US2463974A - Compositions for the preparation of heat-resistant insulating materials, particularly in the form of independent films - Google Patents
Compositions for the preparation of heat-resistant insulating materials, particularly in the form of independent films Download PDFInfo
- Publication number
- US2463974A US2463974A US580267A US58026745A US2463974A US 2463974 A US2463974 A US 2463974A US 580267 A US580267 A US 580267A US 58026745 A US58026745 A US 58026745A US 2463974 A US2463974 A US 2463974A
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- United States
- Prior art keywords
- films
- ethyl cellulose
- compositions
- resin
- heat
- Prior art date
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- Expired - Lifetime
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- 239000000203 mixture Substances 0.000 title description 39
- 239000011810 insulating material Substances 0.000 title description 7
- 238000002360 preparation method Methods 0.000 title description 2
- 239000001856 Ethyl cellulose Substances 0.000 description 36
- ZZSNKZQZMQGXPY-UHFFFAOYSA-N Ethyl cellulose Chemical compound CCOCC1OC(OC)C(OCC)C(OCC)C1OC1C(O)C(O)C(OC)C(CO)O1 ZZSNKZQZMQGXPY-UHFFFAOYSA-N 0.000 description 36
- 229920001249 ethyl cellulose Polymers 0.000 description 36
- 235000019325 ethyl cellulose Nutrition 0.000 description 35
- 239000011347 resin Substances 0.000 description 17
- 229920005989 resin Polymers 0.000 description 17
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 229920000642 polymer Polymers 0.000 description 12
- 238000009833 condensation Methods 0.000 description 11
- 230000005494 condensation Effects 0.000 description 11
- 239000011521 glass Substances 0.000 description 11
- 239000000047 product Substances 0.000 description 11
- -1 ethyl benzyl Chemical group 0.000 description 9
- 229910052814 silicon oxide Inorganic materials 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 8
- 238000009413 insulation Methods 0.000 description 8
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 7
- 239000007859 condensation product Substances 0.000 description 7
- 230000007062 hydrolysis Effects 0.000 description 7
- 238000006460 hydrolysis reaction Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000003973 paint Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 229920003086 cellulose ether Polymers 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 229910052736 halogen Inorganic materials 0.000 description 4
- 150000002367 halogens Chemical class 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000007605 air drying Methods 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000007654 immersion Methods 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- TWNIBLMWSKIRAT-VFUOTHLCSA-N levoglucosan Chemical group O[C@@H]1[C@@H](O)[C@H](O)[C@H]2CO[C@@H]1O2 TWNIBLMWSKIRAT-VFUOTHLCSA-N 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- FZJCXIDLUFPGPP-UHFFFAOYSA-N propan-2-ol;toluene Chemical compound CC(C)O.CC1=CC=CC=C1 FZJCXIDLUFPGPP-UHFFFAOYSA-N 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- UQRONKZLYKUEMO-UHFFFAOYSA-N 4-methyl-1-(2,4,6-trimethylphenyl)pent-4-en-2-one Chemical group CC(=C)CC(=O)Cc1c(C)cc(C)cc1C UQRONKZLYKUEMO-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 229920001800 Shellac Polymers 0.000 description 1
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 125000003342 alkenyl group Chemical group 0.000 description 1
- 125000005037 alkyl phenyl group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 125000003710 aryl alkyl group Chemical group 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- IRERQBUNZFJFGC-UHFFFAOYSA-L azure blue Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[S-]S[S-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IRERQBUNZFJFGC-UHFFFAOYSA-L 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005394 methallyl group Chemical group 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000010525 oxidative degradation reaction Methods 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 125000000286 phenylethyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])C([H])([H])* 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000004208 shellac Substances 0.000 description 1
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 1
- 229940113147 shellac Drugs 0.000 description 1
- 235000013874 shellac Nutrition 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 125000001712 tetrahydronaphthyl group Chemical group C1(CCCC2=CC=CC=C12)* 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- ZOYFEXPFPVDYIS-UHFFFAOYSA-N trichloro(ethyl)silane Chemical compound CC[Si](Cl)(Cl)Cl ZOYFEXPFPVDYIS-UHFFFAOYSA-N 0.000 description 1
- FXSGDOZPBLGOIN-UHFFFAOYSA-N trihydroxy(methoxy)silane Chemical compound CO[Si](O)(O)O FXSGDOZPBLGOIN-UHFFFAOYSA-N 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L1/00—Compositions of cellulose, modified cellulose or cellulose derivatives
- C08L1/08—Cellulose derivatives
- C08L1/26—Cellulose ethers
- C08L1/28—Alkyl ethers
Definitions
- This invention relates to compositions of matter for use in the production oi coatings, fllms and plastics which are characterized by their ability to withstand elevated temperatures. 'More particularly, it deals with heat resistant insulating materials and methods of making them.
- inorganic spacing materials such as mica sheets, glass fiber cloth and fibrous asbestos.
- the primary object of this invention is to provide a composition of matter capable of yielding fllms coatings and plastics characterized by their resistance to deterioration at elevated temperatures and by their flexibility and toughness at application temperatures.
- Another object of the invention is to provide a thin flexible insulating material which may be used in condensers, capacitors and the like at elevated temperatures.
- a further object is to provide a method of insulating conductors with heat resistant continuous insulation.
- compositions of matter comprising certain organo-silicon oxide condensation polymers and solvent soluble cellulose ethers.
- the organosilicon oxide product is prepared in a stage of condensation at which it is still dispersible in organic solvents.
- a solution of the said silicone is added to a solution of the cellulose ether in a common solvent to yield a clear compatible fllm forming composition.
- fillers or finely divided dielectric solids may be added as the application demands.
- the composition is then applied to a surface and the solvent removed by evaporation to produce coatings or films.
- the composition may be freed of solvent in a mixer oi the Banbury type,
- compositions When such compositions are heated, they soften and become deformable at temperatures from 100 C. to 200 0., depending upon the resin content and its degree of condensation. Each composition has a temperature threshold above which it softens enough to become heat sealable or fiowable under slight pressure. Further heating above this point generally results in conversion of the composition to an infusible, heat resistant state. It is likely that the stabilization of the ethylcellulose by the organo-silicon oxide polymer is due to the fact that the latter enters into combination with the former through some condensation mechanism not fully understood. In any event, the heated compositions are no longer soluble in the same solvents. Further, they are infusible, or at least much higher in their melting point, and are surprisingly more stable at elevated temperatures than would be expected considering their content of products based upon carbon as the essential structural element.
- organo-silicon oxide polymers for use in the film forming compositions of this invention are those which are derived from compounds of the general formula RSiXz, by hydrolysis. It represents any monovalent hydrocarbon radical attached to silicon through carbon-silicon linkage and X represents .a halogen, alkoxyl, or other hydrolyzable group.
- the hydrolysis products of these compounds are capable of condensing in three directions as follows:
- the condensation polymers of this invention include intermediate hydrolysis and condensation products which may still contain appreciable amounts of unhydrolyzed alkoxy'igroups, i. e., up to about one such group per silicon atoms.
- the hydrolyzable group x is halogen. it is necessary to remove all halogen completely to avoid development of free acid on heating the film composition and its consequent embrittling eflects on the cellulose ether.
- the organo-silicon oxide polymers of this invention may also be derived from mixtures of compounds having the general formula asnx: defined above, that is, two or more compounds of this type wherein the hydrocarbon radicals are different. Hydrolysis of such mixtures and condensation of the hydrolysis products result in copolymeric compositions wherein the unit structure n+0 is linked to different unit structures of the formula as-described by James Franklin Hyde in his copending application, Serial No. 432,528. Such copolymeric compositions may be handled and treated for the purposes of this invention in exactly the same way as the polymeric products described above.
- condensation polymers or copolymers of this invention are limited to those which are still soluble enough in aromatic hydrocarbons to give a gel-free viscous solution. Such polymers, on removal of solvent, are capable of condensing further on baking at elevated temperatures to a substantially insoluble and intusible state. I have discovered that such polymers are compatible with ethylcellulose both in solution and when laid down as a free self-supporting film.
- the films so obtained are coherent, flexible and water-impervious and possess desirable electrical properties as well. In general, I prefer to limit the amount of ethyl cellulose employed to about 60% and to use at least about 15%.
- the resulting films are not only flexible but also have a relatively high thermal stability.
- Examples of the monovalent hydrocarbon radicals which are represented by the symbol R in the general formula RSiXa, given above, are as follows: methyl, ethyl, propyl, isopropyl, butyl, isobutyl, amyl, hexyl, heptyl to octadecyl and higher; alicyclic radicals such as cyclopentyl, cyclohexyl, etc., aryl and alkaryl radicals such as phenyl, monoand poly-alkyl phenyls such as tolyl, xylyi, mesityl, mono-, di-, and tri-ethyl phenyls, mono-,.
- di-, and tri-propyl phenyls, etc. naphthyls, monoand poly-alkyl naphthyls, as methyl naphthyl, diethyl naphthyl, tripropyl naphthyl, etc.; tetra-hydro-naphthyl, anthracyl, etc.; aralkyl such as benzyl, phenylethyl, etc.; alkenyl such as methallyl, allyl, etc.
- the above radicals may contain inorganic substituents such as halogens, etc.
- Example 1 A sample of methyltriethoxysilane was hydro lyzed by adding twice the theoretical amount of water (3 moles per mole MeSi(OEt) a) to the ester, at room temperature, using a trace of HCl as catalyst. The product dried to a tack-free state at room temperature. Films, on copper, were brittle and cracked on slight flexing. After as much as a week of air-drying on copper the films would gather and become chalky, when placed in hot water. Baking improved their resistance to.
- Example 2 To 200 g. of methyltriethoxysilane, 60.6 g. of water was added, using a trace of HCl to catalyze the hydrolysis. A part of this was mixed with high viscosity ethyl cellulose, to give a mixture containing per cent by weight of the latter. Aluminum powder was added to give a pigmentvehicle ratio of 1/2 on a weight basis. After thinning with dioxane, the paint was brushed onto iron panels. Films of this paint were intact after 1 /2 hours at 250 C. and protected the metal well. Air-dried films on iron were good after eight months exposure to the weather. With the same pigment-vehicle ratio, but with no ethyl cellulose present, a paint film was soft and had collected a considerable amount of dirt, after five months exposure to the weather.
- Example 3 Methylsilicic acid resin, prepared as given under Example 2, was mixed with high viscosity ethyl cellulose B, to give a mixture containing 25% by weight of the latter. This was mixed with ochre, to give a pigment-vehicle ratio of 1/2. Applied as a paint to iron, it was in good condition after fourteen days exposure to a Hanovia sunlamp. Without the ethyl cellulose, the body of the paint, even at high concentrations of the organo-silicon oxide resin, was too thin to be brushed on satisfactorily. The ethyl cellulose gave an improved body, i'a-ster drying, and better gloss.
- Paints from the methylsiliclc acid resin and ethyl cellulose were also prepared using red lead and ultramarine as pigments.
- Example 4 A solution of 163.5 g. of C2H5SiCl3, in 200 ml. of ether, was added to 618 g. of an ice-water mixture. The solution was washed to neutrality and ether was removed under reduced pressure. The resin obtained had a hydroxyl content of 10.2%.
- a 25% solution of the resin at 70:30 tolueneisopropanol was prepared. Portions of this solu- Medium-ethoxy Ethocel, viscosity 20 Standard-ethoxy Ethocel, viscosity 20 High-ethoxy Ethocel, viscosity 300 Low viscosity-ethyl cellulose B Medium viscosity ethyl cellulose B High viscosity ethyl cellulose B From the solutions or the mixtures, films were cast on microscope slides; these air-dried to thicknesses ranging from 1 to 2 mils. All mixtures air-dried tack-free, to give clear colorless I films, which were suflitiently flexible to be bent over a 2 mm. mandrel. The air-dried films were soluble in toluene. The rates of solution and the extent to which solution occurred was markedly decreased by a ninety minute bake at 150 C.
- Example 5 To 0.83 g. of a 10% solution of medium-ethoxy Ethocel in 70:30 toluene-isopropanol, 1 gram of a solution of the resin of Example 4 was added. This gave a mixture 25% in Ethocel. After thorough mixing, films were cast on glass. The films were tack-free after a 15 minute airdry. By immersing coated glass plates in water for one hour, the films could be separated from the glass base. Films, on glass, heated 90 minutes at 150 C., were strongly adherent and were not removed by a ninety minute immersion in water.
- Example 6 A mixture of the resin of Example 4 and medium viscosity ethyl cellulose B, 75% in the latter, was prepared. The film obtained on air-drying,
- Example 7 A sample of the resin of Example 4 was partially dehydrated by heating a xylene solution to reflux for two days.
- the solvent-free product contained 2.1% OK. It was compatible with all six types of ethyl cellulose, listed in Example 4, in mixtures 25, 50, and 75 per cent in ethyl cellulose. The following are illustrative of the compositions obtained:
- Fflms after baking for one hour at C., were removed from the glass and were found to be sufliciently flexible to be bent over a 2 mm. mandrel, without breaking. A fllm, after such a bake, was intact though swollen, after 48 hours in toluene.
- Example 8 A 50% solution of the resin of Example 8 in The ether solution was washed to neutrality. This treatment reduced the hydroxyl content of the solvent-free resin from 4.9% to 4.3%.
- the resin was compatible with high-ethoxy Ethocel and high viscosity ethyl cellulose B, in mixtures containing 50 and 90 per cent by weight of ethyl cellulose. The mixtures dried tack-free. They retained their shape, when heated as free films, at 160 C. After four hours at this temperature, the films (1-2 mils thick) could be creased without breaking.
- a composition of matter which comprises 40 to 85 per cent by weight of a resinous polymeric organo-silicon oxide condensation product consisting of structural units which correspond substantially to the general formula RsiOa a where R. is a lower alkyl radical and 15 to 80 per cent by weight of ethyl cellulose having from 2.25 to 2.75 ethyl groups per anhydro-glucose unit, said ethyl cellulose being completely soluble in an arcmatic hydrocarbon and said condensation product being sufllciently soluble in an aromatic hydrocarbon to give a gel-free viscous solution.
- composition of matter which comprises 40 to 85 percent by weight of a resinous polymeric organo silicon oxide condensation product consisting of structural units which correspond substantially to the general formula CHaSiOa a and.
- ethyl cellulose having from 2.25 to 2.75 ethyl groups per anhydroglucose unit, said ethyl cellulose being completely soluble-in an aromatic hydrocarbon and said condensation product being sufllciently soluble in an aromatic hydrocarbon to give a gel-free, viscous solution.
- a composition of matter which comprises 40 to 85 percent by weight of a resinous polymeric organo silicon oxide condensation product consisting of structural units which correspond substantially to the general formula CzHeSIOan and 15 to 60 percent by weight of ethyl cellulose having from 2.25 to 2.75 ethyl groups per anhydroglucose unit, said ethyl cellulose being completely soluble in an aromatic hydrocarbon and said condensation product being sufllciently soluble in an aromatic hydrocarbon to give a gel-free viscous solution.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE463303D BE463303A (zh) | 1945-02-28 | ||
| US580267A US2463974A (en) | 1945-02-28 | 1945-02-28 | Compositions for the preparation of heat-resistant insulating materials, particularly in the form of independent films |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US580267A US2463974A (en) | 1945-02-28 | 1945-02-28 | Compositions for the preparation of heat-resistant insulating materials, particularly in the form of independent films |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2463974A true US2463974A (en) | 1949-03-08 |
Family
ID=24320403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US580267A Expired - Lifetime US2463974A (en) | 1945-02-28 | 1945-02-28 | Compositions for the preparation of heat-resistant insulating materials, particularly in the form of independent films |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2463974A (zh) |
| BE (1) | BE463303A (zh) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2620317A (en) * | 1947-10-13 | 1952-12-02 | Corning Glass Works | Organosiloxane films |
| US2654681A (en) * | 1950-01-27 | 1953-10-06 | Minnesota Mining & Mfg | Magnetic recording tape |
| US4361679A (en) * | 1981-06-30 | 1982-11-30 | Ntn Toyo Bearing Co., Ltd. | Process for producing heat-resistant and moisture-resistant polyborometallosiloxanes |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2258218A (en) * | 1939-08-01 | 1941-10-07 | Gen Electric | Methyl silicones and related products |
| US2258220A (en) * | 1940-04-27 | 1941-10-07 | Gen Electric | Resinous materials and insulated conductors and other products utilizing the same |
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0
- BE BE463303D patent/BE463303A/xx unknown
-
1945
- 1945-02-28 US US580267A patent/US2463974A/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2258218A (en) * | 1939-08-01 | 1941-10-07 | Gen Electric | Methyl silicones and related products |
| US2258220A (en) * | 1940-04-27 | 1941-10-07 | Gen Electric | Resinous materials and insulated conductors and other products utilizing the same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2620317A (en) * | 1947-10-13 | 1952-12-02 | Corning Glass Works | Organosiloxane films |
| US2654681A (en) * | 1950-01-27 | 1953-10-06 | Minnesota Mining & Mfg | Magnetic recording tape |
| US4361679A (en) * | 1981-06-30 | 1982-11-30 | Ntn Toyo Bearing Co., Ltd. | Process for producing heat-resistant and moisture-resistant polyborometallosiloxanes |
Also Published As
| Publication number | Publication date |
|---|---|
| BE463303A (zh) |
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