Leather production
OwnerJonathan Dayinventor
Life of this patent
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Abstract
Application to leather of various leather treatment agents, in particular dyes, is improved by the use of materials such as substantially linear surfactants having amphoteric head groups.
Claims32
Use of a material of formula (I) in the production of leather:
- R1—(R2—)n (R3—)m R4 (I)
- in which:
- R1 represents a substituted or unsubstituted group having a C8 to C18 backbone;
- R2 represents a NHCO group;
- R3 represents a substituted or unsubstituted group having a C2 to C8 backbone;
- R4 represents an amine oxide, sulphonate, phosphate or betaine group;
- n is 0 or 1;
- and
- m is 0 or 1.
Use according to any preceding claims, in which R1 is an alkyl group.
Use according to any preceding claim, in which R4 is amphoteric.
Use according to any preceding claim, in which R4 is a group of formula (II):
- 2
- in which each of R5 and R6, which may be the same or different, is a straight or branched alkyl group having from 1 to 4 carbon atoms, and a is 0 or 1.
Use according to any preceding claim, for the incorporation into and/or onto the leather of one or more leather treatment agents.
Use according to any preceding claim, in which the material of formula (I) is applied to the leather by:
- hand or machine padding,
- roller coating,
- curtain coating,
- through feed roller application,
- drumming,
- spraying, or
- dip coating.
Use according to any preceding claim in which a UV absorber is applied to the leather before, simultaneously with, or after application to the leather of the material of formula (I).
Use according to any preceding claim, in which the material of formula (I) serves to cause swelling of collagen of the leather by disrupting hydrogen bonds between collagen chains.
Use according to any preceding claim, in which the material of formula (I) serves to increase the effective number of binding sites for leather treatment agents.
Use of a substantially linear surfactant having an amphoteric head group in the production of leather.
Use according to any preceding claim, wherein the material of formula (I) or the surfactant as the case may be serves to cause swelling of collagen of the leather by disrupting hydrogen bonds between collagen chains and/or to increase the effective number of binding sites for leather treatment agents.
A substantially linear surfactant having an amphoteric head group for use in the production of leather.
Dependencies are inferred from the claim text.