Outdoor degradable hydrocarbon plastic

Abstract

Abstract 1. AN ULTRAVIOLET DEGRADABLE PLASTIC ARTICLE CONSISTING ESSENTIALLY OF: (A) 100 PARTS BY WEIGHT OF HYDROCARBON RESIN CONSISTING OF ALT LEAST 65% OF THE MONOMERS PROPYLENE, BUTYLENE, PENTENE OR HEXENE CONTENT, SAID RESIN BEING A HOMOPOLYMER OF ONE OF SAID MONOMERS, AN INTERPOLYMER OF TWO OR MORE OF SAID MONOMERS, OR AN INTERPOLYMER OF ONE OR MORE OF SAID MONOMOERS WITH UP TO 35% ETHYLENE; (B) FROM A MINIMUM IN THE RANGE OF 0.1 TO 1 PART TO A MAXIMUM IN THE RANGE OF 8-15 PARTS BY WEIGHT OF A U.V. SENSITIZER-PROMOTER SELECTED FROM THE GROUP CONSISTING OF (1) OXIDES OF THE ELEMENTS SILICON, TIN, LEAD, ALUMINUM, BISMUTH, ANTIMONY AND MAGNESIUM; AND OXIDES OF SAID ELEMENTS DISPERSED BY FATTY OR ROSIN ACID; (2) SILICATES OF GROUP IIA OF THE PERIODIC TABLE; SILICATE OF ALUMINUM, BISMUTH, ANTIMONY, TIN, AND LEAD; AND SILICO ALUMINATES OF GROUP IA; (3) SULFATES OF BARIUM, STRONITIUM, CALCIUM AND LEAD; AND BASIC SULFATES OF BISMUTH AND ANTIMONY; (4) CARBONATES OF GROUP IIA; AND CARBONATES OF ALUMINUM, TIN, LEAD, BISMUTH AND ANTIMONY; (5) PHOSPHATES OF GROUP IIA; AND PHOSPHATE OF ALUMINUM, TIN, LEAD, BISMUTH AND ANTIMONY; (6) FATTY ACID METAL SALTS WHEREIN THE METAL IS ALUMINUM, TIN, LEAD, ANTIMONY, BISMUTH OR A METAL OF GROUP IIA OR GROUP IIB OF THE PERIODIC TABLE, AND THE FATTY MOIETY IS OLEIC ACID OR AN ACID MOIETY OF THE FORMULA -OOC-(CH2)3- AND WHEREIN SAID ARTICLE IS ESSENTIALLY U.V. TRANSPARENT AND HAS A MAXIMUM THICKNESS OF ABOUT 80 MILS. A=10.2.44 (REFRACTIVE INDEX MINUS 1.564)M.2/GM.; SAID SENSITIZER-PROMOTER HAVING A VERY FINE PARTICLE SIZE NO GREATER THAN 3.4U AND SUFFICIENTLY FINE TO PROVIDE AN EXTERNAL SURFACE AREA NO LESS THAN 0.7 M.2/GM. OF SAID SENSITIZER-PROMOTER, AND-FOR MEMBERS OF THE GROUPS (1) TO (5) HAVING A REFRACTIVE INDEX GREATER THAN 1.564-SUFFICIENTLY FINE SO THAT THE SURFACE AREA OF THE SENSITIZER PROMOTER PARTICLES IS AT LEAST EQUAL TO 0.020 (THICKNESS OF ARTICLE IN THOUSANDTHS OF AN INCH) 15-17.1 (REFRACTIVE INDEX MINUS 1.7) TIMES SAID MINIMUM QUANTITY BEING 1 PART BY WEIGHT FOR SAID GROUPS (1) TO (5) AND SUFFICIENT TO PROVIDE A SURFACE AREA PER 100 GRAMS OF RESIN OF AT LEAST 10 M.2, AND BEING 0.1 PARTS BY WEIGHT FOR SAID GROUP (6); SAID MAXIMUM QUANTITY OF GROUP 86) BEING 15 PARTS BY WEIGHT AND OF GROUP (1) TO (5) BEING DETERMINED BY THE U.V. SCREENING POWER OF SAID SENSITIZER-PROMOTOR AS DETERMINED FROM THE REFRACTIVE INDEX ACCORDING TO THE FORMULA:

Inventors

• 👤 R White
• 👤 S Margosiak

Bibliographic Details