Cleaning Emulsion Polymerization Equipment Fouled by Synthetic Rubber Latex

1953 ◽  
Vol 45 (9) ◽  
pp. 1896-1898 ◽  
Author(s):  
J. S. Nettleton ◽  
M. J. G. Davidson ◽  
H. Leverne Williams
Keyword(s):  
Emulsion Polymerization ◽  
Rubber Latex ◽  
Synthetic Rubber

scholarly journals Alternative of bone china and porcelain as ceramic hand molds for rubber latex glove films formation via dipping process

2020 ◽  
Vol 59 (1) ◽  
pp. 523-537
Author(s):  
Chaturaphat Tharasana ◽  
Aniruj Wongaunjai ◽  
Puwitoo Sornsanee ◽  
Vichasharn Jitprarop ◽  
Nuchnapa Tangboriboon
Keyword(s):  
Thermal Expansion ◽  
Flexural Strength ◽  
Thermal Expansion Coefficient ◽  
Expansion Coefficient ◽  
Mold Surface ◽  
Rubber Latex ◽  
Latex Glove ◽  
Bone China ◽  
Synthetic Rubber ◽  
Natural And Synthetic

AbstractIn general, the main compositions of porcelain and bone china composed of 54-65%wt silica (SiO2), 23-34% wt alumina (Al2O3) and 0.2-0.7%wt calcium oxide (CaO) suitable for preparation high quality ceramic products such as soft-hard porcelain products for teeth and bones, bioceramics, IC substrate and magneto-optoelectroceramics. The quality of ceramic hand mold is depended on raw material and its properties (pH, ionic strength, solid-liquid surface tension, particle size distribution, specific surface area, porosity, density, microstructure, weight ratio between solid and water, drying time, and firing temperatures). The suitable firing conditions for porcelain and bone china hand-mold preparation were firing at 1270°C for 10 h which resulted in superior working molds for making latex films from natural and synthetic rubber. The obtained fired porcelain hand molds at 1270°C for 10 h provided good chemical durability (10%NaOH, 5%HCl and 10%wtNaCl), low thermal expansion coefficient (5.8570 × 10−6 (°C−1)), good compressive (179.40 MPa) and good flexural strength (86 MPa). While thermal expansion coefficient, compressive and flexural strength of obtained fired bone china hand molds are equal to 6.9230 × 10−6 (°C−1), 128.40 and 73.70 MPa, respectively, good acid-base-salt resistance, a smooth mold surface, and easy hand mold fabrication. Both obtained porcelain and bone china hand molds are a low production cost, making them suitable for natural and synthetic rubber latex glove formation.

Synthetic rubber latex

1946 ◽  
Vol 241 (4) ◽  
pp. 309-310
Author(s):  
R.H.O.
Keyword(s):  
Rubber Latex ◽  
Synthetic Rubber

Recent Developments in Synthetic Rubber Latex

1961 ◽  
Vol 34 (5) ◽  
pp. 1501-1520 ◽  
Author(s):  
L. H. Howland ◽  
R. W. Brown
Keyword(s):  
Amino Groups ◽  
Rubber Latex ◽  
Low Viscosity ◽  
Polar Groups ◽  
Synthetic Rubber ◽  
Polymerization System ◽  
Recent Developments ◽  
The Government ◽  
Solids Content ◽  
Made In

Abstract Progress has proceeded at a good rate since the close of the Government Program in the spring of 1955. Improved latexes have been made, and the technology of manufacture and of application has advanced. Also progress has been made in fundamental latex research. Some of the newer latexes representing the more important advances are those involving functonal groups derived from the use of unsaturated monomers such as those containing amino groups and carboxy groups in the polymerization system, those from solid rubbers by the solvent emulsion technique, and those of higher solids content including the agglomerated latexes giving 68 per cent minimum solids at low viscosity. Some of the applications of greatest growth are : 1. Carpet backing involving both sulfur curing and so-called self-curing (noncured) elastomer latexes. The latter obtain strength from polar groups including functional (carboxyl) groups and/or fairly high styrene content. 2. Foam sponge backed carpets. In 1954 it was suggested that synthetic rubber latexes would have a permanent place in our economy. This has now come to pass, and natural latex is decreasing in volume compared to total synthetic rubber latex consumption. It now appears that by forming a latex from cis polyisoprene (synthetic natural rubber) and adding it to our list of latexes, that our country could probably become independent of the natural product.

Aqueous Phase Diluents in Emulsion Polymerization of Synthetic Rubber

1953 ◽  
Vol 45 (12) ◽  
pp. 2738-2742
Author(s):  
L. H. Howland ◽  
J. A. Reynolds ◽  
R. W. Brown
Keyword(s):  
Emulsion Polymerization ◽  
Aqueous Phase ◽  
Synthetic Rubber

A Study of Synthetic Rubber Latexes by the Electron Microscope

1962 ◽  
Vol 35 (4) ◽  
pp. 1028-1040 ◽  
Author(s):  
W. Rupar ◽  
J. M. Mitchell
Keyword(s):  
Electron Microscope ◽  
Size Distribution ◽  
Emulsion Polymerization ◽  
Polymer Particles ◽  
Latex Particles ◽  
Synthetic Rubber ◽  
Unreacted Monomer ◽  
Colloidal Behavior

Abstract In emulsion polymerization the number and size of the latex particles govern not only the colloidal behavior of the reacting system but also the rate at which conversion of the monomer progresses. Because of the importance of these factors a wide variety of synthetic latexes have been studied with the electron microscope. The changes in the latex particles—from swollen monomer-polymer particles at low conversion to the final latex particles after removal of the unreacted monomer—have been observed for a typical SBR system. The effects of various post polymerization treatments on the size and size distribution of the latex particles have also been observed.

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