CN1040881C - Cleaning resin composition - Google Patents
Cleaning resin composition Download PDFInfo
- Publication number
- CN1040881C CN1040881C CN89101345A CN89101345A CN1040881C CN 1040881 C CN1040881 C CN 1040881C CN 89101345 A CN89101345 A CN 89101345A CN 89101345 A CN89101345 A CN 89101345A CN 1040881 C CN1040881 C CN 1040881C
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- Prior art keywords
- resin
- composition
- cleaning
- clean
- resin composition
- 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 - Fee Related
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D1/00—Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
- C11D1/02—Anionic compounds
- C11D1/12—Sulfonic acids or sulfuric acid esters; Salts thereof
- C11D1/22—Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
- C11D3/00—Other compounding ingredients of detergent compositions covered in group C11D1/00
- C11D3/16—Organic compounds
- C11D3/37—Polymers
- C11D3/3746—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C11D3/3749—Polyolefins; Halogenated polyolefins; Natural or synthetic rubber; Polyarylolefins or halogenated polyarylolefins
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Detergent Compositions (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
A cleaning resin composition by the use of which it is possible to effect color exchange inside various molding machines by exchanging the composition for the preceding colored resin or to clean the inside of the machines or to effect resin exchange for the preceding resin inside the machines, in a small quantity of the composition, in a simple operation and in a short time is provided, which composition comprises a polyolefin resin such as polyethylene, polypropylene, etc. and a neutral salt of an alkylbenzenesulfonic acid, an inorganic filler and a water-repellent compound blended with the polyolefin resin.
Description
The present invention relates to a kind of cleaning resin composition that is used to clean various mould machines inside.More particularly, the present invention relates to the cleaning resin composition that obtains by following method, that is, with neutral alkylbenzene sulfonate, mineral filler, hydrophobic compound mixes with polyolefin resin.
Recently, the thermoplastic resin molding changes more and more, and along with the increase of product specification, production lot is more and more littler.In addition, because the appearance of materials such as engineering plastics, the temperature range of implementing colour switching or resin conversion in injection moulding machine is very wide, and the frequency of this colour switching or resin conversion also constantly increases.
Up to the present, when carrying out this colour switching or resin conversion,, that is to say, continue to use following method always in order to clean the inside of mould machine in order to remove the dirt that early stage, resin caused in the mould machine:
Extract contaminated screw rod in the mould machine out, then, by scrubbing or so-called manual removal method is removed dirt on the screw rod or on the material tube inner wall, or allow colourless resin (hereinafter referred is for cleaning resin) in barrel, pass, so that under the situation that does not split out screw rod, screw rod is cleaned (hereinafter being referred to as common cleaning) with barrel.
But this method needs could clean screw rod and barrel inside fully for a long time, and with regard to cleaning altogether, resin is cleaned in a large amount of employings will cause very big financial loss.
In order to address these problems, developed following clean-out system, that is, mainly by the clean-out system of forming as the hardened resin of acrylic resin, nonionogenic tenside is mixed the clean-out system that obtains with thermoplastic resin, lubricant (as: stearic acid) is mixed with thermoplastic resin and the clean-out system that obtains.
But, with regard to the previous case, because the melt viscosity height of acrylic resin, to adopt high-load when inner being used to clean mould machine, and the temperature of mould machine must be risen to quite highly, will bring resin to be easy to the pyrolysated shortcoming like this.
In addition, also have following shortcoming: troublesome poeration, and need considerable time, for example, it is folded etc. to remove the die head filter screen of injection moulding machine before using clean-out system.In addition, if after finishing cleaning, clean-out system is still stayed in the mould machine, and residual clean-out system is sneaked in the moulding product of being made by follow-up resin, and this exotic will make the outward appearance of this moulding product or physical properties change as a result.
In addition, with regard to one situation of back, stearic acid or other analogues are mixed the cleaning performance of clean-out system in mould machine that obtains with thermoplastic resin bad.Nonionogenic tenside is mixed the clean-out system that obtains with thermoplastic resin, if its cleaning temperature surpasses 250 ℃, will volatilize a large amount of decomposition gases, and its special odor can bring detrimentally affect to operating environment, in addition, the cleaning performance of this clean-out system is also bad.
In order to obtain having the cleaning resin composition of following characteristics, the present inventor has done deep research, promptly adopt the said composition can be with small quantities of composition, with simple operations, at short notice, the composition of pigmentary resin carries out colour switching in various mould machines by conversion early stage, and the resin in early stage of machine intimate is perhaps changed in perhaps wash machine inside.
We find as a result: with neutral alkylbenzene sulfonate, inorganic filler, hydrophobic compound mix the composition that obtains with polyolefin resin be a kind of cleaning resin composition that can address the above problem, and finished the present invention based on this.
The present invention is characterised in that:
(1) a kind of cleaning resin composition, said composition comprise polyolefin resin and with the neutral alkylbenzene sulfonate of this polyolefin resin blended, talcum powder or lime carbonate inorganic filler and hydrophobic compound; With
In the weight of said composition, said neutral alkylbenzene sulfonate, the ratio of said talcum powder or lime carbonate inorganic filler and said hydrophobic compound is respectively 1 to 20% (weight), 1 to 30% (weight) and 0.5 to 10% (weight);
(2) by above-mentioned (1) described cleaning resin composition, wherein said polyolefin resin is polyethylene or polypropylene; With
(3) according to above-mentioned (1) described cleaning resin composition, said composition is the pellet form of kneading and obtaining by fusion.
The example of the polyolefin resin that is adopted among the present invention comprises polyethylene type resin (as: high density polyethylene(HDPE), LLDPE, new LDPE (film grade) etc.), polyacrylic resin (as: crystalline propylene homopolymer, crystalline polypropylene-ethylene copolymer, crystalline polypropylene-ethene-butene-1 terpolymers or contain the crystalline polypropylene-1-Butylene copolymer of 70% (weight) or more propylene compositions), polybutene-1, noncrystalline ethylene-propylene copolymer (EPR), the mixture of noncrystalline ethylene-propylene-diene terpolymer (EPDM) and aforementioned polymer.Wherein, preferred resin is a high density polyethylene(HDPE), linear low density polyethylene, crystalline propylene homopolymer, crystalline polypropylene-ethylene copolymer, crystalline polypropylene-ethene-butene-1 terpolymers, and above-mentioned mixture of polymers.
Be used for the preferably sodium salt of alkyl benzene sulphonate (ABS) of neutral alkylbenzene sulfonate of the present invention.Described alkyl benzene sulphonate (ABS) sodium salt is a kind of anion surfactant, and its temperature of initial decomposition is 300 ℃.
Therefore, cleaning mould machine when inner, this tensio-active agent even also present very strong detergent action in the high-temperature zone; Therefore, from the cold zone to the high-temperature zone, all present extremely excellent detergent action.
Weight with said composition is calculated, and the amount of sneaking into neutral alkyl benzene sulphonate (ABS) is preferably 1 to 20% (weight), preferably 5 to 15% (weight).If its consumption is lower than 1% (weight), when cleaning mould machine inside with resulting composition, its de-sludging weak effect.But, if consumption surpasses 20% (weight), then a large amount of foams can appear when grinding resulting composition.
The example that is used for inorganic filler of the present invention is lime carbonate or talcum powder.
With regard to cleaning combination, the inorganic filler role is to wipe the dirt in the mould machine and adhere to resin in early stage on the mould machine by mechanical force.Weight with said composition is calculated, and the amount of sneaking into inorganic filler is preferably 1 to 30% (weight), preferably 5 to 20% (weight).If mixed volume is lower than 1% (weight), de-sludging weak effect.If but surpassed 30% (weight), the melt fluidity of gained cleaning resin composition would reduce.Therefore, when cleaning, the load that imposes on mould machine is excessive.
The example that is used for hydrophobic compound of the present invention comprises synthetic wax, for example, and polyethylene wax, polysiloxane, natural wax, the metal-salt of higher fatty acid and the mixture of above-mentioned materials thereof.The consumption of the hydrophobic compound of sneaking into is preferably 0.5 to 10% (weight), preferably 2 to 10% (weight).In cleaning resin composition of the present invention, the effect of hydrophobic compound super fatting agent.Be less than 0.5% (weight) if sneak into the amount of hydrophobic compound, lubricant effect is poor, if but surpassing 10% (weight), lubrication is too strong, reduces so that coexist as the inorganic filler mechanical force of mould machine inside with it.
Can also add common and polyolefin resin blended phenolic antioxidant, sulfo-oxidation inhibitor, phosphorus-containing antioxidant etc.
With polyolefine and quantitative neutral alkylbenzene sulfonate, inorganic filler, hydrophobic compound, and at least a above-mentioned oxidation inhibitor is added to mixing stirring device (as Henschel mixing tank (trade(brand)name), super mixing tank, Deng) in, and, obtain the present composition thus with these raw material stirring mixing 1 to 5 minute.Then, the gained mixture is carried out fusion knead, and at 180 ° to 220 ℃, preferably 190 ° to 210 ℃ the fusion temperature of kneading adopts single multiple screw extruder or Bitruder that this mixture is extruded into pellet form.
Hereinafter embodiment and comparative example have done detailed description to the present invention, but the present invention are not construed as limiting.In addition, ratio used herein all is weight percentage.
Embodiment 1-5 and comparative example 1-4
Hereinafter the described composition that respectively mixes of table 1 is packed in the Henschel mixing tank (trade(brand)name), they are mixed 3 minutes then, and be 35mm and the extruding machine melt extrusion that has a venting port in 210 ℃ the fusion temperature of kneading by intracavity diameter with the gained mixture, and the gained raw material is extruded into pellet form, obtains cleaning resin composition of the present invention thus.In addition, in comparative example 1-4, respectively mix composition by stirring with the described identical method of embodiment 1-5 with what table 1 was hereinafter listed, mix, fusion is kneaded, and obtains pellet.The cleaning resin composition that employing obtains according to these embodiment and comparative example is pressed hereinafter described method, difference 1) cleaning injection moulding machine and 2) the cleaning blow moulding machine.
1) cleans injection moulding machine embodiment
With 35 tons of injection moulding machines, with 50 shot weights, to be difficult to carry out any ABS resin that color is replaced, the PPS resin, the black resin pellet of MODIFIED PP O resin carries out injection moulding, adopts embodiment 1-5 and the resulting cleaning resin composition of comparative example 1-4 (every kind of 100g) to clean injection moulding machine inside then, promptly, by injection moulding machine with the uncoloured polypropylene resin as cleaning resin injection moulding repeatedly, till the gained moulding product is colourless, and calculate the total amount of used cleaning resin.
In addition, use the injection moulding of black ABS resin under the same conditions, and with the uncoloured polypropylene resin as cleaning resin (not adopting above-mentioned cleaning resin composition) injection moulding repeatedly, till the gained moulding product is colourless, calculate the total amount of required cleaning resin.Table 2 is listed all these results.
2) embodiment of cleaning blow moulding machine
With die diameter is that 21mm and core rod diameter are the blow moulding machine of 19mm, to be difficult to carry out the ABS resin that color replaces or the black resin pellet extrusion molding of polyvinyl resin is 10 parisons (1 parisons: about 200g), use embodiment 1-5 and the resulting cleaning resin composition of comparative example 1-4 (every kind of 2000g) cleaning exhausted blow moulding machine then.Continue it, make parison formation as cleaning resin, till the seam having no that is difficult to most to carry out the gained parison that color replaces, calculate the total amount of required cleaning resin with colourless polyvinyl resin.
In addition, make parison formation with ABS resin under the same conditions, then need not described cleaning resin composition, only make parison formation as the cleaning resin with colourless polyvinyl resin, till this parison seam having no, calculate the total amount of required cleaning resin.Table 3 has been listed the gained result.
From table 2 and table 3 as can be seen, according to the present invention, when using cleaning resin composition shown in the embodiment 1-5 with short run respectively, compare with result shown in the comparative example 1-4, the former can reduce the amount of used cleaning resin significantly, and presents fabulous de-sludging effect.
In various mould machines, to early stage pigmentary resin carry out color when replacing, and when changing that early stage, resin cleaned, cleaning resin composition of the present invention has fabulous cleaning performance.
Promptly, compare with the method for passing through to adopt the enforcement when each color is replaced of cleaning resin to clean mould machine inside up to now, short run adopts cleaning resin composition of the present invention or adopts above-mentioned composition with cleaning the resin short run, can reduce the consumption that cleans resin significantly, and significantly shorten scavenging period.
By being carried out inner cleaning, injection moulding machine can show this effect.To adopt cleaning resin composition of the present invention to compare, the consumption of required cleaning resin can be reduced to approximately 1/5 to 1/10, also scavenging period can be foreshortened to about 1/5 to 1/10 with adopting single cleaning resin.
In addition, in addition at high temperature make engineering plastics (for example, with MODIFIED PP O resin, conducts such as polyphenylens sulfide resin early stages resin) moulding, replace in color, and when resin was replaced, cleaning resin composition of the present invention presented fabulous effect.
Table 1
Implement contrast contrast contrast contrast
Example 1 example 2 examples 3 examples 4 examples 5 are implemented
Low close---69.0%-41.0%--degree polyethylene polypropylene 75.0%-------88.0% alkylbenzene-1.5-7.5--4.0 16.0 9.0 sodium sulfonate alkyl benzene 7.5-14.5-19.5----potassium sulfonate polyoxyethylene-----the 5.0---hexadecane ether calcium carbonate-28.5-15.0-50.0 51.0--talcum powder 15.0-8.5-1.5----Tissuemat E 2.0 9.5 2.5 2.5---6.0-zinc stearate-0.5 3.0-8.0 10.0 2.0--odium stearate 0.5-3.0-2.0-2.0--silica------2.0 1.0 calcium stearates--------2.0 of example 1 example 2 examples 3 examples 4 high density-60.0% 68.5% 75.0%-35.0%-76.0%-polyethylene line style
Table 2
| Pigmentary resin | Cleaning resin composition | Clean the consumption of resin | ||
| Kind | Use temperature | Use composition | Do not use composition | |
| Black MODIFIED PP O resin 1) | Embodiment 4 composition comparative examples 1 composition comparative example 3 compositions | 320℃ ＂ ＂ | 600(g) 2110 2400 | 3270(g) ＂ ＂ |
| Black PPS resin 2) | Embodiment 3 composition comparative examples 2 composition comparative examples 3 compositions | ＂ ＂ ＂ | 560 2050 2250 | 3120 ＂ ＂ |
| Black ABS resin 3) | Embodiment 4 composition comparative examples 1 composition comparative example 3 composition embodiment 1 composition comparative example 2 composition comparative examples 4 compositions | 300℃ ＂ ＂ ＂ ＂ ＂ | 100 580 600 120 620 590 | 910 ＂ ＂ ＂ ＂ ＂ ＂ |
| Black ABS resin | Embodiment 4 composition embodiment 3 composition embodiment 2 composition comparative examples 1 composition comparative example 2 composition comparative examples 3 compositions | 260℃ ＂ ＂ ＂ ＂ ＂ | 140 180 190 740 760 700 | 1230 ＂ ＂ ＂ ＂ ＂ |
Table 2 (continuing)
| Pigmentary resin | Cleaning resin composition | Clean the consumption of resin | ||
| Kind | Use temperature | Use composition | Do not use composition | |
| Black ABS resin | Embodiment 4 composition embodiment 3 composition embodiment 5 composition comparative examples 1 composition comparative example 3 compositions | 230℃ ＂ ＂ ＂ ＂ | 260 300 320 860 980 | 1410 ＂ ＂ ＂ ＂ |
| Black PP resin 4) | Embodiment 3 composition embodiment 4 composition comparative examples 1 composition comparative example 3 compositions | 230℃ ＂ ＂ ＂ | 240 220 840 910 | 1305 ＂ ＂ ＂ |
| Black ABS resin | Embodiment 4 composition embodiment 1 composition comparative example 2 composition comparative examples 3 compositions | 200℃ ＂ ＂ ＂ | 360 380 1000 1270 | 1820 ＂ ＂ ＂ |
1) polyphenylene oxides
2) polyphenylene sulfide
3) propylene-butadiene-styrene copolymer
4) polypropylene
Table 3
| Pigmentary resin | Cleaning resin composition | Clean the consumption of resin | ||
| Kind | Use temperature | Use composition | Do not use composition | |
| Black ABS resin | Embodiment 3 composition embodiment 4 composition comparative examples 1 composition comparative example 3 compositions | 260℃ ＂ ＂ ＂ | 3.3 2.9 10.0 11.8 | 30.5 ＂ ＂ ＂ |
| Black ABS resin | Embodiment 4 composition embodiment 2 composition comparative examples 1 composition comparative example 2 composition comparative examples 3 compositions | 230℃ ＂ ＂ ＂ ＂ | 5.8 6.5 17.4 18.0 23.0 | 60.0 ＂ ＂ ＂ ＂ |
| Black HDPE resin 3) | Embodiment 1 composition embodiment 4 composition comparative examples 2 composition comparative examples 3 composition comparative examples 4 compositions | 230℃ ＂ ＂ ＂ ＂ | 5.7 5.5 17.7 20.4 22.8 | 57.5 ＂ ＂ ＂ ＂ |
| Black ABS resin | Embodiment 4 composition embodiment 5 composition comparative examples 1 composition comparative example 2 composition comparative examples 3 compositions | 200℃ ＂ ＂ ＂ ＂ | 7.0 7.4 18.0 20.0 26.0 | 70.5 ＂ ＂ ＂ ＂ |
1) high density polyethylene(HDPE)
Claims (3)
1. cleaning resin composition, said composition comprise polyolefin resin and with the neutral alkylbenzene sulfonate of this polyolefin resin blended, talcum powder or lime carbonate inorganic filler and hydrophobic compound, weight by said composition is calculated, said neutral alkylbenzene sulfonate, the weight percent of said talcum powder or lime carbonate inorganic filler and said hydrophobic compound is respectively 1 to 20%, 1 to 30% and 0.5 to 10%.
2. by the described cleaning resin composition of claim 1, wherein said polyolefin resin is polyethylene or polypropylene.
3. by the described cleaning resin composition of claim 1, said composition is the pellet of kneading and obtaining by fusion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63058688A JPH01234445A (en) | 1988-03-12 | 1988-03-12 | Resin composition for cleaning |
| JP58688/88 | 1988-03-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1035834A CN1035834A (en) | 1989-09-27 |
| CN1040881C true CN1040881C (en) | 1998-11-25 |
Family
ID=13091488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN89101345A Expired - Fee Related CN1040881C (en) | 1988-03-12 | 1989-03-10 | Cleaning resin composition |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0346956B1 (en) |
| JP (1) | JPH01234445A (en) |
| KR (1) | KR910005009B1 (en) |
| CN (1) | CN1040881C (en) |
| AU (1) | AU631115B2 (en) |
| CA (1) | CA1336487C (en) |
| DE (1) | DE68923037T2 (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2016368A1 (en) * | 1989-05-22 | 1990-11-23 | Hiroshi Takasu | A cleaning resin composition |
| JPH0321653A (en) * | 1989-06-20 | 1991-01-30 | Chisso Corp | Resin composition for washing |
| JPH0768552B2 (en) * | 1989-12-12 | 1995-07-26 | チッソ株式会社 | Cleaning resin composition |
| JP2526167B2 (en) * | 1990-08-06 | 1996-08-21 | チッソ株式会社 | Method for processing detergent composition for rubber processing machine |
| GB2282607A (en) * | 1993-10-06 | 1995-04-12 | Itac Limited | Stripping compositions comprising sulphonic acid and thickener |
| DE10329122B4 (en) * | 2003-06-27 | 2006-07-13 | Franz Hartmann | Process for cleaning food-processing machines with perforated discs and cleaning mass for use |
| DE10334293A1 (en) * | 2003-07-25 | 2005-03-03 | Lieberum, Evelyne | Cleaning composition for plastics processing machinery comprises anionic and nonionic surfactants, water, a polymer and other additives |
| JP2006335913A (en) * | 2005-06-03 | 2006-12-14 | Daicel Polymer Ltd | Resin composition for cleaning |
| US20100175720A1 (en) * | 2007-05-29 | 2010-07-15 | Asahi Kasei Chemicals Corporation | Cleaning agent and process for cleaning resin-molding machine using the same |
| JP5667754B2 (en) * | 2009-08-26 | 2015-02-12 | ダイセルポリマー株式会社 | Thermoplastic resin composition for cleaning |
| CN107107435A (en) | 2014-12-17 | 2017-08-29 | 日本合成化学工业株式会社 | Cleaning agent |
| CN104974870A (en) * | 2015-06-16 | 2015-10-14 | 郑州億润电缆材料有限公司 | Novel cleaning material for extruder screw and preparation method therefor |
| CN114480026B (en) * | 2020-10-23 | 2024-04-09 | 中国石油化工股份有限公司 | Screw cleaning agent with excellent performance and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2019422A (en) * | 1978-04-20 | 1979-10-31 | Gen Electric | Flame retardant crystalline polycarbonate compositions |
| EP0234529A2 (en) * | 1986-02-20 | 1987-09-02 | Chisso Corporation | A thermoplastic resin composition for cleaning |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0788520B2 (en) * | 1986-09-08 | 1995-09-27 | チッソ株式会社 | Thermoplastic resin composition |
| JPH0624724B2 (en) * | 1986-02-20 | 1994-04-06 | チッソ株式会社 | Thermoplastic resin composition for cleaning melt-kneading device |
-
1988
- 1988-03-12 JP JP63058688A patent/JPH01234445A/en active Pending
-
1989
- 1989-02-27 KR KR1019890002283A patent/KR910005009B1/en not_active IP Right Cessation
- 1989-03-08 CA CA000593120A patent/CA1336487C/en not_active Expired - Fee Related
- 1989-03-10 AU AU31219/89A patent/AU631115B2/en not_active Ceased
- 1989-03-10 CN CN89101345A patent/CN1040881C/en not_active Expired - Fee Related
- 1989-03-13 DE DE68923037T patent/DE68923037T2/en not_active Expired - Fee Related
- 1989-03-13 EP EP89201168A patent/EP0346956B1/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2019422A (en) * | 1978-04-20 | 1979-10-31 | Gen Electric | Flame retardant crystalline polycarbonate compositions |
| EP0234529A2 (en) * | 1986-02-20 | 1987-09-02 | Chisso Corporation | A thermoplastic resin composition for cleaning |
Also Published As
| Publication number | Publication date |
|---|---|
| CA1336487C (en) | 1995-08-01 |
| DE68923037D1 (en) | 1995-07-20 |
| KR890014721A (en) | 1989-10-25 |
| EP0346956A3 (en) | 1990-06-20 |
| AU631115B2 (en) | 1992-11-19 |
| DE68923037T2 (en) | 1995-11-30 |
| CN1035834A (en) | 1989-09-27 |
| EP0346956B1 (en) | 1995-06-14 |
| KR910005009B1 (en) | 1991-07-20 |
| AU3121989A (en) | 1989-09-14 |
| JPH01234445A (en) | 1989-09-19 |
| EP0346956A2 (en) | 1989-12-20 |
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| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
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