The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland

The Secretary of State for Defence in Her Britannic Majesty's Government

The Secretary of State for Defence

P2i Limited

Stuart Anson Brewer

Colin Robert Willis

Stephen Richard Coulson

Jas P S Badyal

Corinne Amy Stone

Brian Alan Beadle

Brian G Jones

Jas Pal Singh Badyal

A method of coating a surface with a polymer layer, which method comprises exposing said surface to a plasma comprising a monomeric unsaturated organic compound which comprises a chain of carbon atoms, which are optionally substituted by halogen; provided that where the compound is a perhalogenated alkene, it has a chain of at least 5 carbon atoms; so as to form an oil or water repellent coating on said substrate. Suitable compounds for use in the methods are compounds of formula (I) where R, Rand Rare independently selected from hydrogen, alkyl, haloalkyl or aryl optionally substituted by halo; provided that at least one of R, Ror Ris hydrogen, and Ris a group X&#x2014;Rwhere Ris an alkyl or haloalkyl group and X is a bond; a group of formula &#x2014;C(O)O(CH)Y&#x2014; where n is an integer of from 1 to 10 and Y is a bond or a sulphonamide group; or a group &#x2014;(O)R(O)(CH)&#x2014; where Ris aryl optionally substituted by halo, p is 0 or 1, q is 0 or 1 and t is 0 or an integer of from 1 to 10, provided that where q is 1, t is other than 0. The method is particularly useful in the production of oil- and/or water repellent fabrics.

Surface coatings

The invention provides use of a polymer composition comprising polyethylenimine and one or both of polyvinyl alcohol and polyvinyl alcohol co-ethylene for protection against harmful and/or noxious agents. The invention further provides a laminate suitable for providing protection against harmful and/or noxious agents, the laminate comprising a layer of a polymer composition comprising polyethylenimine and one or both of polyvinyl alcohol and polyvinyl alcohol co-ethylene is also disclosed.

Polymers for water-permeable protective materials

A method of coating a surface with a polymer layer, which method comprises exposing said surface to a plasma comprising a monomeric unsaturated organic compound which comprises a chain of carbon atoms, which are optionally substituted by halogen; provided that where the compound is a perhalogenated alkene, it has a chain of at least 5 carbon atoms; so as to form an oil or water repellent coating on said substrate. Suitable compounds for use in the methods are compounds of formula (I) where R , R and R are independently selected from hydrogen, alkyl, haloalkyl or aryl optionally substituted by halo; provided that at least one of R , R or R is hydrogen, and R is a group X&mdash;R where R is an alkyl or haloalkyl group and X is a bond; a group of formula &mdash;C(O)O(CH ) Y&mdash; where n is an integer of from 1 to 10 and Y is a bond or a sulphonamide group; or a group &mdash;(O) R (O) (CH ) &mdash; where R is aryl optionally substituted by halo, p is 0 or 1, q is 0 or 1 and t is 0 or an integer of from 1 to 10, provided that where q is 1, t is other than 0. The method is particularly useful in the production of oil- and/or water repellent fabrics.

A compound of formula (I), wherein R and R are independently selected from saturated fluorocarbon substituted side chains, such as NR (CH ) C F , O(CH ) C F , S(CH ) C F , NR S(O) (CH ) C F , or CR &lsqb;CO (CH ) C F &rsqb; , where R is hydrogen or alkyl, n and m are independently an integer of 1-12, and p is 0 or an integer of 1-12, R is an unsaturate moiety which may be polymerised, and X is O, S or NR where R is hydrogen or alkyl, as well as methods for the preparation of these compounds. Compounds of formula (I) are useful monomers in the preparation of oil- and water-repellent polymers.

Fluorinated triazine monomers

Fibre reactive polymers

Growing community of inventors

Salisbury, United Kingdom

Stuart Anson Brewer