US4745159A — Methacrylate resin composition and process for it…

Claim 1

Independent Claim 71 words

A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR3## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, said composition having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition and a total light transmittance of from 89 to 95%.

Claim 2

Dependent Claim 71 words

A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR3## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, said composition having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition and a total light transmittance of from 89 to 95%.

Claim 3

Dependent Claim 38 words

The methacrylate resin composition according to claim 1, wherein the yellowness index (YIs) as measured in the form of the heated resin composition is from 0.1 to 1, and the total light transmittance is from 92 to 94%.

Claim 4

Dependent Claim 67 words

A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR4## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, said composition having a yellowness index (YIp) of at most 2.7 as measured in the form of a molded plate and a total light transmittance of from 89 to 95%.

Claim 5

Dependent Claim 67 words

A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR4## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, said composition having a yellowness index (YIp) of at most 2.7 as measured in the form of a molded plate and a total light transmittance of from 89 to 95%.

Claim 6

Dependent Claim 37 words

The methacrylate resin composition according to claim 3, wherein the yellowness index (YIp) as measured in the form of a molded plate is from 0.2 to 1.5, and the total light transmittance is from 92 to 94%.

Claim 7

Dependent Claim 88 words

A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR5## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, said composition having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition, a yellowness index (YIp) of at most 2.7 as measured in the form of a molded plate and a total light transmittance of from 89 to 95%.

Claim 8

Dependent Claim 88 words

A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR5## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, said composition having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition, a yellowness index (YIp) of at most 2.7 as measured in the form of a molded plate and a total light transmittance of from 89 to 95%.

Claim 9

Dependent Claim 56 words

The methacrylate resin composition according to claim 5, wherein the yellowness index (YIs) as measured in the form of the heated resin composition is from 0.1 to 1, the yellowness index (YIp) as measured in the form of a molded plate is from 0.2 to 1.5, and the total light transmittance is from 92 to 94%.

Claim 10

Dependent Claim 98 words

A process for preparing a methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR6## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, which comprises reacting a resin comprising methyl methacrylate units as the main constituent units and having a methyl methacrylate dimer content of not higher than 1,000 ppm, with an amine of the formula RNH 2 wherein R is as defined above, under a condition such that said resin is dissolved in a solvent mixture for the resin.

Claim 11

Dependent Claim 98 words

A process for preparing a methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR6## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, which comprises reacting a resin comprising methyl methacrylate units as the main constituent units and having a methyl methacrylate dimer content of not higher than 1,000 ppm, with an amine of the formula RNH 2 wherein R is as defined above, under a condition such that said resin is dissolved in a solvent mixture for the resin.

Claim 12

Dependent Claim 36 words

The process for preparing a methacrylic resin composition according to claim 7, wherein the methyl methacrylate dimer content in the resin comprising methyl methacrylate units as the main constituent units, is not higher than 250 ppm.

Claim 13

Dependent Claim 34 words

The process for preparing a methacrylate resin composition according to claim 7, wherein the solvent mixture for the resin is a mixture of benzene, toluene, xylene or a mixture thereof, and an aliphatic alcohol.

Claim 14

Dependent Claim 73 words

The process for preparing a methacrylate resin composition according to claim 7, wherein the proportions of (1) the resin, (2) benzene, toluene, xylene or a mixture thereof in the solvent mixture and (3) the aliphatic alcohol in the solvent mixture, are from 5 to 80 parts by weight, from 19 to 94 parts by weight and from 1 to 76 parts by weight, respectively (relative to the total of 100 parts by weight).

Claim 15

Dependent Claim 30 words

The process for preparing a methacrylate resin composition according to claim 9, wherein the aliphatic alcohol is methyl alcohol, ethyl alcohol, propyl alcohol, isopropyl alcohol, butyl alcohol or isobutyl alcohol.

Claim 16

Dependent Claim 115 words

A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR7## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, said composition having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition and a total light transmittance of from 89 to 95%, said composition being produced by dissolving a resin comprising methylmethacrylate having a dimer content of not higher than 1000 ppm in a solvent mixture and reacting the dissolved resin with an amine of the formula RNH 2 , wherein R is as defined above.

Claim 17

Dependent Claim 115 words

A methacrylate resin composition comprising a methacrylate resin containing methacrylimide units of the following formula: ##STR7## wherein R is a hydrogen atom or an aliphatic, alicyclic or aromatic hydrocarbon group having from 1 to 20 carbon atoms, said composition having a yellowness index (YIs) of at most 3 as measured in the form of a solution of the heated resin composition and a total light transmittance of from 89 to 95%, said composition being produced by dissolving a resin comprising methylmethacrylate having a dimer content of not higher than 1000 ppm in a solvent mixture and reacting the dissolved resin with an amine of the formula RNH 2 , wherein R is as defined above.

Claim 18

Dependent Claim 31 words

The methacrylate resin composition according to claim 12, wherein the solvent mixture comprises at least one material selected from the group consisting of benzene, toluene and xylene, and an aliphatic alcohol.

Claim 19

Dependent Claim 76 words

The methacrylate resin composition according to claim 12, wherein from 5 to 80 parts by weight of the resin are dissolved in the solvent mixture which comprises 19 to 94 parts by weight of said material selected from the group consisting of benzene, toluene and xylene, and from 1 to 76 parts by weight of said aliphatic alcohol, and wherein the resin and the solvent mixture together make up a total of 100 parts by weight.

Claim 20

Dependent Claim 32 words

The methacrylate resin composition according to claim 12, wherein the aliphatic alcohol is selected from the group consisting of methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol and isobutyl alcohol.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1991-05-17	1991-11-16	1992-05-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1995-05-17	1995-11-16	1996-05-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1999-05-17	1999-11-16	2000-05-17	$7700.00	Window Closed / Lapsed

Methacrylate resin composition and process for its preparation

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