Preparation of light colore high softening point maleated rosin pentaerythritol
A technology of rosin pentaerythritol ester and high softening point, which is applied in the chemical modification of natural resins, etc., can solve problems such as difficult color reduction, and achieve the effect of improving hardness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Example Embodiment
[0019] Example 1
[0020] A preparation method of light-colored high-softening point maleic rosin pentaerythritol ester, comprising the following steps:
[0021] In the first step, the rosin is refined under the conditions of a vacuum degree of 0-1kPa and a temperature of 200-270℃ to obtain a refined rosin with a softening point of 80-86℃;
[0022] In the second step, under the protection of inert gas, add maleic anhydride with 5-14% of the refined rosin mass and a reducing agent with 0.03-1.0% of the refined rosin mass to the molten refined rosin, and put it at a temperature of 150-230℃ The lower reaction is 0.5-2h; among them, the reducing agent is phosphite or phosphite ester: such as sodium phosphite, triphenyl phosphite, monophenyl diisooctyl phosphite, 3,5-di-tertiary group -4-Hydroxybenzyl diethyl phosphonate one or a mixture of several in any proportion; the proportion of maleic rosin in the quality of refined rosin can be 5%, 8%, 9%, 10%, 11% , 12%, the proportion of redu...
Example Embodiment
[0027] Example 2
[0028] Refining 98g rosin to make 87g refined rosin, pass N 2, Heat to melt, add 0.183g of triphenyl phosphite, 4.4g of maleic anhydride, increase the temperature to 180℃, keep it for 1h, continue to increase the temperature, add bis(3,5-di-tert-butyl-4-hydroxybenzyl) Monoethyl phosphonate) calcium 0.17g, 2,2'-thiobis(4-methyl-6-tert-butylphenol) 0.17g, pentaerythritol 11.4g, pentaerythritol is uniformly added to the reaction system within 0.5 hours . The temperature was raised to 270°C, and after 1 h, tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester 0.15 and alkylphenol disulfide oligomer 0.15g were added. Timed sampling. When the acid value drops to 20mg / g, vacuumize under reduced pressure.
[0029] After 2.5 hours of esterification in this example, the acid value of the product dropped to 16 mg / g, the color was Ghana color No. 2, and the softening point was 124°C.
Example Embodiment
[0030] Example 3
[0031] Refining 114g of rosin to obtain 102g of refined rosin, pass N 2 , Heat to melt, add 0.05g of triphenyl phosphite, 7.2g of maleic anhydride, increase the temperature to 180℃, keep it for 1h, continue to increase the temperature, add tetra[β-(3,5-di-tert-butyl-4) -Hydroxyphenyl) propionic acid] pentaerythritol ester 0.11g, 4,4'-thiobis(6-tert-butyl-3-methylphenol) 0.15g, pentaerythritol 14.1g, pentaerythritol is uniformly added to the reaction within 0.5 hours System. Raise the temperature to 270℃, add 0.13g of bis(3,5-di-tert-butyl-4-hydroxybenzylphosphonate monoethyl) calcium, 2,2'-thiobis(4-methyl-6- Tert-butylphenol) 0.11g. Timed sampling. When the acid value drops to 20mg / g, vacuumize under reduced pressure.
[0032] After 2.5 hours of esterification in this example, the acid value of the product dropped to 15.6 mg / g, the color was Garner No. 2+, and the softening point was 135°C.
PUM
Property | Measurement | Unit |
---|---|---|
Acid value | aaaaa | aaaaa |
Softening point | aaaaa | aaaaa |
Acid value | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap