US2350782A - Greasing agent - Google Patents

Description

Patented June 6, 1944" UNITED" STATES assess:

PATENT, orrics GREASING aonn'r Gustav Hetz, Ohemnitz, Germany; vested in the Alien Property Custodian No Drawing. Application March 24, 1941, Serial No. 384,803. In Germany March 6, 1940 Claims.

has also been proposed to use glycerol or diethylene glycol instead of the usual greasing agents based on fatty acid, fatty oils or mineral oils.- Glycerol and diethylene'glycol give a certain slip to the -iibers to be spun, however these agents are not able to retain moisture sumciently and to produce suflicient adhesion between the singliiaifibers oi the spun thread. These drawbacks are important especially when cellulose staple fiber or regenerated wool or waste, which contains many short iiberaare admixedto the spinhing material. Compared, with oleic acid; glyc-, erol and diethylene glycol have the drawback, that they have themselves no washing and fulling power. r

v It has now been found, that mixtures of watersoluble, bivalent or polyvalent aliphatic alcohols or ether alcohols or of water-soluble high-boiling hydroaromatic or heterocyclic alcohols on the one side and of water-soluble salts of cellulose ether carbonic acids, which can also be called cellulose n-butyl-glycerol ether and its homologues. How- I ever, also alcohols of lower viscosity, for example cyclohexanol or tetrahydrofurfuryl alcohol, are suitable. Instead of pure alcohols there may be used technical mixtures containing such al- 0011015 for example the mixtures received by catalytic hydrogenation of sugars, These mixtures contain, mostly or in a high percentage, propane cellulose hydroxyparaflin monocarboxylic acids,

can be used. 1

In somecases the 'eflect of the greasing agents 55 can be improved by an addition 01 alkali salts.

of lignin-sulfonic'acid.

- The new greasing agents advantages! 5 .(1) Far better retaining of moisture during the spinning process.

show the following (2) They produce good adhesion between the singular fibers in the spun thread; this is particularly important when waste containing short iibers is spun. (3) Easier processing as compared vices are unnecessary. V (4) Only approximatelyv one-half of the greasing agents according to the invention is I necessary as compared with. the greasills The proportion between the alcohol or ether alcohol and the cellulose ether carboxylic acid can 25 be in the range between 3:1 and 1:3, that is to say, that one may use for example '15 parts by ,weight' 01' alcohol or ether alcohol and 25 parts by weight oi a salt of a cellulose ether carboxylic acid, or vice versa. It also ligninsulfonic acid is so used, the sumoi the weights of alcohol or ethera and cellulose ether carboxylic acid salt b can be between 75 percent to percent'of the total weight, the weight ,of the ligninsulfonig acid being 25 to 75 percent 01 the total weight. The proportion between alcohol or ether alcohol and the salt of-cellulose ether carboxylic acid in the greasing agents containing also ligninsulfonic acid may likewise be inthe range between 3:1

and 1:3.

cases to be very advantageous (the parts are by weight) Parts (1) Technical propandiol 86'! Sodium salt of cellulose glycoliic acid--- 133 (2). Technical propendiol 517 Sodium salt of technical ligninsulionic acid 345 Sodium salt oicellulose glycoliic acid; 138 so (3) A technical mixture of glycols made by catalytic hydrogenation of glucose at high pressure"; 517 Sodium salt or technical ligninsulionic acid 345 Sodium salt of cellulose glycoliic acid 138 with my" emulsions, as all auxiliary agents and de- The following proportions have proved in many a,sso,7sa I aromatic and heterocyclic alcohols, water-soluble According to the spinning method and to the character of the fibers to be spun, 0.5% to 5% of the water-iree' greasing agent, calculated on the weight oi. the fibers. are dissolved in the necessary quantity oi cold or warm water, that is approximately 4 to 10 times the amount ot the water-free greasing agent. The solution is distributed finely and uniformly on the fibers either by hand or by 'a suitable sprinkling device. The greased batch of fibers is then mixed in a mixingwillow. Inthe worsted-spinning process, the solution of the greasing agent is drizzled or sprinkled on the silver in the usual manner.

The greasing agents can be used for greasing fibers oi any kind before spinning. 'For example,

they can be used in the manufacture of army-- cloth, oi blankets made of wool or its substitutes,

in the spinning of hair yarn, carpet yarn, in the spinning of vicugna or waste fibers using the cardspecial yarns. The application of the greasing I claim:

1. Ina process for greasing fibers beiore spin- I ning, the use of a mixture comprising a compound selected irom the group consisting oi'bivalent and polyvalent aliphatic alcohols and ing process and in the worsted-spinning process for making yarns ior weaving, knitting and.

salts of cellulose hydroxyparafiin monccarboxylic acids, and water-soluble salts of ligninsultonic acid.

2. In a process 0! greasing fibers beiore ning, the use of a mixture comprising technical propandiol a, and the sodium salt of cellulose glycollic acid b, and the'sodium salt oi technical ligninsulfonic acid 0, proportion of o to b being from 3:1 to 1:3 and; the proportion between (1+1; and 0 being from 3:1 to hit.

3. A greasing agent for fibers, comprising a mixture of acomp'ound selected from the group consisting of bivalent and polyvalent aliphatic alcohols and ether alcohols, water-soluble high boiling hydroaromatic' and heterocyclic alcohols, a water-soluble salt of a cellulose hydroxyparamn monocarboxylic acid, and a water soluble salt of ligninsuli'onic acid.

4. A greasing agent comprising a mixture of technical glycols', made by catalytic hydrogenation of sugars at high pressure, the sodium salt of cellulose glycollic acid, sodium salt oi ligninsulionic acid, the ratio being approximately (by'welght) 52 parts technical glycols, 14 parts sodium salt of cellulose glycollic acid, and}! parts of the sodium salt or ligninsulionic acid.

- 5. A greasing agent as claimed in claim 4, disso solved in water.

- GUSTAV m.

spin-