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Silicon resin modified unsaturated polyester resin and preparation method thereof

A technology of polyester resin and silicone resin, applied in the field of silicone resin modified unsaturated polyester resin and preparation of the resin, can solve the problems of reducing material strength and heat resistance, increasing production process, increasing production cost, etc., and achieving hardness The effect of maintaining, low cost and low equipment requirements

Active Publication Date: 2015-02-25
ZHAOQING FUTIAN CHEM IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solving the compatibility problem often requires surface modification of the second phase. For example, liquid rubber needs to be grafted with active monomers, and the end group is modified to increase its polarity. Inorganic particles and natural fibers need to be modified with small vinyl molecules. , to improve the interfacial bonding force of the two phases, which not only increases the production process, but also increases the production cost, and the organic solvent used will also cause environmental pollution; on the other hand, the impact strength of the synthesized resin is improved while also Along with the decline of other properties, such as blending with elastomers will reduce the strength and heat resistance of the material, and the introduction of inorganic particles will easily cause the resin to produce color and become opaque

Method used

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  • Silicon resin modified unsaturated polyester resin and preparation method thereof
  • Silicon resin modified unsaturated polyester resin and preparation method thereof
  • Silicon resin modified unsaturated polyester resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0030] Embodiment 2 (0.5wt.% silicone resin modification)

[0031] Keep the molar ratio of maleic anhydride to phthalic anhydride at about 4:5 (maleic anhydride 197g, phthalic anhydride 371.5g); the molar ratio of diethylene glycol, ethylene glycol and propylene glycol is about 1:3:9 (diethylene glycol 42g, ethylene glycol 67g, propylene glycol 262g), the content of silicone resin with silanol groups (commercially available, preferably Dow Corning Z-6018) accounts for 0.5% of the total mass of the resin (6.25g). Stir the silicone resin and three diol monomers mechanically under a nitrogen atmosphere at 180°C and a small amount of catalyst (10 drops of butyl orthotitanate) for more than 3 hours, then cool to room temperature; Under mechanical stirring, react at 165-205°C for 6 hours, then react under vacuum for 2 hours until the acid value of the system is reduced to about 30mgKOH / g, add additives (0.6g triphenyl phosphite and 0.015g hydroquinone) and 370g styrene (pre-added ...

Embodiment 3（1

[0033] Embodiment 3 (1wt.% silicone resin modification)

[0034] Keep the molar ratio of maleic anhydride to phthalic anhydride at about 4:5 (maleic anhydride 197g, phthalic anhydride 371.5g); the molar ratio of diethylene glycol, ethylene glycol and propylene glycol is about 1:3:9 (diethylene glycol 42g, ethylene glycol 67g, propylene glycol 262g), the content of silicone resin with silanol groups (commercially available, preferably Dow Corning Z-6018) accounts for 1% of the total mass of the resin (12.5g. Stir the silicone resin and three diol monomers mechanically under a nitrogen atmosphere at 180°C and a small amount of catalyst for more than 3 hours, then cool to room temperature; add an acid anhydride to the reaction bottle, and under a nitrogen atmosphere and mechanical stirring, React in the range of 165-205°C for 6 hours, then react under vacuum for 2 hours until the acid value of the system is reduced to about 30mgKOH / g, add additives (0.6g triphenyl phosphite and 0...

Embodiment 4（2

[0036] Embodiment 4 (2wt.% silicone resin modification)

[0037] Keep the molar ratio of maleic anhydride to phthalic anhydride at about 4:5 (maleic anhydride 197g, phthalic anhydride 371.5g); the molar ratio of diethylene glycol, ethylene glycol and propylene glycol is about 1:3:9 (diethylene glycol 42g, ethylene glycol 67g, propylene glycol 262g), the content of silicone resin with silanol groups (commercially available, preferably Dow Corning Z-6018) accounts for 2% of the total mass of the resin (25g). Stir the silicone resin and three diol monomers mechanically under a nitrogen atmosphere at 180°C and a small amount of catalyst for more than 3 hours, then cool to room temperature; React in the range of ℃ for 6 hours, then react under vacuum for 2 hours until the acid value of the system is reduced to about 30mgKOH / g, add additives (0.6g triphenyl phosphite and 0.015g hydroquinone) and 370g of styrene (pre-added 0.19mL 1% copper naphthenate solution) was diluted to obtai...

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Abstract

The invention provides a silicon resin modified unsaturated polyester resin, comprising a binary acid or an acid anhydride and a dihydric alcohol, as well as 0.5-5wt% of silicon resin. The invention also provides a synthetic method of the silicon resin modified unsaturated polyester resin. The resin provided by the invention has high impact resistance and high glossiness after being cured, and further has ultraviolet aging resistance; and the preparation method of the resin is low in raw material cost, simple and quick in synthesis process, low in requirement for equipment and easy for the implementation of industrial production.

Description

technical field [0001] The invention belongs to the field of organic chemical industry, and in particular relates to a silicone resin modified unsaturated polyester resin and a method for preparing the resin. Background technique [0002] Unsaturated polyester is a linear polymer produced by polycondensation reaction of saturated and unsaturated dibasic acids (or anhydrides) and diols. Its molecular structure contains non-aromatic unsaturated bonds, which can be passed through appropriate The initiator initiates the crosslinking reaction to become a thermoset plastic. Because unsaturated polyester has the advantages of light weight, high strength, good heat resistance, and easy molding, unsaturated polyester resin products are widely used in many fields such as transportation, construction, interior decoration, and handicrafts. However, unsaturated polyester is brittle and easily broken after curing, and as an engineering material, strength and toughness are two important m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/695C08G63/85
Inventor 符若文许大蔚余桐柏卫福海
Owner ZHAOQING FUTIAN CHEM IND
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