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Modified coupling agent and its preparing process and use

A coupling agent and modification technology, which is applied in the field of maleic anhydride grafted polyolefin polymer coupling agent, can solve the problems of severe crosslinking, poor fluidity, and inconspicuous effect, and achieve good compatibility and improve tensile strength. The effect of elongation

Inactive Publication Date: 2005-06-01
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, as described in CN1230554, polypropylene, maleic anhydride, initiator and other additives are homogeneously mixed with the help of a small amount of dispersant, and then the mixture is added to the extruder hopper for melt extrusion, but the obtained products all exist Problems of high residual maleic anhydride, severe cross-linking, inaccurate control of grafting rate, and poor fluidity
Although the method of adding cross-linking inhibitors, antioxidants or mixed initiators plays a certain role, the effect is not obvious
[0004] In the project of filling polypropylene and polyethylene with high calcium carbonate, the filling amount of calcium carbonate is required to be 50%, and various coupling agents such as titanate are selected, and the filling amount of calcium carbonate can only reach 30%, and the performance index is also very low. Cannot meet the requirements, so far has not been resolved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1000 grams of terminal olefin content is 70% high activity polyisobutene (molecular weight 2300) to add in the reactor with stirring, after nitrogen replacement, add 0.8 gram maleic anhydride in the ratio of 1:5 of the molar ratio of maleic anhydride and polyisobutene Acid anhydride, toluene 300ml, stir and mix evenly, and react for 200 minutes under the condition that the rotation speed is set at 600rpm and the reaction temperature is 180°C. Finally, stripping with nitrogen gas at 190° C. for 50 minutes to remove unreacted maleic anhydride, recover the solvent xylene, and obtain a maleic anhydride-grafted polyisobutylene polymer coupling agent.

[0022] Place the prepared reactants in a vacuum drying oven and dry at 110°C for 24 hours to remove maleic anhydride monomers that do not participate in the grafting reaction and ensure that the partially hydrolyzed acid anhydride groups in the grafts are reduced to cyclic anhydrides base form. Take out 1~2g sample from the r...

Embodiment 2

[0024] 1000 grams of terminal olefin content is 71% high activity polyisobutene (molecular weight 1300) to add in the reactor with stirring, after nitrogen replacement, add 1.5 grams of maleic anhydride in the ratio of 1:5 of the molar ratio of maleic anhydride and polyisobutene Acid anhydride and 300ml of xylene were stirred evenly and mixed, and the reaction was carried out for 200 minutes under the condition that the rotation speed was set at 600rpm and the reaction temperature was 180°C. Remove unreacted maleic anhydride with nitrogen stripping, reclaim solvent, obtain maleic anhydride grafted polyisobutylene polymer coupling agent, adopt the titration method identical with example 1 to measure its grafting rate. The results are shown in Table 1.

Embodiment 3

[0026] 1000 grams of terminal olefin content is 69% high activity polyisobutene (molecular weight 900) to add in the reactor with stirring, after nitrogen replacement, add 2.2 grams of maleic anhydride in the ratio of 1:5 of the molar ratio of maleic anhydride and polyisobutene Acid anhydride and 300ml of benzene were mixed evenly by stirring, and the reaction was carried out for 200 minutes under the condition that the rotation speed was set at 600rpm and the reaction temperature was 180°C. Remove unreacted maleic anhydride with nitrogen stripping, reclaim solvent, obtain maleic anhydride grafted polyisobutylene polymer coupling agent, adopt the titration method identical with example 1 to measure its grafting rate. The results are shown in Table 1.

[0027] As can be seen from Table 1, no initiator is needed for highly active polyisobutylene, and maleic anhydride with no pollution (very low residual amount of maleic anhydride), low degree of crosslinking, good fluidity, and ...

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Abstract

The present invention provides one kind of coupler for stuffing modification of organic polymer and its preparation process. The coupler maleic anhydride grafted polyisobutylene polymer with grafting rate controlled in 1-80 % and prepared the grafting reaction with maleic anhydride and polyisobutylene with or without initiator. The polyisobutylene is common polyisobutylene or high activity polyisobutylene of molecular weight 800-10000, and the grafting reaction has reaction temperature 120-250 deg.c and reaction time of 30-240 min. The coupler can improve the compatibility and adherence between the polymer and the inorganic stuffing, and has the features of no pollution, precisely controlled grafting rate, wide application range, etc.

Description

technical field [0001] The invention relates to a method of grafting polymerization reaction of maleic anhydride and polyisobutylene under the action of an initiator or without an initiator to prepare a maleic anhydride grafted polyolefin polymer coupling that can be used for filling and modifying organic polymers. agent. Background technique [0002] Non-polar and crystalline organic polymers have poor compatibility with other materials, such as polar polymers and inorganic fillers, and cannot prepare useful blended materials. In order to achieve the expected performance of the composite material, it is necessary to use a coupling agent to modify the surface of the filler to enhance its compatibility and bonding with the base resin. The effect of the coupling agent on the filler interface modification is to improve the quality grade of plastic products, increase the added value of plastic products, and promote the development of new plastic products and the application of ...

Claims

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Application Information

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IPC IPC(8): C08F4/32C08F279/02C08L23/00C08L27/06C08L67/00
Inventor 齐泮仑邹恩广宋磊王熺柏晓红西晓丽李建忠王刚崔锡红秦丽华马建英郝振军王路海佟华芳赵光辉
Owner PETROCHINA CO LTD
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