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Polyester curatives.

ABCO INDUSTRIES, INC.

Abcure S-40-25 sprayable 40% emulsion of BPO in water recommended as an alternative to MEKP in applications that can tolerare introduction of water with the catalyst. Can be stored at room temperature in large quantities and does not require yellow label for transportation.

AKRO NOBEL CHEMICALS INC.

NL-accelerators--cobalt organometallic complexes--promote unsaturated polyester resins. Other metal complexes offered for specialty uses in polyester systems requiring ambient and elevated-temperature cures.

Organic peroxides for curing polyester resins covering a range of temperatures and processing conditions. Ketone peroxides and BPO granular, paste, and emulsion grades. Peroxyesters and peroxyketals for SMC and BMC. Also peroxides for high-temperature molding and a medium-range di&iexel;êfunctional peroxide. Photo-initiators available for uv curing of polyesters.

Other products include di-t-butyl peroxide, t-butyl hydroperoxide. peroxydicarbonates, and specialty organic peroxides.

AVECIA

Alkyl aniline promoters for polyester resins promote ambient and low temperature decomposition of peroxide catalysts, allowing for better control of resin curing and gell times.

CATALYST SYSTEMS, INC.

Water-Wet benzoyl peroxide in paste and granular formulations. Granulars offered in 70%, 75%, and 78% concentration. Dry BPO greater than 97% also available. Standard paste products from 25-55% are smooth, nonseparating creams (pigmented or unpigmented) for marine repair and polyester or acrylic adhesives. Polyester auto body putty, specialty formulations available. Low-viscosity, pourable, pumpable, sprayable emulsions at 40% by weight for use where granular or high-viscosity pastes are not applicable. Lower concentrations on request.

Mnono-Pak custom additive packages for elevated-temperature molding of reinforced plastics may contain catalysts, mold releases, thickeners, and pigments. Preweighed mixtures of additives supplied in a soluble package that can be dropped unopened into the resin mix, eliminating preweighing, saving labor, simplifying inventories, and eliminating rejects caused by weighing errors involving critical additives.

Specializes in custom formulated pastes to meet requirements in assay, viscosity, pigmentation, and stability where mix ratios dictate peroxide activity level.

CROMPTON CORP. OLEFINS & STYRENICS

Organic peroxide initiators for polyesters include ketone peroxides, peroxyester and peroxyketals for SMC, BMC, and TMC; and USP-90PD peroxyketal, which offers enhanced efficiency.

DEGUSSA INITIATIORS LLC

Organic peroxide initiators include dialkyl peroxides, diacyl peroxides, peroxydicarbonates, alkyl-hydroperoxides, peroxyesters, peroxyketals, and custom blends.

Peroxyesters include t-butyl peracetate, t-butyl peroxybenzoate, t-butyl peroxypivalate, t-butyl peroctoate, t-butyl peroxydicarbonates along with t-amyl analogs for each product.

Diacyl peroxides include several grades of benzoyl peroxide that are in water wetted granular form and powdered form in various phthalates. Lauryl peroxide also available. Dialkyl peroxides include di-t-butyl peroxide and various grades of dicumyl peroxide. Range of liquid and solid peroxydicarbonates available.

Alkyl hydroperoxides include cumene hydroperoxide and t-butyl hydroperoxides. Cyclohexane type peroxyketals available. Specializes in custom blends and packaging, and return-for-reuse containers for liquid and solid initiators.

Organometallic promoters for polyesters include Cobalt/potassium complex, which can extend more costly cobalt promoters and reduce color; Nuxtra cobalt-12%, a standard cobalt promoter; which helps control speed of gel promotion and prevents gel time drift.

DUPONT CO. CHEMICALS DEPT.

Vazo 52, 64, 67, and 88 nitrile-based compounds can be used in polymerization of unsaturated polyesters.

EASTMAN CHEMICAL CO.

Ethyl acetoacetate, methyl acetoacetate, dimethyl acetoacetamide, monomethyl acetoacetamide, and acetoacetanilide are low-color copromoters for room-temperature cure of unsaturated polyesters.

HERCULES INC.

Di-Cup dicumyl peroxide and Vul-Cup a.a'-bis (tertiary butylperoxy) diisopropylbenzene used to cure unsaturated polyester at temperatures over 250 F and with other peroxides to improve performance.

NORAC CO., INC.

Room-temperature-cure initiators, include organic peroxides such as MEKP, AAP and BPO. Higher-temperature peroxyesters such as TBPB and TBPO offered for SMC/BMC.

OMG AMERICAS METAL ORGANICS

Promoters for polyesters include cobalt octoate, cobalt naphthenate, and other cobalt compounds. Also potassium octoate, Poly-Cure 503 (containing cobalt plus proprietary synergists), and manganese-based compounds.
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Title Annotation:Product Lines Reviewed
Publication:Plastics Technology
Date:Oct 1, 2003
Words:602
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