Primer composition

Claim 2

A primer composition comprising (A) 100 parts by weight of a silane-modified resin obtained by reacting a resin formed by introducing an epoxy group and a hydroxyl group, which may be partially esterified, into a polymer comprising 1,3-pentadiene as a main monomer and having an iodine value of 200 to 500 and an average molecular weight of 350 to 10,000 with a silane having an epoxy, amino, or mercapto group, (B) 40 to 600 parts by weight of a mercapto group-containing silane represented by the general formula: HS(CH.sub.2).sub.a Si--OR.sup.1).sub.3 wherein a is an integer equal to 2 or 3, and R 1 is an alkyl group having 1 to 4 carbon atoms, (C) 10 to 400 parts by weight of an amino group-containing silane represented by the general formula ##STR3## where X stands for a substituted or unsubstituted amino group selected from the group consisting of: --N(R 3 ) 2 , --NH(CH 2 ) 2 N(R 3 ) 2 and --NH(CH 2 ) 2 NH(CH 2 ) 2 N(R 3 ) 2 , b is an integer equal to 3 or 4, c is an integer equal to 0 or 1, R 2 is an alkyl group having 1 to 4 carbon atoms, and R 3 is a hydrogen atom or an alkyl group having 1 or 2 carbon atoms, (D) 5 to 200 parts by weight of a silicon compound represented by the following formula or a partially hydrolyzed condensate thereof: (R.sup.4).sub.d Si(OR.sup.5).sub.4-d wherein R 4 is a monovalent hydrocarbon group having 1 to 6 carbon atoms, R 5 is an alkyl group having 1 to 4 carbon atoms or an alkoxyalkyl group having a total carbon number of 3 to 6, and d is an integer equal to 0 or 1, and (E) 300 to 3,000 parts by weight of an organic solvent.

Claim 3

A primer composition as set forth in claim 1, wherein silane-modified resin (A) is prepared by reacting a resin formed by introducing an epoxy group and a hydroxyl group, which may be partially esterified, into a polymer comprising 1,3-pentadiene as a main monomer and having an iodine value of 200 to 500 and an average molecular weight of 350 to 10,000 with a mercapto group-containing silane.

Claim 4

A primer composition as set forth in claim 1, wherein the amount of mercapto group-containing silane (B) is 100 to 300 parts by weight.

Claim 5

A primer composition as set forth in claim 1, wherein the amount of amino group-containing silane (C) is 20 to 200 parts by weight.

Claim 6

A primer composition as set forth in claim 1, wherein the amount of silicon compound (D) or partially hydrolyzed condensate thereof is 10 to 50 parts by weight.

Claim 7

A primer composition as set forth in claim 1, wherein organic solvent (E) is an aliphatic hydrocarbon.

Claim 8

A primer composition as set forth in claim 1, wherein the amount of organic solvent (E) is 500 to 1,500 parts by weight.

Claim 9

A primer composition comprising (A) 100 parts by weight of a silane-modified resin obtained by reacting a resin formed by introducing an epoxy group and a hydroxyl group, which may be partially esterified, into a polymer comprising 1,3-pentadiene as a main monomer and having an iodine value of 200 to 500 and an average molecular weight of 350 to 10,000 with a silane having an epoxy, amino, or mercapto group, (B) 40 to 600 parts by weight of a mercapto group-containing silane represented by the general formula: Hs(CH.sub.2).sub.a Si--OR.sup.1).sub.3 wherein a is an integer equal to 2 or 3, and R 1 is an alkyl group having 1 to 4 carbon atoms, (C) 10 to 400 parts by weight of an amino group-containing silane represented by the general formula ##STR4## where X stands for a substituted or unsubstituted amino group selected from the group consisting of: --N(R 3 ) 2 , --NH(CH 2 ) 2 N(R 3 ) 2 and --NH(CH 2 ) 2 NH(CH 2 ) 2 N(R 3 ) 2 , b is an integer equal to 3 or 4, c is an integer equal to 0 or 1, R 2 is an alkyl group having 1 to 4 carbon atoms, and R 3 is a hydrogen atom or an alkyl group having 1 or 2 carbon atoms, (D) 5 to 200 parts by weight of a silicon compound represented by the following formula or a partially hydrolyzed condensate thereof: (R.sup.4).sub.d Si(OR.sup.5).sub.4-d wherein R 4 is a monovalent hydrocarbon group having 1 to 6 carbon atoms, R 5 is an alkyl group having 1 to 4 carbon atoms or an alkoxyalkyl group having a total carbon number of 3 to 6, and d is an integer equal to 0 or 1, (E) 300 to 3,000 parts by weight of an organic solvent, and (F) 0.1 to 50 parts by weight of an organotitanium compound represented by the following general formulas or a partially hydrolyzed condensate thereof: Ti(OR.sup.6).sub.4, Ti(OR.sup.6).sub.2 L.sub.2 or TiL.sub.3 wherein R 6 is an alkyl group having 2 to 4 carbon atoms, and L is a group forming a chelate ring together with the titanium atom.

Claim 10

A primer composition comprising (A) 100 parts by weight of a silane-modified resin obtained by reacting a resin formed by introducing an epoxy group and a hydroxyl group, which may be partially esterified, into a polymer comprising 1,3-pentadiene as a main monomer and having an iodine value of 200 to 500 and an average molecular weight of 350 to 10,000 with a silane having an epoxy, amino, or mercapto group, (B) 40 to 600 parts by weight of a mercapto group-containing silane represented by the general formula: Hs(CH.sub.2).sub.a Si--OR.sup.1).sub.3 wherein a is an integer equal to 2 or 3, and R 1 is an alkyl group having 1 to 4 carbon atoms, (C) 10 to 400 parts by weight of an amino group-containing silane represented by the general formula ##STR4## where X stands for a substituted or unsubstituted amino group selected from the group consisting of: --N(R 3 ) 2 , --NH(CH 2 ) 2 N(R 3 ) 2 and --NH(CH 2 ) 2 NH(CH 2 ) 2 N(R 3 ) 2 , b is an integer equal to 3 or 4, c is an integer equal to 0 or 1, R 2 is an alkyl group having 1 to 4 carbon atoms, and R 3 is a hydrogen atom or an alkyl group having 1 or 2 carbon atoms, (D) 5 to 200 parts by weight of a silicon compound represented by the following formula or a partially hydrolyzed condensate thereof: (R.sup.4).sub.d Si(OR.sup.5).sub.4-d wherein R 4 is a monovalent hydrocarbon group having 1 to 6 carbon atoms, R 5 is an alkyl group having 1 to 4 carbon atoms or an alkoxyalkyl group having a total carbon number of 3 to 6, and d is an integer equal to 0 or 1, (E) 300 to 3,000 parts by weight of an organic solvent, and (F) 0.1 to 50 parts by weight of an organotitanium compound represented by the following general formulas or a partially hydrolyzed condensate thereof: Ti(OR.sup.6).sub.4, Ti(OR.sup.6).sub.2 L.sub.2 or TiL.sub.3 wherein R 6 is an alkyl group having 2 to 4 carbon atoms, and L is a group forming a chelate ring together with the titanium atom.

Claim 11

A primer composition as set forth in claim 8, wherein silane-modified resin (A) is prepared by reacting a resin formed by introducing an epoxy group and a hydroxyl group, which may be partially esterified, into a polymer comprising 1,3-pentadiene as a main monomer and having an iodine value of 200 to 500 and an average molecular weight of 350 to 10,000 with a mercapto group-containing silane.

Claim 12

A primer composition as set forth in claim 8, wherein the amount of mercapto group-containing silane (B) is 100 to 300 parts by weight.

Claim 13

A primer composition as set forth in claim 8, wherein the amount of amino group-containing silane (C) is 20 to 200 parts by weight.

Claim 14

A primer composition as set forth in claim 8, wherein the amount of silicon compound (D) or partially hydrolyzed condensate thereof is 10 to 50 parts by weight.

Claim 15

A primer composition as set forth in claim 8, wherein organic solvent (E) is an aliphatic hydrocarbon.

Claim 16

A primer composition as set forth in claim 8, wherein the amount of organic solvent (E) is 500 to 1,500 parts by weight.

Claim 17

A primer composition as set forth in claim 8, wherein the amount of organotitanium compound or partially hydrolyzed condensate thereof (F) is 1 to 10 parts by weight.