A kind of saturated polar polymer and preparation method thereof

A technology of polar polymers and polymers, applied in the field of saturated polar polymers and their preparation, can solve problems such as poor saturation of polymers, achieve continuous adjustment of content and saturation, simple reaction operation, and high polymerization rate high effect

Active Publication Date: 2022-06-17
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology

[0003] Chinese patent CN110527004A discloses grafting and modifying natural rubber latex by mercapto-ene click chemistry, introducing polar groups into its main chain to improve the oil resistance of natural rubber; at the same time, through solution hydrogenation of functionalized natural rubber , eliminate the remaining unsaturated double bonds in the main chain, further increase its saturation, and prepare functionalized natural rubber with good oil resistance and excellent mechanical properties, which expands the application field and use range of natural rubber, but there is still polymer saturation poor degree of problem

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  • A kind of saturated polar polymer and preparation method thereof

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[0024] The invention provides a kind of preparation method of saturated polar polymer, it is characterized in that, comprises the following steps:

[0025] Mixing anionic surfactant, metal ion salt and water to obtain metal ion mixed solution;

[0026] Mixing the metal ion mixed solution, non-polar unsaturated polymer emulsion, hydrazine hydrate and hydrogen peroxide, and performing hydrogenation reduction modification to obtain a hydrogenation reduction modification product;

[0027] The hydrogenation reduction modified product is directly mixed with acrylonitrile monomer and a redox initiation system to carry out a graft polymerization reaction to obtain the saturated polar polymer.

[0028] In the present invention, unless otherwise specified, the raw materials used are all commercially available products in the field.

[0029] In the present invention, an anionic surfactant, a metal ion salt and water are mixed to obtain a metal ion mixed solution.

[0030] In the presen...

Embodiment 1

[0074] Place 30g of natural latex in a 500mL four-necked flask equipped with a stirring paddle, a separatory funnel and a reflux condenser, add deionized water to dilute to a latex solid content of 15%, and add 0.23g of sodium lauryl sulfate, After stirring for 15min, 0.008g of copper sulfate pentahydrate and 66.18g of hydrazine hydrate solution with a mass fraction of 80% were added in sequence; heated in an oil bath, keeping the reaction temperature at 50°C, 180g of hydrogen peroxide with a mass fraction of 30% was added dropwise through a separatory funnel to control The rate of addition was completed within 6 hours. After the addition was completed, the reaction was continued for 1 hour. The temperature was lowered to room temperature. Nitrogen was introduced into the system to remove oxygen. 24h, then add 0.068g tetraethylenepentamine, react at 25°C for 40h under nitrogen protection, then remove unreacted acrylonitrile by vacuum distillation, the latex adopts calcium chlor...

Embodiment 2

[0078] In this example, 30g of natural latex was placed in a 500mL four-necked flask equipped with a stirring paddle, a separatory funnel and a reflux condenser, deionized water was added to dilute until the latex solid content was 15%, and 0.23g of dodecyl was added. Sodium sulfate, after stirring for 15min, add 0.008g copper sulfate pentahydrate and 66.18g 80% hydrazine hydrate solution in turn; heat in oil bath, keep the reaction temperature at 50 ℃, add 180g 30% hydrazine hydrate dropwise through a separatory funnel Hydrogen peroxide, controlled the rate of addition, added within 6 h, after the addition was completed, continued the reaction for 1 h, cooled to room temperature, passed nitrogen into the system to remove oxygen, and added 12.6 g of acrylonitrile and 0.16 g of tert-butyl peroxide in sequence after 30 min Hydrogen, stirred for 24h, then added 0.34g of tetraethylenepentamine, reacted at 25°C for 40h under nitrogen protection, then removed unreacted acrylonitrile ...

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Abstract

The invention provides a saturated polar polymer and a preparation method thereof, belonging to the technical field of modification. The present invention mixes anionic surfactant, metal ion salt and water to obtain metal ion mixed solution; mixes said metal ion mixed solution, non-polar unsaturated polymer emulsion, hydrazine hydrate and hydrogen peroxide, and performs hydrogenation reduction modification, Obtaining a hydrogenation-reduction modified product; directly mixing the hydrogenation-reduction modified product, acrylonitrile monomer and redox initiation system, and performing graft polymerization to obtain the saturated polar polymer. The present invention uses hydrazine hydrate / hydrogen peroxide / metal ion salt as a catalytic system to carry out hydrogenation reduction modification on non-polar unsaturated polymers; The viscosity of the polymerization is low, the heat transfer is fast and the polymerization rate is high, which can effectively improve the grafting efficiency and realize the continuous adjustment of the polar group content and saturation.

Description

technical field [0001] The invention relates to the technical field of modification, in particular to a saturated polar polymer and a preparation method thereof. Background technique [0002] At present, the commonly used highly saturated polar polymer material is hydrogenated nitrile butadiene rubber (HNBR). HNBR has both aging resistance and oil resistance, but its high price greatly limits its wide application in rubber products. Conjugated diene polymer materials, as one of the main raw materials in the rubber industry, have excellent comprehensive properties and are widely used. The attack of , oxygen, ozone, etc., causes the polymer molecular chain to age and degrade or cross-link, and the aging resistance is poor; and the non-polar characteristics of the conjugated diene polymer material make its oil resistance inherent defect. The chemically active unsaturated carbon-carbon double bonds (C=C ) into a saturated structure with polar groups, which can further improve ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F253/00C08F220/44C08C19/02C08F279/02C08F287/00C08F8/04C08F212/08C08F236/10
CPCC08F253/00C08C19/02C08F279/02C08F287/00C08F8/04C08F212/08C08F236/10C08F220/44
Inventor 宗迎夏郎秀瑞韩立静王小蕾王春芙宗成中
Owner QINGDAO UNIV OF SCI & TECH
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