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Low-molecular-weight polybutadiene emulsion and release agent

A technology of polybutadiene and low molecular weight, which is applied in the direction of conjugated diene coating, casting mold composition, coating, etc., and can solve the problems of low toughness and impact resistance, low surface energy, and insufficient density of film formation. Achieve strong impact resistance, improved strength and toughness, and good temperature resistance

Pending Publication Date: 2021-10-29
龙口市易久环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Commonly used materials for release agents include grease, wax, organic silicon, organic fluorine and other materials, among which grease and silicone oil have poor toughness and impact resistance due to their low molecular weight (Mn is generally lower than 1000); , the film formation is not dense enough; both organic silicon and organic fluorine have extremely low surface energy, and a small amount of residue will cause the surface energy of the product to be too low, which cannot be used for post-coating and bonding treatment

Method used

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  • Low-molecular-weight polybutadiene emulsion and release agent
  • Low-molecular-weight polybutadiene emulsion and release agent
  • Low-molecular-weight polybutadiene emulsion and release agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Preparation of low molecular weight polybutadiene emulsion

[0033] 1) Raw materials:

[0034] (1) Low molecular weight polyteadiene, commercially available.

[0035] The low molecular weight polybutadiene comprises: 1, 2 vinyl double bond (1%); 1, 4 cis double bond (82%); 1, 4 trans 2 bond (17%); Mn = 2900 .

[0036] (2) Carbon (10) isomeric alcohol polyoxyethylene ether (EO = 10), commercially available.

[0037] (3) Polymer emulsified dispersant, EO / PO block copolymer, commercially available.

[0038] 2) The ratio of the above raw materials is (calculated by weight fraction):

[0039]

[0040] 3) Polymerization process

[0041] The raw material was mixed, warmed to 90 ° C, add 1 / 3 (90 ° C) hot water, stirred at a high speed mixer for 30 min, increase the rotational speed to 12000 rpm, and slowly add 2 / 3 normal temperature water. Hold 40 ° C for 30 min, filtered, and the light white emulsion of 0.2 μm particle size was obtained.

Embodiment 2

[0042] Example 2. Preparation of low molecular weight polybutadiene emulsion

[0043] 1) Raw materials:

[0044] (1) Low molecular weight polyteadiene, commercially available.

[0045] The low molecular weight polybutadiene properties include a 1,2 vinyl double bond (61%); 1, 4 cis double bond (39%); Mn = 2200.

[0046] (2) Carbon (13) isomeric alcohol polyoxyethylene ether (EO = 7), commercially available.

[0047] (3) Polymer emulsified dispersant, EO / PO block copolymer, commercially available.

[0048] 2) The ratio of the above raw materials is (calculated by weight fraction):

[0049]

[0050] 3) Polymerization process

[0051] The raw material was mixed, warmed to 80 ° C, add 80 parts (80 ° C) hot water, stirred at a high speed mixer 6000 rpm for 30 min, increase the speed to 15000 rpm, and gradually add 200 normal warm water. The mixture was stirred at 40 ° C for 30 min, and the discharge was filtered to give a light white emulsion having a particle size of 0.2 μm.

[00...

Embodiment 3

[0053] Example 3: Molecularly polybutadiene emulsion produced using Example 1 Making PU Solentian

[0054] 1) Formulation (by weight of the weight):

[0055]

[0056]

[0057] 2) Application method

[0058] Before using the water, it is doubled, and it is equipped with a working fluid, spray it 4 times. Sole products are not needled to be painted and bonded.

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Abstract

The invention discloses a low-molecular-weight polybutadiene emulsion and a release agent, and belongs to the field of release agents. The low-molecular-weight polybutadiene emulsion comprises the following raw materials in parts by weight: 90-120 parts of low-molecular-weight polybutadiene; 12-18 parts of isomeric alcohol polyoxyethylene ether; 3-8 parts of a polymer emulsifier (EO / PO block); and 50-310 parts of H2O; The low-molecular-weight polybutadiene comprises a 1, 2 addition structure and a 1, 4 addition structure, and the number-average molecular weight of the low-molecular-weight polybutadiene is 2000-10000. The low-molecular-weight polybutadiene emulsion can form a thin and compact self-crosslinking coating, can resist high-pressure and high-temperature liquid impact, and does not affect later coating and bonding of a product.

Description

Technical field [0001] The present invention relates to the field of release agents, in particular a low molecular weight polybutadiene emulsion and a release agent. Background technique [0002] The mold forming of metal, rubber, plastic, concrete, etc., is widely used in the mold, and the release agent is generally applied to the surface of the mold in the form of spraying, wiping, and the like to form a coating. The coating isolation article is adsorbed, adsorbed, enabling the product to prevent the product or mold in the demolding process, and improve the productivity. Due to the laws and regulations of safe production and environmental protection, emulsion-type release agents that do not contain volatile organics become the main development direction of the industry. [0003] Release agent common materials include grease, wax, silicone, organic fluorine, etc., wherein the fatty resistance and impact resistance of the grease and silicone oil (Mn generally less than 1000) is p...

Claims

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Application Information

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IPC IPC(8): C09D109/00C09D7/65B22C3/00B29C33/62
CPCC09D109/00C09D7/65B22C3/00B29C33/62C08L71/02
Inventor 杨卫宁麻常青
Owner 龙口市易久环保科技有限公司
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