CH624690A5 - Process for the manufacture of moulded products made of glass fibre-reinforced resin - Google Patents

Process for the manufacture of moulded products made of glass fibre-reinforced resin Download PDF

Info

Publication number: CH624690A5
Authority: CH; Switzerland
Prior art keywords: weight; resin; monomer; resin syrup; syrup
Prior art date: 1976-09-22

Application number

CH1159477A

Other languages

English (en)

French (fr)

Inventor

Osamu Yamamoto

Yoshiki Matsumoto

Hiromi Yamada

Keishin Takehara

Original Assignee

Nitto Boseki Co Ltd

Priority date (The priority date 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 date listed.)

1976-09-22

Filing date

1977-09-22

Publication date

1981-08-14

1977-09-22 Application filed by Nitto Boseki Co Ltd filed Critical Nitto Boseki Co Ltd

1981-08-14 Publication of CH624690A5 publication Critical patent/CH624690A5/fr

Links

239000011347 resin Substances 0.000 title claims description 102
229920005989 resin Polymers 0.000 title claims description 102
238000000034 method Methods 0.000 title claims description 37
238000004519 manufacturing process Methods 0.000 title claims description 7
239000011521 glass Substances 0.000 title description 8
239000006188 syrup Substances 0.000 claims description 73
235000020357 syrup Nutrition 0.000 claims description 73
PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 50
239000000178 monomer Substances 0.000 claims description 38
NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 36
239000003365 glass fiber Substances 0.000 claims description 34
VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical group COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 24
229920002554 vinyl polymer Polymers 0.000 claims description 24
229920001577 copolymer Polymers 0.000 claims description 23
239000000203 mixture Substances 0.000 claims description 22
SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 17
NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 17
-1 vinyl aromatic hydrocarbon Chemical class 0.000 claims description 17
CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 16
150000002148 esters Chemical class 0.000 claims description 16
239000012986 chain transfer agent Substances 0.000 claims description 10
STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Substances CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 claims description 5
MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 4
XFCMNSHQOZQILR-UHFFFAOYSA-N 2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOC(=O)C(C)=C XFCMNSHQOZQILR-UHFFFAOYSA-N 0.000 claims description 4
KUDUQBURMYMBIJ-UHFFFAOYSA-N 2-prop-2-enoyloxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC(=O)C=C KUDUQBURMYMBIJ-UHFFFAOYSA-N 0.000 claims description 4
238000002360 preparation method Methods 0.000 claims description 4
OKKRPWIIYQTPQF-UHFFFAOYSA-N Trimethylolpropane trimethacrylate Chemical compound CC(=C)C(=O)OCC(CC)(COC(=O)C(C)=C)COC(=O)C(C)=C OKKRPWIIYQTPQF-UHFFFAOYSA-N 0.000 claims description 3
KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 claims description 2
VDYWHVQKENANGY-UHFFFAOYSA-N 1,3-Butyleneglycol dimethacrylate Chemical compound CC(=C)C(=O)OC(C)CCOC(=O)C(C)=C VDYWHVQKENANGY-UHFFFAOYSA-N 0.000 claims description 2
WAEOXIOXMKNFLQ-UHFFFAOYSA-N 1-methyl-4-prop-2-enylbenzene Chemical group CC1=CC=C(CC=C)C=C1 WAEOXIOXMKNFLQ-UHFFFAOYSA-N 0.000 claims description 2
BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 claims description 2
DBCAQXHNJOFNGC-UHFFFAOYSA-N 4-bromo-1,1,1-trifluorobutane Chemical compound FC(F)(F)CCCBr DBCAQXHNJOFNGC-UHFFFAOYSA-N 0.000 claims description 2
LCXXNKZQVOXMEH-UHFFFAOYSA-N Tetrahydrofurfuryl methacrylate Chemical compound CC(=C)C(=O)OCC1CCCO1 LCXXNKZQVOXMEH-UHFFFAOYSA-N 0.000 claims description 2
HSZUHSXXAOWGQY-UHFFFAOYSA-N [2-methyl-3-prop-2-enoyloxy-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(C)(COC(=O)C=C)COC(=O)C=C HSZUHSXXAOWGQY-UHFFFAOYSA-N 0.000 claims description 2
XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 claims description 2
VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 2
229910052739 hydrogen Inorganic materials 0.000 claims description 2
239000001257 hydrogen Substances 0.000 claims description 2
HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 claims description 2
UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
150000003464 sulfur compounds Chemical class 0.000 claims 1
239000000047 product Substances 0.000 description 40
229920000642 polymer Polymers 0.000 description 12
OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 description 11
238000012360 testing method Methods 0.000 description 11
OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 10
230000000052 comparative effect Effects 0.000 description 10
238000006116 polymerization reaction Methods 0.000 description 9
WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 6
238000006243 chemical reaction Methods 0.000 description 5
238000005470 impregnation Methods 0.000 description 5
239000003505 polymerization initiator Substances 0.000 description 5
230000005540 biological transmission Effects 0.000 description 4
239000003431 cross linking reagent Substances 0.000 description 4
229920003023 plastic Polymers 0.000 description 4
239000004033 plastic Substances 0.000 description 4
239000002904 solvent Substances 0.000 description 4
UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 3
OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
238000010411 cooking Methods 0.000 description 3
PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 3
239000000126 substance Substances 0.000 description 3
RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 description 3
239000004342 Benzoyl peroxide Substances 0.000 description 2
OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
238000005452 bending Methods 0.000 description 2
235000019400 benzoyl peroxide Nutrition 0.000 description 2
230000015572 biosynthetic process Effects 0.000 description 2
WQAQPCDUOCURKW-UHFFFAOYSA-N butanethiol Chemical compound CCCCS WQAQPCDUOCURKW-UHFFFAOYSA-N 0.000 description 2
239000003054 catalyst Substances 0.000 description 2
150000001875 compounds Chemical class 0.000 description 2
238000007796 conventional method Methods 0.000 description 2
238000007334 copolymerization reaction Methods 0.000 description 2
ZQMIGQNCOMNODD-UHFFFAOYSA-N diacetyl peroxide Chemical compound CC(=O)OOC(C)=O ZQMIGQNCOMNODD-UHFFFAOYSA-N 0.000 description 2
238000002845 discoloration Methods 0.000 description 2
BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 2
230000000694 effects Effects 0.000 description 2
239000000835 fiber Substances 0.000 description 2
238000003402 intramolecular cyclocondensation reaction Methods 0.000 description 2
KJRCEJOSASVSRA-UHFFFAOYSA-N propane-2-thiol Chemical compound CC(C)S KJRCEJOSASVSRA-UHFFFAOYSA-N 0.000 description 2
238000004904 shortening Methods 0.000 description 2
125000006850 spacer group Chemical group 0.000 description 2
238000003786 synthesis reaction Methods 0.000 description 2
CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 2
LXUNZSDDXMPKLP-UHFFFAOYSA-N 2-Methylbenzenethiol Chemical compound CC1=CC=CC=C1S LXUNZSDDXMPKLP-UHFFFAOYSA-N 0.000 description 1
RFCQDOVPMUSZMN-UHFFFAOYSA-N 2-Naphthalenethiol Chemical compound C1=CC=CC2=CC(S)=CC=C21 RFCQDOVPMUSZMN-UHFFFAOYSA-N 0.000 description 1
OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 1
GLIPBQWDHKVGNZ-UHFFFAOYSA-N C(C(=C)C)(=O)O.C(C(=C)C)(=O)O.C(C)C(=C(C(=O)O)CC)CC Chemical compound C(C(=C)C)(=O)O.C(C(=C)C)(=O)O.C(C)C(=C(C(=O)O)CC)CC GLIPBQWDHKVGNZ-UHFFFAOYSA-N 0.000 description 1
101710109085 Cysteine synthase, chloroplastic/chromoplastic Proteins 0.000 description 1
235000009037 Panicum miliaceum subsp. ruderale Nutrition 0.000 description 1
NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
230000002411 adverse Effects 0.000 description 1
229910000272 alkali metal oxide Inorganic materials 0.000 description 1
150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
125000003118 aryl group Chemical group 0.000 description 1
244000022185 broomcorn panic Species 0.000 description 1
239000003795 chemical substances by application Substances 0.000 description 1
239000000470 constituent Substances 0.000 description 1
238000004132 cross linking Methods 0.000 description 1
230000007423 decrease Effects 0.000 description 1
230000007547 defect Effects 0.000 description 1
238000004090 dissolution Methods 0.000 description 1
239000011152 fibreglass Substances 0.000 description 1
239000012467 final product Substances 0.000 description 1
238000007496 glass forming Methods 0.000 description 1
125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
239000003999 initiator Substances 0.000 description 1
238000003780 insertion Methods 0.000 description 1
230000037431 insertion Effects 0.000 description 1
239000000463 material Substances 0.000 description 1
230000003340 mental effect Effects 0.000 description 1
125000005397 methacrylic acid ester group Chemical group 0.000 description 1
238000001556 precipitation Methods 0.000 description 1
230000009257 reactivity Effects 0.000 description 1
239000012779 reinforcing material Substances 0.000 description 1
238000000926 separation method Methods 0.000 description 1
238000003756 stirring Methods 0.000 description 1
229910052717 sulfur Inorganic materials 0.000 description 1
239000011593 sulfur Substances 0.000 description 1
238000012546 transfer Methods 0.000 description 1
125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F257/00—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00
- C08F257/02—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 on to polymers of styrene or alkyl-substituted styrenes
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
- C08J5/241—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres
- C08J5/244—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using inorganic fibres using glass fibres
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
- 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
- C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
- C08J2351/06—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond

Landscapes

Chemical & Material Sciences (AREA)
Materials Engineering (AREA)
Engineering & Computer Science (AREA)
Chemical Kinetics & Catalysis (AREA)
Health & Medical Sciences (AREA)
Medicinal Chemistry (AREA)
Polymers & Plastics (AREA)
Organic Chemistry (AREA)
Manufacturing & Machinery (AREA)
Inorganic Chemistry (AREA)
Reinforced Plastic Materials (AREA)
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Compositions Of Macromolecular Compounds (AREA)

CH1159477A 1976-09-22 1977-09-22 Process for the manufacture of moulded products made of glass fibre-reinforced resin CH624690A5 (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
JP11411976A JPS5341368A (en)	1976-09-22	1976-09-22	Method of manufacture of molded resin product of reinforced resin with glass fiber

Publications (1)

Publication Number	Publication Date
CH624690A5 true CH624690A5 (en)	1981-08-14

Family

ID=14629604

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CH1159477A CH624690A5 (en)	1976-09-22	1977-09-22	Process for the manufacture of moulded products made of glass fibre-reinforced resin

Country Status (16)

Country	Link
JP (1)	JPS5341368A (da)
AU (1)	AU512650B2 (da)
BE (1)	BE858914A (da)
BR (1)	BR7706268A (da)
CA (1)	CA1098275A (da)
CH (1)	CH624690A5 (da)
DE (1)	DE2739288C3 (da)
DK (1)	DK417177A (da)
FR (1)	FR2365598A1 (da)
GB (1)	GB1583465A (da)
IT (1)	IT1090463B (da)
MX (1)	MX146668A (da)
NL (1)	NL164073C (da)
NZ (1)	NZ185225A (da)
PH (1)	PH14640A (da)
ZA (1)	ZA774809B (da)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4351884A (en) *	1980-09-02	1982-09-28	Mobil Oil Corporation	Shaped articles from poly(p-methylstyrene) blends
JPS59187046A (ja) *	1984-10-05	1984-10-24	Mitsubishi Monsanto Chem Co	ガラス繊維強化耐熱性樹脂組成物

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1133995A (fr) *	1954-06-29	1957-04-04	Koppers Co Inc	Perfectionnements aux matières de moulage à base de styrène polymérique armées par des fibres de verre et à leurs procédés de fabrication

1976
- 1976-09-22 JP JP11411976A patent/JPS5341368A/ja active Pending
1977
- 1977-08-09 ZA ZA00774809A patent/ZA774809B/xx unknown
- 1977-08-15 AU AU27904/77A patent/AU512650B2/en not_active Expired
- 1977-08-17 PH PH20146A patent/PH14640A/en unknown
- 1977-08-31 DE DE2739288A patent/DE2739288C3/de not_active Expired
- 1977-09-15 CA CA286,785A patent/CA1098275A/en not_active Expired
- 1977-09-20 BR BR7706268A patent/BR7706268A/pt unknown
- 1977-09-21 NZ NZ185225A patent/NZ185225A/xx unknown
- 1977-09-21 MX MX170653A patent/MX146668A/es unknown
- 1977-09-21 GB GB39256/77A patent/GB1583465A/en not_active Expired
- 1977-09-21 BE BE181087A patent/BE858914A/xx not_active IP Right Cessation
- 1977-09-21 IT IT51096/77A patent/IT1090463B/it active
- 1977-09-21 DK DK417177A patent/DK417177A/da not_active Application Discontinuation
- 1977-09-21 NL NL7710335.A patent/NL164073C/xx not_active IP Right Cessation
- 1977-09-22 CH CH1159477A patent/CH624690A5/fr not_active IP Right Cessation
- 1977-09-22 FR FR7728638A patent/FR2365598A1/fr active Granted

Also Published As

Publication number	Publication date
MX146668A (es)	1982-07-26
AU512650B2 (en)	1980-10-23
PH14640A (en)	1981-10-12
JPS5341368A (en)	1978-04-14
GB1583465A (en)	1981-01-28
AU2790477A (en)	1979-02-22
IT1090463B (it)	1985-06-26
BR7706268A (pt)	1978-08-08
NL164073B (nl)	1980-06-16
NL7710335A (nl)	1978-03-28
DE2739288B2 (de)	1980-09-11
DE2739288A1 (de)	1978-03-23
NZ185225A (en)	1979-07-11
ZA774809B (en)	1978-06-28
BE858914A (fr)	1978-03-21
FR2365598B1 (da)	1982-01-15
CA1098275A (en)	1981-03-31
NL164073C (nl)	1980-11-17
FR2365598A1 (fr)	1978-04-21
DK417177A (da)	1978-03-23
DE2739288C3 (de)	1981-07-23

Legal Events

Date	Code	Title	Description
1985-05-31	PL	Patent ceased
2024-10-31	PL	Patent ceased

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