Modified unsaturated polyester resin composition and preparation method thereof

Abstract

The invention belongs to the technical field of unsaturated polyester resin, and particularly relates to a modified unsaturated polyester composition and a preparation method thereof. The modified unsaturated polyester composition is prepared from, by weight, 250-400 parts of epoxy resin, 100-150 parts of acrylic acid, 3-9 parts of triethyl benzyl ammonium chloride, 0.2-0.9 part of hydroquinone and 190-250 parts of hydroxyethyl acrylate, wherein the epoxy resin is prepared from pentaerythritol, glycerol, triethylene glycol and epoxy chloropropane through ring opening and ring closing. The unsaturated polyester resin disclosed by the invention does not contain styrene, and is low in odor, good in environmental protection property, high in curing speed and high in mechanical strength after being cured.

Description

technical field

[0001] The invention belongs to the technical field of unsaturated polyester resins, and relates to a modified unsaturated polyester resin composition and a preparation method thereof. Background technique

[0002] Expanded polystyrene, referred to as EPS, has the characteristics of low relative density, low thermal conductivity, low water absorption, shock and vibration resistance, heat insulation, sound insulation, moisture resistance, shock absorption, and excellent dielectric properties, and is widely used in mechanical equipment , instrumentation, household appliances, handicrafts and other shockproof packaging materials for fragile and valuable products, as well as fast food packaging. However, the mechanical strength of EPS is poor, and it is necessary to use resin to form a cured protective layer on the surface. The existing resin protective layer has high brittleness and insufficient flexibility, or contains a large amount of benzene ring structure ...

Examples

Embodiment 1

[0038] Prepare the following raw materials, 270 parts of epoxy resin, 125 parts of acrylic acid, 5 parts of triethylbenzyl ammonium chloride, 0.6 part of hydroquinone and 200 parts of hydroxyethyl acrylate,

[0039] Mix epoxy resin, hydroquinone, and triethylbenzylammonium chloride, raise the temperature to 81°C, add acrylic acid dropwise within 2 hours under stirring; Below 10mgKOH / g, lower the temperature to 78°C, add hydroxyethyl acrylate, stir for 1 hour, and obtain modified unsaturated polyester resin composition 1.

Embodiment 2

[0041] Prepare the following raw materials, 314 parts of epoxy resin, 115 parts of acrylic acid, 6 parts of triethylbenzyl ammonium chloride, 0.5 part of hydroquinone and 223 parts of hydroxyethyl acrylate,

[0042] Mix epoxy resin, hydroquinone and triethylbenzylammonium chloride, heat up to 78°C, add acrylic acid dropwise within 2 hours under stirring; Below 10mgKOH / g, lower the temperature to 80°C, add hydroxyethyl acrylate, and stir for 50min to obtain modified unsaturated polyester resin composition 2.

Embodiment 3

[0044] Prepare the following raw materials, 330 parts of epoxy resin, 127 parts of acrylic acid, 5.5 parts of triethylbenzyl ammonium chloride, 0.5 part of hydroquinone and 222 parts of hydroxyethyl acrylate,

[0045] Mix epoxy resin, hydroquinone, and triethylbenzylammonium chloride, raise the temperature to 81°C, add acrylic acid dropwise within 2 hours under stirring; Below 10 mgKOH / g, lower the temperature to 82°C, add hydroxyethyl acrylate, and stir for 1.5 hours to obtain modified unsaturated polyester resin composition 3.

technical field

[0001] The invention belongs to the technical field of unsaturated polyester resins, and relates to a modified unsaturated polyester resin composition and a preparation method thereof. Background technique

[0002] Expanded polystyrene, referred to as EPS, has the characteristics of low relative density, low thermal conductivity, low water absorption, shock and vibration resistance, heat insulation, sound insulation, moisture resistance, shock absorption, and excellent dielectric properties, and is widely used in mechanical equipment , instrumentation, household appliances, handicrafts and other shockproof packaging materials for fragile and valuable products, as well as fast food packaging. However, the mechanical strength of EPS is poor, and it is necessary to use resin to form a cured protective layer on the surface. The existing resin protective layer has high brittleness and insufficient flexibility, or contains a large amount of benzene ring structure ...

Examples

Embodiment 1

[0038] Prepare the following raw materials, 270 parts of epoxy resin, 125 parts of acrylic acid, 5 parts of triethylbenzyl ammonium chloride, 0.6 part of hydroquinone and 200 parts of hydroxyethyl acrylate,

[0039] Mix epoxy resin, hydroquinone, and triethylbenzylammonium chloride, raise the temperature to 81°C, add acrylic acid dropwise within 2 hours under stirring; Below 10mgKOH / g, lower the temperature to 78°C, add hydroxyethyl acrylate, stir for 1 hour, and obtain modified unsaturated polyester resin composition 1.

Embodiment 2

[0041] Prepare the following raw materials, 314 parts of epoxy resin, 115 parts of acrylic acid, 6 parts of triethylbenzyl ammonium chloride, 0.5 part of hydroquinone and 223 parts of hydroxyethyl acrylate,

[0042] Mix epoxy resin, hydroquinone and triethylbenzylammonium chloride, heat up to 78°C, add acrylic acid dropwise within 2 hours under stirring; Below 10mgKOH / g, lower the temperature to 80°C, add hydroxyethyl acrylate, and stir for 50min to obtain modified unsaturated polyester resin composition 2.

Embodiment 3

[0044] Prepare the following raw materials, 330 parts of epoxy resin, 127 parts of acrylic acid, 5.5 parts of triethylbenzyl ammonium chloride, 0.5 part of hydroquinone and 222 parts of hydroxyethyl acrylate,

[0045] Mix epoxy resin, hydroquinone, and triethylbenzylammonium chloride, raise the temperature to 81°C, add acrylic acid dropwise within 2 hours under stirring; Below 10 mgKOH / g, lower the temperature to 82°C, add hydroxyethyl acrylate, and stir for 1.5 hours to obtain modified unsaturated polyester resin composition 3.

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