摘要:
A room temperature fast-curing organopolysiloxane composition which has excellent fast curability as well as deep curability is provided without using an organic compound having C═O group and the organic compound having NH2 group which are the volatile components. A method for curing such composition is also provided. The room temperature fast-curing organopolysiloxane composition comprises: (A) 100 parts by weight of a diorganopolysiloxane having both ends terminated with hydroxy group and/or a hydrolyzable group; (B) 0.5 to 10 parts by weight of a silane and/or a siloxane having at least 3 alkenoxysilyl groups in its molecule and being capable of forming a compound having —NH2 group by hydrolysis; (C) 0.5 to 10 parts by weight of a silane and/or a siloxane having at least 3 aminosilyl groups in its molecule and being capable of forming a compound having —NH2 group by hydrolysis; and (D) 0.01 to 10 parts by weight of a curing catalyst.
摘要:
A room temperature fast-curing organopolysiloxane composition which has excellent fast curability as well as deep curability is provided without using an organic compound having C═O group and the organic compound having NH2 group which are the volatile components. A method for curing such composition is also provided. The room temperature fast-curing organopolysiloxane composition comprises: (A) 100 parts by weight of a diorganopolysiloxane having both ends terminated with hydroxy group and/or a hydrolyzable group; (B) 0.5 to 10 parts by weight of a silane and/or a siloxane having at least 3 alkenoxysilyl groups in its molecule and being capable of forming a compound having —NH2 group by hydrolysis; (C) 0.5 to 10 parts by weight of a silane and/or a siloxane having at least 3 aminosilyl groups in its molecule and being capable of forming a compound having —NH2 group by hydrolysis; and (D) 0.01 to 10 parts by weight of a curing catalyst.
摘要:
A room temperature fast-curing organopolysiloxane composition which has excellent fast curability as well as deep curability is provided without using an organic compound having C═O group and the organic compound having NH2 group which are the volatile components. A method for curing such composition is also provided. The room temperature fast-curing organopolysiloxane composition comprises: (A) 100 parts by weight of a diorganopolysiloxane having both ends terminated with hydroxy group and/or a hydrolyzable group; (B) 0.5 to 10 parts by weight of a silane and/or a siloxane having at least 3 alkenoxysilyl groups in its molecule and being capable of forming a compound having —NH2 group by hydrolysis; (C) 0.5 to 10 parts by weight of a silane and/or a siloxane having at least 3 aminosilyl groups in its molecule and being capable of forming a compound having —NH2 group by hydrolysis; and (D) 0.01 to 10 parts by weight of a curing catalyst.
摘要:
An organopolysiloxane composition suited for magnesium alloy bonding comprises (A) a specific organopolysiloxane, (B) a non-reactive silicone oil, (C) zinc oxide surface treated with a silane or siloxane treating agent, (D) heavy calcium carbonate surface treated with a paraffin treating agent, (E) an organosilicon compound having at least three hydrolyzable radicals or a partial hydrolyzate thereof, (F) a silane coupling agent having at least one epoxy radical, and (G) a titanium chelate catalyst. The composition has improved chemical resistance.
摘要:
An organopolysiloxane composition for bonding to magnesium alloys comprises (A) 100 parts by weight of an organopolysiloxane of the following general formula (1) and/or (2) wherein R may be the same or different and represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and n is an integer of at least 10, X represents an oxygen atom or an alkylene group having 2 to 5 carbon atoms, and m independently represents an integer of 0 or 1, (B) 0.1 to 50 parts by weight of an organosilicon compound having at least three hydrolyzable groups bonded to silicon atoms in one molecule and/or a partial hydrolyzate thereof, and (C) 0.1 to 15 parts by weight of an acidic silane coupling agent.
摘要:
An organopolysiloxane composition for bonding to magnesium alloys comprises (A) 100 parts by weight of an organopolysiloxane of the following general formula (1) and/or (2) wherein R may be the same or different and represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 10 carbon atoms, and n is an integer of at least 10, X represents an oxygen atom or an alkylene group having 2 to 5 carbon atoms, and m independently represents an integer of 0 or 1, (B) 0.1 to 50 parts by weight of an organosilicon compound having at least three hydrolyzable groups bonded to silicon atoms in one molecule and/or a partial hydrolyzate thereof, and (C) 0.1 to 15 parts by weight of an acidic silane coupling agent.
摘要:
In a process for preparing a one-package RTV organopolysiloxane composition comprising (A) an organopolysiloxane containing at least two Si—OH groups or hydrolyzable groups, (B) an organosilane having at least two hydrolyzable groups or a partial hydrolyzate thereof, and (C) an inorganic filler, components (A) and (B) are premixed in a substantially anhydrous state, and component (C) is then added to the premix. Despite the absence of sag-control agents, the composition in the uncured state has a sufficient viscosity for sag-control, ease of extrusion, and improved slump properties.
摘要:
A room temperature curable organopolysiloxane composition including:(A) a diorganopolysiloxane terminated with a hydroxyl group at the both terminal ends and having a viscosity at 25.degree. C. of 25 to 1,000,000 cSt,(B) an organosilane having 3 or more hydrolyzable groups per molecule, a partially hydrolyzed and condensed product thereof or a mixture thereof, said hydrolyzable group is a ketoxime group or an alkenyloxy groups, anda thin leaf-like inorganic filler. This can give cured products with good oil resistance, and suitable as FIPG materials for automobiles.
摘要:
An organopolysiloxane composition suited for magnesium alloy bonding comprises (A) a specific organopolysiloxane, (B) a non-reactive silicone oil, (C) zinc oxide surface treated with a silane or siloxane treating agent, (D) heavy calcium carbonate surface treated with a paraffin treating agent, (E) an organosilicon compound having at least three hydrolyzable radicals or a partial hydrolyzate thereof, (F) a silane coupling agent having at least one epoxy radical, and (G) a titanium chelate catalyst. The composition has improved chemical resistance.
摘要:
A room temperature curable organopolysiloxane composition comprising (A) a diorganopolysiloxane endcapped at both ends of the molecular chain with hydroxy group (HO—(R2SiO)n—H wherein R represents a monovalent hydrocarbon group, and n represents an integer of at least 10); (B) a silane having at least two dialkyl ketoxime groups in its molecule (R1x—Si(—O—N═CR2R3)4−x wherein R1 represents a monovalent hydrocarbon group, R2 and R3 represents a monovalent hydrocarbon group or R2 and R3 may together form a ring with the carbon atom to which they are bonded to, and x represents an integer of 0 to 2 and/or a partial hydrolysate thereof; (C) a filler selected from the group consisting of zinc carbonate, zinc oxide, zinc hydroxide, and mixtures thereof; (D) a curing catalyst; and (E) a hindered phenol compound having a molecular weight of at least 400.