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Method for preparing rosin modified organic silicon resin

A technology of rosin modification and organosilicon, which is applied in the field of preparation of rosin-modified silicone resin, can solve problems such as no public reports on the preparation method of rosin-modified silicone resin, and achieves the promotion of industrial development and the improvement of adhesion. , the effect of improving heat resistance and electrical insulation properties

Active Publication Date: 2012-08-01
JIANGXI PROVINCE HANGYU NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Publication No. CN101121788 discloses "A Method for Preparation of Silicone Resin", but there is no public report on the preparation method of rosin-modified silicone resin

Method used

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  • Method for preparing rosin modified organic silicon resin
  • Method for preparing rosin modified organic silicon resin
  • Method for preparing rosin modified organic silicon resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Take 10.0g of tetramethyldivinyldisiloxane and 50g of octamethylcyclotetrasiloxane (D4) and place it in a 500ml three-necked flask, start the stirrer, add 3.0g of concentrated sulfuric acid as a catalyst, heat The temperature is raised to 60°C, the reaction is kept under normal pressure and stirred for 6 hours, then lowered to below 50°C to remove the filter agent, and the low molecular weight is removed at 120-160°C for 5-8 hours at a pressure below 133Kpa to obtain an intermediate vinyl-terminated polymer. Siloxane, low molecular weight can be reused.

[0037] (2) after the above-mentioned (1) reaction is finished, add 40g rosin and 0.08g hydroquinone catalyst, be warming up to 200 DEG C and carry out Diels-Alder addition reaction, after 6 hours of reaction, vacuumize to 3mmHg, remove low boiling point Impurities, the product was cooled to room temperature to obtain an adduct of vinyl terminated polysiloxane and rosin.

[0038] (3) then add pentaerythritol 6.4g, ...

Embodiment 2

[0040] (1) Take 10.0g of tetramethyldivinyldisiloxane and 50g of octamethylcyclotetrasiloxane (D4) and place it in a 500ml three-necked flask, start the stirrer, and add 4.0g of strongly acidic styrene resin as a The catalyst is heated to 60°C, reacted under normal pressure and kept stirring for 6 hours, then lowered to below 50°C to remove the filter agent, and the low molecular weight is removed at 120-160°C for 5-8 hours at a pressure below 133Kpa to obtain the intermediate vinyl End-capped polysiloxane, low molecular weight can be reused.

[0041] (2) after the above-mentioned (1) reaction is finished, add 60g rosin and 0.10g p-toluenesulfonic acid catalyst, be warming up to 200 DEG C and carry out Diels-Alder addition reaction, after 6 hours of reaction, vacuumize to 3mmHg, remove Low boiling point impurities, the product was cooled to room temperature to obtain the adduct of vinyl terminated polysiloxane and rosin.

[0042] (3) then add pentaerythritol 15.6g, glycerol 1...

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Abstract

The invention discloses rosin modified organic silicon resin and a preparation method thereof. The method comprises the three-step reaction of: (1) performing polymerization reaction of divinyltetramethyldisiloxane and octamethylcyclotetrasiloxane in the presence of a catalyst, namely strongly acidic styrene resin to obtain a polymer of vinyl group-terminated polysiloxane; (2) performing Diels-Alder addition reaction of the polymer and rosin to obtain an additive product; and (3) performing esterification reaction of the additive product, pentaerythritol and glycerol under the action of a catalyst, namely zinc chloride to obtain the rosin modified organic silicon resin. According to the method, an organic silicon resin is modified by using the rosin; the prepared resin has the characteristics of high water resistance, high and low temperature resistance, weather resistance, after-tack resistance and adhesion; and the resin can be widely applied to the field of electronic packaging and the like.

Description

technical field [0001] The invention relates to a preparation method of a rosin-modified organosilicon resin, and belongs to the technical field of organosilicon resin preparation. Background technique [0002] Rosin is mainly extracted from the secretions of pine trees. It is a kind of natural resin that is extremely abundant in nature. It is a renewable resource. Rosin is widely used because of its excellent properties such as anti-corrosion, moisture-proof, insulation, adhesion and emulsification. , but there are characteristics such as poor cohesion and brittleness. Using the functional groups of rosin including one carboxylic acid and two double bonds, other materials are modified to introduce the advantages of rosin structure and performance. [0003] At present, silicone resin has been widely used in the field of daily necessities due to its good performance, but its drying performance at room temperature, solvent resistance, and adhesion are not ideal, which affects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C08G77/06
Inventor 游胜勇陈衍华谌开红
Owner JIANGXI PROVINCE HANGYU NEW MATERIAL CO LTD
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