Patent GB-1077190-A (GB)
Title: Composition of waterproof agent and process for manufacture of waterproof cloth using the same
IPC: C08L83/04
Filed: 1964-12-02
Abstract: A water-proofing composition has the following composition: (1) a hydroxyl terminate dimethyl polysiloxane:  <FORM:1077190/C3/1> where n is a positive integer, (2) methyl hydrogen polysiloxane of average formula <FORM:1077190/C3/2> where n=1 to 1.5, m=0.75 to 1.25 and n+m=2 to 2.5, (3) an aminoalkylalkoxysilane <FORM:1077190/C3/3> where R is an alkyl group with less than 4 carbon atoms, R1 is an alkylene group having more than 3 carbon atoms, R11 is an alkyl group with less than 4 carbon atoms or phenyl, Z is an amino group or a polyaminoalkyl group combined to R1 through a C-N bond and a=0 or 1, (4) an organotin compound <FORM:1077190/C3/4> where the R's are the same or different alkyl or acyl groups having less than 18 carbon atoms or phenyl, and (5) an organic solvent.  (1) may be present at 5 to 50 parts by weight, (2) at 0.3 to 30 parts by weight, (3) at 0.02 to 5 parts by weight, (4) at 0.1 to 5 parts by weight and (5) at 35 to 95 parts by weight. The composition may also be used in combination with one or more of the following resins: acrylic acid ester polymers or copolymers with methacrylic acid esters, acrylonitrile, styrene or butadiene, polyurethanes and chlorosulphonated polyethylenes.  From 5-200 parts of the polysiloxane composition may be used per 100 parts of the other resin.  In an example a composition of 18 parts by weight dimethylpolysiloxane, 2 parts by weight methyl hydrogen polysiloxane, 0.2 parts by weight <FORM:1077190/C3/5> 0.7 parts by weight dibutyl tin dilaurate dissolved in 79.1 parts of trichloroethylene is mixed in varying proportions with a copolymer of butyl acrylate and acrylonitrile.ALSO:Cloth, e.g. of nylon, polyester, polypropylene, cellulose acetate, bemberg, rayon or cotton, is coated with a waterproofing composition: (1) a hydroxyl terminated dimethyl polysiloxane (2) methyl hydrogen polysiloxane of average general formula:  <FORM:1077190/B1-B2/1> where n=1 to 1.5, m=0.75 to 1.25 and n + m =2 to 2.5.  (3) an aminoalkylalkoxysilane: <FORM:1077190/B1-B2/2> where R is an alkyl group with less than 4 carbon atoms, R1 is an alkylene group having >3 carbon atoms R11 is the same as R or phenyl, Z is an amino group or a polyaminoalkyl group combined to R1 through a C - N bond and a=0 or 1, (4) an organo-tin compound: <FORM:1077190/B1-B2/3> where the R1 are the same or different alkyl groups having less than 18 carbon atoms, and (5) an organic solvent.  (1) may be present at 5 to 50 parts by wt., (2) at 0.3 to 30 parts by wt., (3) at 0.02 to 5 parts by wt., (4) at 0.1 to 5 parts by wt., and (5) at 35 to 95 parts by wt.  The composition may also be used in combination with one or more of the following resins: acrylic acid esters, polyurethanes and chlorosulphonated polyethylenes.  From 5-200 parts of the polysiloxane composition may be used per 100 parts of the other resin.  The compositions may be applied to the cloth at from 3 to 30 grams of resin per m2 of cloth, it may be heated at 60-100 DEG C. to evaporate the solvent and finally heated at 120-180 DEG C.