초록 ▼

A protective covering material for use such as shingles and siding is primarily composed of a formulation of polyvinyl chloride resin and plasticizer which is mixed with vermiculite is disclosed. The plasticized polyvinyl chloride formulation is approximately composed of 81.5 parts of polyvinyl chlo

A protective covering material for use such as shingles and siding is primarily composed of a formulation of polyvinyl chloride resin and plasticizer which is mixed with vermiculite is disclosed. The plasticized polyvinyl chloride formulation is approximately composed of 81.5 parts of polyvinyl chloride resin suspension polymer, 23.5 parts plasticizer Di-2-ethylhexyl phthalate, 2.75 parts epoxidized soybean oil, 1.25 parts barium calcium and 1 part copper sulphate. The formula and ingredients and vermiculite are mixed and subsequently heated until they reach a liquid state, whereupon as a mixture they are extruded into sheet-like form and chill-rolled. After the sheet of the combined formulation and vermiculite reach the proper temperature, the sheet is cut into the desired configuration for roofing shingles or other protective covering materials.

대표청구항 ▼

A protective covering material useful as roofing or siding material comprising: (a) a formulation of 100 parts by weight of the following ingredients: 64 to 80 parts by weight percent of a total 100 of polyvinyl chloride resin; and 20 to 36 parts by weight percent of a total 100 of plasticizer; (b)

A protective covering material useful as roofing or siding material comprising: (a) a formulation of 100 parts by weight of the following ingredients: 64 to 80 parts by weight percent of a total 100 of polyvinyl chloride resin; and 20 to 36 parts by weight percent of a total 100 of plasticizer; (b) the said formulation of polyvinyl chloride resin and plasticizer is admixed as 60 to 90 parts by weight percent of a total 100 with 40 to 10 parts by weight percent of vermiculite.