CA2038665A1 - Rubber products having a finishing coating film - Google Patents
Rubber products having a finishing coating filmInfo
- Publication number
- CA2038665A1 CA2038665A1 CA002038665A CA2038665A CA2038665A1 CA 2038665 A1 CA2038665 A1 CA 2038665A1 CA 002038665 A CA002038665 A CA 002038665A CA 2038665 A CA2038665 A CA 2038665A CA 2038665 A1 CA2038665 A1 CA 2038665A1
- Authority
- CA
- Canada
- Prior art keywords
- coating film
- ultraviolet
- substrate
- silicone coating
- rubber
- 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
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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/16—Ethene-propene or ethene-propene-diene copolymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
Abstract
ABSTRACT
The present invention relates to rubber products which comprises a substrate made of an ethylene propylene rubber and a finishing coating film formed of a silicone coating that protects the substrate from ultraviolet light deterioration on at least part of the substrates. The silicone coating material contains an ultraviolet-screening pigment in an amount sufficient to suppress the deterioration of the substrate by ultra-violet light.
The present invention relates to rubber products which comprises a substrate made of an ethylene propylene rubber and a finishing coating film formed of a silicone coating that protects the substrate from ultraviolet light deterioration on at least part of the substrates. The silicone coating material contains an ultraviolet-screening pigment in an amount sufficient to suppress the deterioration of the substrate by ultra-violet light.
Description
3 ! f ~ ' The present invention relates to rubber products having a finishing coating film formed of a silicone coating material which protects the substrate from ultraviolet light. In particular, the present invention relates to ethylene propylene rubber substrate having a finishing coating film on parts the substrate that protects the substrate ~rom ultraviolet light.
RELATED ART STATEMENT AND OBJECT OF THE INVENTION
Current rubber products are examplified in Figure 2 by a window frame. In a body of window frame rubber 6 obtained by connecting straight parts (extruded parts) 1 to corner parts (molded parts) 3 and 4 forming a ring, a finishing coating film of a silicone coating material (hereinafter referred to as "silicone coating film") 8 is formed in some cases on the surface of the window frame rubber 6 to be decorated D, mainly for putting the join line out of sight.
However, when the above window frame rubber is attached to a vehicle and exposed to sunlight, the silicone coating film peels, in some cases, from the rubber substrate made of ethylene-propylene-diene ter-polymèrs (EPDM) so that the surface appearance is injured.
There has never been a rubber product obtained ~i~PJ'i`,;;~
1 using a silicone coating material containing an ultraviolet-screening pigment which prevents this peeling.
In view of such conditions, the present inven-tion is intended to provide a rubber product having afinishing coating film which is a silicone coating film hardly peelable from the rubber substrate made of EPDM.
SUMMARY OF THE INVENTION
In order to solve the problems described above, the present inventors devoted themselves to the study of same, and consequently found that substrate peeling is caused by ultraviolet light which is transmitted by a silicone coating film and attacks the surface of the EPDM substrate. This causes the deterioration of the surface of the substrate. On the basis of such findings, the present inver~tors has developed a rubber product having a finishing coating layer which protects the substrate from the ultraviolet light.
The rubber products of the present invention have a finishing coating film formed of a silicone coating material which is directly on desired parts of an ethylene propylene rubber substrate. The silicone coating material used in the present invention contains an ultraviolet screening pigment in an amount sufficient to suppress the deterioration of the substrate caused by ultraviolet light exposure.
In one embodiment, the present invention J
1 relates to a rubber product which comprises a substrate made of an ethylene propylene rubber and a finishing coating film formed of a silicone coating film on at least part of the substrate, wherein the silicone coating material contains an ultraviolet-screening pigment in an amount sufficient to suppress the deterioration of the substrate by ultraviolet light.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a cross-sectional view (along the I-I line in E'ig. 2) of a weather strip which is one example of the rubber product having a finishing coating film of the present invention.
6 --- body of window frame rubber, 8 --- finishing coating film, Figs. 2A and B are plane views of a weather strip to which the present invention is applied, before (A) and after (B), respectively, forming a finishing coating film.
1 --- extruded part (a straight part~, 3, 4 --- molded part (a corner part), Q --- joint between the extruded part and the molded part.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The present invention relates to rubber products having a substrate made of an ethylene propylene rubber (herein, exemplified by EPDM) to which a finishing 1 coating film is applied, preferably to desired parts.
The finishing coating film prevents the deterioration of the substrate from exposure to ultraviolet light.
The rubber products of present inven~ion are exceptionally suitable for use in situations in which the products are required to have a high degree of decorative design and to retain their appearance, for example, weather strips of automobiles.
Rubber products of the present invention include, but are not limited to, weather strips such as, door weather strips and roof side weather strips, glass runs and window frame rubbers.
The finishing coating film is used to, for example, improve the appearance, the qual ty, the abrasion resistance and reduce the slide resistance of window glass or the like.
In the following description, all blending amounts are expressed in terms of parts by weight unless otherwise specified.
The structure of the rubber products of the present invention is exemplified in Figure 1. The products comprise a substrate 6 made of EPDM and a finishing coating film 8 formed of a silicone coating material on desired parts of the substrate D. As the ethylene propylene rubber, ethylene-~-olefin-non-conjugated diene ternary copolymers can be used. Further, although sulfur-vulcanizable EPDM is usually used, EPM, an ethylene-~-olefin copolymer may also be used. An ~ ~ 'J ~J ~
1 example recipe for EPDM compounded rubber is shown below in Table 1.
As the silicone coating material used in the present invention, there can be used conventional ones which are prepared by combining the ingredients exemplified below as base materials, catalysts and the like. An example recipe for the silicone coating material is shown below in Table 2.
Example base materials for the silicone coating material include mixed polysiloxanes of a diorganopoly-siloxane both terminal hydroxyl groups o~ which are blocked and an organohydrodienesiloxane [the organic groups of which include alkyl groups, alkenyl groups, aryl groups, aralkyl groups, etc.).
The silicone coating material may include catalysts, such as, organotin compounds, platinum, platinum compounds, etc.
Silane coupling agents for use in the silicone coating material include, for example, y-glycidoxypropyl-trimethoxysilane, y-glycidoxypropylmethyldimethoxysilane, y-aminopropyltrimethoxysilane, y-aminopropyltriethoxy-silane, y-mercaptopropyltrimethoxysilane, y-chloropropyltrimethoxysilane, y-chloropropylmethyl-dichlorosilane, y-chloropropylmethyldimethoxysilane, etc.
Suitable solvents i.nclude n hexane, n-heptane, toluene, isopropanol, butanol, methanol, ethanol, l,l,l-trilchloroethane, trichloroethylene, etc.
~ ~ ' ` ' ~, 1 Further, in addition to the silicone coating materials exemplified above, the silicone coating material exemplified in Japanese Patent Publication No 56-19813 can be used.
Such coating materials are applied to the substrate by a conventional method such as spray coating, roll coating, dip coating, coating with a brush, or the like. The coating thickness is usually 1 to 30 ~m. The curing conditions of the coating film are usually 80 -150C x 5 - 20 min.
The present invention has a characteristic constitution in which the silicone coating material contains an ultraviolet-screening pigment in an amount sufficient to suppress the deteriGration of the substrate by ultraviolet light.
As the ultraviolet-screening pigment, any one may be used so long as its presence in the silicone coating film can screen the EPDM substrate from the ultraviolet light in sunlight. In detail, suitable ultraviolet screening pigments include carbon black, graphite, iro~ oxide powder, etc. Of these carbon blacks acetylene black, channel black, oil furnace black, gas furnace black and thermal black are preferable.
Channel black is more preferable.
The amount of the ultraviolet-screening pigment incorporated into the silicone coating material is adjusted so that the transmittance of ultraviolet light ~wavelength: 2~0 to 400 nm) may be 5% or less when 1 thickness of the silicone coating film is 5 ~m.
Preferably, when carbon black is used, its amount is 5 to 18 parts per 100 parts of the base material for the silicone coating material. When it is less than 5 parts, sufficient ultraviolet-screening effect can not be obtained. When it exceeds 18 parts, initial color fading is serious ~see Table 3). There-fore, less than 5 parts and more than 18 parts are not desirable.
The rubber product having a finishing coating film of the present invention has a constitution charac-terized in that the rubber product is made of a EPDM
substrate and the finishing coating film formed of a s licone coating material containing an ultraviolet-screening pigment in an amount sufficient to suppress the deterioration of the substrate by ultraviolet light.
The finishing coating film can be applied directly on desired part~ of the substrate. Accordingly, the following action and effect can be obtained.
By virtue of the presence of the ultraviolet-screening pigment in the silicone coating film, even when the rubber product is exposed to sunlight, ultraviolet light hardly reaches the rubber substrate made of EPDM. Therefore, in the rubber product having a finishing coating film of the present invention, the surace of the EPDM ~ubstrate is not attacked by ultraviolet light and deteriorated, and the silicone coating film hardly peels from the rubber substrate.
RELATED ART STATEMENT AND OBJECT OF THE INVENTION
Current rubber products are examplified in Figure 2 by a window frame. In a body of window frame rubber 6 obtained by connecting straight parts (extruded parts) 1 to corner parts (molded parts) 3 and 4 forming a ring, a finishing coating film of a silicone coating material (hereinafter referred to as "silicone coating film") 8 is formed in some cases on the surface of the window frame rubber 6 to be decorated D, mainly for putting the join line out of sight.
However, when the above window frame rubber is attached to a vehicle and exposed to sunlight, the silicone coating film peels, in some cases, from the rubber substrate made of ethylene-propylene-diene ter-polymèrs (EPDM) so that the surface appearance is injured.
There has never been a rubber product obtained ~i~PJ'i`,;;~
1 using a silicone coating material containing an ultraviolet-screening pigment which prevents this peeling.
In view of such conditions, the present inven-tion is intended to provide a rubber product having afinishing coating film which is a silicone coating film hardly peelable from the rubber substrate made of EPDM.
SUMMARY OF THE INVENTION
In order to solve the problems described above, the present inventors devoted themselves to the study of same, and consequently found that substrate peeling is caused by ultraviolet light which is transmitted by a silicone coating film and attacks the surface of the EPDM substrate. This causes the deterioration of the surface of the substrate. On the basis of such findings, the present inver~tors has developed a rubber product having a finishing coating layer which protects the substrate from the ultraviolet light.
The rubber products of the present invention have a finishing coating film formed of a silicone coating material which is directly on desired parts of an ethylene propylene rubber substrate. The silicone coating material used in the present invention contains an ultraviolet screening pigment in an amount sufficient to suppress the deterioration of the substrate caused by ultraviolet light exposure.
In one embodiment, the present invention J
1 relates to a rubber product which comprises a substrate made of an ethylene propylene rubber and a finishing coating film formed of a silicone coating film on at least part of the substrate, wherein the silicone coating material contains an ultraviolet-screening pigment in an amount sufficient to suppress the deterioration of the substrate by ultraviolet light.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a cross-sectional view (along the I-I line in E'ig. 2) of a weather strip which is one example of the rubber product having a finishing coating film of the present invention.
6 --- body of window frame rubber, 8 --- finishing coating film, Figs. 2A and B are plane views of a weather strip to which the present invention is applied, before (A) and after (B), respectively, forming a finishing coating film.
1 --- extruded part (a straight part~, 3, 4 --- molded part (a corner part), Q --- joint between the extruded part and the molded part.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The present invention relates to rubber products having a substrate made of an ethylene propylene rubber (herein, exemplified by EPDM) to which a finishing 1 coating film is applied, preferably to desired parts.
The finishing coating film prevents the deterioration of the substrate from exposure to ultraviolet light.
The rubber products of present inven~ion are exceptionally suitable for use in situations in which the products are required to have a high degree of decorative design and to retain their appearance, for example, weather strips of automobiles.
Rubber products of the present invention include, but are not limited to, weather strips such as, door weather strips and roof side weather strips, glass runs and window frame rubbers.
The finishing coating film is used to, for example, improve the appearance, the qual ty, the abrasion resistance and reduce the slide resistance of window glass or the like.
In the following description, all blending amounts are expressed in terms of parts by weight unless otherwise specified.
The structure of the rubber products of the present invention is exemplified in Figure 1. The products comprise a substrate 6 made of EPDM and a finishing coating film 8 formed of a silicone coating material on desired parts of the substrate D. As the ethylene propylene rubber, ethylene-~-olefin-non-conjugated diene ternary copolymers can be used. Further, although sulfur-vulcanizable EPDM is usually used, EPM, an ethylene-~-olefin copolymer may also be used. An ~ ~ 'J ~J ~
1 example recipe for EPDM compounded rubber is shown below in Table 1.
As the silicone coating material used in the present invention, there can be used conventional ones which are prepared by combining the ingredients exemplified below as base materials, catalysts and the like. An example recipe for the silicone coating material is shown below in Table 2.
Example base materials for the silicone coating material include mixed polysiloxanes of a diorganopoly-siloxane both terminal hydroxyl groups o~ which are blocked and an organohydrodienesiloxane [the organic groups of which include alkyl groups, alkenyl groups, aryl groups, aralkyl groups, etc.).
The silicone coating material may include catalysts, such as, organotin compounds, platinum, platinum compounds, etc.
Silane coupling agents for use in the silicone coating material include, for example, y-glycidoxypropyl-trimethoxysilane, y-glycidoxypropylmethyldimethoxysilane, y-aminopropyltrimethoxysilane, y-aminopropyltriethoxy-silane, y-mercaptopropyltrimethoxysilane, y-chloropropyltrimethoxysilane, y-chloropropylmethyl-dichlorosilane, y-chloropropylmethyldimethoxysilane, etc.
Suitable solvents i.nclude n hexane, n-heptane, toluene, isopropanol, butanol, methanol, ethanol, l,l,l-trilchloroethane, trichloroethylene, etc.
~ ~ ' ` ' ~, 1 Further, in addition to the silicone coating materials exemplified above, the silicone coating material exemplified in Japanese Patent Publication No 56-19813 can be used.
Such coating materials are applied to the substrate by a conventional method such as spray coating, roll coating, dip coating, coating with a brush, or the like. The coating thickness is usually 1 to 30 ~m. The curing conditions of the coating film are usually 80 -150C x 5 - 20 min.
The present invention has a characteristic constitution in which the silicone coating material contains an ultraviolet-screening pigment in an amount sufficient to suppress the deteriGration of the substrate by ultraviolet light.
As the ultraviolet-screening pigment, any one may be used so long as its presence in the silicone coating film can screen the EPDM substrate from the ultraviolet light in sunlight. In detail, suitable ultraviolet screening pigments include carbon black, graphite, iro~ oxide powder, etc. Of these carbon blacks acetylene black, channel black, oil furnace black, gas furnace black and thermal black are preferable.
Channel black is more preferable.
The amount of the ultraviolet-screening pigment incorporated into the silicone coating material is adjusted so that the transmittance of ultraviolet light ~wavelength: 2~0 to 400 nm) may be 5% or less when 1 thickness of the silicone coating film is 5 ~m.
Preferably, when carbon black is used, its amount is 5 to 18 parts per 100 parts of the base material for the silicone coating material. When it is less than 5 parts, sufficient ultraviolet-screening effect can not be obtained. When it exceeds 18 parts, initial color fading is serious ~see Table 3). There-fore, less than 5 parts and more than 18 parts are not desirable.
The rubber product having a finishing coating film of the present invention has a constitution charac-terized in that the rubber product is made of a EPDM
substrate and the finishing coating film formed of a s licone coating material containing an ultraviolet-screening pigment in an amount sufficient to suppress the deterioration of the substrate by ultraviolet light.
The finishing coating film can be applied directly on desired part~ of the substrate. Accordingly, the following action and effect can be obtained.
By virtue of the presence of the ultraviolet-screening pigment in the silicone coating film, even when the rubber product is exposed to sunlight, ultraviolet light hardly reaches the rubber substrate made of EPDM. Therefore, in the rubber product having a finishing coating film of the present invention, the surace of the EPDM ~ubstrate is not attacked by ultraviolet light and deteriorated, and the silicone coating film hardly peels from the rubber substrate.
2 ~ S ~ "g There are explained below examples and comparative examples carried out for confirming the effect of the present invention.
A rubber composition prepared according to the recipe shown in Table 1 was sheeted to obtain a rubbex sheet (2 mmt). EPDM used in the recipe was JSR-EP 57C
(Japan Synthetic Rubber Co., LTD) which has a propylene content of 28 wt%, a Mooney viscosity ML (1~4) 90 (100C), 60 (125C) and ENB as a third component. The rubber sheet was subjected to vulcanization and molding under conditions of 170C X 10 min, and the vulcanized sheet was allowed to stand for 24 hours. Then, a silicone coating material prepared according to the recipe shown in Table 2, by blending channel black in each amount shown in Table 3, was coated on the vulcani~ed sheet to a thickness of 5 ~m and cured under condiiions of 90C X 10 min, whereby test pieces were prepared for the tests described below (excepting the measurement of ultraviolet transmittance).
After standing for 24 hours, the test pieces thus prepared were subjected to the tests described below. The tast results are shown in Table 3. In Examples in which a coating material having an ultraviolet transmittance of 5~ or less was coated to a thickness of 5 ~m, there was no failure after 1000 hours of the weather resistance test described below. In Comparative Example 4, in which an ultraviolet absorber was blended in place of channel black, little preventive effect on peeling of a coating film could be obtained.
2~ ~? ?J ',~
1 (1) Ultraviolet transmittance of a silicone coating film A silicone coating material prepared by blending channel black in each amount shown in Table 3 was coated on quartz glass to a thickness of 5 ~m and cured under the same condition as described above. The ultraviolet transmittance (~) of the coating was measured by means of spectrophotometer (wavelength varying rate:
300 nm/min), and the average ultraviolet transmittance was calculated in the range of 280 to 400 nm.
(2) Test of resistance to peeling of a coating film after the weather resistance test.
The weather resistance test was carried out by means of sunshine weatherometer under the following conditions:
1~ Carbon-arc lamp --- a single lamp, 2) Black panel temperature --- 63 + 2C,
A rubber composition prepared according to the recipe shown in Table 1 was sheeted to obtain a rubbex sheet (2 mmt). EPDM used in the recipe was JSR-EP 57C
(Japan Synthetic Rubber Co., LTD) which has a propylene content of 28 wt%, a Mooney viscosity ML (1~4) 90 (100C), 60 (125C) and ENB as a third component. The rubber sheet was subjected to vulcanization and molding under conditions of 170C X 10 min, and the vulcanized sheet was allowed to stand for 24 hours. Then, a silicone coating material prepared according to the recipe shown in Table 2, by blending channel black in each amount shown in Table 3, was coated on the vulcani~ed sheet to a thickness of 5 ~m and cured under condiiions of 90C X 10 min, whereby test pieces were prepared for the tests described below (excepting the measurement of ultraviolet transmittance).
After standing for 24 hours, the test pieces thus prepared were subjected to the tests described below. The tast results are shown in Table 3. In Examples in which a coating material having an ultraviolet transmittance of 5~ or less was coated to a thickness of 5 ~m, there was no failure after 1000 hours of the weather resistance test described below. In Comparative Example 4, in which an ultraviolet absorber was blended in place of channel black, little preventive effect on peeling of a coating film could be obtained.
2~ ~? ?J ',~
1 (1) Ultraviolet transmittance of a silicone coating film A silicone coating material prepared by blending channel black in each amount shown in Table 3 was coated on quartz glass to a thickness of 5 ~m and cured under the same condition as described above. The ultraviolet transmittance (~) of the coating was measured by means of spectrophotometer (wavelength varying rate:
300 nm/min), and the average ultraviolet transmittance was calculated in the range of 280 to 400 nm.
(2) Test of resistance to peeling of a coating film after the weather resistance test.
The weather resistance test was carried out by means of sunshine weatherometer under the following conditions:
1~ Carbon-arc lamp --- a single lamp, 2) Black panel temperature --- 63 + 2C,
3) Water was sprayed for 12 minutes during irradiation for 60 minutes.
Test pieces subjected to the weather resistance test were taken out of the weatherometer at intervals of 50 hours, set in an abrasion tester, and subjected to an abrasion resistance test under the conditions described below. Whethex the coating film of each test piece has been peeled or not was visually judged.
1) Abrading cloth --- white cotton cloth (JIS-L-0803), 2) Stroke --- 150 mm, 3) Cycle --- 60 times~min,
Test pieces subjected to the weather resistance test were taken out of the weatherometer at intervals of 50 hours, set in an abrasion tester, and subjected to an abrasion resistance test under the conditions described below. Whethex the coating film of each test piece has been peeled or not was visually judged.
1) Abrading cloth --- white cotton cloth (JIS-L-0803), 2) Stroke --- 150 mm, 3) Cycle --- 60 times~min,
4) Load --- 500 gf,
5) The number of times --- 500 repetitions of reciprocation.
(3) Initial color fading test.
White cotton cloth (JIS-L-0803) was pressed against each test piece at a load of 200 gram force (gf~
and reciprocated l00 times, and whether the cloth had been colored or not was visually judged.
In Table 3~ OK denotes "uncolored" and NC
"colored".
* * * * * *
While the foregoing invention has been described in some detail for purposes of clarity and understanding, it will be appreciated by one skilled in the art from a reading of this disclosure that various changes in form and detail can be made without departing from the scope of the invention.
Table l blending amounts: parts E P D M (J S R E P 57C) l00 MAF carbon ~lack 130 Paraffinic process oil l00 Stearic acid Zinc oxide 5 Dehydra~ing agent (CaO) 5 Vulcanization accelerator 3.5 Sulfur 2 ~ Ji~
Table 2 blending amounts: parts Dimethylpolysiloxane both terminal hydroxyl groups of which are blocked Base 100 Material (M = 1 0 0 0 0) Methylhydrodiene-L_ polysiloxaAe ~
Catalyst: dibutyltin laurate 20 .
Silane coupling agent; 25 y-aminopropyltriethoxysilane Ultraviolet-screening pigment; Varied channel black Solvent Isopropanol/ 2 0 0 0 o~ ~
~ ~ ~p ~
0 ~r~ ~ ~ o ,~ a) x x s~ ~ ~ ~ l~ ~ ~ o o a) ~ In h a~ u~ P~
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~ ~ Q~
h ~ ,S::
e ~ ~ ~ r~ ~o z o o . O ~wo ~ O Z~ ~'1 ~
aJ h ~ ~ d~ .'1~0 O
In , 0 ~0 ~1 O Z;~ 1 ~ ~ 5~
a) ~
~o X
,1 .,1 ~ o O
o O ~Wo 1~ ~1 ZWl~r~ _ ~ S~
,~ ~
E~ ~ ~ dP r~ ~ O O
U~ Z ~ C~
~ ~ ~ .~
s~ ~ s~ ~ a ~ ~ ~ ~ r~ Q) X
rl Q~ ~ Lr) ~ ~ O O
I ~ ,~ C~ O W o ~1~ ~7 ~ Q
~ X _ _ C) 0 ~ ~ ~ Q~
C3 r-l(1~ d~ r-l a ~ I_ ~WU~ O
o P~ l ~ O
W .. l Z V ~
U~ ~ ~ ~ g Q) a~ ~1 D7 ~
V V ~ ~ U~ ,1 O Z
. (~ ~ ~:r-l ~ a~ u~ ,~ H ... ..
~1 a) ~ 1 v ~ ~, a) o E~
U~l Q ,~ 1 a) ~1 ~ ~ ) -- O Z
O O ~ O .J:: ~
~ ,1-~ vl ~ ~ o ~ s~ $ ~ ~
~
~ ~ ~ ~ ~rl ~ r~ 1 O ~ ~ t~ u~ fd rl h V ~ V rl td ~3 ~ ~ ~ O w u~ Q ~ o ~ ~
V p ~ n~ V ~ 3 td H t~' .
(3) Initial color fading test.
White cotton cloth (JIS-L-0803) was pressed against each test piece at a load of 200 gram force (gf~
and reciprocated l00 times, and whether the cloth had been colored or not was visually judged.
In Table 3~ OK denotes "uncolored" and NC
"colored".
* * * * * *
While the foregoing invention has been described in some detail for purposes of clarity and understanding, it will be appreciated by one skilled in the art from a reading of this disclosure that various changes in form and detail can be made without departing from the scope of the invention.
Table l blending amounts: parts E P D M (J S R E P 57C) l00 MAF carbon ~lack 130 Paraffinic process oil l00 Stearic acid Zinc oxide 5 Dehydra~ing agent (CaO) 5 Vulcanization accelerator 3.5 Sulfur 2 ~ Ji~
Table 2 blending amounts: parts Dimethylpolysiloxane both terminal hydroxyl groups of which are blocked Base 100 Material (M = 1 0 0 0 0) Methylhydrodiene-L_ polysiloxaAe ~
Catalyst: dibutyltin laurate 20 .
Silane coupling agent; 25 y-aminopropyltriethoxysilane Ultraviolet-screening pigment; Varied channel black Solvent Isopropanol/ 2 0 0 0 o~ ~
~ ~ ~p ~
0 ~r~ ~ ~ o ,~ a) x x s~ ~ ~ ~ l~ ~ ~ o o a) ~ In h a~ u~ P~
o .
~ ~ Q~
h ~ ,S::
e ~ ~ ~ r~ ~o z o o . O ~wo ~ O Z~ ~'1 ~
aJ h ~ ~ d~ .'1~0 O
In , 0 ~0 ~1 O Z;~ 1 ~ ~ 5~
a) ~
~o X
,1 .,1 ~ o O
o O ~Wo 1~ ~1 ZWl~r~ _ ~ S~
,~ ~
E~ ~ ~ dP r~ ~ O O
U~ Z ~ C~
~ ~ ~ .~
s~ ~ s~ ~ a ~ ~ ~ ~ r~ Q) X
rl Q~ ~ Lr) ~ ~ O O
I ~ ,~ C~ O W o ~1~ ~7 ~ Q
~ X _ _ C) 0 ~ ~ ~ Q~
C3 r-l(1~ d~ r-l a ~ I_ ~WU~ O
o P~ l ~ O
W .. l Z V ~
U~ ~ ~ ~ g Q) a~ ~1 D7 ~
V V ~ ~ U~ ,1 O Z
. (~ ~ ~:r-l ~ a~ u~ ,~ H ... ..
~1 a) ~ 1 v ~ ~, a) o E~
U~l Q ,~ 1 a) ~1 ~ ~ ) -- O Z
O O ~ O .J:: ~
~ ,1-~ vl ~ ~ o ~ s~ $ ~ ~
~
~ ~ ~ ~ ~rl ~ r~ 1 O ~ ~ t~ u~ fd rl h V ~ V rl td ~3 ~ ~ ~ O w u~ Q ~ o ~ ~
V p ~ n~ V ~ 3 td H t~' .
Claims (5)
1. A rubber product which comprises a substrate made of an ethylene propylene rubber and a finishing coating film formed of a silicone coating film on at least part of the substrate, said silicone coating material containing an ultraviolet-screening pigment in an amount sufficient to suppress the deterioration of the substrate by ultraviolet light.
2. A rubber product according to claim 1, wherein the amount of the ultraviolet-screening pigment is such that when the thickness of the silicone coating film is 5 µm, the transmittance of ultraviolet light (wavelength: 280 to 400 nm) is 5% or less.
3. A rubber product according to claim 1, wherein the ultraviolet-screening pigment is selected from the group consisting of carbon black, graphite, and iron oxide powder.
4. A rubber product according to claim 2, wherein the ultraviolet-screening pigment is carbon black.
5. A rubber product according claim 1, wherein the ultraviolet-screening pigment is carbon black and the amount thereof is 5 to 18 parts per 100 parts of a base material for the silicone coating material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP02-087137 | 1990-03-31 | ||
| JP2087137A JPH03285926A (en) | 1990-03-31 | 1990-03-31 | Rubber product with topcoating film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2038665A1 true CA2038665A1 (en) | 1991-10-01 |
Family
ID=13906582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002038665A Abandoned CA2038665A1 (en) | 1990-03-31 | 1991-03-20 | Rubber products having a finishing coating film |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH03285926A (en) |
| CA (1) | CA2038665A1 (en) |
| DE (1) | DE4110393C2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU656588B2 (en) * | 1991-06-20 | 1995-02-09 | Chemtura Corporation | Automotive weatherstripping |
| FR2745028B1 (en) * | 1996-02-21 | 1998-05-07 | Daetwyler France | METHOD FOR PRODUCING A SPACER JOINT FOR GLUE GLAZING |
| FR2764032B1 (en) * | 1997-06-02 | 1999-08-20 | Cafac | ELASTOMERIC JOINT REINFORCED WITH CHARGES OF CARBON BLACK AND COATED WITH A PROTECTIVE COATING |
| DE50200054D1 (en) * | 2002-04-17 | 2003-10-30 | Goldschmidt Ag Th | Use of solvent-free, water-free and emulsifier-free organopolysiloxane formulations as lubricants for profiled seals |
-
1990
- 1990-03-31 JP JP2087137A patent/JPH03285926A/en active Pending
-
1991
- 1991-03-20 CA CA002038665A patent/CA2038665A1/en not_active Abandoned
- 1991-03-28 DE DE4110393A patent/DE4110393C2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE4110393C2 (en) | 1995-07-27 |
| JPH03285926A (en) | 1991-12-17 |
| DE4110393A1 (en) | 1991-10-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |