Resin composition for articles molded by injection molding for p

Details Resin composition for articles molded by injection molding for p Resin composition for articles molded by injection molding for p

1988-03-02

1993-07-06

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524423, 524427, 524437, 524433, 524445, 524449, 524536, 524232, C08J 515

Patent

active

052254666

ABSTRACT:
Resin compositions for use in molding articles by injection molding comprise 50 to 90 wt. % of polypropylene resin, 9 to 48.5 wt. % of linear low density polyethylene resin, 0.05 to 15 wt. % of light-shielding material, 0.05 to 40 wt. % of reinforcing material, 0.05 to 6 wt. % of lubricant, and oxidation inhibitor present in an amount of less than 0.5 wt. %. These resin compositions display very little mold shrinkage and have excellent size accuracy. They also have outstanding rigidity, physical strength, heat resistance, wear resistance and slipping characteristics. They are readily molded by injection molding, and are relatively inexpensive. Articles molded from the resin compositions according to the invention are well adapted for use as photographic photosensitive materials.

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