US2402437A - Lacquer - Google Patents
Lacquer Download PDFInfo
- Publication number
- US2402437A US2402437A US567328A US56732844A US2402437A US 2402437 A US2402437 A US 2402437A US 567328 A US567328 A US 567328A US 56732844 A US56732844 A US 56732844A US 2402437 A US2402437 A US 2402437A
- Authority
- US
- United States
- Prior art keywords
- lacquer
- weight
- film
- improved
- ethyl cellulose
- 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.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
- C09D101/08—Cellulose derivatives
- C09D101/26—Cellulose ethers
- C09D101/28—Alkyl ethers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
Definitions
- This invention relates "to lacquers and is more particularly concerned with the production of a lacquer that is suitable for application to insu- For such purposes it is desirable that the lacquer should yield a lacquer film thatmaintains its flexibility over 1 can. (011. 106--171) a wide temperature range, for instance, a range extending from 2 C. to 150 C.
- the lacquer film should be both hard and tough and should not fuse to adjacent lacquer films under'high operating temperatures.
- my improved lacquer comprises a solution containing ethyl cellulose having an ethoxy content of-from 43.5%
- a solvent for the ethyl cellulose and the plasticisers I prefer a mixture of benzene and alcohol (methylated spirit) in which the benzene predominates, the optimum proportion of benzene to alcohol being of the. order of 2 to l.
- acetone may be substituted for a part of the benzene, but this will entail a slight increase in the viscosity of the lacquer.
- compositions of my improved lac-- quers are given in Table I below:
- my improved lacquer may incorporate a spirit-soluble dye.
- the amount of dye used is of the order of 0.5% by weight on they ethyl cellulose content of the lacquer. Conveniently it is added as a 1% solution in alcohol, in which.
- Friction test do. l. 0 1.5 l. 5 l. 6 Over 6
- the Shore hardness at 20 C. wa measured, applying the durometer by hand, initially and after 30 seconds application.
- the fiow test consistd in pressing together two films under a pressure of l lb. per square inch for two hours at 150 C. and in measuring the weight necessary o p r e the fi s after cooling to room temperature for one hour. The value recorded is in pounds per One inch width of film.
- the frictionai properties of the film were assessed byfixing it to a cylindrical metal disc having a diameter of 2.5 inches and a thickness of 0.5 inch I placing the film covered disc on to another film 0t lacquer so that the two films were in contact, and measuring the horizontally applied force in pounds required Just to keep the one film slidin over the other when a 7 lb. weight had been placed on the disc.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Paints Or Removers (AREA)
- Lubricants (AREA)
Description
lated electric wires and, cables.
Patented June 18, 1946 ton, England, assignor to British Insulated Cables Limited, Prescot, Lancashire, England,
a. British company No Drawing. Application December 8, 1944, Se-
rial No. 567,328. In Great Britain January 22, 1944 This invention relates "to lacquers and is more particularly concerned with the production of a lacquer that is suitable for application to insu- For such purposes it is desirable that the lacquer should yield a lacquer film thatmaintains its flexibility over 1 can. (011. 106--171) a wide temperature range, for instance, a range extending from 2 C. to 150 C. The lacquer film should be both hard and tough and should not fuse to adjacent lacquer films under'high operating temperatures. It should also be resistant to hot oil, petrol and water and should have a low co-efllcient of friction that will permit a lacquer co'ated insulated wire or cable to slide easily over similar wires or cables with which I it is in contact. It is the object of my invention to produce an improved lacquer'that will yield lacquer films p s g the aforesaid characteristics to a high degree.
In accordance with the invention my improved lacquer comprises a solution containing ethyl cellulose having an ethoxy content of-from 43.5%
to 46.5% and a viscosity of from 100 to 250 centiing zero to a value approaching 55%, corres ond-L ing to an average value of from nearly 0 to 3 ethyl radicals per glucose unit. The selected range which I employ with the specified proportions of particular plasticisers in order to obtain my' improved heat-resistant lacquers is comparatively narrow, being from 43.5% to 46.5%.
corresponding to an average value of 2.15 to'2.35 ethyl radicals per glucose unit.
As a solvent for the ethyl cellulose and the plasticisers I prefer a mixture of benzene and alcohol (methylated spirit) in which the benzene predominates, the optimum proportion of benzene to alcohol being of the. order of 2 to l.
' If desired acetone may be substituted for a part of the benzene, but this will entail a slight increase in the viscosity of the lacquer.
Examples of compositions of my improved lac-- quers are given in Table I below:
Table I I 11 111. IV
Ethyl cellulose having ethoxy content of I Ki-46.5% .and viscosity of 150 one -.grams-. 10.0 10.0 10.0 10.0 Castor oil (raw or bodied) .do.... 4. 0 6.0 4. 5 5. 0 TransformeroiL do 2.0 2.0 2.2 Y 2.2 Petroleum jelly -do 2. 0 '2. 0 2. 2 2. 2 enzene "cubic centimeters.. 42 42 42 42 Alcohol (methylated spirit) .do 18 18 l8 18 If desired my improved lacquer may incorporate a spirit-soluble dye. The amount of dye used ,is of the order of 0.5% by weight on they ethyl cellulose content of the lacquer. Conveniently it is added as a 1% solution in alcohol, in which.
case the proportion to be used with each of the compositions specified in Table I above is 5 cos.
the lacquers given in Table I, and for purposes of comparison, from a lacquer, designated V, which prior to my invention has been regarded as the most satisfactory for the purpose in view.
Table II Test on fllm I II III IV V Tensile strength .lbs. per sq. in. 2,050 2, 475 2, 650 2, 450 1,050 Percentage elongation at break 55 70 60 Product of tensile strength and elongation X 10-4.... 11. 2 l8. 6 14. 6 l7. 2 6. 3 Shore hardness at 20 C. -93 8886 95-93 93-90 87-85 Shore hardness at C... 45 20 45 42 45 low test pounds 0.25 0.2 0. 3 0. 2 0. 2
Friction test do. l. 0 1.5 l. 5 l. 6 Over 6 The Shore hardness at 20 C. wa measured, applying the durometer by hand, initially and after 30 seconds application. The fiow test consistd in pressing together two films under a pressure of l lb. per square inch for two hours at 150 C. and in measuring the weight necessary o p r e the fi s after cooling to room temperature for one hour. The value recorded is in pounds per One inch width of film. The frictionai properties of the film were assessed byfixing it to a cylindrical metal disc having a diameter of 2.5 inches and a thickness of 0.5 inch I placing the film covered disc on to another film 0t lacquer so that the two films were in contact, and measuring the horizontally applied force in pounds required Just to keep the one film slidin over the other when a 7 lb. weight had been placed on the disc.
Tests on the heat resisting ,cores of 7 mms. diameter lacquered with my improved lacquer showed the lacquer to be very flexible at normal temperatures and to possess ample flexibility at temperatures as low as :35? C., and also after being heated for 100 hours at a temperature of 43.5% to 46.5% and a viscosity of from 100 to 250 centipoises,andtoeachten parts by weight of ethyl cellulose, from 2 to 4 parts by weight of transformer oil, from 2 to 4 parts by weight of petroleum jelly and from 3 to 6 parts by weight of castor oil.
HERBERT STUART N OR'I'I-IWAY.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2402437X | 1944-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2402437A true US2402437A (en) | 1946-06-18 |
Family
ID=10905915
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US567328A Expired - Lifetime US2402437A (en) | 1944-01-22 | 1944-12-08 | Lacquer |
Country Status (1)
Country | Link |
---|---|
US (1) | US2402437A (en) |
-
1944
- 1944-12-08 US US567328A patent/US2402437A/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2531392A (en) | Polyurethan coating compositions | |
ES374166A1 (en) | Self-tightening seal | |
US2402437A (en) | Lacquer | |
GB593240A (en) | Process for the production of film consisting essentially of a tetrafluoroethylene polymer | |
US3155631A (en) | Semi-conductor, containing ethylene/ethyl acrylate copolymer, petroleum wax and carbon black | |
US2333513A (en) | Plastic composition | |
US2389379A (en) | Electrical insulation | |
JPS61133506A (en) | Insulated wire | |
US2343040A (en) | Electrical resistance alloy | |
US2486012A (en) | Compositions of chlorinated terphenyl and cellulose acetatebutyrate for strippable coatings | |
US2289744A (en) | Plasticization of polymerized styrene | |
US2400892A (en) | Plasticized polystyrene-type resins | |
US1882298A (en) | Safety glass | |
Burghoff et al. | The creep characteristics of some copper alloys at elevated temperatures | |
US1918971A (en) | Insulation compound | |
US2096110A (en) | Adhesive | |
US2512878A (en) | Piezoelectric crystal | |
US1771786A (en) | Composition and method and steps for making and using the same | |
Jackson et al. | The development of polythene as a high-frequency dielectric | |
US2375624A (en) | Halogenated composition | |
CN106084328A (en) | Moisture-proof high-low temperature resistant rubber and pad | |
US2329583A (en) | Resinous composition for wire coatings and the like | |
GB568125A (en) | An improved dielectric material and electric cable | |
US1765000A (en) | Coating for flame-retarding coverings and method of manufacturing the same | |
US2411284A (en) | Nondeteriorating rubber insulated wire |