WO2003055946A1 - A composition for smc/bmc automotive parts - Google Patents

A composition for smc/bmc automotive parts Download PDF

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Publication number
WO2003055946A1
WO2003055946A1 PCT/EP2002/014516 EP0214516W WO03055946A1 WO 2003055946 A1 WO2003055946 A1 WO 2003055946A1 EP 0214516 W EP0214516 W EP 0214516W WO 03055946 A1 WO03055946 A1 WO 03055946A1
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WO
WIPO (PCT)
Prior art keywords
smc
bmc
mixture
composition
additive
Prior art date
Application number
PCT/EP2002/014516
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English (en)
French (fr)
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WO2003055946A8 (de
Inventor
Anna Gerdine Van De Bovenkamp-Bouwman
Maatje Gerharda Roolvink-Verhaagen
Johannes Martinus Gerardus Maria Reijnders
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Akzo Nobel N.V.
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.)
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Publication date
Application filed by Akzo Nobel N.V. filed Critical Akzo Nobel N.V.
Priority to AU2002363883A priority Critical patent/AU2002363883A1/en
Publication of WO2003055946A1 publication Critical patent/WO2003055946A1/de
Publication of WO2003055946A8 publication Critical patent/WO2003055946A8/de

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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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • 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
    • C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
    • C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
    • C08F299/04—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polyesters
    • C08F299/0442—Catalysts
    • C08F299/045—Peroxy-compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/06—Unsaturated polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L31/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid or of a haloformic acid; Compositions of derivatives of such polymers
    • C08L31/02—Homopolymers or copolymers of esters of monocarboxylic acids
    • C08L31/04—Homopolymers or copolymers of vinyl acetate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes

Definitions

  • the present invention relates to a composition for SMC/BMC automotive parts.
  • SMC stands for sheet moulding compound and BMC for bulk moulding compound.
  • SMC and BMC compositions typically contain an unsaturated polyester (UP) resin, a filler, processing aids such as a releasing agent and a thickening agent, glass fibre, and a cure system.
  • the cure system typically comprises a peroxide initiator and sometimes an accelerator.
  • Said compositions usually are stable at ambient temperature in an uncured form for several months, i.e. they have a long shelf life or pot life.
  • SMC/BMC parts prepared from compositions that belong to the prior art have a number of drawbacks including a too high total volatiies content (these volatiies include compounds such as benzene, styrene, acetone, methyl acetate, tert-butylalcohol, 1,2-propanediol, and 2-ethylhexanol, some of which are formed after the decomposition of certain peroxide(s) used in the cure system), in particular a too high benzene content, and bad smell.
  • tert-butyl peroxybenzoate e.g.
  • Trigonox ® C ex Akzo Nobel
  • Trigonox ® C is commonly used in cure systems for SMC/BMC parts, but the use of this peroxide causes the formation of high levels of benzene.
  • WO-A-95/13318 to Ashland discloses the use of a polycapped oligomer in SMC resin compositions for enhancing the performance of thermoplastic low profile (LP) additives which improve the surface quality (i.e. a better class "A" surface) of moulded composites such as automotive body panels.
  • LP thermoplastic low profile
  • Example 1 on page 18 of this document compositions are shown comprising an unsaturated polyester resin, an LP additive, a mixture of two peroxides, i.e.
  • JP-A-09227611 to Kayaku Akzo discloses peroxide compositions which are useful for curing and moulding unsaturated polyesters (SMC and BMC).
  • Said compositions contain a peroxide having a decomposition temperature of 83- 120°C when its half-life is 10 hours, a peroxide having a decomposition temperature of 40-83°C when its half-life is 10 hours, and a phenolic compound showing polymerisation-inhibiting activity.
  • a composition is disclosed comprising a polystyrene shrinkage-reducing agent, a mixture of two peroxides, i.e.
  • the peroxide composition gives an appropriate curing velocity to SMC and BMC, the SMC and BMC compositions have a long pot life and shelf life, and the fibre reinforced products have an improved surface external appearance.
  • US 5,380,799 relates to the room temperature curing of a resin composition
  • a resin composition comprising a mixture of thermoplastic polymers of vinyl acetate and an epoxy compound, a dialkyl-p-toluidine accelerator, a low temperature free radical peroxide initiator, and an alkali metal or transition metal compound.
  • a preferred initiator is a blend of cumene hydroperoxide and acetyl acetone peroxide, the one-hour half-life temperatures of which are both higher than 100°C.
  • the present invention provides a composition which can be used for preparing SMC and BMC automotive parts having a low total volatiies content, in particular a low benzene content, and having low smell. It is desired that the uncured composition has a storage stability of at least 4-6 weeks, preferably 3-6 months at 20°C. In the art, it is further desired that the SMC and BMC parts have a good surface quality, preferably a so-called class A surface. Also, it is preferred in the art that the composition be a fast- curing composition, which reduces the residual styrene content and shortens the production time. Finally, it is preferred that the composition does not need an additional postcure.
  • composition of the present invention comprises: (a) an unsaturated polyester resin,
  • the unsaturated polyester (UP) resin to be used in accordance with the present invention may be any known resin commonly used for making SMC/BMC parts.
  • Suitable UP resins include high-reactive ortho- or iso-phthalic acid resins, pure maleic acid resins, and mixtures thereof.
  • suitable UP resins for use in accordance with the present invention include Palapreg P18, Palapreg P17, and Synolite 0423.
  • LP additives improve the surface smoothness or "profile" of SMC/BMC parts.
  • LS additives reduce shrinkage during the curing of SMC/BMC parts.
  • said LP or LS additive does not contain benzene. More preferably, in the composition of the present invention use is made of an LP or LS additive which forms a dispersion or a suspension in combination with the UP resin.
  • Suitable LP and LS additives are based on polystyrene, saturated polyester, polyvinylacetate or polyurethane.
  • suitable additives include Palapreg H852 (a saturated polyester resin, LP additive, ex DSM-BASF), Palapreg H814 (a polystyrene resin, LS additive, ex DSM-BASF), Palapreg H1080 (a polyvinylacetate, LP additive, ex DSM-BASF), LP40A (a polyvinylacetate, LP additive, ex Union Carbide), and LP 138-46 (a polyurethane, LP additive, ex Ashland).
  • a typical SMC/BMC composition contains 50-90, preferably 60-80, more preferably 65-75 parts ' by weight of UP resin and 10-50, preferably 20-40, more preferably 25-35 parts by weight of LP/LS additive, respectively.
  • the amounts of the other constituents of the claimed SMC/BMC composition are expressed in parts by weight per a total of hundred parts by weight of UP resin plus LP/LS additive, abbreviated as "phr.”
  • HLT one-hour half-life temperature
  • Suitable peroxides having an HLT of 100°C or lower include di(3,5,5- trimethylhexanoyl) peroxide (e.g. Trigonox ® 36, ex Akzo Nobel), 2,5-dimethyl- 2,5-di(2-ethylhexanoylperoxy)hexane (e.g.
  • Trigonox ® 141 Ex Akzo Nobel
  • 1 ,1 ,3,3-tetramethylbutyl peroxy-2-ethylhexanoate e.g. Trigonox ® 421 , ex Akzo Nobel
  • tert-amyl peroxy-2-ethylhexanoate e.g. Trigonox ® 121 , ex Akzo Nobel
  • tert-butylperoxy 2-ethylhexanoate e.g. Trigonox ® 21 , ex Akzo Nobel
  • Suitable peroxides having an HLT higher than 100°C include 1 ,1-di(tert- butylperoxy)-3,5,5-trimethylcyclohexane (e.g. Trigonox ® 29, ex Akzo Nobel), 1 ,1-di(tert-butylperoxy)cyclohexane (e.g. Trigonox ® 22, ex Akzo Nobel), tert- butyl peroxy-3,5,5-trimethylhexanoate (e.g. Trigonox ® 42S, ex Akzo Nobel), tert- butylperoxy isopropyl carbonate (e.g.
  • Trigonox ® BPIC Trigonox ® BPIC, ex Akzo Nobel
  • tert- butylperoxy 2-ethylhexyl carbonate e.g. Trigonox ® 117, ex Akzo Nobel
  • tert-amyl peroxy 2-ethylhexyl carbonate e.g. Trigonox ® 131 , ex Akzo Nobel
  • a mixture of two peroxides is used, one having an HLT of 75-95°C, more preferably 85-95°C, and the other having an HLT of 105-125°C, more preferably 110-120°C.
  • Particularly useful mixtures of peroxides to be used in accordance with the present invention include Trigonox ® 21 (HLT of 91°C) and Trigonox ® 117 (HLT of 117°C), Trigonox ® 121 (HLT of 91 °C) and Trigonox ® 117, Trigonox ® 141 (HLT of 86°C) and Trigonox ® 131 (HLT of 113°C), and Trigonox ® 21 and Trigonox ® BPIC (HLT of 117°C).
  • the total amount of peroxide to be used in accordance with the present invention typically is in the range of 0.5-2.5, preferably 1-2, more preferably 1.4- 1.6 phr.
  • a transition metal salt or complex is used as an accelerator for the cure.
  • Suitable transition metal salts and complexes are known to a person skilled in the art. Mixtures of transition metal salts, transition metal complexes or of a transition metal salt and a transition metal complex may also be used in the composition of the present invention. Examples of suitable transition metal salts and complexes include manganese naphthenate, cobalt naphthenate, cobalt octanoate, copper naphthenate, copper acetate, and cobalt acetate.
  • a cobalt (Co) salt or complex, a copper (Cu) salt or complex, or a mixture thereof is used in accordance with the present invention.
  • Any cobalt and/or copper salt or complex may be used in the composition of the invention.
  • Suitable accelerators jnclude cobalt salts (e.g. Accelerator 6050, ex Akzo Nobel), such as cobalt octanoate (e.g. Accelerator NL-51 P, ex Akzo Nobel), and cobalt complexes (e.g. Accelerator 383, ex Akzo Nobel).
  • a mixture of a cobalt salt or complex and a copper salt or complex is used in accordance with the present invention.
  • a particularly suitable accelerator is a complex containing cobalt acetate and copper acetate, which is available as Accelerator R-553 from Akzo Nobel.
  • the amount of accelerator to be used in accordance with the present invention typically is in the range of 0.1-2, preferably 0.2-1 , more preferably 0.4-0.6 phr.
  • the composition of the present invention further contains a filler such as calcium carbonate or calcium sulfate, a releasing agent such as zinc stearate or calcium stearate, a thickening agent such as magnesium oxide, magnesium hydroxide, calcium oxide or calcium hydroxide, and glass fibre reinforcement.
  • a filler such as calcium carbonate or calcium sulfate
  • a releasing agent such as zinc stearate or calcium stearate
  • a thickening agent such as magnesium oxide, magnesium hydroxide, calcium oxide or calcium hydroxide
  • glass fibre reinforcement such as magnesium oxide, magnesium hydroxide, calcium oxide or calcium hydroxide, and glass fibre reinforcement.
  • a typical SMC/BMC composition comprises 50-90 parts by weight of UP resin, 50-10 parts by weight of LP/LS additive (a total of 100 parts by weight of resin plus additive), 100-300 phr of a filler, 0.1-10 phr of a releasing agent, 0.1-5 phr of a thickening agent, 50-150 phr of glass fibre, 0.5-2.5 phr of a mixture of at least two peroxides, and 0.1-2 phr of an accelerator.
  • a preferred SMC/BMC composition comprises 60-80 parts by weight of UP resin, 20-40 parts by weight of LP/LS additive (a total of 100 parts by weight of resin plus additive), 150-250 phr of a filler, 3-7 phr of a releasing agent, 0.5-3 phr of a thickening agent, 70- 100 phr of glass fibre, 1-2 phr of a mixture of two peroxides, and 0.2-1 phr of an accelerator.
  • the composition of the present invention typically is cured lunder pressure in a hot mould in a conventional way using known methods and equipment.
  • the cure temperature typically is in the range of 100-200°C, preferably 130-170°C, more preferably 140-160°C.
  • the cure time typically is from 0.1-60 min, preferably 0.5-10 min, more preferably 1-5 min.
  • the present invention is illustrated by the following Examples.
  • the residual styrene content (expressed in m/m%) was determined in accordance with GC/94.5.
  • the technique used is capillary gas chromatography with split injection and flame ionization detection.
  • the sampel is extracted with dichloromethane, and the extract is separated in a chemically bonded non-polar stationary phase.
  • the styrene content is determined according to the internal standard method using tert-butylbenzene as the internal standard.
  • the smell was determined in accordance with VDA 270 B2. In this method, part of the SMC/BMC product is put in a glass pot above a certain amount of water. This glass pot is put into an oven at 40°C during 24 hrs. After this time, a panel of 5 people judges the smell of these samples on a scale of 1 to 6, where 1 means the smell is not noticeable and 6 means the smell is intolerable.
  • the total volatiies content (expressed in ⁇ g C/g SMC/BMC product) was determined in accordance with VDA 277 (a VW/Audi automotive industry standard).
  • the technique used is static headspace capillary gas chromatography with split injection. A fixed weight of sample particles is transferred to a 20 ml septum vial. The septum vial is placed in the oven (at 120°C) of the headspace sampler. After 5 hrs, 1 ml of the headspace gas is transferred to the GC and is separated in a chemically bonded non-polar stationary phase.
  • the ⁇ g C/g content of emitted volatile components is determined according to the external standard method using acetone as the external standard. The method is a relative method and allows one to compare different samples.
  • the benzene content was calculated from the total volatiies content and is also expressed in ⁇ g C/g SMC/BMC product.
  • composition consisted of (in phr): UP resin, 70; LP/LS additive, 30; Durcal 5, 200 (a filler); zinc stearate, 5 (a releasing agent); Luvatol MK35, 1.5 (a thickening agent); glass, 75; peroxide mixture, 1.5; and accelerator, 0.5.
  • This compound was cured in a reactometer (Reactometer SMC Technology, ex Arthur & Kr ⁇ ger OHG) under the conditions described above.
  • An amount of 240 g of the compound was put into a mould of 12x25 cm.
  • the mould was closed and put under a pressure of 100 bar - i.e. 100x10 5 Pa - (trigger pressure of 65 bar) during the cure time (MMT plus 60 sec).
  • the mould opened automatically and the pressed plate (thickness approx. 4 mm) was taken from the mould and the sample was analyzed as described above.
  • Examples 2 to 8 show that independent of the cure system and additive used, results were obtained which fulfill the requirements of the automotive industry with respect to total volatiies content, in particular benzene content, and smell.
  • the MMT and the efficiency (evident from the residual styrene content) of the exemplified compositions are also satisfactory.
  • the shelf life of all tested compounds was more than 3 months.
  • UP-resin Palapreg P18, LP additive Palapreg H852 or LS additive Palapreg H814, weight ratio resin/additive of 70/30.
  • Each composition consisted of (in phr): UP-resin, 70; LP/LS additive, 30; BYK W9010, 1.5 (a wetting and dispersing additive); Millicarb OG, 200 (a filler); zinc stearate, 4.5 (a releasing agent); and Luvatol MK35NV, 1.9 (a thickening agent).
  • the glass added is expressed as glass weight and was 28 m/m% of the total compound.
  • the base viscosities were determined with Brookfield viscometers RVT and HBT, spindle 6, 10 rpm at 30°C.
  • the thickening of all compositions was measured with a Brookfield HBT at room temperature.
  • Each composition was prepared in an amount of 9-10 kg in the form of an SMC paste, as follows:
  • the resin, LP/LS additive, wetting and dispersing additive, releasing agent, and cure system were weighed in a mixing tank and were mixed at a low speed (a circumferential speed of 6.4 m/s) under a dissolver. 2. The filler was weighed and dosed at low mixing speed (a circumferential speed of 6.4 m/s) to the resin-containing mixture.
  • the dispersion was mixed during 2 min at high speed (a circumferential speed of 15.6 m/s).
  • the thickening agent was weighed and then added while mixing at a low speed (a circumferential speed of 6.4 m/s) during 1 min.
  • the SMC pastes were dosed to the doctor blade boxes of a Schmidt & Heinzmann SMC laboratory line (HM-LB-23) to produce SMC products with a weight of around 4,000 + 200 g/m 2 and a glass content of 28 ⁇ 3%.
  • HM-LB-23 Schmidt & Heinzmann SMC laboratory line
  • the SMC products were moulded on a 160 ton Zeulenroda press in a 30x40 cm steel mould to produce plates with a thickness of 2.5-3.5 mm.
  • the pressure on the plate during the moulding was between 80 and 100 bar.
  • the moulding time was varied between 90 and 180 seconds at moulding temperatures of 145-155°C.
  • the results of Examples 9-11 for SMC products are comparable to the results obtained for the BMC products of Examples 2-8 and the same conclusions can be drawn.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

The invention relates to a composition for SMC/BMC automotive parts comprising: (a) an unsaturated polyester resin, (b) a suitable low profile or low shrink additive or a mixture thereof; (c) a mixture of at least two peroxides neither of which contains a benzoyl group, one having a one-hour half-life temperature of 100°C or lower and the other having a one-hour half-life temperature of higher than 100°C, and (d) a transition metal salt or complex. Preferably, the additive does not contain benzene. It is further preferred that a mixture of two peroxides is used, one having a one-hour half-life temperature of 75-95°C and the other having a one-hour half-life temperature of 105-125°C. Preferably, the composition comprises a cobalt salt or complex, a copper salt or complex, or a mixture thereof. The invention further relates to a process for preparing an SMC or BMC automotive part comprising curing said composition. The use of the composition of the present invention allows for the preparation of SMC/BMC products having a low total volatiles content and a low smell.
PCT/EP2002/014516 2002-01-02 2002-12-18 A composition for smc/bmc automotive parts WO2003055946A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002363883A AU2002363883A1 (en) 2002-01-02 2002-12-18 A composition for smc/bmc automotive parts

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02075059 2002-01-02
EP02075059.2 2002-01-02

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WO2003055946A8 WO2003055946A8 (de) 2004-05-21

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009071670A1 (en) * 2007-12-06 2009-06-11 Dsm Ip Assets B.V. Peroxide composition
WO2010149546A1 (en) * 2009-06-22 2010-12-29 Borealis Ag Stabilized polypropylene-talc composite
WO2012150138A1 (en) 2011-05-02 2012-11-08 Elantas Gmbh Low-emission fibre-matrix material curable thermally by radical polymerization
JP2013221145A (ja) * 2012-04-19 2013-10-28 Nof Corp 架橋剤混合物および太陽電池用封止材組成物
JP2014505148A (ja) * 2011-01-31 2014-02-27 ユナイテッド・イニシエターズ・ゲーエムベーハー・ウント・コー・カーゲー エチレン酢酸ビニルの架橋を加速するための過酸化物のブレンド
CN105754311A (zh) * 2016-03-16 2016-07-13 无锡新宏泰电器科技股份有限公司 一种bmc聚酯模塑料及其制备方法和应用
WO2022108878A1 (en) * 2020-11-23 2022-05-27 Lyondellbasell Advanced Polymers Inc. Thermoset polyester bmc formula for direct metallized forward lighting reflector

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Publication number Priority date Publication date Assignee Title
EP0309088A2 (de) * 1987-09-24 1989-03-29 Morton International, Inc. Pulver für IMC-Beschichtung enthaltend 1,1'-di(t-butylperoxy)-3,3,5-trimethylcyclohexan als Initiator.
US5380799A (en) * 1991-12-31 1995-01-10 Reichhold Chemicals, Inc. Moldable resin composition
WO1995013318A1 (en) * 1993-11-12 1995-05-18 Ashland Oil, Inc. Enhancers for thermoplastic low profile additives
JPH09227611A (ja) * 1996-02-23 1997-09-02 Kayaku Akzo Kk パーオキサイド組成物及びそれを用いる硬化成形法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0309088A2 (de) * 1987-09-24 1989-03-29 Morton International, Inc. Pulver für IMC-Beschichtung enthaltend 1,1'-di(t-butylperoxy)-3,3,5-trimethylcyclohexan als Initiator.
US5380799A (en) * 1991-12-31 1995-01-10 Reichhold Chemicals, Inc. Moldable resin composition
WO1995013318A1 (en) * 1993-11-12 1995-05-18 Ashland Oil, Inc. Enhancers for thermoplastic low profile additives
JPH09227611A (ja) * 1996-02-23 1997-09-02 Kayaku Akzo Kk パーオキサイド組成物及びそれを用いる硬化成形法

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009071670A1 (en) * 2007-12-06 2009-06-11 Dsm Ip Assets B.V. Peroxide composition
US9109107B2 (en) 2007-12-06 2015-08-18 Dsm Ip Assets B.V. Peroxide composition
WO2010149546A1 (en) * 2009-06-22 2010-12-29 Borealis Ag Stabilized polypropylene-talc composite
CN102449051A (zh) * 2009-06-22 2012-05-09 北欧化工公司 稳定的聚丙烯-滑石组合物
US8871834B2 (en) 2009-06-22 2014-10-28 Borealis Ag Stabilized polypropylene-talc composite
RU2515437C2 (ru) * 2009-06-22 2014-05-10 Бореалис Аг Стабилизированный композит на основе тальконаполненного полипропилена
JP2014505148A (ja) * 2011-01-31 2014-02-27 ユナイテッド・イニシエターズ・ゲーエムベーハー・ウント・コー・カーゲー エチレン酢酸ビニルの架橋を加速するための過酸化物のブレンド
KR101819701B1 (ko) * 2011-01-31 2018-01-17 유나이티드 이니시에이터스 게엠베하 촉진 방식의 에틸렌 비닐 아세테이트 가교용 퍼옥사이드 블렌드
DE102011050035A1 (de) 2011-05-02 2012-11-08 Byk-Chemie Gmbh Emissionsarmes, durch radikalische Polymerisation thermisch härtbares Faser-Matrix-Halbzeug
WO2012150138A1 (en) 2011-05-02 2012-11-08 Elantas Gmbh Low-emission fibre-matrix material curable thermally by radical polymerization
US9133336B2 (en) 2011-05-02 2015-09-15 Byk-Chemie Gmbh Low-emission fibre-matrix material curable thermally by radical polymerization
JP2013221145A (ja) * 2012-04-19 2013-10-28 Nof Corp 架橋剤混合物および太陽電池用封止材組成物
CN105754311A (zh) * 2016-03-16 2016-07-13 无锡新宏泰电器科技股份有限公司 一种bmc聚酯模塑料及其制备方法和应用
WO2022108878A1 (en) * 2020-11-23 2022-05-27 Lyondellbasell Advanced Polymers Inc. Thermoset polyester bmc formula for direct metallized forward lighting reflector

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WO2003055946A8 (de) 2004-05-21

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