|
|
Solvent meets aerospace criteria |
|
Banner Chemicals
Group, the United Kingdom, has announced that the Evolve
range of solvents originally developed as an alternative
to 1,1,1, trichloroethane for cold-cleaning applications by
ICI meets the needs of aerospace applications. Its ability
to match the strict criteria of aerospace applications has
resulted in companies including BAE, Rolls-Royce, British
Airways, UKMOD and Leica approving Evolve for use.
A rapidly evaporating, no-residue and odourless product,
Evolve removes oils, greases, shop soils and related
contamination from all types of metals. Being odourless,
worker comfort is enhanced and a high occupational exposure
limit enables a range of uses. Contact: Banner Chemicals
Group, Hampton Court, Manor Park, Runcorn WA7 1TU, United
Kingdom. Tel: +44 (1928) 597 000; Fax: +44 (1928) 597001;
E-mail: info@bannerchemicals.com.
Source:
www.manufacturingtalk.com |
|
|
|
|
Ozone-safe metal cleaning fluids |
|
|
Aragorn Resources,
the Philippines, offers ozone-safe paraffinic hydrocarbon
cleaners. Hydroclin cleaners are specifically developed for
ultrasonic and heated washing machines. This high-quality
product will not leave any residue, is non-reactive and
non-staining to metals. The cleaning efficiency is comparable
to chlorinated solvents and chlorofluorocarbons minus the
ozone depleting potential, as the vapours naturally decompose
upon exposure to sunlight. Hydroclin has excellent distilling
and recovery properties, and retains its quality even after
considerably long thermal exposure. It is available in
different grades, drying time and boiling point or
distillation ranges for customer preference.
Isoclin cleaners are super premium quality paraffinic
hydrocarbon cleaners, which are virtually odourless, 100 per
cent volatile and residue-free for spotless drying. They are
for the same applications as Hydroclin cleaners, as well as
for highly sensitive applications requiring the highest
possible quality and lowest odour levels. The product is
environment-friendly and does not contribute to ozone layer
degradation. Ionic micro corrosion is virtually impossible
with the use of this product. It is available in several
grades with different boiling ranges and drying times to suit
particular applications. Contact: Aragorn Resources, 5-B
Poblete Compound, 343 West Service Road, Sun Valley, Paranaque
City, The Philippines. Tel: +63 (2) 776 1358; Fax: +63 (2) 541
9735; E-mail: info @aragornchem.com.
Source:
www.aragornchem.com
|
|
|
|
|
Ultrasonic cleaning tanks for soft metals |
|
|
Industrial quality
Kerry ultrasonic tanks, from Guyson International in the
United Kingdom, provide speedy cleaning for welded metal
joints on a variety of materials including aluminium and
copper. These are suitable particularly where the raw metal
material is being used without paint or other coating to mask
any discolouration on the components.
Pulsatron UCR and KS tanks are used to rid the components of
weld discolouration. These tanks allow the user to preset
exact cleaning times and temperatures, ensuring that
consistent levels of cleanliness are kept from batch to batch
and providing an affordable way to improve cleaning quality.
All functions are controlled by a simple four-button membrane
keypad. An LCD panel displays the temperature and time set by
the user, the time elapsed since the start of the cleaning
process, and the status of the power supply, heater and
ultrasonics.
Each unit works within operating temperatures from 20 to
80C, which can be set in 1 increments, allowing the optimum
temperature to be selected for a particular combination of
component material, cleaning solution and contaminant. Sonics
time may be set in the range 0.1-99.9 min in 0.1 min
increments, or to constant when sonics may be switched on and
off manually. KS and UCR ultrasonic clean and rinse systems
come in a range of sizes: Standard KS ultrasonic tanks come in
a range of sizes up to 248 litre capacity, while UCR ultra
clean and rinse tanks come in capacities to 117 litres.
Contact: Guyson International, Snaygill Industrial Estate,
Keighley Road, Skipton, North Yorkshire, BD23 2QR, United
Kingdom. Tel: +44 (1756) 799 911. E-mail: leeds@ guyson.co.uk.
Source:
www.manufacturingtalk.com
|
|
|
|
|
N-propyl bromide-based machining fluid formulations |
|
|
Garrett Services,
the United States, has patented a machining fluid admixture
comprising a major amount of n-propyl bromide and a minor
amount of a lubricant for cooling and lubricating a tool/
workpiece interface. The machining fluid consists of about
30.0 to about 99.99 weight per cent n-propyl bromide, about
0.01 to about 30.0 weight per cent of a lubricant, and
optionally up to about 70.0 weight per cent of a fluorinated
chemical.
The lubricant component of the machining fluids may be a
mineral oil, a synthetic lubricating oil or a mixture thereof.
The synthetic lubricating oil may or may not have a halogen
constituent, and may be selected from a polyol ester, a
polyalkylene glycol, a glycol ether, an isoparaffin or a
mixture thereof. The polyalkylene glycol may be ethylene
glycol monobutyl ether, propylene glycol methyl ether or their
mixture, while the isoparaffin may be 2,2,4-trimethylpentane.
The fluorinated chemical component of the inventive machining
fluids may have the formula CaFbHcNdOe wherein a = 2 to 8, b =
5 to 18, c = 0 to 13, d = 0 to 2 and e = 0 to 2; for example,
1,1,1,2,3.4,4,5,5,5-decafluoropentane,
1-methoxy-nonafluorobutane or a mixture thereof.
Source:
www.freepatentsonline.com
|
|
|
|
|
Cosmetics with hydrofluoroether |
|
Daikin
Industries Ltd., Japan, has been assigned a United States
patent on a cosmetic containing at least 1 per cent by
weight of hydrofluoroether having a viscosity of less than 5
mPas at 25C. The HFE is represented by the general formula
CnHmFlOCxHyFz wherein n is a number from 1 to 12, m is a
number of 0 to 25, l is a number from 0 to 11 and m+1 = 2n =
2x+1, and x is a number from 1 to 12, y is a number from 0
to 25, z is a number from 0 to 11 and y+z = 2x+1, provided
that m and y, and l and z, are not zero simultaneously.
The inventors have found that a partially fluorinated
fluorine-containing solvent (HFE) is highly safe for the
skin and has low or no influence on the environment. The HFE
has high solubility in a fluorine-containing oil used
frequently in cosmetics and high dispersibility in fluorine
compound-treated powders.
Source:
www.freepatentsonline.com
|
|
|
|
Dry cleaning compositions
containing hydrofluoroether |
|
A major concern
in solvent cleaning is the tendency (especially where
solvent is used at a high temperature) for solvent vapour
loss from the cleaning system into the atmosphere. Although
care is generally taken to minimize such losses (for
example, through vapour recovery systems), most cleaning
applications result in some loss of solvent vapour into the
atmosphere. Furthermore, solvent cleaning methods have
traditionally utilized chlorinated solvents, alone or in
admixture, linked to ozone depletion.
Partially fluorinated ethers have been suggested as
alternatives to chlorinated solvents. 3M Innovative
Properties Company, the United States, has patented dry
cleaning compositions containing hydrofluoroethers (HFEs), a
co-solvent, a detergent, and water in an amount of less than
1 per cent by weight. The patent also describes a method of
cleaning fabric articles using the patented dry cleaning
composition. The co-solvent is selected from the group
consisting of alkanols, ethers, glycol ethers,
perfluoroethers, perfluorinated tertiary amines, alkanes,
alkenes, perfluorocarbons, terpenes, glycol ether acetates,
hydrofluorocarbons, hydrochlorofluorocarbons, non-ionic
fluorinated surfactants, cycloalkanes, siloxanes, ketones
and combinations thereof.
HFEs suitable for use in the process are low-polarity
chemical compounds, minimally containing carbon, fluorine,
hydrogen and catenary (that is, in-chain) oxygen atoms. HFEs
can optionally contain additional catenary heteroatoms, such
as nitrogen and sulphur. Their molecular structures can be
linear, branched or cyclic, or a combination thereof. They
are preferably free of ethylenic unsaturation, having a
total of about 4-20 carbon atoms. Such HFEs are readily
available, either as essentially pure compounds or as
mixtures.
Preferred HFEs can have a boiling point in the range from
about 40 to 275C, preferably 50 to 121C, and have a
higher vapour pressure than that of perchloroethylene, thus
increasing the dry time of the cleaned fabric. Contact: 3M
Innovative Properties Company, 3M Centre, P.O. Box 33427,
St. Paul, MN 55133-3427, United States of America.
Source:
www.freepatentsonline.com
|
|
|
|
|