Sheet molding compound, fiber reinforced composite material and preparation method and application thereof

A technology of sheet molding compound and composite material, which is applied in the field of sheet molding compound, fiber-reinforced composite material and its preparation, can solve problems such as environmental protection, and achieve the effects of simple process, excellent environmental protection performance and improved environmental protection.

Inactive Publication Date: 2020-05-12
南京聚发新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: To provide a sheet molding compound, a fiber-reinforced composite material and its preparation method and applica

Method used

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  • Sheet molding compound, fiber reinforced composite material and preparation method and application thereof

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Example Embodiment

[0062] Example 1

[0063] The first step: synthesis of hydroxyl-terminated polyurethane prepolymer: 400g of polypropylene oxide ether glycol with molecular weight of 400g / mol is heated to 120°C and vacuumed for 1 hour, cooled to 90°C, according to hydroxyl and isocyanate groups Add 125 g (0.5 mol) of 4,4-diphenylmethane diisocyanate (MDI) in a molar ratio of 2:1, and react for 1 hour to obtain a hydroxyl-terminated polyurethane prepolymer.

[0064] Step 2: Heat the prepolymer in the first step to 140°C, add 98g (1mol) maleic anhydride and 1.87g (0.3%) methyl hydrogen according to the molar ratio of hydroxyl group and acid anhydride group of 1:1 Quinone polymerization inhibitor, carry out the ring-opening esterification reaction of the hydroxyl group to the acid anhydride, and continue the reaction for 1 hour to introduce the double bond and the carboxyl functional group into the molecular chain of the polyurethane prepolymer synthesized in the first step.

[0065] The third step: ad...

Example Embodiment

[0079] Example 2

[0080] The first step: synthesis of hydroxyl-terminated polyurethane prepolymer: heat 1000g of polybutylene adipate with a molecular weight of 1000g / mol to 100°C and vacuum for 2 hours, cooling to 60°C, according to hydroxyl and isocyanate groups Add 133g (1mol-NCO group) polymerized diphenylmethane diisocyanate (polymeric MDI) at a molar ratio of 2:1, and react for 4 hours to obtain a hydroxyl-terminated polyurethane prepolymer.

[0081] The second step: increase the temperature of the prepolymer in the first step to 90°C, and add 166g (1mol) methyltetrahydrophthalic anhydride, 12.99g (1%) trihydroxide at a ratio of 1:1 molar ratio of hydroxyl group to acid anhydride group. Phenyl phosphine catalyst and 1.3 g (0.1%) o-methyl hydroquinone polymerization inhibitor were used to carry out the ring-opening esterification reaction of hydroxyl to acid anhydride, and the reaction was continued for 4 hours to introduce double bonds and carboxyl functional groups into the...

Example Embodiment

[0096] Example 3

[0097] The first step: synthesis of hydroxyl-terminated polyurethane prepolymer: heat 2000g of polyphthalic anhydride glycol ester with a molecular weight of 2000g / mol to 90°C and vacuum for 2 hours, cooling to 80°C, according to the moles of hydroxyl and isocyanate groups Add 88g (0.5mol) of toluene diisocyanate (TDI) in a ratio of 2:1 and react for 2 hours to obtain a hydroxyl-terminated polyurethane prepolymer.

[0098] The second step: increase the temperature of the prepolymer in the first step to 120℃, add 178g (1mol) methyl nadic anhydride, 6.79g (0.3%) three Ethylamine catalyst and 4.53g (0.2%) o-methyl hydroquinone polymerization inhibitor, carry out the ring-opening esterification reaction of hydroxyl to acid anhydride, and continue the reaction for 2 hours to introduce double bond and carboxyl functional group into the first On the molecular chain of the polyurethane prepolymer synthesized in the step.

[0099] The third step: add 1220g (35%) of trimet...

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Abstract

The invention discloses a preparation method of a fiber reinforced composite material, and belongs to the field of polymer synthesis and fiber reinforced composite material preparation. The method comprises the following steps: 1, synthesizing a hydroxyl-terminated polyurethane prepolymer; 2, introducing functional groups containing double bonds, carboxyl and the like; 3, adding a diluent to complete resin preparation; 4, preparing sheets according to a formula; and 5, pressing the sheet into a finished product at high temperature on mold pressing equipment. Compared with the prior art, the invention has the following advantages: the pressing process of the resin, the sheet and the composite material finished product is very environment-friendly, and no unpleasant smell is generated; any equipment does not need to be added and the original process is not changed; and the performance of the final composite material product is obviously improved compared with performance of traditional unsaturated resin.

Description

technical field [0001] The invention belongs to the field of polymer synthesis and fiber-reinforced composite material preparation, in particular to a sheet molding compound, a fiber-reinforced composite material and a preparation method and application thereof. Background technique [0002] Molding process is an advanced composite molding method. When used, the reactive sheet molding compound (commonly known as "sheet") prepared by resin and fiber through a certain process is placed in a mold heated to a certain temperature and heated. Pressing, the sheet undergoes high-temperature melting and solidification in the mold, and the desired product can be obtained after demoulding. This process has the characteristics of low production cost, high efficiency, complex shapes and excellent mechanical properties. It has been widely used in the fields of automobiles, medical and health care, sporting goods, automobiles, construction, anti-corrosion and aerospace. [0003] The sheet...

Claims

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Application Information

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IPC IPC(8): C08L75/14C08L25/06C08L35/02C08K5/098C08K3/22C08K7/14C08K13/04C08F283/00C08F222/14
CPCC08F283/00C08K2003/222C08K2003/2227C08L75/14C08L2205/03C08L25/06C08L35/02C08K5/098C08K3/22C08K7/14C08K13/04
Inventor 鞠明杰成源邓军发
Owner 南京聚发新材料有限公司
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