Styrene unsaturated polyester

Commonly used monomers for UV curing include acrylates (7), styrene/unsaturated polyesters (8,9), and thiol-ene compositions (10-12). Currently, acrylate-functional systems constitute a major share of the UV curable polymers market, mainly due to their rapid curing via free radical chain polymerization. [Pg.150]

Solomon (3, h, 5.) reported that various clays inhibited or retarded free radical reactions such as thermal and peroxide-initiated polymerization of methyl methacrylate and styrene, peroxide-initiated styrene-unsaturated polyester copolymerization, as well as sulfur vulcanization of styrene-butadiene copolymer rubber. The proposed mechanism for inhibition involved deactivation of free radicals by a one-electron transfer to octahedral aluminum sites on the clay, resulting in a conversion of the free radical, i.e. catalyst radical or chain radical, to a cation which is inactive in these radical initiated and/or propagated reactions. [Pg.471]

The most widely used graft copolymer is the styrene-unsaturated polyester copolymer (Equation 7.35). This copolymer, which is usually reinforced by fibrous glass, is prepared by the free radical chain polymerization of a styrene solution of unsaturated polyester. [Pg.216]

Oligomeric benzil ketals (DTGPA), prepared by reaction of 2,2-dimethoxy-2-phenyl-acetophenone (DMPA) with triethyleneglycol, in the presence of p-toluen-sulphonic acid, are reported [88] to be efficient in the UV curing of styrene/ unsaturated polyester formulations giving rise to coatings with very low odour. [Pg.167]

Figure 4. Effect of dose rate on polymerization temperature of Norsodyne styrene-unsaturated polyester resin.

Two different styrene-unsaturated polyester resins were involved in this study (1) Norsodyne resin (Norsolor, France) and (2) a research flexible formulation based... [Pg.225]

Huang, Y.J. and Chen, L.D. 1997. Effects of chemical composition and structure of unsaturated polyester resins on the miscibility, sample morphology and mechanical properties of styrene/unsaturated polyester/low-profile additive ternary systems. 1. Miscibility and cured sample morphology. Polymer 39 6631-6641. [Pg.345]

Proposal of Ohama s styrene-unsaturated polyester ratio rule (law) in the compressive strength prediction for polyester concrete by using styrene-unsaturated polyester ratio or unsaturated polyester-styrene ratio [36]... [Pg.5]

Uses Med.-temp. initiator for polymerization of vinyl monomers and the curing of styrene-unsaturated polyester resin compositions crosslinking agent for unsat. polyesters catalyst in premix polyester BMC, SMC Manuf./Distiib. Akzo Nobel http //www.akzonobel.com] Atofina http //www.atofinachemicals.com] Aztec Peroxides Norac http //www.norac.com Trade Name Synonyms Aztec TBPEH t[Aztec Peroxides] Aztec TBPEH-30-AL t[Aztec Peroxides] Esperox 28 [Crompton/Olefins Styrenics] Luperox 26 [Atofina SA http //www.atofina.com] Atofina http //www.atofinachemicals.com]] Perbutyl O t[NOF http //www.nof.co.jp]... [Pg.638]

The time-dependent evolution of the polymerisation and copolymerisation reactions of styrene/unsaturated polyester resin was characterised using optical levitation with Raman spectroscopy (135). The n-butyllithium-initiated anionic polymerisation of styrene in ethylbenzene was measured using Raman spectroscopy (214). [Pg.22]

The addition of certain high Tg polymeric additives tend to reduce shrinkage and actually undergo phase separation in a similar manner as observed in styrene-unsaturated polyester low-profile molding resin technologies (5). [Pg.372]

Many compounds can fit the definition of Iree-radial photoinitiators. They can be peroxides, disulfides, azo compounds, ketones, aldehydes and other. One example is a diphenyldisulfide that has been utilized in photocurable systems based on styrene-unsaturated polyester compositions ... [Pg.27]

Acceptable bonds have been obtained between polyethylene surfaces with polar adhesives such as epoxies (anhydride- and amine-cured and two-component modified epoxies) and solvent cements containing synthetic rubber or phenolic resin. Other adhesives recommended include styrene-unsaturated polyester and solvent-type nitrile-phenolic. [Pg.147]

F. G. Hutchinson, R. G. C. Henbest, and M. K. Leggett, Polymeric Shaped Articles, U.S. Pat. 4,062,826 (1977). SIN s, grafted. Plastic polyurethanes based on 4 4 -diphenyl-methane diisocyanate. Styrene-unsaturated polyester. Gel polymerization. Shaping of partly gel-polymerized articles. [Pg.250]

An unsaturated polyester resin has two primary components, a polyester containing polymerisable double bonds and a copolymerisable solvent monomer, of which the most commonly used is styrene. Unsaturated polyesters are made by esterification of glycols with mixtures of maleic anhydride and saturated diacids (Structure 9.1). The term alkyd is used to describe low-molecular-weight polyesters, where molecular weight is broadly... [Pg.427]

Other systems include styrene/unsaturated polyesters and thiol-ene compositions These will not be discussed here. [Pg.15]

An internal-reflection prism cell has been used for reaction-kinetics measurement of styrene-unsaturated polyester resins at elevated curing temperatures and pressures [133]. Other researchers have estimated the cross-linking efficiency in methyl methacrylate-ethylene glycol dimethacrylate copolymer networks by laser Raman spectroscopy [134], while recently... [Pg.84]

Scheme 12 Pathway for the crosslinking polymerization of styrene-unsaturated polyester systems.

The company, an affiliate of Sinopec, has 21 400 employees and owns 55 plants. Its major products include petroleum processing products, polystyrene, PP, propylene glycol, ethylene glycol, EO, benzene, styrene, unsaturated polyester resin, ammonia, urea, alkylbenzene, alkylbenzene-sulphonate, alkylbenzene sodium sulphonate, heavy alkylbenzene, washing powder, plasticizers, printing and dyeing auxiliaries. The company has 110 000 tonnes/year of PP capacity and 10 000 tonnes/ year of polystyrene capacity. It plans to expand its refining capacity 24% by the end of 2004 to a total of 13 million tonnes/year. [Pg.97]

Preparation and testing of composites from a styrene/ unsaturated polyester thermoset matrix and wood flours... [Pg.65]

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