Super durable Watar-repellent finish

Super water repellent finish for cotton fibre　/　Fluorinated resin

PARAGUARD 600W

In water repellent finish for cotton fibre, a flurochemical-based water repellent is　a primary agent with which an isocianated crosslinker is used as a secondary so that the washing resistance might be improved. Our new development is to produce tremendous washing resistance by adding third component of a special reactive resin (agent comprising of a number of reactive functions in its molecular chains).

Features

1. Superior washing resistance
2. No yellowing occur on exposure to nitrogen oxides (NOx)

Mechanism of durable water repellency

Special reactive resin offers the following structure and advantages to improve the durability of water repellency:

＜Structure of special reactive resin＞
1. High molecule (copolymer)
2. Main chain structure is similar to that of fluorinated resin
3. Side chains have a number of reactive functions　which combine with hydroxy groups on the cellulose fibre

＜Formation of super water repellency＞
1. Special reactive resin has side chains with a number of reactive groups that combine with hydroxy groups on the cellulose fibre, by which the main chain of reactive resin is attached to cellulose fibre surface
2. The main chain of special reactive resin and fluorinated resin has great affinity each other, which contact each other as sandwiching cellulose fibre. i.e., layers of special reactive resin and fluorinated resin surround cellulose fibre.
3. By such contact between fluorinated resin, cellulose, and special reactive resin, cross-links are formed.
4. Such cross-links strengthen the bond between fluorinated resin and cellulose fibre, which might be resistant to physical strains in laundering

Method of application and Water repellency performance

1. Standard recipe
　　　PARAGUARD 600W 7 % soln.
　　　PARARESIN WR-S 5 % soln.
　　　CATALYST S 3 % soln.
2. Standard process conditions
　　　Dipping → Nipping → Drying → Curing (170℃ x 2 min.)
3. Test method　　
　　　Water repellency : JIS L-1092 spray method
　　　Oil repellency : AATCC-188 method
　　　Laundry : JIS L-0217 method, natural dry

	super water repellent finish		ordinary water repellent finish
	water repellency	oil repellency	water repellency	oil repellency
HL-0	5	7	5	6-7
HL-10	5	5	4	3
HL-20	4-5	4	3-4	2-3
HL-30	4	3-4	3	0

Physical properties

　　　Appearance : Yellowish milky white emulsion
　　　Main component : Fluorinated resin
　　　Ionic status : Weakly cationic
　　　pH : 3.0±1.0
　　　Viscosity : 100 mPa.s or less
　　　Solubility : Soluble in water

Precautions

Information herein offered is based our best knowledge through thorough experiments. However, it is recommended to conduct preliminary tests before practical use.