Block-copolymerized carbodiimide compound and preparation method thereof

A technology of copolymerizing carbodiimide and carbodiimide, which is applied in the direction of organic chemistry, can solve the problems of low reactivity, yellow color, and difficulty in inhibiting aromatic polymerization carbodiimide, so as to ensure long-term hydrolysis resistance , Reduce viscosity increase, inhibit degradation effect

Inactive Publication Date: 2018-05-29
SHANGHAI LANGYI FUNCTIONAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aromatic polymerized carbodiimide has low reactivity and yellow color, which makes it difficult to inhibit the degradation of polyester materials during processing
The aliphatic or alicyclic polymerized carbodiimide has high reactivity, but when

Method used

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  • Block-copolymerized carbodiimide compound and preparation method thereof
  • Block-copolymerized carbodiimide compound and preparation method thereof
  • Block-copolymerized carbodiimide compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) In a nitrogen atmosphere, add 8.58kg of triisopropylphenyl diisocyanate and 0.0429kg of catalyst MPPO, and carry out polycondensation reaction at about 180°C to obtain polytriisopropylphenylcarbodiimide with a degree of polymerization of about 2 .

[0038] 2) In a nitrogen atmosphere, 10.48kg of 4,4'-dicyclohexylmethane diisocyanate and 0.0524kg of catalyst MMPO were subjected to polycondensation reaction at 160°C to obtain a poly-4,4'-bicyclo with a degree of polymerization of about 3 Hexylmethanecarbodiimide. Cool the reaction down to 120°C, add 0.9kg of chain extender 1-amino-3-propanol at a molar ratio of 1.2:1, react for 1h, complete half-capping to obtain an intermediate product, and add polytriisopropyl Benzene carbodiimide, add 0.008 kg of stannous octoate catalyst, raise the temperature to 140 ° C, and react for 1.5 hours to obtain 15.6 kg of white powder product, which is a block copolymerized carbodiimide compound.

[0039] The carbon spectrum of the pro...

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Abstract

The invention relates to a block-copolymerized carbodiimide compound. The block-copolymerized carbodiimide compound has the structural formula as shown in the description, and is prepared by a condensation polymerization between an aromatic carbonized diamine oligomer and an aliphatic or alicyclic carbodiimide oligomer. The obtained block-copolymerized carbodiimide compound can serve as a hydrolysis-resistant stabilizer, a chain extender and a processing aid to be used for polyester and polyamide compounds, particularly special polyester materials for thin films in the photovoltaic industry, bio-degradable materials for mulching films, automobile polyamide materials and the like, can effectively prevent polyester materials from hydrolysis, and compared with traditional haplotype and aggregate-type carbodiimide, can not only guarantee the material performance under hot and humid conditions but also greatly inhibit plastics from being degraded during processing.

Description

technical field [0001] The invention relates to a carbodiimide compound and a preparation method thereof, in particular to a block copolymerized carbodiimide compound and a preparation method thereof. Background technique [0002] my country is a large agricultural production country. The use of plastic film began in 1979, and the current coverage area has reached 370 million mu. In 2012, the annual output reached 1.31 million tons. It is expected that the coverage area will reach 450 million mu and the output will reach 1.5 million in 2017. Ton. About 25% of the common mulch currently used remains in the soil after being used every year. [0003] Most of these residual mulch films are made of polyethylene raw materials, which do not have any degradation properties, are difficult to recycle, and have low recycling economic value, and will remain in the soil for more than 100 years. As the accumulation of non-degradable mulch film residues is increasing, the damage to soil a...

Claims

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Application Information

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IPC IPC(8): C07C267/00C08K5/29C08L67/04C08L77/00
CPCC07C267/00C08K5/29C08L67/04C08L77/00C08L2201/06C08L2203/16
Inventor 张文彬杨源源丁群朱旭董建廷唐晓峰
Owner SHANGHAI LANGYI FUNCTIONAL MATERIALS
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