Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for producing long-acting drip agent for agricultural polyethylene film

A polyethylene film and production method technology, applied in the field of dripping agents, can solve the problems of seed and vegetable fruit mildew damage, short duration, rotten cabbage core and root, etc., and achieve appropriate migration rate, high transparency, long lasting effect

Active Publication Date: 2012-01-11
HANGZHOU BEISHENG POLYMERMATERIAL
View PDF4 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The surface of agricultural polyethylene film is easy to adhere or condense water mist and water droplets, which reduces the transparency, reduces the sunlight flux, affects the photosynthesis effect, is not conducive to the growth of greenhouse crops, and the formation and dripping of water droplets will also cause vegetables in greenhouses. If it is used to preserve seeds and fruits and vegetables to keep them fresh, water droplets will cause mildew and damage to seeds and vegetables and fruits. Therefore, it is of great practical significance to produce an anti-fog droplet agricultural polyethylene film.
The dripping agent is added to the polyethylene film by the internal addition method. Due to the poor compatibility between the two, the dripping agent quickly migrates to the surface of the film and is lost. The effective period is short, generally about three months.
CN1152603 discloses " anti-fogging and waterproof dripping agent and its production method " is to use the product of reaction of alkylamine compound and ethylene oxide as main agent, with the product of polyhydric alcohol, fatty acid and catalyst reaction as auxiliary agent, and then The above-mentioned main agent and auxiliary agent are compounded into anti-fog and waterproof dripping agent. The raw materials of this product are relatively simple, the cost is low, and the early effect is acceptable. Because the synergistic matching of long-chain molecular and short-chain molecular raw materials is not paid much attention to in the ingredients, short duration

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for producing long-acting drip agent for agricultural polyethylene film
  • Method for producing long-acting drip agent for agricultural polyethylene film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1 (see Table 1 corresponding to the raw materials of Embodiment 1 and the proportioning value thereof by weight): 380 parts of polyethylene glycol, 270 parts of stearic acid, and 3 parts of p-toluenesulfonic acid are added to the reactor, all valves are closed, Raise the temperature, stir after the mixture is completely melted, evacuate to negative 0.1Mpa, heat up to 150°C, stir for 4 hours, measure the acid value to 2-4, terminate the reaction, cool and discharge the material to prepare the catalyst; first, 140 parts of paste Add the hydrogenated tallow primary amine to the reaction kettle after heating and melting, then heat up to 120°C, vacuumize (-0.1Mpa) and fill with nitrogen, raise the temperature to 145°C in a nitrogen atmosphere, and then start adding slowly in 20-30min 40 parts of ethylene oxide, fully stirred, the reaction is carried out at 168-175°C and 2.5kg pressure, after all the ethylene oxide is added, the heat preservation is delayed for 10 m...

Embodiment 11

[0018] Example 11 (refer to Table 2 for the corresponding examples of raw materials and their weight ratios): Add 420 parts of main agent, 1300 parts of synergist and 120 parts of catalyst into the reactor, heat up to 105°C while stirring, stir for 1 hour and pump Vacuum-dry until it is suitable for slicing or granulating, cool down and discharge, after slicing or slicing, inspect and pack.

[0019] For the rest of Examples 12-19, refer to Table 2 for the corresponding examples of raw materials and their proportions by weight, and use the same method as Example 11 to prepare the long-acting dripping agent, and Examples 11-13 are preferred.

[0020] In order to reduce the cost, the method adopts industrial-grade chemical raw materials for the raw materials that do not affect the transparency of the film, and uses analytically pure raw materials for the raw materials that affect the transparency. While using lipophilic long carbon chain N,N-bis(2-hydroxyethyl)alkylamine as the m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Saponification valueaaaaaaaaaa
Hydroxyl valueaaaaaaaaaa
Melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for producing a long-acting drip agent for an agricultural polyethylene film. The method comprises the following five steps: preparing materials, wherein the first group of materials comprise polyethylene glycols, stearic acid and a p-toluenesulfonic acid for preparing a catalyst, the second group of materials comprise hydrogenated tallow alkyls and ethylene oxides for preparing a main agent, and the third group of materials comprise sorbitan tristearate and glyceryl monostearate for preparing a synergic agent; after the catalyst, the main agent and the synergic agent are respectively prepared by using the raw materials, adding 420-480 parts by weight of main agent, 1300-1400 parts by weight of synergic agent and 120-160 parts by weight of catalyst into a reaction kettle; carrying out stirring and synthetic reaction for 1 hour at the temperature of 105 DEG C; and carrying out vacuum drying, emptying, and slicing or granulating so as to obtain the long-acting drip agent. The drip agent is used as an addition agent for producing the agricultural polyethylene film, and has the advantages of small hydrophilic-lipophilic balance (HLB) value, appropriatedrip agent migration rate and better primary effectiveness and durability; the effectiveness-persisting period of the drip agent can reach 5-6 months; and through adjusting the proportions of partialraw materials, the long-acting drip agent can be respectively used for producing agricultural polyethylene films suitable for the southern or northern climate.

Description

technical field [0001] The invention relates to a production method for producing a dripping agent for agricultural polyethylene film as an auxiliary agent. Background technique [0002] The surface of agricultural polyethylene film is easy to adhere or condense water mist and water droplets, which reduces the transparency, reduces the sunlight flux, affects the photosynthesis effect, is not conducive to the growth of greenhouse crops, and the formation and dripping of water droplets will also cause vegetables in greenhouses. If the core and vegetable root are rotten, if it is used to preserve seeds and fruits and vegetables, water droplets will cause mildew and damage to seeds and vegetables and fruits. Therefore, it is of great practical significance to produce an anti-fog droplet agricultural polyethylene film. The dripping agent is added to the polyethylene film by the internal addition method. Due to the poor compatibility between the two, the dripping agent will migrat...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L23/06C08K5/00C08K5/17C08K5/1535C08K5/103
Inventor 章德永
Owner HANGZHOU BEISHENG POLYMERMATERIAL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com