Thermoplastic resin composition for lamp housings, and molded articles
A technology of thermoplastic resin and composition, which is applied in the direction of headlights, lighting and heating equipment, vehicle lighting systems, etc., can solve the problems of insufficient high brightness, etc., and achieve excellent molding appearance, excellent welding, and beautiful The effect of a shiny look
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[0326] Hereinafter, although an Example is given and this invention is demonstrated in more detail, unless the summary of this invention is exceeded, this invention is not limited to the said Example. In addition, in the following, parts and % are based on mass unless otherwise specified.
[0327] 1. Evaluation method
[0328] Measuring methods related to physical properties and evaluation are as follows.
[0329] (1) Particle size and particle size distribution of acrylic rubbery polymer
[0330] The volume average particle diameter (Mv) and the number average particle diameter (Mn) of the acrylic rubber polymer in latex were measured at 25 degreeC using "Microtrac UPA150" manufactured by Honeywell Corporation. The unit is nm. The particle size distribution Mv / Mn was calculated from the measured value.
[0331] (2) Toluene swelling degree and gel content of acrylic rubbery polymer
[0332] Toluene swelling degree and gel content were calculated|required by the following ...
Synthetic example 1-1
[0392] (1) Preparation of liquid medicine
[0393] A monomer mixture (I) was prepared by mixing 91.3 parts of n-butyl acrylate (hereinafter abbreviated as "BA") and 0.7 part of allyl methacrylate (hereinafter abbreviated as "AMA").
[0394] Separately, 1 part of potassium persulfate (hereinafter abbreviated as "KPS") was dissolved in 99 parts of water to prepare a polymerization initiator aqueous solution (hereinafter abbreviated as "OXI aqueous solution (I)").
[0395] (2) The first polymerization process
[0396]150 parts of water and sodium dodecylbenzenesulfonate (hereinafter abbreviated as "SDBS" as an emulsifier) were charged into a glass reactor equipped with a stirring device, a raw material and additive adding device, a thermometer, a heating device, etc. 0.5 parts and BA8 parts. Thereafter, the reaction system was heated under a nitrogen stream while stirring the inside of the system. When the internal temperature reached 65° C., 0.03 parts of sodium dithionite ...
Synthetic example 1-2
[0402] In the first polymerization step, except for adding 0.5 parts of sodium bicarbonate, a latex containing an acrylic rubber-like polymer (a1-2) was obtained in the same manner as in Synthesis Example 1-1.
[0403] The polymerization conversion rate at the end of the first polymerization step was 97.1%, the volume average particle diameter (Mv) of the rubbery polymer particles in the obtained latex was 75 nm, and the volume average particle diameter (Mv) at the end of the second polymerization step was 157m, particle size distribution Mv / Mn is 1.04. In addition, the toluene swelling degree was 21, and the gel content was 82.0%. Table 1 shows the above results.
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