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A kind of copolymer and its preparation method and use

A technology of copolymers and polymers, which is applied in the direction of chemical instruments and methods, dyeing methods, detergent compositions, etc., can solve the problems of weakening dye complexation or adsorption capacity, resistance to dye migration agent, etc., to ensure dispersibility And anti-dye transfer performance, strong complexation and adsorption capacity, good dispersion performance

Active Publication Date: 2022-05-13
重庆市化工研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, since the vinylimidazole-vinylpyrrolidone copolymer will interact with the surfactant, thus weakening its ability to complex or adsorb dyes, especially in the case of anionic surfactants, vinyl Imidazole-vinylpyrrolidone copolymers will interact with surfactants to coagulate, resulting in the problem of hindering the effect of anti-dye transfer agents

Method used

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  • A kind of copolymer and its preparation method and use
  • A kind of copolymer and its preparation method and use
  • A kind of copolymer and its preparation method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Nitrogen was replaced in a four-necked flask equipped with mechanical stirring, constant pressure dropping, and a funnel thermometer, then 200 g of purified water was added, the pH was adjusted to 7-9 with ammonia water, stirring was started, and when the temperature was raised to 45 ° C, vinylpyrrolidone ( NVP) 14.9884g (0.1349mol), vinylimidazole (VI) 45.00g (0.4782mol), vinyl oxazolidinone (NVO) 10.00g (0.0885mol), when the temperature rises to 68°C, add AIBN 0.5g, and carry out Pre-polymerize for about 50 minutes; continue to heat up to 72°C, add 2g of AIBN, and drop the remaining vinylpyrrolidone 30.0116g (0.2694mol) at the same time, dropwise for about 1.5h, then keep warm for 3h, heat up to 75°C, add azo 0.3g of diisobutylamine hydrochloride was carried out three times to eliminate residues, once every 1h, and finally obtained a copolymer with a concentration of about 30wt%, the solution was faintly light yellow, and the content NVP of each residue in the solution ...

Embodiment 2

[0039] Nitrogen was replaced in a four-necked flask equipped with mechanical stirring, constant pressure dropping, and a funnel thermometer, then 200 g of purified water was added, the pH was adjusted to 7-9 with ammonia water, stirring was started, and when the temperature was raised to 45 ° C, vinylpyrrolidone ( NVP) 14.9884g (0.1349mol), vinylimidazole (VI) 45.00g (0.4782mol), vinyl oxazolidinone (NVO) 10.00g (0.0885mol), when the temperature rises to 68°C, add AIBN 0.5g, and carry out Pre-polymerize for about 50 minutes; continue to heat up to 72°C, add AIBN 3g, and drop the remaining vinylpyrrolidone 30.0116g (0.2694mol) at the same time, dropwise for about 1.5h, then keep warm for 3h, heat up to 75°C, add azo Diisobutylamine hydrochloride 0.3g, carried out three times to eliminate residues, once every 1h, and finally obtained a copolymer with a concentration of about 30wt%, the solution was faintly light yellow, and the NVP content of each residue in the solution was 9.46...

Embodiment 3

[0041] Nitrogen was replaced in a four-necked flask equipped with mechanical stirring, constant pressure dropping, and a funnel thermometer, then 200 g of purified water was added, the pH was adjusted to 7-9 with ammonia water, stirring was started, and when the temperature was raised to 45 ° C, vinylpyrrolidone ( NVP) 14.9884g (0.1349mol), vinylimidazole (VI) 45.00g (0.4782mol), vinyl oxazolidinone (NVO) 10.00g (0.0885mol), when the temperature was raised to 68°C, V50 0.5g was added to carry out Pre-polymerize for about 50 minutes; continue to heat up to 72°C, add V50 3g, and drop the remaining vinylpyrrolidone 30.0116g (0.2694mol) at the same time, dropwise for about 1.5h, then keep warm for 3h, heat up to 75°C, add azo Diisobutylamine hydrochloride 0.3g, carried out three times to eliminate residues, once every 1h, and finally obtained a copolymer with a concentration of about 30wt%, the solution was faintly light yellow, and the NVP of each residue in the solution was 8.51 ...

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Abstract

The present invention provides a copolymer obtained by polymerization of monomers vinylpyrrolidone, vinylimidazole, and vinyloxazolidone. This polymer is particularly It can exert excellent anti-dye migration effect in the presence of anionic surfactants, and the addition amount is small. The invention also provides a polymerization method for the above-mentioned copolymer, which has a simple preparation process and mild reaction conditions, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a copolymer and its preparation method and application. Background technique [0002] In laundry detergents, dye transfer inhibitors are often added to prevent mutual staining of clothes when they are washed together. [0003] Currently, dye transfer inhibiting agents commonly added to laundry detergents are generally polymers comprising monomers with nitrogen heterocyclic groups in copolymerized form. Polymers such as polyvinylpyrrolidone or polyvinyllactam, which have various properties due to their cyclic lactam structure, have attracted attention as useful industrial products and are now indispensable substances for dye transfer inhibitors. Vinylimidazole-vinylpyrrolidone copolymer (PVPVI) is very effective in eliminating the transfer of dissolved or suspended dyes while enhancing the performance of detergent compositions formulated therewith. [0004] However, surfactants ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F226/06C08F226/10C08F2/10C08F4/30C08F4/10C11D3/00C11D3/37D06P5/10
CPCC08F226/06C08F2/10C08F4/30C08F4/10C11D3/0021C11D3/3776D06P5/10C08F226/10
Inventor 颜邦民岳中宇向英李金锜黄若峰王剑宇兰剑平王娟张丹
Owner 重庆市化工研究院有限公司
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