The present invention is a method of preserving plants which achieves reduced bleeding of the preservative material when the plants are subjected to elevated humidity conditions. The method comprises perfusing the plants with an aqueous preservative composition in which the preservative is primarily an alkylene oxide oligomer, 1,3-butanediol, or 1,4-butanediol. Preferred alkylene oxide oligomers are di- and polyethylene glycols in the molecular weight range of about 200-1500 and di- and polypropylene glycols with an average molecular weight below about 450. The preferred materials may be used with lesser amounts of secondary humectant materials selected from glycerol, ethylene glycol, propylene glycol, magnesium chloride or magnesium bromide hexahydrate, and water soluble cycle phosphonate esters. Plants are conventionally treated by perfusing an aqeous treatment solution into the vascular system through a cut stem or other incision which exposes the xylem. Treatment is carried out at a temperature in the range of 20.degree.-50.degree. C. at a relative humidity in the range of about 20%-80% for a period time up to about 14 days.

Weyerhaeuser Company

Method for increasing bleed resistance of preserved plants and products of the method

Provided are a cellulose resin composition which can give a cellulose ester film free from the problems with bleeding and has excellent moisture permeability, even when containing a plasticizer in a relatively large amount, and a cellulose resin film which is obtained from the cellulose resin composition. The present invention relates to a cellulose resin composition obtained by adding (A) a polyester plasticizer to a cellulose resin. The aforementioned (A) polyester plasticizer is obtained from a polybasic acid, a glycol and a stopper, wherein 70 to 30 mol % of the aforementioned polybasic acid is a succinic acid and/or an adipic acid; 30 to 70 mol % of the aforementioned polybasic acid is at least one selected from a group consisting of a terephthalic acid, a phthalic acid and an isophthalic acid; the aforementioned glycol is at least one selected from a group consisting of an ethylene glycol, a 1,2-propylene glycol, a 1,3-butanediol and a 2-methyl-1,3-propanediol; the aforementioned stopper is an acetic acid and/or a benzoic acid; and the weight-average molecular weight is 600 to 2,000.

2 3 butanediol/kraujavimas

Method for increasing bleed resistance of preserved plants and products of the method

Cellulose resin composition and cellulose resin film

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