CN85104215A

CN85104215A - Cold resistant paint for leather

Info

Publication number: CN85104215A
Application number: CN 85104215
Authority: CN
Inventors: 金泰贞
Original assignee: JILIN LEATHER RESEARCH INSTITUTE
Current assignee: JILIN LEATHER RESEARCH INSTITUTE
Priority date: 1985-05-30
Filing date: 1985-05-30
Publication date: 1986-11-26

Abstract

A kind of cold resistant paint for leather is the leather finish novel material with the resin emulsion that polyvinyl alcohol and acrylic monomer graft copolymerization make.Be applied to the leather bottom and in, the upper strata covers with paint, lacquer, colour wash, etc.Cover with paint, lacquer, colour wash, etc. low temperature resistant-30 ℃ to-40 ℃ of back, leather energy.Have good, low temperature resistant, the anti-solvent of film forming properties, water-fast, thermotolerance, performance such as wear-resisting.Polymerization technique is simple, and the advantage that raw material is easy to get is the cold-resistant coating and decorating material of a kind of leather that is applicable to extremely frigid zones.

Description

Cold resistant paint for leather

Cold resistant paint for leather is mainly used in the leather products ornamenting, existing hide finishes cover with paint, lacquer, colour wash, etc. leather general-10 ℃ to about-15 ℃ with regard to embrittlement, poor individually 0 ℃ of coating with regard to embrittlement, not low temperature resistant.Thereby, because the financial loss that leather coating embrittlement is brought is very big to the influence of leather-making enterprises economic benefit.According to nineteen eighty-three Jilin Province's leather industry incomplete statistics, the leather that produces broken face reaches tens0000 square chi, causes nearly 300,000 yuan of financial loss.Cold resistant paint for leather, low temperature resistant-40 ℃ of its film energy, the leather after the covering with paint-30 ℃ extremely-40 ℃ of not embrittlement have reduced above-mentioned financial loss.After cold resistant paint is gone into operation, by producing 200 tons of calculating per year, about 200,000 yuan of the profits of can making a profit.

Main points of the present invention are that the mechanism of cold resistant paint for leather mainly is to utilize the characteristic reaction of polyvinyl alcohol hydroxyl and the acroleic acid resin advantages of modification both at home and abroad, at first screen appropriate acrylic monomer and give polymerization, graft copolymerization then, again through appropriately crosslinked method, change polyvinyl alcohol structures, improve the graft copolymer resistance to low temperature, reduced the viscosity of emulsion again, satisfied the requirement of leather finish technology.To the proportioning raw materials of cold resistant paint, polymerization and processing parameter have carried out repeatedly screening application test, and the finished product that various conditions make has carried out application test, has selected preferred plan.Can low temperature resistant-40 ℃ with the prepared cold resistant paint for leather film of this mix proportion scheme, the leather after the covering with paint can low temperature resistant reaching-30 ℃ to-40 ℃, have cold-resistant preferably, thermotolerance, anti-solvent, water-fast, performance such as wear-resisting.Prove that by the research application test polyvinyl alcohol and acrylic monomer graft copolymerization can improve resistance to low temperature, thereby determined cold resistant paint for leather manufacturing process prescription.

One. brief description of the process:

Distilled water and sodium lauryl sulphate (being abbreviated as Na, L, S) added in 1000 milliliters of four-hole boiling flasks that have stirring rising temperature for dissolving gradually.When temperature rises to 75 ℃, with butyl acrylate (BA), vinyl cyanide (AN), acrylamide (AAM), the formaldehyde (CF) and ammonium persulphate (APS) aqueous solution splash in the four-hole boiling flask in phase, and temperature of reaction is controlled at below 95 ℃, gives polymerization 2～3 hours.To give polymer temperature and drop to 60 ℃～70 ℃, to give dissolving earlier good polyvinyl alcohol (PVA) aqueous solution and butyl acrylate (BA) then, vinylformic acid (AA) adding is given and is carried out graft copolymerization 3～4 hours in the polymkeric substance, append ammonium persulphate (APS) therebetween, after reaction is finished, promptly get the oyster white resin emulsion, with material by pouring out filtration in the four-hole boiling flask, residue is removed, and filters the resulting emulsion in back, is exactly the cold resistant paint for leather emulsion.

Two. technical recipe and polymerizing condition:

Giving polymerizing condition is that temperature of reaction is 75 ℃～95 ℃, and the reaction times is 2～3 hours.

The proportioning of polymerization single polymerization monomer be BA account for weight 18.2%, AAM accounts for 1.0～1.5% of weight, CF accounts for 0.5～1.5% of weight, AN accounts for 1.8% of weight, APS accounts for 0.033～0.066% of weight, and Na, L, S account for 0.182～0.36% of weight, and distilled water accounts for 76～77% of weight.

Conditions of graft copolymerization is that temperature of reaction is 60 ℃～70 ℃, and the reaction times is 3～4 hours.

The graft copolymerization monomer ratio be PVA account for weight 1.5～2.0%, BA accounts for 0.8% of weight, AA accounts for 0.2% of weight, APS accounts for 0.04～0.06% of weight.

Cold resistant paint for leather of the present invention is a kind of resin emulsion that makes with polyvinyl alcohol and acrylic monomer graft copolymerization, is the leather finish novel material.Be applied to the leather bottom and in, the upper strata covers with paint, lacquer, colour wash, etc.After the covering with paint, leather can be low temperature resistant-30 ℃ to-40 ℃ to have a film forming properties good, low temperature resistant, not embrittlement, polymerization technique is simple, the advantage that raw material is easy to get is to be applicable to a kind of leather of extremely frigid zones coating and decorating material that resists cold.

Claims

1, the resin emulsion that makes with polyvinyl alcohol and acrylic monomer graft copolymerization of a kind of cold resistant paint for leather, it is characterized in that it also contains PVAC polyvinylalcohol, butyl acrylate BA, vinylformic acid AA, vinyl cyanide AN, formaldehyde CF, acrylamide AAM, ammonium persulphate APS, sodium lauryl sulphate Na, L, S, distilled water.

2, a kind of according to the described cold resistant paint for leather of claim 1, it is characterized in that the polymerizing condition that gives that contains is: BA accounts for 1.82% of weight, AAM accounts for 1.0～1.5% of weight, CF accounts for 0.5～1.5% of weight, AN accounts for 1.8% of weight, APS accounts for 0.033～0.066% of weight, and Na, L, S account for 0.182～0.36% of weight, and distilled water accounts for 76～77% of weight.Temperature of reaction is 75 ℃～95 ℃, and the reaction times is 2～3 hours.

3, a kind of according to the described cold resistant paint for leather of claim 1, it is characterized in that the conditions of graft copolymerization that is contained is: PVA accounts for 1.5～2.0% of weight, BA accounts for 0.8% of weight, AA accounts for 0.2% of weight, APS accounts for 0.04～0.06% of weight, temperature of reaction is 60 ℃～70 ℃, and the reaction times is 3～4 hours.