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US 4,212,786 AGranted
Crayon compositions
AssigneeSakura Color Products Corporation
InventorKimio Murakami
Life of this patent
Estimating the term…
Abstract
A crayon composition of this invention comprises (a) at least one of cellulose resin and vinyl resin, (b) at least one of ketone resin, xylene resin, amide resin and terpene resin, (c) at least one of dibenzylidene sorbitol, tribenzylidene sorbitol and derivatives of the sorbitols, (d) at least one of glycols, ethers of glycols, ether esters of glycols and benzoic acid esters, and (e) a pigment or an oil-soluble dye.
Claims21
A drawing crayon composition comprising, per 100 parts by weight of the composition,
- (a) 10 to 30 parts by weight of at least one member selected from the group consisting of an ester of cellulose, ether or cellulose, polyvinyl butyral, polyvinyl acetate and ethylenevinyl acetate copolymer,
- (b) 5 to 30 parts by weight of at least one member selected from the group consisting of a condensation product of cyclohexanone and formaldehyde, a condensation product of meta-xylene and formaldehyde, a condensation product of meta-xylene and formaldehyde which product is modified with an alkyl phenol having C.sub.1-6 alkyl, an amide resins prepared by the condensation polymerization of dimer acide and di- or poly-amine, a synthetic terpene resin prepared from turpentine oil, a synthetic terpene resin prepared from an unsaturated hydrocarbon and a terpene-phenol copolymer,
- (c) 2 to 12 parts by weight of at least one dibenzylidene sorbitol, tribenzylidene sorbitol and derivatives of the sorbitols,
- (d) 25 to 60 parts by weight of at least one of glycols, ethers of glycols, ether esters of glycols and benzoic acid esters, and
- (e) 20 to 30 parts by weight of a pigment or 2 to 10 parts by weight of an oil-soluble dye.
2 more elements
Dependencies are inferred from the claim text.