A kind of polymerized rosin mixed ester and its preparation method and application
A technology for polymerizing rosin and mixed esters, which is applied in the field of rosin esters, which can solve the problems of not being able to effectively increase the glass transition temperature of polymers, affecting the bonding performance, and not being able to effectively disperse, so as to overcome high steric hindrance effects and increase compatibility Sex, the effect of reducing the activation energy of the reaction
Active Publication Date: 2022-02-15
广东科茂林产化工股份有限公司 +1
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Problems solved by technology
[0007] Due to its high molecular weight, high softening point and strong rigidity, polymerized rosin esters are less compatible with matrix polymers such as adhesives at low temperatures, and cannot effectively increase the glass transition temperature of polymers as tackifying resins. , reduce the movement of molecular chains in the high-frequency region and increase the molecular movement in the low-frequency region, and cannot be effectively dispersed into materials such as adhesives, thereby affecting its bonding performance
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preparation example Construction
[0047] A kind of preparation method of polymerization rosin mixed ester, comprises the following steps:
[0048] (1) In a 1000mL dry four-neck flask equipped with a stirring rod, a water separator, a temperature sensor and a constant pressure dropping funnel, add broken polymerized rosin with a quality of A, feed inert gas protection, and heat up to a temperature of T 1 , stirred until melted;
[0049] (2) Add a mass of B to the polymerized rosin after melting 1 Composite catalyst, add the mixed alcohol whose mass is C at a constant speed, and the dropping time is t 1 , after the dropwise addition is completed, heat preservation is carried out, and the heat preservation time is t 2 , and then increase the temperature at a constant rate to T 2 , heating time t 3 , add the remaining mass as B 2 Composite catalyst, after the reaction is complete, unreacted raw materials and low molecular weight substances are removed by distillation under reduced pressure, and an antioxidant...
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Abstract
The invention discloses a polymerized rosin mixed ester, a preparation method and application thereof, and belongs to the field of rosin esters. The polymerized rosin mixed ester has a structural formula as shown in formula (I). It is obtained by esterification reaction of polymerized rosin and mixed alcohol. The raw material polymerized rosin is a polymerized product of rosin, belongs to natural renewable resources, has abundant sources, is environmentally friendly and clean, and is simple to prepare. This application reduces the softening point and rigidity of the resin by adding long-chain monohydric or dihydric alcohols during the reaction process between polymerized rosin and trihydric alcohols or tetrahydric alcohols, thereby increasing the compatibility of the resin with the matrix polymer under low temperature conditions. It overcomes the limitation of the use temperature of the polymerized rosin ester, so that it can maintain good bonding performance under different temperature conditions.
Description
technical field [0001] The invention belongs to the field of rosin esters, and in particular relates to a polymerized rosin mixed ester and a preparation method and application thereof. Background technique [0002] Polymerized rosin ester is a product obtained by the esterification reaction of polymerized rosin and alcohol. The raw material of polymerized rosin is a derivative of rosin, which is generally prepared in a solvent by catalytic polymerization. The main component of polymerized rosin is the dimer of rosin acid, which contains two carboxyl groups in the molecular structure, which has high softening point, light color, no crystallization, excellent oxidation resistance, good thermal stability, and higher resistance in organic solvents. Low viscosity and low acid value, as an important chemical raw material, it can be used directly or processed into esters or salts. [0003] Compared with polymerized rosin ester, polymerized rosin ester has better oxidation resista...
Claims
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IPC IPC(8): C09F1/04C09J11/08C09D11/03C09D7/65
CPCC09F1/04C09J11/08C09D11/03C09D7/65
Inventor 翁亮徐社阳曾昭君
Owner 广东科茂林产化工股份有限公司