Polyurethane modified unsaturated polyester resin composition and preparation method thereof

A technology of polyurethane modification and polyester resin, applied in the field of polyurethane modified unsaturated polyester resin composition and preparation thereof, can solve the problems of unsatisfactory impact performance, poor impact resistance, easy cracking, etc., and achieves improvement and The effect of increasing comprehensive properties, high adhesion, and high tensile strength

Inactive Publication Date: 2012-06-20
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Based on the above prior art, the cross-linked structure formed by unsaturated polyester resin has problems such as poor toughness, easy cracking after curing, and unsatisfactory impact performance when used in some specific occasions. The technical problem solved by the present invention It uses the characteristics of high toughness, high impact and high wear resistance of polyurethane elastomer materials to modify unsaturated polyester resins, mainly using single-component heat-curable polyurethane elastomer components and unsaturated polyester Components and other small amounts of additives are mixed to form a polyurethane modified unsaturated polyester resin composition, which can form a composite of polyurethane macromolecules and unsaturated polyester macromolecules with an interpenetrating network structure after being cured by heat , to improve the existing unsaturated polyester resin materials such as poor toughness, poor impact resistance, easy cracking after curing, etc., the composition can meet the requirements of rapid curing and continuous production process

Method used

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  • Polyurethane modified unsaturated polyester resin composition and preparation method thereof
  • Polyurethane modified unsaturated polyester resin composition and preparation method thereof
  • Polyurethane modified unsaturated polyester resin composition and preparation method thereof

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specific Embodiment approach 1

[0038] Implement the preparation method of a kind of polyurethane modified unsaturated polyester resin composition described in the present invention, the feeding amount is all calculated by mass fraction, preparation process conditions and process are shown in the attached figure 1 :

[0039] 1. Preparation of one-component end-capped polyurethane prepolymer

[0040] ① Synthesis of polyurethane prepolymer

[0041] Add 100 parts of polyether polyol N210 and 100 parts of polyether polyol N220 into the reactor according to the mass fraction, heat up to 125-135°C, keep stirring, keep the vacuum at 0.08-0.09 Mpa, and vacuum dehydrate for 2 hours , placed to lower the temperature to about 40°C, then add 64 parts of toluene diisocyanate (TDI-80), raise the temperature to 80±2°C and keep it warm for 2.5 hours to prepare a polyurethane preform with a free isocyanate group-NCO content of 7%. Polymer. The reaction scheme is as follows:

[0042]

[0043] ② End capping of polyureth...

specific Embodiment approach 2

[0052] (The dosages mentioned below are all mass fractions)

[0053] 1. Preparation of one-component end-capped polyurethane prepolymer

[0054] ①Synthesis of polyurethane prepolymer

[0055] Add 100 parts of polyether polyol N210 and 100 parts of polyether polyol N220 into the reactor according to the mass fraction, heat up to 125-135°C, keep stirring, keep the vacuum at 0.08 Mpa, vacuumize and dehydrate for 2 hours, and place Lower the temperature to about 40°C, then add 85 parts of toluene diisocyanate (TDI-80), raise the temperature to 80°C and keep it warm for 2.5 hours to prepare a polyurethane prepolymer with a free-NCO content of 10%. The reaction scheme is as follows:

[0056]

[0057] ②Encapping of polyurethane prepolymer

[0058] Add organic composite metal catalyst BiCAT to step ① reactor ? 1.2 parts of 3484 (M) catalyst, stir and heat up to 80°C, then take 62 parts of end-capping agent methyl ethyl ketone oxime, and add it dropwise to the above polyurethane...

specific Embodiment approach 3

[0067] (The dosages mentioned below are all mass fractions)

[0068] 1. Preparation of one-component end-capped polyurethane prepolymer

[0069] ①Synthesis of polyurethane prepolymer

[0070] Add 100 parts of polyether polyol N210 and 100 parts of polyether polyol N220 into the reactor by mass, heat up to 125-135°C, keep stirring, keep the vacuum at 0.08 Mpa, vacuumize and dehydrate for 2 hours, and let it stand for The temperature is lowered to about 40°C, and then 78 parts of toluene diisocyanate (TDI-80) is added, and the temperature is raised to 80°C for 2.5 hours, and the polyurethane prepolymer with a free-NCO content of 9% is obtained. The reaction scheme is as follows:

[0071]

[0072] ②Encapping of polyurethane prepolymer

[0073] Add organic composite metal catalyst BiCAT to step ① reactor ? 1.5 parts of 3484 (M) catalyst, stir and heat up to 80°C, then take 59 parts of ethylene glycol monoethyl ether as an end-capping agent, and add it dropwise to the above-...

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Abstract

The invention relates to a polyurethane modified unsaturated polyester resin composition and a preparation method thereof. The polyurethane modified unsaturated polyester resin composition is prepared through taking 100 parts of an unsaturated polyester resin, adding 13-25 parts of a monocomponent capped polyurethane prepolymer, adding 0.3-0.5 parts of an antioxidant, 0.3-0.5 parts of an antioxidation assistant, 0.3-0.8 parts of a thermal stabilizer, 0.3-0.5 parts of an ultraviolet ray absorbent, 0.3-0.6 parts of a mildew preventive and 0.2-0.5 parts of a defoamer, putting above materials into a mixed reactor, and stirring and uniformly mixing them at normal temperature. The composition of the invention, which can be cured to form a composition with interpenetrating networks of polyurethane macromolucules and unsaturated polyester macromolucules after heat-reacting, solves problems of bad toughness, bad impact resistance, easy cracking after curing and the like of present unsaturated polyester materials, so the composition of the invention can be applied to the building industry and the like as a thermocuring coating and an adhesive.

Description

technical field [0001] The invention relates to a polyurethane modified unsaturated polyester resin composition and a preparation method thereof, in particular to a modification of an unsaturated polyester resin by a single-component thermosetting polyurethane component and a preparation method thereof. Background technique [0002] Unsaturated polyester resin (UPR) is a thermosetting resin, which is a polycondensation product of unsaturated dibasic acid, saturated dibasic acid and polyol. It can be used as a thermosetting plastic by initiating crosslinking reaction with an appropriate initiator. The production process is simple. , The raw material is easy to get, has excellent characteristics, and is widely used in chemical industry, machinery, electrical appliances, transportation and construction and other related industries, especially glass fiber reinforced composite materials are widely used in the FRP industry. Its cross-network structure makes its composite products ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L75/08C08K5/00C08K5/134C08K5/521C08K5/098C08G18/80C08G18/32C08F283/01C08J3/24
Inventor 李万捷韩念琛李晓云郑玉刚
Owner TAIYUAN UNIV OF TECH
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