Thixotropic unsaturated polyester resins of prolonged durability with modified smectites added

2007

Macro Materials & Eng

The paper deals with the synthesis of amine modifiers for unsaturated polyester resins obtained from N‐phenyl‐2‐amineethanol and 2,4‐dichloro‐6‐methoxy‐1,3,5‐triazine (modifier A), 2‐chloro‐4,6‐dimethoxy‐1,3,5‐triazine (modifier B) or with cyanuric chloride (modifier C). Properties of amine modifiers for unsaturated polyester resins are presented. The modifiers were incorporated into resins at the polycondensation stage.magnified image

Section: Resultsmentioning

confidence: 99%

Amine Modifiers with an s‐Triazine Ring for Unsaturated Polyester Resins, 2

2007

Macro Materials & Eng

“…In order to improve the stability of the resins, 0.3 wt.‐% of ammonium salt, namely benzyltriethylammonium chloride is added to the resin 19. The stability of the thus stabilized resins is measured again at 70 °C.…”

Section: Resultsmentioning

confidence: 99%

Amine Modifiers with an s‐Triazine Ring for Unsaturated Polyester Resins, 1

2006

Macro Materials & Eng

Summary: Synthesis and properties of amine modifiers for unsaturated polyester resins are presented. The modifiers were obtained by reacting 3‐azapentan‐1,5‐diol (diethanoloamine) with 2,4‐dichloro‐6‐methoxy‐1,3,5‐triazine, 2‐chloro‐4,6‐dimethoxy‐1,3,5‐triazine or with cyanuric chloride. They were incorporated into the structure of typical unsaturated polyester resins in the polycondensation stage, i.e. prior to dilution with styrene, in the amount of 0.25 through to 2.0 wt.‐%. The effect of the modifier presence on the curing behavior of the resulting resins is discussed.Gelation times for unsaturated polyester resins modified with modifiers A, B, and C are shown with the curing system consisting of peroxide initiator and (▪): 0.10 cm3, (•): 0.15 cm3, (▴): 0.25 cm3, and (▾): 0.50 cm3 of cobalt(II) octenate solution per 25 g of resin.imageGelation times for unsaturated polyester resins modified with modifiers A, B, and C are shown with the curing system consisting of peroxide initiator and (▪): 0.10 cm3, (•): 0.15 cm3, (▴): 0.25 cm3, and (▾): 0.50 cm3 of cobalt(II) octenate solution per 25 g of resin.

“…The stability of UP resin can be improved by using quaternary ammonium salt stabilizers. 31,32 The stability of resins at 70 C (Table V, columns 6 and 7) improved in the presence of the ammonium 0.3 wt % benzyltrimethylammonium chloride stabilizer, but to the extent again depending on the amount of aromatic amine modifier built into resin. Again, the stability of resins containing modifier built into polyester chain and the stabilizer differed depending on the amount of the modifier.…”

Section: Gelation Time For Modified Up Resinsmentioning

confidence: 97%

Hydroxyalkyl derivatives of phenyldiamine as modifiers for unsaturated polyester resins. II. derivatives of phenyl‐1,3‐diamine

J of Applied Polymer Sci

2012

The results are presented on the synthesis of new modifiers and on functioning of these modifiers in unsaturated polyester (UP) resins. The modifiers were obtained by reacting ethylene oxide or propylene oxide with phenyl-1,3diamine. The effect of the modifiers and cobalt accelerator on the reactivity of resins was studied. When used in the amount of up to 1.50 wt %, the amines substantially (several times) reduced the gelation time of modified UPs. The reactivity of resins, however, improved in expense of their stability.