Polyurethane interpenetrating network polymer, preparation method and use thereof

A technology of interpenetrating network and polyurethane prepolymer, which is applied in the field of polymer materials, can solve the problems of difficult moisture absorption and curing of isocyanate, poor solvent resistance, long curing time, etc., and achieves the elimination of environmental impact and good protection Light and weather resistance corrosion resistance, the effect of increasing the molecular weight

Inactive Publication Date: 2008-02-20
孝感学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the surface is cured, the diffusion of moisture to the inside is hindered, making it difficult to absorb moisture and cure the remaining isocyanate in the material, and the internal curing time of the system is longer
In addition, vinyl monomers and ether compounds are highly volatile and highly toxic, causing a series of environmental pollution problems during use; epoxy resin materials are dark in color, low in strength, and poor in solvent resistance The acrylic system has the characteristics of good gloss and color retention and outdoor durability, but the volatility and toxicity of acrylic acid cause pollution and bring a lot of inconvenience to the process operation

Method used

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  • Polyurethane interpenetrating network polymer, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] By 2,4-toluene diisocyanate and polyol (castor oil, soybean oil or glycerin, etc.), according to the ratio of NCO / OH=2.25 to react to obtain polyurethane prepolymer, by acrylic acid and epichlorohydrin in the catalyst N, N- Reaction under the condition that dimethylaniline and polymerization inhibitor hydroquinone exist, distillation obtains acrylate-2-hydroxyl-3-chloropropyl ester, gets polyurethane prepolymer and acrylate-2-hydroxyl-3-chloropropyl ester according to The double bond ratio is 2: 1, and the two components are added with 0.2% catalyst dibutyltin dilaurate and 0.5% initiator benzimide peroxide, and cured at 30°C for 1 day, 2 days, and 3 days respectively. Day, 4 days, 5 days, 6 days, 7 days, according to the national material experiment standard, the tensile strength is 4.17Mpa, 6.79Mpa, 6.82Mpa, 5.22Mpa, 7.44Mpa measured by the RG D-5 electronic tensile testing machine , 8.25Mpa, 9.65Mpa. The product can be widely used as the main raw material of elastom...

Embodiment 2

[0021] 2,4-toluene diisocyanate and polyols (castor oil, soybean oil or glycerin, etc.) react according to the ratio of NCO / OH=2.25 to obtain polyurethane prepolymer, by acrylic acid and epichlorohydrin in basic catalyst N, N -Reaction under the condition that dimethylaniline and polymerization inhibitor hydroquinone exist, distill to obtain acrylate-2-hydroxyl-3-chloropropyl ester, take polyurethane prepolymer and acrylate-2-hydroxyl-3-chloropropyl ester Mix according to the double bond ratio of 3:1, add two components by mass of 0.2% catalyst dibutyltin dilaurate and 0.5% initiator benzimide peroxide, and cure at 30°C for 1 day, 2 days, 3 days, 4 days, 5 days, 6 days, 7 days, according to the national material experiment standard, the tensile strength is 6.42Mpa, 8.49Mpa, 9.15Mpa, 9.10Mpa, 8.25 Mpa, 9.38Mpa, 11.58Mpa. The product can be widely used as the main raw material of elastomers, adhesives, plugging materials or insulating materials and the main film-forming substan...

Embodiment 3

[0023]2,4-toluene diisocyanate and polyols (castor oil, soybean oil or glycerin, etc.) react according to the ratio of NCO / OH=2.25 to obtain polyurethane prepolymer, by acrylic acid and epichlorohydrin in basic catalyst N, N -Reaction under the condition that dimethylaniline and polymerization inhibitor hydroquinone exist, distill to obtain acrylate-2-hydroxyl-3-chloropropyl ester, take polyurethane prepolymer and acrylate-2-hydroxyl-3-chloropropyl ester Mix according to the double bond ratio of 4:1, add two components by mass of 0.2% catalyst dibutyltin dilaurate and 0.5% initiator benzimide peroxide, and cure them at 30°C for 7 days, according to the national material The experimental standard is measured by the RG D-5 electronic tensile testing machine, and its tensile strength is 5.43Mpa respectively. The product can be widely used as the main raw material of elastomers, adhesives, plugging materials or insulating materials and the main film-forming substance of coatings. ...

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Abstract

The invention relates to a polyurethane interpenetrating network polymer, which is prepared by interpenetration of acrylic acid-2-hydroxide radical-3 chloropropyl acrylate and polyurethane prepolymer with the effect of activator and catalyst, wherein, the acrylic acid-2-hydroxide radical-3 chloropropyl acrylate is prepared upon distillation after acrylic acid reacts with epoxy chloropropane with the existence of alkalic catalyst and polymerization inhibitor and the polyurethane prepolymer is prepared upon the reaction of polyhydric compound with 2, 4-toluene diisocynate. The invention uses the epoxy chloropropane to modify the acrylic acid, then the acrylic acid interpenetrates with the polyurethane prepolymer to obtain an interpenetrating network material which not only maintains the good gloss retention, weather resisting property and corrosion resistance of acrylic acid system, but also maintains the characteristics of rich and bright color and luster, wear-resistance, oil-proof and corrosion resistance of polyurethane system. In addition, the interpenetrating network material is free from environment pollution caused by the volatilization of the acrylic acid. The invention has simple technique and equipment and is safe without any pollution, thereby being favorable for mass industrial production. The product has a wide application prospect in the aspects of coating, elastomer, etc. and has great potential value in the aspects of chemicals, materials and medicine materials.

Description

technical field [0001] The invention relates to a polyurethane interpenetrating network polymer, a preparation method and application thereof, and belongs to the field of polymer materials. Background technique [0002] Polyurethane (PU-Polyurethane) is the abbreviation of polyurethane, which is an excellent polymer material. It is a polymer made of raw materials such as polyisocyanate and polyether polyol or polyester polyol or small molecule polyol, polyamine or water and other chain extenders or crosslinking agents. By changing the type and composition of raw materials, the shape and performance of the product can be greatly changed, and the final product can be obtained from soft to hard. Compared with other polymer materials, polyurethane has many advantages, such as good mechanical properties of materials, wide range of performance adjustment, and good molding process performance. PU is one of the six most developed synthetic materials in the world. In terms of its ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/02C09D175/04C09J175/04C09K3/10
Inventor 谭晓明石红娥张尖兵王平王友平
Owner 孝感学院
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