Antimicrobial lubricant for wood fiber-plastic composites
AssigneeLonza Ltd.
InventorsXiao Jiang, Ahmed M. Tafesh, Joseph B. Williams, Howard A. Cash, Kenneth S. Geick
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Abstract
The invention relates to a polymer-cellulosic fiber composition comprising a polymer, a cellulosic fiber, and a quaternary ammonium alkyl salt wherein the latter imparts antimicrobial properties to the composition and functions as a lubricant during the formation of the composition. The quaternary ammonium alkyl salts may be alkyl carboxylate, alkyl sulfate, alkyl sulphonate, alkyl phosphate, or alkyl phosphite. Certain of the salts are new compositions of matter. The method of extruding and the extrudate are also claimed.
Claims12
A polymer-cellulosic fiber composition comprising from about 30 to about 70 wt. % polymer, from about 70 to about 30 wt. % cellulosic fiber, and from about 1 to about 7 phc of a quatemary ammonium alkyl salt having the formula:
- wherein X is an alkanecarboxylate O—C(O)R, alkyl sulfate OS(O)2OR, alkanesulfonate OS(O)2R, alkyl phosphate OP(O)(OH)OR, (O-) alkyl phosphonate OP(O)(H)—OR;
- R is an alkyl group having from 8 to 22 carbon atoms, and R1 is a long chain alkyl group or a benzyl group and,
- where the R1 group is a long chain alkyl group, R2 and R3 are short chain alkyl groups and R4 is a short or long chain alkyl group and,
- where R1 is a benzyl group, R2 is a short chain alkyl group and R3 and R4 are each either short or long chain alkyl groups;
- said long chain alkyl groups having from 8 to 22 carbon atoms and said short chain ally groups have from 1 to 4 carbon atoms.
A polymer-cellulosic fiber composition consisting of from about 30 to about 70 wt. % polymer, from about 70 to about 30 wt. % cellulosic fiber, and from about 1 to about 7 phc of a quaternary ammonium alkyl salt having the formula:
- wherein X is an alkanecarboxylate O—C(O)R, alkyl sulfate OS(O)2OR, alkanesulfonate OS(O)2R, alkyl phosphate OP(O)(OH)OR, (O-) alkyl phosphonate OP(O)(H)—OR;
- R is an alkyl group having from 8 to 22 carbon atoms, and R1 is a long chain alkyl group or a benzyl group and,
- where the R1 group is a long chain alkyl group, R2 and R3 are short chain alkyl groups and R4 is a short or long chain alkyl group and,
- where R1 is a benzyl group, R2 is a short chain alkyl group and R3 and R4 are each either short or long chain alkyl groups;
- said long chain alkyl groups having from 8 to 22 carbon atoms and said short chain ally groups have from 1 to 4 carbon atoms.
Dependencies are inferred from the claim text.