Silicone composition and a paper treatment agent comprising the same

Abstract

Composition comprising: 100 parts by weight of an organopolysiloxane (A), 0.1 to 30 parts by weight of a crosslinking agent (B), 50 to 1,000 parts by weight of a polyvinyl alcohol homopolymer or copolymer (C), 0 to 5 parts by weight, as an active ingredient, of a catalyst (D), 100 to 100,000 parts by weight of water (E), and 0.1 to 100 parts by weight of a surfactant (F), wherein component (A) is an organopolysiloxane (A3) having at least two alkenyl groups and represented by the following formula (3): wherein each R1 may be same or different and is a group having 1 to 20 carbon atoms selected from the group consisting of alkyl groups, alicyclic groups, and aryl groups, whose hydrogen atoms bonded to the carbon atoms may partly be replaced with a halogen atom or a cyano group, R2 is an alkenyl group and X3is the group represented by the following formula: wherein a3, b3, c3, d3 and e3 are such numbers that the organopolysiloxane (A3) has a viscosity at 25 degrees C of from 0.05 to 500 Pa·s, and b3, c3,d3 and e3 may be zero, and α and β are integers of from 0 to 3 and component (B) is an organohydrogenpolysiloxane (B3) having at least three SiH groups per molecule.

Description

CROSS REFERENCES [0001] The present application is a 37 C.F.R. § 1.53(b) divisional of U.S. application Ser. No. 10 / 762,462 filed Jan. 23, 2004, which in turn claims benefits of Japanese Patent application No. 2003-016621 filed on Jan. 24, 2003, Japanese Patent application No. 2003-022759 filed on Jan. 30,2003, Japanese Patent application No. 2003-356119 filed on Oct. 16, 2003, and Japanese Patent application No. 2003-357041 filed on Oct. 16, 2003. The contents of each of those applications are incorporated by reference in this application.FIELD OF THE INVENTION [0002] This invention relates to a silicone composition and a paper treatment agent comprising the composition which is suitable to provide a paper substrate with water repellency and oil repellency. DESCRIPTION OF THE PRIOR ART [0003] Wrapping paper for food, food containers, and cooking paper are provided with water repellency, oil repellency to prevent oily or aqueous ingredients of the food from permeating the paper to s...

AI Technical Summary

Benefits of technology

"The present invention is a composition that can be used to make paper with good water repellency, oil repellency, and non-tackiness. The composition comprises an organopolysiloxane and a polyvinyl alcohol homopolymer or copolymer in a specific ratio, along with a crosslinking agent, a catalyst, water, and a surfactant. The composition can be applied to paper by mixing it with paper and curing it. The resulting paper has improved properties compared to paper treated with compounds containing perfluoroalkyl groups and does not contain any organic solvents, making it more environmentally friendly. The composition can also be easily recycled and has a lower burden on the environment."

Problems solved by technology

However, use of the aliphatic fluorohydrocarbon atoms is restricted because they are ozone-depleting or globe-warming substances.

Use of fluorine compounds having similar structures as the aliphatic flurohydrocarbon atoms may be restricted in the near future due to environmental concerns.

On the other hand, it is difficult for the resin to give water repellency or non-tackiness due to its hydrophilicity.

However, the former is hydrophobic and the latter is hydrophilic, so that it is difficult to obtain a homogeneous or a stable mixture merely by mixing the both.

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