Method for rendering flexible sheet material non-adherent

Claim 1

A method for rendering flexible sheet materials non-adherent to surfaces which normally adhere thereto, said method comprising applying to said flexible sheet material, an amount of a solventless composition that will render said flexible sheet material non-adherent to surfaces which normally adhere thereto, said solventless composition comprising: a. from 5-20 parts by weight of a silanol chainstopped polysiloxane having the formula: ##STR4## wherein R is a monovalent hydrocarbon radical, a halogenated monovalent hydrocarbon radical or a cyanoalkyl radical and t has a value which will give a viscosity between 300 and 1,000 cstks. at 25° C; b. from 0.1 to 5 parts by weight of an organic hydrogenpolysiloxane of the formula: ##EQU4## wherein R is the same as hereinabove defined and a is 0 to 3, b is 0.005 to 2.0 and a plus b is 0.8 to 3.0; and a sufficient amount of a dialkyltin catalyst for curing said composition.

Claim 2

A method for rendering flexible sheet materials non-adherent to surfaces which normally adhere thereto, said method comprising applying to said flexible sheet material, an amount of a solventless composition that will render said flexible sheet material non-adherent to surfaces which normally adhere thereto, said solventless composition comprising: a. from 5-20 parts by weight of a silanol chainstopped polysiloxane having the formula: ##STR4## wherein R is a monovalent hydrocarbon radical, a halogenated monovalent hydrocarbon radical or a cyanoalkyl radical and t has a value which will give a viscosity between 300 and 1,000 cstks. at 25° C; b. from 0.1 to 5 parts by weight of an organic hydrogenpolysiloxane of the formula: ##EQU4## wherein R is the same as hereinabove defined and a is 0 to 3, b is 0.005 to 2.0 and a plus b is 0.8 to 3.0; and a sufficient amount of a dialkyltin catalyst for curing said composition.

Claim 4

A method for rendering flexible sheet materials non-adherent to surfaces which normally adhere thereto said method comprising: a. first applying to said flexible sheet material an amount of dialkyltin catalyst for curing a coating composition which comprises: i. a silanol chainstopped polysiloxane having the formula ##STR5## wherein R is a monovalent hydrocarbon radical, a halogenated hydrocarbon radical or a cyanoalkyl radical and t has a value which will give a viscosity between 300 and 1000 cstks. at 25° C; and ii. an organic hydrogenpolysiloxane of the formula ##EQU5## wherein R is the same as hereinabove defined and a is 0 to 3, b is 0.005 to 2.0 and a plus b is 0.8 to 3.0; b. applying said coating composition to the catalyzed flexible sheet and; c. curing said coating composition.

Claim 5

A method for rendering flexible sheet materials non-adherent to surfaces which normally adhere thereto said method comprising: a. first applying to said flexible sheet material an amount of dialkyltin catalyst for curing a coating composition which comprises: i. a silanol chainstopped polysiloxane having the formula ##STR5## wherein R is a monovalent hydrocarbon radical, a halogenated hydrocarbon radical or a cyanoalkyl radical and t has a value which will give a viscosity between 300 and 1000 cstks. at 25° C; and ii. an organic hydrogenpolysiloxane of the formula ##EQU5## wherein R is the same as hereinabove defined and a is 0 to 3, b is 0.005 to 2.0 and a plus b is 0.8 to 3.0; b. applying said coating composition to the catalyzed flexible sheet and; c. curing said coating composition.