WO1989011501A1 - Flame retardant, antistatic thermoplastic - Google Patents
Flame retardant, antistatic thermoplastic Download PDFInfo
- Publication number
- WO1989011501A1 WO1989011501A1 PCT/US1989/001583 US8901583W WO8911501A1 WO 1989011501 A1 WO1989011501 A1 WO 1989011501A1 US 8901583 W US8901583 W US 8901583W WO 8911501 A1 WO8911501 A1 WO 8911501A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- flame retardant
- thermoplastic
- antistatic
- film
- water content
- Prior art date
Links
- 239000003063 flame retardant Substances 0.000 title claims abstract description 44
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 43
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 43
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000006260 foam Substances 0.000 claims abstract description 6
- 239000000203 mixture Substances 0.000 claims description 21
- 239000000853 adhesive Substances 0.000 claims description 15
- 230000001070 adhesive effect Effects 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000010410 layer Substances 0.000 claims description 14
- 239000012467 final product Substances 0.000 claims description 12
- 239000003963 antioxidant agent Substances 0.000 claims description 11
- 230000003078 antioxidant effect Effects 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 229910052736 halogen Inorganic materials 0.000 claims description 10
- 150000002367 halogens Chemical class 0.000 claims description 10
- 239000000047 product Substances 0.000 claims description 10
- 229920005992 thermoplastic resin Polymers 0.000 claims description 9
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 7
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical class [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 7
- 150000001408 amides Chemical class 0.000 claims description 6
- 150000001875 compounds Chemical class 0.000 claims description 6
- -1 flame retardant compound Chemical class 0.000 claims description 6
- 231100000252 nontoxic Toxicity 0.000 claims description 6
- 230000003000 nontoxic effect Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000004604 Blowing Agent Substances 0.000 claims description 5
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 5
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 239000012790 adhesive layer Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000002274 desiccant Substances 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000004677 Nylon Substances 0.000 claims description 2
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 239000005001 laminate film Substances 0.000 claims 2
- XSMJZKTTXZAXHD-UHFFFAOYSA-N ethene;2-methylprop-2-enoic acid Chemical compound C=C.CC(=C)C(O)=O XSMJZKTTXZAXHD-UHFFFAOYSA-N 0.000 claims 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims 1
- 229920002554 vinyl polymer Polymers 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 238000004806 packaging method and process Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract 1
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 239000002216 antistatic agent Substances 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 229920013665 Ampacet Polymers 0.000 description 2
- 239000004831 Hot glue Substances 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- SMEGJBVQLJJKKX-HOTMZDKISA-N [(2R,3S,4S,5R,6R)-5-acetyloxy-3,4,6-trihydroxyoxan-2-yl]methyl acetate Chemical compound CC(=O)OC[C@@H]1[C@H]([C@@H]([C@H]([C@@H](O1)O)OC(=O)C)O)O SMEGJBVQLJJKKX-HOTMZDKISA-N 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
- LJCFOYOSGPHIOO-UHFFFAOYSA-N antimony pentoxide Chemical compound O=[Sb](=O)O[Sb](=O)=O LJCFOYOSGPHIOO-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 229920000092 linear low density polyethylene Polymers 0.000 description 2
- 239000004707 linear low-density polyethylene Substances 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000007858 starting material Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- PZWQOGNTADJZGH-SNAWJCMRSA-N (2e)-2-methylpenta-2,4-dienoic acid Chemical compound OC(=O)C(/C)=C/C=C PZWQOGNTADJZGH-SNAWJCMRSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 210000001217 buttock Anatomy 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- WHHGLZMJPXIBIX-UHFFFAOYSA-N decabromodiphenyl ether Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC1=C(Br)C(Br)=C(Br)C(Br)=C1Br WHHGLZMJPXIBIX-UHFFFAOYSA-N 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 1
- 235000019404 dichlorodifluoromethane Nutrition 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- C08K9/00—Use of pretreated ingredients
Definitions
- Thermoplastics have been made separately with antistatic and flame retardant properties. This inven ⁇ tion combines both properties into one thermoplastic and the method for preparing the thermoplastic.
- the flame retardants and antistatic compounds are known in the art. There has been difficulty in combining the two into one thermoplastic compound.
- thermoplastic of this invention can be processed into any form as long as processing temperatures are below 450°F. Films can be extruded, co-extruded with other thermoplastic layers and laminated with or without reinforcing layers. The product can be blown into a foam.
- thermoplastic of this invention can be used in a variety of ways.
- sheeting can be made for temporary wall structures and floor insulation in the nuclear industry.
- the sheeting can also be used in the computer maintenance area to drape and floor work surfaces.
- the flame retardant and antista ⁇ tic thermoplastic is well suited for packaging and shipping needs.
- the thermoplastic can be used in a sheet for wrapping and as filler to protect equipment sensitive to an electronic charge.
- the flame retardant qualities are additional protection from hazards to the contents of wrapped or filled packaging.
- Another application is for thermoplastic coating of wires or pipe to be protected from electronic charges and fire damage.
- the thermoplastic can be used in many applica ⁇ tions and it is not intended to define the uses by this description but to give useful examples of the inven ⁇ tion.
- the thermoplastic of this invention is made of conventional thermoplastic resins which are dried at 165°F to 250°F with or without a desiccant so that they contain about 0.1% or less water.
- the antistatic agent is a nontoxic amide which is typically contained in a thermoplastic resin for mixing purposes.
- the flame retardant is similarly contained in a resin for mixing purposes and is an antimony oxide and organic halogen.
- the composition also contains an effective amount of hindered phenol and phosphite stabilizer package or bisphenol polyphenol antioxidants.
- the dried components are thoroughly mixed.
- the product may be processed in any manner compatible for thermoplastic up to temperature range of 450°F.
- the composition may be extruded, co-extruded with two layers of the same composition or another layer of thermoplas ⁇ tic, laminated with any type of film.
- the film lami ⁇ nates may be reinforced.
- a blowing agent can be added to the composition and a flame retardant and antistatic foam will be produced.
- thermoplastic chosen for this invention can be any type including but not limited to polyethylene of any density or form such as high density or linear low density polyethylene, poly- propylene of copolymers or homopolymers, ethylene vinyl acetate, ethylene methacry- lic acid and mixtures thereof.
- the thermoplastic is chosen considering factors such as cost, strength, stiffness and final product configuration in the parti ⁇ cular application.
- thermoplastic resin All the ingredients including the thermoplastic resin are dried prior to mixing to reduce the water content to 0.1% or less by weight.
- the drying can take place in an oven with or without a desiccant such as granular calcium sulfate.
- the components are typically dried at 165°F for three hours.
- the drying range can go up to 250°F.
- the temperature and length of drying time is dependent on the achievement of the 0.1% water content.
- the other ingredients are effective amounts of flame retardant, antistatic agent and antioxidant.
- These additives are commercially available in resins.
- the resin containing the additive promotes uniform mixing with the thermoplastic.
- the flame retardant, antistatic agent and antioxidant are dried as described above for the thermoplastic. All the ingredients contain 0.1% or less water prior to mixing.
- the antistatic compound is a nontoxic amide.
- the commercially available additive is 5% nontoxic amide in a low density polyethylene manufactured as Statcease CD by Techmer Corporation.
- the Statcease product with 5% active ingredient can be used in a 5% to 65% range in the composition of this invention.
- the flame retardant is antimony oxide specifically antimony trioxide or antimony pentoxide and an organic halogen.
- a commercial product by Ampacet Corporation includes effective amounts of antimony trioxide and decabromo- diphenyloxide in a linear low density polyethylene master batch.
- the antimony trioxide is 2% by weight and the organic halogen is 6% by weight in the final product.
- the fire retardant product is used in a range of 27% to 95% by weight of the final product.
- the final product contains at least 0.2% of an antioxidant hindered phenol and phosphite stabilizer package.
- a commercially available product is Ciba-Geigy Irganox 1010 which is added to the mixture.
- the starting materials can be mixed in any order of addition with the complete and thorough mixing after all the materials are added.
- the processing steps should not exceed 450°F.
- thermoplastics of this invention are self extinguishing once the source of heat is removed and passes the UL V-2 test.
- the flame retardant properties were tested by the National Fire Protection Association procedure and passed the large-scale and small-scale test.
- the material also has static decay properties in compliance with U.S. Military Specification 81705B.
- the thermoplastic can be extruded to form a film.
- the product can be used as one layer of a multi-layer laminated film with the film of this invention making up at least one of the layers.
- Any type of adhesive can be used such as a pressure sensitive adhesive, acrylic, polyvinyl chloride, acrylonitrile, silicone, solvent, hot melt or rubber based.
- a flame retardant package of antimony trioxide and organic halogen is added to the adhesive such that the final content includes about 1.1% Sb_0, and about 5.6% organic halogen.
- a film was made of the following ingredients dried for 3 hours at 165°F: 48% low density polyethylene; 2% Irganox 1010; 35% Ampacet Product Number 11371; 15% Techmer Statcease. The materials were thoroughly mixed and extruded to form a film.
- the adhesive was a solvent based acrylic with Sb 2 0-, organic halogen flame retardant additive.
- the adhesive is coated at 1 mil dry thickness.
- the adhesive layer holds into place a nonwoven reinforcing filament grid.
- a typical adhesive formula is shown in Table 1 which includes the volatile starting materials. After the adhesive dries, higher percentages of the flame retardant compounds are pre ⁇ sent.
- On one film coated with adhesive a nylon multifilament 460 denier with a Z twist is laid out in a diamond pattern grid. The grid is formed by filaments in two substantially parallel sets laid at 45° angles. The strands are laid out and spaced about 0.5 inches apart. The two thicknesses of film with the adhesive and reinforcing grid in between are passed between pressure rollers to form the laminate.
- the film as described in Example 1 or the rein ⁇ forced laminate as in Example 2 may be coated with a pressure sensitive adhesive to form a pressure sensitive tape.
- the adhesive may be a solvent based acrylic deposited at 30 lbs. per ream application weight.
- the adhesive may be applied by direct gravure or roll transfer coating.
- a release paper is provided.
- the film as described in Example 1 or the rein ⁇ forced laminate as in Example 2 may be coated with a hot melt adhesive to form a pressure sensitive tape.
- the adhesive is a rubber based hot melt adhesive commonly available from National Starch and Chemical Co. or Findley Adhesives, Inc. The adhesive is applied at a thickness of 6 mils to produce a permanent bonding tape. A release paper is provided.
- the thermoplastic as described may be mixed with a typical blowing agent of a chlorofluorocarbon such as Genetron 12 manufactured by Allied Signal Corp. and extruded into a foamed sheet.
- the blowing agent is injected into a molten phase of the thermoplastic material.
- the mixture is then forced through a die and upon the drop of pressure from inside the extruder to atmospheric pressures.
- the blowing agent expands to form a foamed sheet of density 6 to 8 lbs. per cubic foot.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
A thermoplastic having both flame retardant and antistatic properties and a method for making same. The thermoplastic can be extruded into films or blown into foam. The thermoplastic can be used in a number of applications such as packaging for sensitive equipment, metal coating, temporary sheeting in nuclear and electronic industry.
Description
FLAME RETARDANT, ANTISTATIC THERMOPLASTIC
BACKGROUND AND SUMMARY OF THE INVENTION
Thermoplastics have been made separately with antistatic and flame retardant properties. This inven¬ tion combines both properties into one thermoplastic and the method for preparing the thermoplastic. The flame retardants and antistatic compounds are known in the art. There has been difficulty in combining the two into one thermoplastic compound.
The benefits of an antistatic and flame retardant thermoplastic are that one film, foam or other final embodiment can be used instead of a dual system. The thermoplastic of this invention can be processed into any form as long as processing temperatures are below 450°F. Films can be extruded, co-extruded with other thermoplastic layers and laminated with or without reinforcing layers. The product can be blown into a foam.
The thermoplastic of this invention can be used in a variety of ways. For example, sheeting can be made for temporary wall structures and floor insulation in the nuclear industry. The sheeting can also be used in the computer maintenance area to drape and floor work surfaces. In addition, the flame retardant and antista¬ tic thermoplastic is well suited for packaging and shipping needs. The thermoplastic can be used in a sheet for wrapping and as filler to protect equipment sensitive to an electronic charge. The flame retardant qualities are additional protection from hazards to the
contents of wrapped or filled packaging. Another application is for thermoplastic coating of wires or pipe to be protected from electronic charges and fire damage. The thermoplastic can be used in many applica¬ tions and it is not intended to define the uses by this description but to give useful examples of the inven¬ tion.
The thermoplastic of this invention is made of conventional thermoplastic resins which are dried at 165°F to 250°F with or without a desiccant so that they contain about 0.1% or less water. The antistatic agent is a nontoxic amide which is typically contained in a thermoplastic resin for mixing purposes. The flame retardant is similarly contained in a resin for mixing purposes and is an antimony oxide and organic halogen. The composition also contains an effective amount of hindered phenol and phosphite stabilizer package or bisphenol polyphenol antioxidants.
The dried components are thoroughly mixed. The product may be processed in any manner compatible for thermoplastic up to temperature range of 450°F. The composition may be extruded, co-extruded with two layers of the same composition or another layer of thermoplas¬ tic, laminated with any type of film. The film lami¬ nates may be reinforced. A blowing agent can be added to the composition and a flame retardant and antistatic foam will be produced.
DETAILED DESCRIPTION OF THE INVENTION
The thermoplastic chosen for this invention can be any type including but not limited to polyethylene of any density or form such as high density or linear low density polyethylene, poly- propylene of copolymers or homopolymers, ethylene vinyl acetate, ethylene methacry- lic acid and mixtures thereof. The thermoplastic is chosen considering factors such as cost, strength,
stiffness and final product configuration in the parti¬ cular application.
All the ingredients including the thermoplastic resin are dried prior to mixing to reduce the water content to 0.1% or less by weight. The drying can take place in an oven with or without a desiccant such as granular calcium sulfate. The components are typically dried at 165°F for three hours. The drying range can go up to 250°F. The temperature and length of drying time is dependent on the achievement of the 0.1% water content.
The other ingredients are effective amounts of flame retardant, antistatic agent and antioxidant. These additives are commercially available in resins. The resin containing the additive promotes uniform mixing with the thermoplastic. The flame retardant, antistatic agent and antioxidant are dried as described above for the thermoplastic. All the ingredients contain 0.1% or less water prior to mixing.
The antistatic compound is a nontoxic amide. The commercially available additive is 5% nontoxic amide in a low density polyethylene manufactured as Statcease CD by Techmer Corporation. The Statcease product with 5% active ingredient can be used in a 5% to 65% range in the composition of this invention.
The flame retardant is antimony oxide specifically antimony trioxide or antimony pentoxide and an organic halogen. A commercial product by Ampacet Corporation (Product Number 11371) includes effective amounts of antimony trioxide and decabromo- diphenyloxide in a linear low density polyethylene master batch. The antimony trioxide is 2% by weight and the organic halogen is 6% by weight in the final product. The fire retardant product is used in a range of 27% to 95% by weight of the final product.
The final product contains at least 0.2% of an antioxidant hindered phenol and phosphite stabilizer
package. A commercially available product is Ciba-Geigy Irganox 1010 which is added to the mixture.
The starting materials can be mixed in any order of addition with the complete and thorough mixing after all the materials are added. The processing steps should not exceed 450°F.
The thermoplastics of this invention are self extinguishing once the source of heat is removed and passes the UL V-2 test. The flame retardant properties were tested by the National Fire Protection Association procedure and passed the large-scale and small-scale test. The material also has static decay properties in compliance with U.S. Military Specification 81705B. The thermoplastic can be extruded to form a film. The product can be used as one layer of a multi-layer laminated film with the film of this invention making up at least one of the layers. Any type of adhesive can be used such as a pressure sensitive adhesive, acrylic, polyvinyl chloride, acrylonitrile, silicone, solvent, hot melt or rubber based. A flame retardant package of antimony trioxide and organic halogen is added to the adhesive such that the final content includes about 1.1% Sb_0, and about 5.6% organic halogen.
EXAMPLE 1
A film was made of the following ingredients dried for 3 hours at 165°F: 48% low density polyethylene; 2% Irganox 1010; 35% Ampacet Product Number 11371; 15% Techmer Statcease. The materials were thoroughly mixed and extruded to form a film.
EXAMPLE 2
Two films as described in Example 1 were used to make a 2-ply reinforced laminate. The adhesive was a solvent based acrylic with Sb20-, organic halogen flame
retardant additive. The adhesive is coated at 1 mil dry thickness. The adhesive layer holds into place a nonwoven reinforcing filament grid. A typical adhesive formula is shown in Table 1 which includes the volatile starting materials. After the adhesive dries, higher percentages of the flame retardant compounds are pre¬ sent. On one film coated with adhesive a nylon multifilament 460 denier with a Z twist is laid out in a diamond pattern grid. The grid is formed by filaments in two substantially parallel sets laid at 45° angles. The strands are laid out and spaced about 0.5 inches apart. The two thicknesses of film with the adhesive and reinforcing grid in between are passed between pressure rollers to form the laminate.
TABLE 1
Fire Retardant Adhesive Formula
Hexane 16.72%
Ethyl Acetate 26.05%
Antimony Oxide 0.65%
Organic Bromine 3.24%
Acrylic Concentrate 53.34%
EXAMPLE 3
The film as described in Example 1 or the rein¬ forced laminate as in Example 2 may be coated with a pressure sensitive adhesive to form a pressure sensitive tape. The adhesive may be a solvent based acrylic deposited at 30 lbs. per ream application weight. The adhesive may be applied by direct gravure or roll transfer coating. A release paper is provided.
EXAMPLE 4
The film as described in Example 1 or the rein¬ forced laminate as in Example 2 may be coated with a hot melt adhesive to form a pressure sensitive tape. The adhesive is a rubber based hot melt adhesive commonly available from National Starch and Chemical Co. or Findley Adhesives, Inc. The adhesive is applied at a thickness of 6 mils to produce a permanent bonding tape. A release paper is provided.
EXAMPLE 5
The thermoplastic as described may be mixed with a typical blowing agent of a chlorofluorocarbon such as Genetron 12 manufactured by Allied Signal Corp. and extruded into a foamed sheet. The blowing agent is injected into a molten phase of the thermoplastic material. The mixture is then forced through a die and upon the drop of pressure from inside the extruder to atmospheric pressures. The blowing agent expands to form a foamed sheet of density 6 to 8 lbs. per cubic foot.
Claims
1. A method for making a flame retardant and antistatic thermoplastic comprising the steps of:
(a) drying the thermoplastic resin;
(b) drying the fire retardant composition;
(c) drying the antistatic composition;
(d) drying the antioxidant;
(e) mixing thoroughly the thermoplastic resin, fire retardant composition, antioxidant and antistatic composition; and
(f) processing the mixture to process a final thermoplastic produced at temperatures below 450°F.
2. A method for making a flame retardant and antistatic thermoplastic of claim 1 wherein steps (a) , (b) , (c) and (d) the drying process is carried out until about 0.1% water or less by weight remaining in the resin, fire retardant composition, antioxidant and antistatic compositions and the drying temperature is between 165°F and 250°F.
3. A method for making a flame retardant and antistatic thermoplastic of claim 1 wherein steps (a) , (b) , (c) and (d) the drying process of the resin, fire retardant antioxidant and antistatic compositions is performed in the presence of a desiccant.
4. A method for making a flame retardant and antistatic thermoplastic of claim 1 wherein step (e) the mixture is extruded at process temperatures below 450°F.
5. A method for making a flame retardant and antistatic thermoplastic of claim 1 wherein during step e a blowing agent is added and the material is processed into a foam product.
6. A flame retardant and antistatic thermoplastic comprising: a thermoplastic; an antistatic compound of thermoplastic resin containing about 5% nontoxic amide with about 0.1% or less water content by weight; an effective amount of flame retardant with about 0.1% or less water content by weight; and a hindered phenol and phosphite antioxidant with about 0.1% or less water content at least 0.2% by weight of the final product.
7. A flame retardant and antistatic thermoplastic of claim 6 wherein said flame retardant compound is a thermoplastic resin containing about 2% antimony oxides and about 6% organic halogen.
8. A flame retardant and antistatic thermoplastic of claim 6 wherein the final product is an extruded thermoplastic film.
9. A flame retardant and antistatic thermoplastic of claim 6 wherein the final product is a co-extruded film of at least two film layers, at least one of said films having the composition of claim 6.
10. A flame retardant and antistatic thermoplastic wherein the final product is at least two layers of laminated film at least one of said films having the composition of claim 6 and the laminate adhesive has an effective amount of flame retardant.
11. A flame retardant and antistatic thermoplastic of claim 6 wherein the final product is at least two layers of laminated film at least one of said films having the composition of claim 6; laminate adhesive layer with an effective amount of flame retardant; and
a nonwoven reinforcing, filament laid out in a diamond grid is held between two layers of film by the adhesive layer.
12. A flame retardant and antistatic thermoplastic of claim 6 which is blown to make a foam.
13. A flame retardant and antistatic thermoplastic comprising: an antistatic compound of thermoplastic resin containing about 5% nontoxic amide with about 0.1% or less water content in about 5% to about 65% by weight of the final product; a flame retardant compound of a thermoplastic resin containing about 2% antimony oxides and about 6% organic halogen with about 0.1% or less water content in about 25% to about 95% of the final product; a hindered phenol and phosphite antioxidant with about 0.1% or less water content in at least 0.2% by weight of the final product; and a thermoplastic with about 0.1% or less water content making up the balance of the product selected from the group consisting essentially of polyethylene, polypropylene, ethylene vinyl ace¬ tate, ethylene methylacrylic acid and mixtures thereof.
14. A reinforced flame retardant and antistatic laminate film comprising: two layers of an extruded film of thermoplas¬ tic with about 0.1% or less water content; said film containing an effective amount of antistatic compound of a nontoxic amide with about 0.1% or less water content;
said film containing an effective amount of flame retardant of antimony oxides and organic halogen with about 0.1% or less water content; said film containing at least 0.2% of an effective amount of antioxidant of a hindered phenol and phosphite; a nonwoven reinforcing filament laid out in a diamond grid between said layers of film; and said nonwoven reinforcing filament grid held between said film layers by an adhesive layer with an effective amount of flame retardant of antimony oxides and organic halogen.
15. A reinforced flame retardant and antistatic laminate film of claim 14 wherein said nonwoven rein¬ forcing filament is nylon multifilament.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19804788A | 1988-05-24 | 1988-05-24 | |
| US198,047 | 1988-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1989011501A1 true WO1989011501A1 (en) | 1989-11-30 |
Family
ID=22731794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1989/001583 WO1989011501A1 (en) | 1988-05-24 | 1989-04-14 | Flame retardant, antistatic thermoplastic |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0415984A1 (en) |
| AU (1) | AU633255B2 (en) |
| WO (1) | WO1989011501A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2432677A1 (en) * | 1941-05-17 | 1976-01-22 | Grachten & Soehne Gmbh E | Curved portion to furniture moulded in polyurethane foam - with smooth surface formed of sheet placed in mould before foaming |
| FR2346398A1 (en) * | 1976-03-29 | 1977-10-28 | Nat Distillers Chem Corp | COMBUSTION RETARDANT POLYOLEFIN COMPOSITIONS, IRRADIATION HARDENABLE |
| EP0144015A1 (en) * | 1983-11-14 | 1985-06-12 | MONTEDIPE S.p.A. | Self-extinguishing compositions based on ethylene vinylacetate copolymers suitable for the preparation of foamed materials |
-
1989
- 1989-04-14 WO PCT/US1989/001583 patent/WO1989011501A1/en not_active Application Discontinuation
- 1989-04-14 EP EP19890905940 patent/EP0415984A1/en not_active Withdrawn
- 1989-04-14 AU AU35773/89A patent/AU633255B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2432677A1 (en) * | 1941-05-17 | 1976-01-22 | Grachten & Soehne Gmbh E | Curved portion to furniture moulded in polyurethane foam - with smooth surface formed of sheet placed in mould before foaming |
| FR2346398A1 (en) * | 1976-03-29 | 1977-10-28 | Nat Distillers Chem Corp | COMBUSTION RETARDANT POLYOLEFIN COMPOSITIONS, IRRADIATION HARDENABLE |
| EP0144015A1 (en) * | 1983-11-14 | 1985-06-12 | MONTEDIPE S.p.A. | Self-extinguishing compositions based on ethylene vinylacetate copolymers suitable for the preparation of foamed materials |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0415984A1 (en) | 1991-03-13 |
| AU3577389A (en) | 1989-12-12 |
| AU633255B2 (en) | 1993-01-28 |
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