High tensile resin-based traffic guardrail structure composite material dedicated resin

A technology of guardrail structure and composite materials, which is applied in the field of roads and bridges, can solve the problems of inability to solve the contradiction between resin strength and elongation, low crosslinking density of unsaturated polyester, low tensile strength and hardness, etc., and achieve outstanding anti-corrosion Effects of impact toughness, increased flexibility, and improved performance

Inactive Publication Date: 2009-12-30
周志亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the matrix resin of the composite barrier is made of polymer materials, such as unsaturated resin, reinforcing agent, a small amount of curing agent, release agent and colorant, and the filler is fully kneaded into a barrier composed of adhesive materials. It has a certain impact strength, is not easy to wear, is exposed to wind, sun and rain, does not rust, does not change shape, and has the characteristics of quick maintenance, but its general-purpose unsaturated polyester has low cross-linking density, tensile strength and hardness. Both are low, its elongation at break is low, its impact performance is poor, and it cannot solve the contradiction between resin strength and elongation, which limits its application as a composite guardrail.
At present, according to the different requirements of the two new types of composite material guardrails for urban roads and expressways, the material design and structural design of the guardrails should be carried out. On the basis of taking into account the inherent characteristics of polymer composite materials, the design should meet both the use requirements and the process requirements. A brand-new low-cost highway guardrail has not really been effectively solved and more related literature reports

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0020] The preparation of flexible resin is by introducing longer aliphatic chains into the molecular structure of unsaturated polyester or adding diols containing ether bonds, such as diethylene glycol adipate, so that the distance between unsaturated bonds in the molecular chain is drawn Open, synthesize a new type of unsaturated polyester, to obtain higher elongation at break; % of diisocyanate monomer reacts with unsaturated polyester to prepare polyurethane modified unsaturated polyester. A large number of hydrogen bonds are formed between the modified resin molecules, the force between the molecules is enhanced, and the resin obtains at least 100% elongation at break.

[0021] According to the characteristics of flexible resin, which is flexible but poor in strength, and its tensile strength is generally only about 5MPa, the method of adding flexible resin to saturated polyester resin to make high-toughness resin can be used to improve the strength of unsaturated polyest...

Embodiment 1

[0024] Add 72 kg of 1,2-propylene glycol and 27 kg of polyethylene glycol to a 500-liter stainless steel reactor equipped with an electric stirrer, an electric heater, a condenser, an oil-water separator, a thermometer, and an inert gas device. -800, 154 kg of maleic anhydride, 98 kg of phthalic anhydride. Slowly heat up until the reactant melts and becomes translucent, start stirring, and pass through nitrogen protection, continue to heat up to the reflux of the reactant, start to let the reflux return to the bottle overnight, and maintain this temperature for about 1 hour. Continue to heat up. The polyesterification polycondensation reaction starts at 180-190°C, and the reaction temperature does not rise any more when water comes out. After maintaining the reaction for 30 minutes, take water from the oil-water separator and continue to raise the temperature. The heating rate during the reaction process can be controlled by the take-out rate of the condensate in the oil-wate...

Embodiment 2

[0027] Add 83 kg of 1,2-propylene glycol and 36 kg of polyethylene glycol to a 500-liter stainless steel reactor equipped with an electric stirrer, an electric heater, a condenser, an oil-water separator, a thermometer, and an inert gas device. -2000, 131 kg of maleic anhydride, 102 kg of phthalic anhydride. Slowly heat up until the reactant melts and becomes translucent, start stirring, and pass through nitrogen protection, continue to heat up to the reflux of the reactant, start to let the reflux return to the bottle overnight, and maintain this temperature for about 1 hour. Continue to heat up. At 180-190°C, the esterification reaction starts, and water comes out, and the reaction temperature does not rise any more. After maintaining the reaction for 30 minutes, take water from the oil-water separator to continue to raise the temperature. The heating rate during the reaction process can be controlled by the take-out rate of the condensate in the oil-water separator. Take ...

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Abstract

The invention proposes a high tensile resin-based traffic guardrail structure composite material dedicated resin, aiming to providing a high tensile resin-based traffic guardrail structure composite material dedicated resin featuring high yielding elongation, excellent tenacity, high intensity, satisfaction of collision, anti-ageing and installation properties. The invention comprises products obtained by the following chemical reaction: (A) high tenacity resin synthesized by adding 1000 parts of flexible resin to 1000 parts of unsaturated polyester base stock; (B) a novel unsaturated polyester synthesized by introducing a longer aliphatic chain or adding divalent alcohol containing ether linkage; (C) polyurethane modified unsaturated polyester prepared by adding a certain amount of diisocyanate monomer to react with unsaturated polyester, the products (A), (B) and (C) are mixed following a certain proportion to combine the products into modified and unsaturated polyester tenacity base material, then 2-500 parts of filler is fully kneaded to prepare dedicated resin. The resin of the invention can be used to produce low-cost and high-intensity traffic guardrail.

Description

Background technique [0001] The invention relates to a kind of special resin mainly used for guardrail structure composite materials on highways and bridges, especially highways. The special resin for barriers involved in the description of the present invention is a composite material barrier product mainly on highways, but it can be considered that the barrier materials involved in the description of the present invention can also be applied to barrier products for various purposes , such as: railway / highway fence, farm and field fence, animal fence, various sports field fence equipment, swimming pool safety fence, pipeline and tunnel fence equipment, snow fence, signage, pipeline and tunnel fence equipment, post box installation Equipment, barriers for security purposes, chain barriers, etc. Background technique [0002] As a very important safety facility, highway guardrails are a prerequisite for giving full play to the effectiveness of guardrails. The reasonable sett...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/06C08L75/06C08G18/68C08G18/48C08G63/676C08F283/01
Inventor 周志亮
Owner 周志亮
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