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A kind of grafting method of silane-grafted polyolefin elastomer and preparation method of silane-grafted cross-linked polyolefin elastomer

A technology of polyolefin elastomer and cross-linked polyolefin, which is applied in the field of silane grafted polyolefin elastomer, can solve problems such as the inability to maintain the inherent shape of raw materials, and achieve high production efficiency, high selectivity, and simple reaction control methods.

Active Publication Date: 2016-05-18
上海高分子功能材料研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Looking at the existing curing (cross-linking) methods using ultraviolet light, it can be seen that they are all curing (cross-linking) methods after the raw materials are volatilized by solvents or heated to change the shape, and cannot maintain the inherent shape of the raw materials. Once cross-linked, the material ready-made

Method used

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  • A kind of grafting method of silane-grafted polyolefin elastomer and preparation method of silane-grafted cross-linked polyolefin elastomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The grafting method of the grafting material that this example provides, the raw material ratio that it adopts is shown in Table 1, wherein the density of polyolefin elastomer resin is 0.87g / cm 3 , the melt index is 1.2g / 10min, the light transmittance is 30%; the ultraviolet photoinitiator is benzophenone, and the silane crosslinking agent is vinyltriethoxysilane.

[0030] Grafting method specifically comprises the following steps:

[0031] (1) At room temperature, dissolve the UV photoinitiator in the silane crosslinking agent to obtain a silane solution of the UV photoinitiator;

[0032] (2) At room temperature, seal the polyolefin elastomer resin and the silane solution of the UV photoinitiator, mix them well, and place them for a certain period of time until they are fully absorbed (the silane solution of the UV photoinitiator is completely absorbed into the polyolefin elastomer. resin) to obtain the mixture;

[0033] (3) Make the mixture obtained in step (2) unde...

Embodiment 2

[0035] The grafting method of the grafting material that this example provides, the raw material ratio that it adopts is shown in Table 1, wherein the density of polyolefin elastomer resin is 0.902g / cm 3 , the melt index is 3.6g / 10min, the light transmittance is 30%; the ultraviolet photoinitiator is 2-methyl-1-(4-methylthiophenyl)-2-morpholine-1-acetone, silane crosslinking The agent is vinyltrimethoxysilane.

[0036] Grafting method specifically comprises the following steps:

[0037] (1) At room temperature, dissolve the UV photoinitiator in the silane crosslinking agent to obtain a silane solution of the UV photoinitiator;

[0038] (2) At a temperature of about 10°C, seal the polyolefin elastomer resin and the silane solution of the UV photoinitiator, mix them well, and place them for a certain period of time until they are fully absorbed (the silane solution of the UV photoinitiator is completely absorbed into the poly Olefin elastomer resin) to obtain the compound;

...

Embodiment 3

[0041] The grafting method of the grafting material that this example provides, the raw material ratio that it adopts is shown in Table 1, wherein the density of polyolefin elastomer resin is 0.87g / cm 3 , the melt index is 1.2g / 10min, and the light transmittance is 60%; the ultraviolet photoinitiator is benzoin dimethyl ether, and the silane crosslinking agent is methyltriethoxysilane.

[0042] Grafting method specifically comprises the following steps:

[0043] (1) At room temperature, dissolve the UV photoinitiator in the silane crosslinking agent to obtain a silane solution of the UV photoinitiator;

[0044] (2) At a temperature of about 65°C, seal the polyolefin elastomer resin and the silane solution of the UV photoinitiator and mix well to make the two fully absorbed (the silane solution of the UV photoinitiator is completely absorbed into the polyolefin elastomer resin within) to obtain the mixture;

[0045] (3) Make the mixture obtained in step (2) undergo a grafting...

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Abstract

The invention relates to a grafting method for a silane-grafted polyolefin elastomer and a preparation method for the silane-grafted cross-linked polyolefin elastomer. The grafting method comprises the following steps: (1) dissolving an ultraviolet photoinitiator in a silane crosslinker to obtain a silane solution of the ultraviolet photoinitiator; (2) absorbing the obtained silane solution of the ultraviolet photoinitiator in polyolefin elastomer resin to obtain a mixture; (3) enabling the obtained mixture to be subjected to grafting reaction under ultraviolet irradiation to obtain the silane-grafted polyolefin elastomer. The preparation method comprises the following step of enabling the obtained silane-grafted polyolefin elastomer to be subjected to crosslinking reaction. The methods provided by the invention have the advantages that energy conservation, environmental-protection and high efficiency are achieved; silane can be effectively grated to the polyolefin elastomer at a normal temperature, and the natural shape (non-destructive performance) of a polyolefin elastomer raw material can be kept. The production efficiency of the silane-grafted material can be increased, the use field of the silane-grafted material can be broadened, energy is saved, the production cost is lowered, and the expansibility is relatively high.

Description

technical field [0001] The invention relates to a preparation method of a silane grafted polyolefin elastomer and a silane grafted crosslinked polyolefin elastomer. Background technique [0002] The silane grafting technology is to graft vinyltrimethoxysilane or vinyltriethoxysilane onto the main chain of polyolefin, such as polyethylene, and generally complete the melt grafting process in an extruder. This technology belongs to reactive extrusion technology. It has the advantages of reactive extrusion technology, which can design the feeding sequence, controllable reaction heating temperature, short reaction residence time and controllable residence time distribution, strong mixing ability and uniform system mixing. At present, there are many patents on the grafting of silane to polyolefin based on reactive extrusion technology. However, this technology generally uses a peroxide initiator to react at a high temperature (the temperature is between 160 and 230°C). The perf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F255/02C08F230/08C08F2/48C08J3/24C08L51/06
Inventor 穆肖斌李骥安
Owner 上海高分子功能材料研究所