Low-medium density thread protector polyvinyl chloride resin production method
A polyvinyl chloride resin and thread protector technology, applied in the field of polyvinyl chloride, can solve the problems of thread damage at the pipe end, large impact force at the pipe end, loss of protection, etc., and achieve the effect of simple production process and low density
Inactive Publication Date: 2017-04-26
天津市津英达塑料制品有限责任公司
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- Abstract
- Description
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- Application Information
AI Technical Summary
Problems solved by technology
The connection between the protector and the pipe end generally adopts threaded connection, but when the steel pipe is hoisted and transported, it is easy to make the pipe end bear excessive impact force, which will cause great damage to the thread of the pipe end
The existing protector is made of ordinary pvc resin, and the protective cap made of it is prone to rapid aging due to temperature changes and loses its protective effect
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0021] The polymerization kettle is added with 3 parts by weight of distilled water, 200 parts of vinyl chloride monomer, 2 parts of calcium stearate, 0.5 parts of hexenyl bisstearamide, 5 parts of benzoyl peroxide, 0.2 parts of carbonic acid Sodium, 0.1 part of bisphenol A, the temperature is raised to 50°C to carry out polymerization reaction, the reaction time is 8 hours, and the obtained slurry is dried to obtain a finished product.
Embodiment 2
[0023] The polymerization kettle is added with 500 parts by weight of distilled water, 350 parts of vinyl chloride monomer, 10 parts of calcium stearate, 1 part of hexenyl bis stearamide, 8 parts of benzoyl peroxide, 2 parts of carbonic acid Sodium, 0.5 parts of bisphenol A, the temperature is raised to 55° C. for polymerization reaction, the reaction time is 6 hours, and the obtained slurry is dried to obtain a finished product.
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The invention discloses a low-medium density thread protector polyvinyl chloride resin production method. Raw materials comprise, by weight, 300-500 parts of distilled water, 200-350 parts of vinyl chloride monomers, 2-10 parts of calcium stearate, 0.5-1 part of dispersing agents, 5-8 parts of initiating agents, 0.2-2 parts of PH (potential of hydrogen) value adjusting agents and 0.1-0.5 part of terminating agents. The production method includes the steps: adding the raw materials into a polymerizing kettle; performing polymerization reaction for 6-8 hours at the temperature ranging from 50 DEG C to 55 DEG C; drying obtained slurry to obtain finished products. The production method has the advantage that products processed by obtained resin are relatively low in density, simple in production process and suitable for mass production.
Description
technical field [0001] The invention relates to a production method of polyvinyl chloride used in a protector for steel pipe end protection. Background technique [0002] During the transportation of the steel pipe, it is very easy to cause damage to the pipe end. In order to protect the pipe end, a pipe cap, that is, a protector, is generally placed on the pipe end. The connection between the protector and the pipe end is usually threaded connection, but when the steel pipe is hoisted and transported, it is easy to make the pipe end bear excessive impact force, which will cause great damage to the thread of the pipe end. The existing protector is made of ordinary PVC resin, and the protective cap made of it is easy to rapidly age due to temperature changes and loses its protective effect. Contents of the invention [0003] The invention provides a production method of polyvinyl chloride resin for medium and low density thread protectors. The processed protector of the ob...
Claims
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IPC IPC(8): C08F114/06C08F2/38
Inventor 李金明王新来李长建裴少鹏韩志坡
Owner 天津市津英达塑料制品有限责任公司