dissolved within the aqueous medium in a concentration o~ about 0.1% v/v to about 5.0% vtV.
Pre~erably, the total concentration of the polyethylene glycol ester or mixtures of polyethylene glycol esters when the inventive concentrate is employed ranges from about 0.001% to about 0.5%, more preferably 0.004% to about 0.08~. The concentration of the fluoride compound will range from about 0.3 parts per mill;on to about 40 parts per million per million parts deionized water as fluoride ion.
It should be understood that the polyethylene glycol ester and fluoride components may be added separately to the aqueous rinse thus avoiding the preparation of a concentrate.
Either method is within the purview of this invention. The process of applying the diluted concentrate may be either by spraying the plastic part or by immersing the plastic part in the diluted concentrate.
Most plastics are paintable with the appropriate choice of paint. However, some plastics will not accept paint I
2 ~
(poor "wet-out" or adhesion) regardless of the cleanliness of their surfaces. Examples of plastics that are paintable and used in the automotive industry include polycarbonate/polybutylene terephthalate, polyphenyleneoxide/nylon 66, polyphenyleneoxide/
polybutylene terephthalate, polyether-polyester copolymer/poly-butylene terephthalate, polycarbonate (both unfilled and glass filled), polyphenyleneoxide (both unfilled and filled) and a resin/glass material.
The invPntion will now be further described with reference to a number of specific examples which are to be regarded solely as illustrative, and not as restricting the scope of the invention.
EXAMPLES
Automotive grade plastic in the form of virgin and rework parts were cleaned in the following sequence:
Sta~ Ireatment SteP
1 3% Kleen 132 alkaline wash, 1 minute spray at 140F
2 Tap water rinse 3 1% Permatreat 325, acidic wash 30 second spray at 130F
-6 ~ ~ f3 ~ 7 ~ 3 The aqueous concentrate designated treatment B in accordance with the present invention comprises.
3.0% by weight polyethylene glycol (MW=600) monolaurate 0.5% by weight polyethylene glycol (MW=1000) monostearate 0.06% by weight ammonium fluoride in deionized water.
The concentrate is dissolved within the aqueous medium in a concentration o~ about 0.1% v/v to about 5.0% vtV.
Pre~erably, the total concentration of the polyethylene glycol ester or mixtures of polyethylene glycol esters when the inventive concentrate is employed ranges from about 0.001% to about 0.5%, more preferably 0.004% to about 0.08~. The concentration of the fluoride compound will range from about 0.3 parts per mill;on to about 40 parts per million per million parts deionized water as fluoride ion.
It should be understood that the polyethylene glycol ester and fluoride components may be added separately to the aqueous rinse thus avoiding the preparation of a concentrate.
Either method is within the purview of this invention. The process of applying the diluted concentrate may be either by spraying the plastic part or by immersing the plastic part in the diluted concentrate.
Most plastics are paintable with the appropriate choice of paint. However, some plastics will not accept paint I
2 ~
(poor "wet-out" or adhesion) regardless of the cleanliness of their surfaces. Examples of plastics that are paintable and used in the automotive industry include polycarbonate/polybutylene terephthalate, polyphenyleneoxide/nylon 66, polyphenyleneoxide/
polybutylene terephthalate, polyether-polyester copolymer/poly-butylene terephthalate, polycarbonate (both unfilled and glass filled), polyphenyleneoxide (both unfilled and filled) and a resin/glass material.
The invPntion will now be further described with reference to a number of specific examples which are to be regarded solely as illustrative, and not as restricting the scope of the invention.
EXAMPLES
Automotive grade plastic in the form of virgin and rework parts were cleaned in the following sequence:
Sta~ Ireatment SteP
1 3% Kleen 132 alkaline wash, 1 minute spray at 140F
2 Tap water rinse 3 1% Permatreat 325, acidic wash 30 second spray at 130F
4 Tap water rinse Deionized water rinse Kleen 132 and Permatreat 325 are tradenames of Betz Laboratories, Inc.
-8- ~0~7.~3 To evaluate the efficacy of the inventive concentrate as a rinse enhancer, dilute solutions of the concentrate were used in place oF the deionized water spray rinse in Stage 5. The results are reported in Table I. The concentrate evaluated was Treatment A.
TABLE I
Concentration Observations Deionized Water Heavy beading on virgin plastic Some sheeting on rework plastic 0.3% v/v Heavy beading on virgin plastic Improved sheeting on rework plastic 0.6% v/v Smaller beading on virgin plastic Sheeting better on rework plastic 1.0% v/v 30% improvement, smaller beads on virgin plastic 30% sheeting on virgin plastic sheeting well on rework plastic.
2 to 3 minutes after initial observations were made, deionized water and 0.3% solution had water beads on the surface.
0.6% solution was almost completely drained of water while 1.0%
solution was even better.
From these observations, it can be seen that the inventive treatment is effective at enhancing the drainaye of rinse water from the surfaces of plastic parts.
g Quantitative tests were also performed to determ;ne the efficacy of the inventive concentrates. A 4 inch by 3 inch plastic piece (trade name, Xenoy, available from General Electric) underwent the following processing:
Staqe Treatment Step 1 3% Kleen 132 alkaline wash, 1 minute spray at 140F
2 Tap water rinse 3 2% Permatreat 302 acidic wash, 30 second spray at 135F
4 Tap water rinse Deionized water rinse Kleen 132 and Permatreat 302 are tradenames of Betz Laboratories, Inc.
To evaluate the inventive concentrates, dilute solutions in deionized water were used in place of the deionized water in Stage 5. The plastic part was weighed, processed as per the above sequence, allowed to drain 1 minute, then reweighed. The results for Treatment B are reported in Table II. Treatment B was also tested with various levels of ammonium fluoride. These results appear in Table III.
-10- 2~7:~3 TABLE II
Average % ~ater Welght of Retained Reduction Compared Test Solution Water Grams Per Part To Deionized Water Deionized 1.2059 Water 0.8885 1.1573 0.9322 Treatment B 0.3155 70.0 0.5% 0.3130 Tr~atment B 0.2799 73.0 1.0% ~.2871 Treatment B 0.3864 67.3 1.5% 0.3000 These results clearly showed improved drainage with use of the inventive composition. Treatment B caused the solution to sheet on this plastic.
TABLE IIT
Weight of Retained Test_Solution Water Grams Per Part Deionized Water 1.046 Treatment B 1.5%
0 ppm F 0.2914 Treatm~nt B 1.5%
-8- ~0~7.~3 To evaluate the efficacy of the inventive concentrate as a rinse enhancer, dilute solutions of the concentrate were used in place oF the deionized water spray rinse in Stage 5. The results are reported in Table I. The concentrate evaluated was Treatment A.
TABLE I
Concentration Observations Deionized Water Heavy beading on virgin plastic Some sheeting on rework plastic 0.3% v/v Heavy beading on virgin plastic Improved sheeting on rework plastic 0.6% v/v Smaller beading on virgin plastic Sheeting better on rework plastic 1.0% v/v 30% improvement, smaller beads on virgin plastic 30% sheeting on virgin plastic sheeting well on rework plastic.
2 to 3 minutes after initial observations were made, deionized water and 0.3% solution had water beads on the surface.
0.6% solution was almost completely drained of water while 1.0%
solution was even better.
From these observations, it can be seen that the inventive treatment is effective at enhancing the drainaye of rinse water from the surfaces of plastic parts.
g Quantitative tests were also performed to determ;ne the efficacy of the inventive concentrates. A 4 inch by 3 inch plastic piece (trade name, Xenoy, available from General Electric) underwent the following processing:
Staqe Treatment Step 1 3% Kleen 132 alkaline wash, 1 minute spray at 140F
2 Tap water rinse 3 2% Permatreat 302 acidic wash, 30 second spray at 135F
4 Tap water rinse Deionized water rinse Kleen 132 and Permatreat 302 are tradenames of Betz Laboratories, Inc.
To evaluate the inventive concentrates, dilute solutions in deionized water were used in place of the deionized water in Stage 5. The plastic part was weighed, processed as per the above sequence, allowed to drain 1 minute, then reweighed. The results for Treatment B are reported in Table II. Treatment B was also tested with various levels of ammonium fluoride. These results appear in Table III.
-10- 2~7:~3 TABLE II
Average % ~ater Welght of Retained Reduction Compared Test Solution Water Grams Per Part To Deionized Water Deionized 1.2059 Water 0.8885 1.1573 0.9322 Treatment B 0.3155 70.0 0.5% 0.3130 Tr~atment B 0.2799 73.0 1.0% ~.2871 Treatment B 0.3864 67.3 1.5% 0.3000 These results clearly showed improved drainage with use of the inventive composition. Treatment B caused the solution to sheet on this plastic.
TABLE IIT
Weight of Retained Test_Solution Water Grams Per Part Deionized Water 1.046 Treatment B 1.5%
0 ppm F 0.2914 Treatm~nt B 1.5%
5 ppm F 0.2961 Treatment B 1.5%
50 ppm F 0.3504 2 ~ 3 --I, .
While this invention has been described with respect to particular embodiments thereof, it is apparent that numerous other forms and modifications of this invention w;ll be obv~ous to those skilled in the art. ~
50 ppm F 0.3504 2 ~ 3 --I, .
While this invention has been described with respect to particular embodiments thereof, it is apparent that numerous other forms and modifications of this invention w;ll be obv~ous to those skilled in the art. ~
Claims (42)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A composition for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts comprising a polyethylene glycol ester or mixtures of polyethylene glycol esters and a fluoride compound.
2. The composition of claim 1 wherein said polyethylene glycol ester or mixtures of polyethylene glycol esters and said fluoride compound are blended in an aqueous medium.
3. The composition of claim 1 wherein the concentration of said polyethylene glycol ester or mixtures of polyethylene glycol esters in said aqueous medium is from about 1.0% to about 10.0% by weight.
4. The composition of claim 1 wherein the concentration of said polyethylene glycol ester or mixtures of polyethylene glycol esters in said aqueous medium is from about 2.5% to about 5.0% by weight.
5. The composition of claim 1 wherein the concentration of said fluoride in said aqueous medium is from about 0.01% to about 0.5% by weight.
6. The composition of claim 1 wherein said polyethylene glycol ester is a water soluble derivative of a saturated fatty acid.
7. The composition of claim 6 wherein said poly-ethylene glycol ester is an ethoxylated stearic acid.
8. The composition of claim 6 wherein said poly-ethylene glycol ester is polyethylene glycol monostearate.
9. The composition of claim 6 wherein said poly-ethylene glycol ester is polyethylene glycol monolaurate.
10. The composition of claim 1 wherein said fluoride compound is selected from the group consisting of alkali metal fluorides, inorganic fluoride salts, ammonium fluoride salts and hydrofluoric acid.
11. The composition of claim 1 wherein said fluoride compound is ammonium fluoride.
12. The composition of claim 1 wherein said fluoride compound is sodium fluoride.
13. A process for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts com-prising contacting an effective amount for the purpose of to said plastic parts a drainage enhancing solution of a polyethylene glycol ester or mixture of polyethylene glycol esters and a fluoride compound.
14. The process as claimed in claim 13 wherein said polyethylene glycol ester is a water soluble derivative of a saturated fatty acid.
15. The process as claimed in claim 13 wherein said polyethylene glycol ester is an ethoxylated stearic acid.
16. The process as claimed in claim 13 wherein said polyethylene glycol ester is an ethoxylated lauric acid.
17. The process as claimed in claim 13 wherein said polyethylene glycol ester is polyethylene glycol monostearate.
180 The process as claimed in claim 13 wherein said polyethylene glycol ester is polyethylene glycol monolaurate.
19. The process as claimed in claim 13 wherein said fluoride compound is selected from the group consisting of alkali metal fluorides, inorganic fluoride salts, ammonium fluoride salts and hydrofluoric acid.
20. The process as claimed in claim 13 wherein said fluoride is ammonium fluoride.
21. The process as claimed in claim 13 wherein said fluoride is sodium fluoride.
22. The process as claimed in claim 13 wherein the concentration of said polyethylene glycol ester or mixtures of polyethylene glycol esters in said drainage enhancing solution is from about 0.001% to about 0.5%.
23. The process as claimed in claim 13 wherein the concentration of said polyethylene glycol ester or mixtures of polyethylene glycol esters in said drainage enhancing solution is from about .004% to about 0.08%.
24. The process as claimed in claim 13 wherein the concentration of said fluoride compound in said drainage enhancing solution is from about 0.3 to about 40 parts per million as F.
25. The process as claimed in claim 13 wherein said polyethylene glycol ester or mixtures of polyethylene glycol esters and said fluoride compound are added separately to said drainage enhancing solution.
26. A process for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts com-prising contacting an effective amount for the purpose of to said plastic parts a drainage enhancing solution of a polyethylene glycol ester or mixture of polyethylene glycol esters.
27. The process as claimed in claim 26 wherein said polyethylene glycol ester is polyethylene glycol monostearate.
28. The process as claimed in claim 26 wherein said polyethylene glycol ester is polyethylene glycol monolaurate.
29. The process as claimed in claim 26 wherein the concentration of said polyethylene glycol ester or mixtures of polyethylene glycol esters in said drainage enhancing solution is from about 0.001% to about 0.5%.
30. The process as claimed in claim 26 wherein the concentration of said polyethylene glycol ester or mixtures of polyethylene glycol esters in said drainage enhancing solution is from about .004% to about 0.08%.
31. The process as claimed in claim 26 wherein said polyethylene glycol ester is a water soluble derivative of a saturated fatty acid.
32. The process as claimed in claim 26 wherein said polyethylene glycol ester is an ethoxylated stearic acid.
33. The process as claimed in claim 26 wherein said polyethylene glycol ester is an ethoxylated lauric acid.
34. A composition for enhancing the drainage of residual aqueous rinse from the external surfaces of plastic parts comprising a polyethylene glycol ester or mixtures of polyethylene glycol esters.
35. The composition as claimed in claim 34 wherein said polyethylene glycol ester or mixtures of polyethylene glycol esters are blended in an aqueous medium.
36. The composition as claimed in claim 34 wherein the concentration of said polyethylene glycol ester or mixtures of polyethylene glycol esters in said aqueous medium is from about 1.0%
to about 10.0% by weight.
to about 10.0% by weight.
37. The composition as claimed in claim 34 wherein the concentration of said polyethylene glycol ester or mixtures of polyethylene glycol esters in said aqueous medium is from about 2.5%
to about 5.0% by weight.
to about 5.0% by weight.
38. The composition as claimed in claim 34 wherein said polyethylene glycol ester is a water soluble derivative of a saturated fatty acid.
39 The composition as claimed in claim 38 wherein said polyethylene glycol ester is an ethoxylated stearic acid.
40. The composition as claimed in claim 38 wherein said polyethylene glycol ester is an ethoxylated lauric acid.
41. The composition as claimed in claim 38 wherein said polyethylene glycol ester is polyethylene glycol monostearate.
42. The composition as claimed in claim 38 wherein said polyethylene glycol ester is polyethylene glycol monolaurate.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68541791A | 1991-04-12 | 1991-04-12 | |
| US07/685,417 | 1991-04-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2061713A1 true CA2061713A1 (en) | 1992-10-13 |
Family
ID=24752122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2061713 Abandoned CA2061713A1 (en) | 1991-04-12 | 1992-02-24 | Composition and process for enhanced drainage of residual aqueous rinse on the external surface of plastic parts |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2061713A1 (en) |
-
1992
- 1992-02-24 CA CA 2061713 patent/CA2061713A1/en not_active Abandoned
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