Degradable unsaturated carbamide resin of polyester amide, and synthetic method

A technology of polyester amide urea and synthesis method, applied in the field of degradable unsaturated polyester amide urea resin and its synthesis, can solve the problems of high price of slow-release fertilizer, shortage of slow-release fertilizer and the like

Inactive Publication Date: 2006-04-19
郭文迅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because it is waste utilization, it can at least partially solve the problems of the expensive price of existing slow-release fertilizers and the lack of slow-release fertilizers suitable for southern paddy fields.

Method used

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  • Degradable unsaturated carbamide resin of polyester amide, and synthetic method
  • Degradable unsaturated carbamide resin of polyester amide, and synthetic method
  • Degradable unsaturated carbamide resin of polyester amide, and synthetic method

Examples

Experimental program
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Embodiment 1

[0030] Embodiment 1: the synthesis of unsaturated polyester amide urea resin:

[0031] 19.60g maleic anhydride (0.20 mole), 3.00g urea (0.05 mole) and 9.92g ethylene glycol (0.16 mole) are mixed, put into a 250ml three-necked flask with water separator, place in a silicone oil bath, With electric stirring, react at 100°C for 20 minutes. The temperature was raised to 150°C for 40 minutes for melt polymerization in a nitrogen atmosphere, then the temperature was raised to 180°C for 120 minutes for melt polymerization in a nitrogen atmosphere, and then the temperature was raised to 200°C for melt polymerization in a nitrogen atmosphere. When the distilled reaction water reaches 80% of the theoretical amount, the polymerization is stopped, the temperature is lowered to 150° C. and poured out. After cooling, a dark brown transparent solid unsaturated polyester amide urea resin is obtained.

Embodiment 2

[0032] Embodiment 2: the synthesis of starch-filled unsaturated polyester amide urea resin:

[0033] Mix 23.20g of fumaric acid (0.20 mole), 3.00g of urea (0.05 mole) and 16.96g of ethylene glycol (0.16 mole), put it into a 250ml three-necked flask with a water separator, and place it in a silicone oil bath Medium, with electric stirring, reacted at 100°C for 20 minutes. The temperature was raised to 150°C, and melted and polymerized in a nitrogen atmosphere for 40 minutes, then raised to 180°C, melted and polymerized in a nitrogen atmosphere for 120 minutes, and then heated to 200°C, melted and polymerized in a nitrogen atmosphere for 15 minutes. When the distilled reaction water reaches 80% of the theoretical amount, add starch accounting for 50% of the total mass of the reaction system, stir well, cool down to 150°C and pour it out. After cooling, an opaque light yellow solid starch-filled unsaturated polyester is obtained. Amide urea resins.

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Abstract

A degradable unsaturated polyester-amidourea resin used for disposable food container, packing material, plastic bag, medicinal coating, capsule and slow-releasing material, etc is prepared from C2-C4 binary alcohol, anti-butenedioic acid or maleic anhydride, and urea through fusing and polycondensating. It can be modified by starch or calcium carbonate powder.

Description

technical field [0001] The invention relates to chemically synthesized environmentally degradable polymer materials and methods. Environmentally degradable unsaturated polyester amide urea base resin is prepared by copolymerizing unsaturated diacid (anhydride) (maleic anhydride or fumaric acid) with glycol and urea. Among them, the unsaturated diacid (anhydride) (maleic anhydride or fumaric acid) can be partially replaced by one of adipic acid, phthalic anhydride, and isophthalic acid. Starch and calcium carbonate powder can be used as fillers for this type of resin to prepare unsaturated polyester amide urea resin filled with starch and calcium carbonate powder. This type of resin and its filled modified resin can be used as materials for preparing disposable tableware, packaging materials, shopping bags, flowerpots, medical supplies, drug coating or capsules, drug slow (controlled) release materials, agricultural mulching films, etc. This kind of resin can be used as a slo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/44C08L77/12C08K3/26C08J5/24
Inventor 郭文迅林日先
Owner 郭文迅
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