CA1073195A - Light transmissable high density elastic resin composition - Google Patents
Light transmissable high density elastic resin compositionInfo
- Publication number
- CA1073195A CA1073195A CA237,703A CA237703A CA1073195A CA 1073195 A CA1073195 A CA 1073195A CA 237703 A CA237703 A CA 237703A CA 1073195 A CA1073195 A CA 1073195A
- Authority
- CA
- Canada
- Prior art keywords
- parts
- specific gravity
- thermoplastic resin
- resin composition
- high density
- 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
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
- G10K11/165—Particles in a matrix
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/40—Glass
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0016—Plasticisers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/16—Solid spheres
- C08K7/18—Solid spheres inorganic
- C08K7/20—Glass
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Building Environments (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention provides a light transmissible, high density elastic sound barrier composition having a specific gravity of greater than 1.8 which comprises: 100 wt. parts of a thermoplastic resin selected from the group consisting of poly-vinyl chloride, vinyl chloride-vinyl acetate copolymer, poly-vinylidene chloride, polyethylene, polypropylene, polyvinyl acetate, ethylene-vinyl acetate copolymer, polyester and poly-urethane or a mixture of the thermoplastic resin and a plasticizer and 100 to 500 wt. parts of spherical lead glass having an aver-age diameter of 40 to 120 µm and a refractive index ND of 1.5-2.2.
The present invention provides a light transmissible, high density elastic sound barrier composition having a specific gravity of greater than 1.8 which comprises: 100 wt. parts of a thermoplastic resin selected from the group consisting of poly-vinyl chloride, vinyl chloride-vinyl acetate copolymer, poly-vinylidene chloride, polyethylene, polypropylene, polyvinyl acetate, ethylene-vinyl acetate copolymer, polyester and poly-urethane or a mixture of the thermoplastic resin and a plasticizer and 100 to 500 wt. parts of spherical lead glass having an aver-age diameter of 40 to 120 µm and a refractive index ND of 1.5-2.2.
Description
` ~073~1L9S
The present invention relates to a light transmissible high density elastic resin composition which has an excellent sound-barrier effect and sheets formed therefrom. ~ `
Heretofore, it has been usual to use a lead plate or a sheet of a mixture of a thermoplastic resin and a powdery metal having high density such as lead, as a sound-barrier product.
However, such a conventional sound-barrier product is opaque and when used in a room, it is necessary to provide artificial light ~;
even in the daytime.
The present invention provides a resin composition having excellent light transmissibility and sound-barrier effect ~
for both aerial sound waves and solid sound waves. ~ .
I According to the present invention there is provided a ¦ light transmissible, high density elastic sound barrier compo-' sition having a specific gravity of greater than 1.8 which com-J prises: 100 wt. parts of a thermoplastic resin selected from the ~ group consisting of polyvinyl chloride, vinyl chloride-vinyl -~.
acetate copolymer, polyvinylidene chloride, polyethylene, poly- ~ `
propylene, polyvinyl acetate, ethylene-vinyl acetate copolymer, polyester and polyurethane or a mixture of the thermoplastic resin and a plasticizer and 100 to 500 wt. parts of spherical lead glass having an average diameter of 40 to 120 ~m and a refractive index ND of 1.5-2.2.
As used here the term of "light transmissible" include "semi-transmissible" materials and is not limite~ to transparent materials.
The thermoplastic resins used in the invention include polyvinylchloride, a vinyl chloride-vinyl acetate copolymer, ;;
polyvinylidene, chloride, polyethylene, polypropylene, polyvinyl acetate, an ethylene-vinylacetate copolymer, nylon, a polyester and a polyurethane. The degree of polymerization of the thermo-plastic resin is preferably in a range of 1000 - 2500.
- 1- ~ ;
~,.....
-- ~973~
The plasticizers used in the composition of the present invention include dibutylphthalate, dihexyl phthalate, diethyl-hexyl phthalate, dioctyl phthalate, diisooctyl phthalate, butyl-octyl phthalate, dioctyl adipate r diisooctyl adipate, didecyl adipate, diethylhexyl adipate, diethylhexyl azelate diisooctyl azelate, tricresyl phosphate, diethyleneglycol dipelargonate, -and an epoxy type plasticizer.
The plasticizer is added to the resin e.g. polyvinyl chloride to impart softness thereto. The amount of the plastic-izer is preferably in a range of from 50 ~ 150 wt. part per 100 wt. parts of the remaining polyvinyl chlorideO
The amount of the lead glass is suitably in a rangeof from 100 - 500 wt. parts to 100 wt. parts of the thermoplastic resin or a mixture of the thermoplastic resin and the plasticizer, so as to yield the resin composition having a specific gravity ; of higher than 1.8. When the amount of the lead glass is less ; than 100 wt. parts, the specific gravity of the resin composition is too low to provide a sufficient sound-barrier effect. When the amount of the lead glass is greater than 500 wt. par-ts, physical properties such as a tensile strength of the resin com-position are disadvantageously low. It is especially preferable to combine 300 - 400 wt. parts of the lead glass with 100 w~.
parts of the thermoplastic resin or the mixture of the thermo-plastic resin and the plasticizer.
The refractive index of the lead glass is preferably near that of the thermoplastic resin. The difference of refrac-tive index of the lead glass to that of the resin composition is preferably in a range of from 0 - 0.8 ~ND). The refractive index of the thermoplastic resin is usually in a range of from 1.4 - 1.6 (ND). Accordingly, it is desirable to be from 1.5 -
The present invention relates to a light transmissible high density elastic resin composition which has an excellent sound-barrier effect and sheets formed therefrom. ~ `
Heretofore, it has been usual to use a lead plate or a sheet of a mixture of a thermoplastic resin and a powdery metal having high density such as lead, as a sound-barrier product.
However, such a conventional sound-barrier product is opaque and when used in a room, it is necessary to provide artificial light ~;
even in the daytime.
The present invention provides a resin composition having excellent light transmissibility and sound-barrier effect ~
for both aerial sound waves and solid sound waves. ~ .
I According to the present invention there is provided a ¦ light transmissible, high density elastic sound barrier compo-' sition having a specific gravity of greater than 1.8 which com-J prises: 100 wt. parts of a thermoplastic resin selected from the ~ group consisting of polyvinyl chloride, vinyl chloride-vinyl -~.
acetate copolymer, polyvinylidene chloride, polyethylene, poly- ~ `
propylene, polyvinyl acetate, ethylene-vinyl acetate copolymer, polyester and polyurethane or a mixture of the thermoplastic resin and a plasticizer and 100 to 500 wt. parts of spherical lead glass having an average diameter of 40 to 120 ~m and a refractive index ND of 1.5-2.2.
As used here the term of "light transmissible" include "semi-transmissible" materials and is not limite~ to transparent materials.
The thermoplastic resins used in the invention include polyvinylchloride, a vinyl chloride-vinyl acetate copolymer, ;;
polyvinylidene, chloride, polyethylene, polypropylene, polyvinyl acetate, an ethylene-vinylacetate copolymer, nylon, a polyester and a polyurethane. The degree of polymerization of the thermo-plastic resin is preferably in a range of 1000 - 2500.
- 1- ~ ;
~,.....
-- ~973~
The plasticizers used in the composition of the present invention include dibutylphthalate, dihexyl phthalate, diethyl-hexyl phthalate, dioctyl phthalate, diisooctyl phthalate, butyl-octyl phthalate, dioctyl adipate r diisooctyl adipate, didecyl adipate, diethylhexyl adipate, diethylhexyl azelate diisooctyl azelate, tricresyl phosphate, diethyleneglycol dipelargonate, -and an epoxy type plasticizer.
The plasticizer is added to the resin e.g. polyvinyl chloride to impart softness thereto. The amount of the plastic-izer is preferably in a range of from 50 ~ 150 wt. part per 100 wt. parts of the remaining polyvinyl chlorideO
The amount of the lead glass is suitably in a rangeof from 100 - 500 wt. parts to 100 wt. parts of the thermoplastic resin or a mixture of the thermoplastic resin and the plasticizer, so as to yield the resin composition having a specific gravity ; of higher than 1.8. When the amount of the lead glass is less ; than 100 wt. parts, the specific gravity of the resin composition is too low to provide a sufficient sound-barrier effect. When the amount of the lead glass is greater than 500 wt. par-ts, physical properties such as a tensile strength of the resin com-position are disadvantageously low. It is especially preferable to combine 300 - 400 wt. parts of the lead glass with 100 w~.
parts of the thermoplastic resin or the mixture of the thermo-plastic resin and the plasticizer.
The refractive index of the lead glass is preferably near that of the thermoplastic resin. The difference of refrac-tive index of the lead glass to that of the resin composition is preferably in a range of from 0 - 0.8 ~ND). The refractive index of the thermoplastic resin is usually in a range of from 1.4 - 1.6 (ND). Accordingly, it is desirable to be from 1.5 -
2.2 (ND) especially from 1.5 - 1.8 (ND) of the refractive index.
When a glass having super high refractive index, e.g. greater .~ .
1~73~5 than 2.2, is used, the central refractive luminance of the powder glass is too high to aecrease light transmittance.
The lead glass used in the invention is spherical (beads), because the spherical particles of the glass impart a lens effect to increase light transmittance The average dia-meter of the lead glass is in the range 40 -- 120 ~.
When the average diameter of the particles is less than 40 ~l, the light transmittance is reduced because of diffuse reflection. When the average diameter of the particles :LS ' higher than 120 ~, -the physical properties such as tensile strength of the resin composition are reduced. The average ;~
diameter of the powdery glass is thus from 40 - 120 ~. The specific gravity of the lead glass is usually higher than 2.4, ' ' ':
preferably higher than 3.0, so as to increase the density of the resin composition and to impart the sound-barrier effect, ' and it is selected depending upon a ratio of the lead glass.
It is possible to add a transparent pigment, a dye, ' a stabilizer, a lubricant, parting agent, etc. to the resin composltion of the invention, if desirable. It is preferable to select a stabilizer having transparency such as epoxy veget~
able oils, Cd-Ba-Zn type organic composites and organo-tin com-pounds.
A sheet of the resin composition of the invention can be prepared by kneading to disperse the powdery glass by means of an extruder, a hot-kneader or a hot-roller mill and then, pelletizing it and sheeting by means of a calender roller and an extruder. The sheet of the resin composition can be also prepared by means of hot-roller mill to directly form the sheet by kneading to disperse the lead glass and extruding to form the sheet.
-~73~
The resulting sheet may be used as a light transmiss-ible sound-barrier sheet. The sheet made of the resin compos~
ition of the invention preferably has a thickness of 0.4 - 2 mm, and a specific gravity of more than 1.8, a total light transmit-tance of more than 10%, a tensile strength of more than 30 Kg/cm and is useable as a sound-barrier product. It is preferable to reinforce the sheet of the resin composition of the present invention with a split film nonwoven fabric which is prepared by stretching a film of a ~hermoplastic resin such as polyethylene or polypropylene to form split fibers with fine cracks having lengths of 0.1 - 0.3 mm to the stretching direction and lamin-ating the sheets in transverse and longitudinal directions, under hot-melt bonding.
The sheet of the resin composition of the invention can suitably be used as a sound-barrier curtain, accordion type door in a sickroom and a consultation room in a hospital, a lecture room in school, a living room and a workroom of a factory.
The sheet can be also used as a X-ray shield board. The present invention will be further illustrated by the following Examples in which the term of "part" designates "part by weight".
EXAMPLE 1:
lO0 parts of polyvinyl chloride (Degree of polymeriz-ation lO00) was admixed with 30 parts of plasticizer of dioctyl phthalate, 20 parts of dioctyl adipate, a small amount of epoxy vegetable oil (supplied under the trademark Eposizer W-lO0-EL
manufactured by Dainippon Ink Chemical I~abushike Kaisha) and a Cd-Ba-Zn type organic stabilizer.
The mixture was kneaded at 100C for l hour. The mix-ture was mixed with 450 parts of glass beads of specific gravity of 4.8; refrac~ive index of 1.8; and average diameter of 70 and the mixture was kneaded in a continuous kneader at 160C
for about 2 minutes, was extruded through a die opening having ~ 3~9~i ;
a diameter of 3mm and was cut to form pellets. The pellets were kneaded by a mixing roller mill at 160C to extrude it as a sheet having a thickness of 1 mm. The glass beads used were those supplied under the trademark U~3-46J manufactured by Union Glass Co. and will be referred to hereinafter as glass ' beads A.
,.~ ,.
EXAMPLES 2 - 7:
The pr~cess of Example 1 was repeated except using the ~ .
components shown in the following Table 1 to prepare each high ~--density sheet.
The properties of the resulting sheets are shown in Table 1.
, ' ., ~
~ 20 ; 3Q
1~73~.9S ~Z -o o ~ ccZZ ~' ~1 ,' _ . - - '- -1 " ' ' ~ Z o 1~ o ..
t,g O O O U~ O ~Z ~ ~ ~ .
.' _ . - .
o o o .,. o ~ o ~Z o t~ ~.
. ' . O ~ ~ t ~Z1- ~ ~ ' _ ' : ~
Z, : ~ ~.Z . , .
;l d' O o o u~) ~I ~) O O
' _ _ `, ~,Z Oo o ~n cZ ~ , ,~ ~ ,.
: .
.~ _ . _ ''~' O O O1~ 0 ~ (~3 0 Lr,t C~ .: .
~ ~ Z I~ 1 . ' ~
~ _ Lt~ '~"
'~ O ~~ 1 ~ ~Z ~ ~10 Z ~_ ~
~ _ _ ~
~ ~ _ ~ ,_ _ _ ~ ~ :' ,ZZ ~- LtZ ~Z ~C ~ o '' o ~ ~Z ~ m ~ ~ ~ ~ -:
~,tZ O ~ ' ~ ~ ~ ~ ~~ ~ \ o\ ~ O
g~ ~ ~, a 4 P~ a -- 6 -- . ZZ
1(~73~5 ¦ Note:
! *l) UB-24H a -trademark of Union Glass Co. (specific gravity ¦ 4.8; refractive index 2.2; average diameter 50 ~) ! *2) UB-78H a trademark of Union Glass Co. ~specific gravity 4.g; refractive index 2.2; average diameter 110 ~
*3) Amorphous glass (specific gravity 4.0; refractive index 2.0; average diameter 90 ~) .*4) Japanese Industrial Standard K-6911-5.?8 *5) Japanese Industrial Standard K-6723.
*6) ASTM -D-638-68 ' *7) Hitachi 323 (a trademark) type automatic spectrophoto-:~.
~ meter (340 - 700 m~) , " ~
*8) Japanese Industrial Standard C-1502 -; EXAMPLE 8: '~
100 ~arts of an ethylene-vinylacetate copolymer (sup-plied under the trademark EVATATE K-2010 manufactured by Sumitomo ,' Kagaku K.K.) was admixed with 0.5 parts of zinc stearate.
~! The mixture was mixed with 500 parts of Glass beads A
in a continuous kneader at 100 - 110C for a retension time greater than 2 minutes, was extruded through a die opening having a dia-meter of 3mm and was cut to form pellets. The pellets were kneaded in a mixing roller mill at 100 - 110C to extrude it as `
a sheet having a thickness of 1 mm. The sheet had a specific gravity of 2.6; a tensile strength of 37 Kg/cm2; an elongation of 817%; a total light transmission of 14% and a sound wave trans-~3 mission loss (1000 Hz) of 18.
~;3 EXAMPLE 9: f 100 parts of a vinylchloride-ethylene-vinylacetate co- ;
polymer (supplied under the trademark SUMIGRAFT GF: Sumitomo !
Kagaku K.K.) was admixed with 0.5 parts of zinc stearate.
The mixture was mixed with 500 parts of Glass beads A
in a continuous kneader at 90 - 100C for a retension time .;. ~ ,:
, greater than 2 minutes, was extruded through a die opening hav~
ing a diameter of 3 mm and was cut to form pellets. The pellets were kneaded in a mixing roller mill at 90 - 100C to extrude it as a sheet having a ~hickness of 1 mm. The sheet had a specific gravity of 3.0; a tensile s~rength of 32 Kg/cm , an elongation of 307%; a total light transmission of 10% and a sound wave transmission loss (100 Hz) of 20.
.' '', ~, - - - -.. : - ~ . , . . . , ., . ,, . " ..
When a glass having super high refractive index, e.g. greater .~ .
1~73~5 than 2.2, is used, the central refractive luminance of the powder glass is too high to aecrease light transmittance.
The lead glass used in the invention is spherical (beads), because the spherical particles of the glass impart a lens effect to increase light transmittance The average dia-meter of the lead glass is in the range 40 -- 120 ~.
When the average diameter of the particles is less than 40 ~l, the light transmittance is reduced because of diffuse reflection. When the average diameter of the particles :LS ' higher than 120 ~, -the physical properties such as tensile strength of the resin composition are reduced. The average ;~
diameter of the powdery glass is thus from 40 - 120 ~. The specific gravity of the lead glass is usually higher than 2.4, ' ' ':
preferably higher than 3.0, so as to increase the density of the resin composition and to impart the sound-barrier effect, ' and it is selected depending upon a ratio of the lead glass.
It is possible to add a transparent pigment, a dye, ' a stabilizer, a lubricant, parting agent, etc. to the resin composltion of the invention, if desirable. It is preferable to select a stabilizer having transparency such as epoxy veget~
able oils, Cd-Ba-Zn type organic composites and organo-tin com-pounds.
A sheet of the resin composition of the invention can be prepared by kneading to disperse the powdery glass by means of an extruder, a hot-kneader or a hot-roller mill and then, pelletizing it and sheeting by means of a calender roller and an extruder. The sheet of the resin composition can be also prepared by means of hot-roller mill to directly form the sheet by kneading to disperse the lead glass and extruding to form the sheet.
-~73~
The resulting sheet may be used as a light transmiss-ible sound-barrier sheet. The sheet made of the resin compos~
ition of the invention preferably has a thickness of 0.4 - 2 mm, and a specific gravity of more than 1.8, a total light transmit-tance of more than 10%, a tensile strength of more than 30 Kg/cm and is useable as a sound-barrier product. It is preferable to reinforce the sheet of the resin composition of the present invention with a split film nonwoven fabric which is prepared by stretching a film of a ~hermoplastic resin such as polyethylene or polypropylene to form split fibers with fine cracks having lengths of 0.1 - 0.3 mm to the stretching direction and lamin-ating the sheets in transverse and longitudinal directions, under hot-melt bonding.
The sheet of the resin composition of the invention can suitably be used as a sound-barrier curtain, accordion type door in a sickroom and a consultation room in a hospital, a lecture room in school, a living room and a workroom of a factory.
The sheet can be also used as a X-ray shield board. The present invention will be further illustrated by the following Examples in which the term of "part" designates "part by weight".
EXAMPLE 1:
lO0 parts of polyvinyl chloride (Degree of polymeriz-ation lO00) was admixed with 30 parts of plasticizer of dioctyl phthalate, 20 parts of dioctyl adipate, a small amount of epoxy vegetable oil (supplied under the trademark Eposizer W-lO0-EL
manufactured by Dainippon Ink Chemical I~abushike Kaisha) and a Cd-Ba-Zn type organic stabilizer.
The mixture was kneaded at 100C for l hour. The mix-ture was mixed with 450 parts of glass beads of specific gravity of 4.8; refrac~ive index of 1.8; and average diameter of 70 and the mixture was kneaded in a continuous kneader at 160C
for about 2 minutes, was extruded through a die opening having ~ 3~9~i ;
a diameter of 3mm and was cut to form pellets. The pellets were kneaded by a mixing roller mill at 160C to extrude it as a sheet having a thickness of 1 mm. The glass beads used were those supplied under the trademark U~3-46J manufactured by Union Glass Co. and will be referred to hereinafter as glass ' beads A.
,.~ ,.
EXAMPLES 2 - 7:
The pr~cess of Example 1 was repeated except using the ~ .
components shown in the following Table 1 to prepare each high ~--density sheet.
The properties of the resulting sheets are shown in Table 1.
, ' ., ~
~ 20 ; 3Q
1~73~.9S ~Z -o o ~ ccZZ ~' ~1 ,' _ . - - '- -1 " ' ' ~ Z o 1~ o ..
t,g O O O U~ O ~Z ~ ~ ~ .
.' _ . - .
o o o .,. o ~ o ~Z o t~ ~.
. ' . O ~ ~ t ~Z1- ~ ~ ' _ ' : ~
Z, : ~ ~.Z . , .
;l d' O o o u~) ~I ~) O O
' _ _ `, ~,Z Oo o ~n cZ ~ , ,~ ~ ,.
: .
.~ _ . _ ''~' O O O1~ 0 ~ (~3 0 Lr,t C~ .: .
~ ~ Z I~ 1 . ' ~
~ _ Lt~ '~"
'~ O ~~ 1 ~ ~Z ~ ~10 Z ~_ ~
~ _ _ ~
~ ~ _ ~ ,_ _ _ ~ ~ :' ,ZZ ~- LtZ ~Z ~C ~ o '' o ~ ~Z ~ m ~ ~ ~ ~ -:
~,tZ O ~ ' ~ ~ ~ ~ ~~ ~ \ o\ ~ O
g~ ~ ~, a 4 P~ a -- 6 -- . ZZ
1(~73~5 ¦ Note:
! *l) UB-24H a -trademark of Union Glass Co. (specific gravity ¦ 4.8; refractive index 2.2; average diameter 50 ~) ! *2) UB-78H a trademark of Union Glass Co. ~specific gravity 4.g; refractive index 2.2; average diameter 110 ~
*3) Amorphous glass (specific gravity 4.0; refractive index 2.0; average diameter 90 ~) .*4) Japanese Industrial Standard K-6911-5.?8 *5) Japanese Industrial Standard K-6723.
*6) ASTM -D-638-68 ' *7) Hitachi 323 (a trademark) type automatic spectrophoto-:~.
~ meter (340 - 700 m~) , " ~
*8) Japanese Industrial Standard C-1502 -; EXAMPLE 8: '~
100 ~arts of an ethylene-vinylacetate copolymer (sup-plied under the trademark EVATATE K-2010 manufactured by Sumitomo ,' Kagaku K.K.) was admixed with 0.5 parts of zinc stearate.
~! The mixture was mixed with 500 parts of Glass beads A
in a continuous kneader at 100 - 110C for a retension time greater than 2 minutes, was extruded through a die opening having a dia-meter of 3mm and was cut to form pellets. The pellets were kneaded in a mixing roller mill at 100 - 110C to extrude it as `
a sheet having a thickness of 1 mm. The sheet had a specific gravity of 2.6; a tensile strength of 37 Kg/cm2; an elongation of 817%; a total light transmission of 14% and a sound wave trans-~3 mission loss (1000 Hz) of 18.
~;3 EXAMPLE 9: f 100 parts of a vinylchloride-ethylene-vinylacetate co- ;
polymer (supplied under the trademark SUMIGRAFT GF: Sumitomo !
Kagaku K.K.) was admixed with 0.5 parts of zinc stearate.
The mixture was mixed with 500 parts of Glass beads A
in a continuous kneader at 90 - 100C for a retension time .;. ~ ,:
, greater than 2 minutes, was extruded through a die opening hav~
ing a diameter of 3 mm and was cut to form pellets. The pellets were kneaded in a mixing roller mill at 90 - 100C to extrude it as a sheet having a ~hickness of 1 mm. The sheet had a specific gravity of 3.0; a tensile s~rength of 32 Kg/cm , an elongation of 307%; a total light transmission of 10% and a sound wave transmission loss (100 Hz) of 20.
.' '', ~, - - - -.. : - ~ . , . . . , ., . ,, . " ..
Claims (4)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A light transmissible, high density elastic sound barrier composition having a specific gravity of greater than 1.8 which comprises: 100 wt. parts of a thermoplastic resin selected from the group consisting of polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinylidene chloride, poly-ethylene, polypropylene, polyvinyl acetate, ethylene-vinyl acetate copolymer, polyester and polyurethane or a mixture of the thermoplastic resin and a plasticizer and 100 to 500 wt.
parts of spherical lead glass having an average diameter of 40 to 120 µm and a refractive index ND of 1.5-2.2.
parts of spherical lead glass having an average diameter of 40 to 120 µm and a refractive index ND of 1.5-2.2.
2. A composition according to claim 1 wherein the specific gravity of the spherical lead glass is greater than 3Ø
3. A composition according to claim 1 wherein the plasticizer is present in an amount of 50 to 150 wt. parts per 100 wt. parts of the thermo-plastic resin.
4. A composition according to claim 1 or 3 wherein the polymerization degree of the thermoplastic is 1000 - 2500.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2497975A JPS5290545A (en) | 1975-03-03 | 1975-03-03 | Transparent and high-density elastic resin composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1073195A true CA1073195A (en) | 1980-03-11 |
Family
ID=12153084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA237,703A Expired CA1073195A (en) | 1975-03-03 | 1975-10-15 | Light transmissable high density elastic resin composition |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5290545A (en) |
| CA (1) | CA1073195A (en) |
| DE (1) | DE2546200C3 (en) |
| FR (1) | FR2303046A1 (en) |
| GB (1) | GB1474013A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60184561A (en) * | 1984-03-02 | 1985-09-20 | Tsutsunaka Plast Kogyo Kk | Composite material composed of plastic and glass |
| WO2004000945A1 (en) * | 2002-06-20 | 2003-12-31 | Sumitomo Bakelite Co., Ltd. | Transparent composite composition |
| DK200600261A (en) | 2005-11-23 | 2007-05-24 | Petersen Lars Boerthy | Use of powdered glass in a composite material |
| CN113025152B (en) * | 2021-04-25 | 2022-06-07 | 北京市政路桥管理养护集团有限公司 | Anti-cracking hot-melt reflective marking paint |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU466514B2 (en) * | 1972-12-09 | 1975-10-30 | National Research Corporation | Energy absorbing compositions |
-
1975
- 1975-03-03 JP JP2497975A patent/JPS5290545A/en active Pending
- 1975-10-14 FR FR7531352A patent/FR2303046A1/en active Granted
- 1975-10-15 CA CA237,703A patent/CA1073195A/en not_active Expired
- 1975-10-15 GB GB4226675A patent/GB1474013A/en not_active Expired
- 1975-10-15 DE DE2546200A patent/DE2546200C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5290545A (en) | 1977-07-29 |
| DE2546200A1 (en) | 1976-09-16 |
| GB1474013A (en) | 1977-05-18 |
| DE2546200B2 (en) | 1979-06-21 |
| FR2303046A1 (en) | 1976-10-01 |
| DE2546200C3 (en) | 1980-02-14 |
| FR2303046B1 (en) | 1979-02-02 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |